#include "moddedapplication.h"
#include "deployerfactory.h"
#include "installer.h"
#include "parseerror.h"
#include "pathutils.h"
#include "reversedeployer.h"
#include <algorithm>
#include <fstream>
#include <ranges>
#include <regex>

namespace sfs = std::filesystem;
namespace str = std::ranges;
namespace pu = path_utils;


ModdedApplication::ModdedApplication(sfs::path staging_dir,
                                     std::string name,
                                     std::string command,
                                     std::filesystem::path icon_path,
                                     std::string app_version) :
  name_(name), staging_dir_(staging_dir), command_(command), icon_path_(icon_path)
{
  if(sfs::exists(staging_dir / CONFIG_FILE_NAME))
    updateState(true);
  else
  {
    addProfile({ "Default", app_version, -1 });
    updateSettings(true);
  }
  sfs::copy(staging_dir_ / CONFIG_FILE_NAME,
            staging_dir_ / ("." + CONFIG_FILE_NAME + ".bak"),
            sfs::copy_options::overwrite_existing);
}

void ModdedApplication::deployMods()
{
  std::vector<int> deployers;
  for(int i = 0; i < deployers_.size(); i++)
    deployers.push_back(i);
  deployModsFor(deployers);
}

void ModdedApplication::deployModsFor(std::vector<int> deployers)
{
  str::sort(deployers,
            [this](int depl_l, int depl_r)
            {
              return this->deployers_[depl_l]->getDeployPriority() <
                     this->deployers_[depl_r]->getDeployPriority();
            });

  std::vector<float> weights;
  for(int deployer : deployers)
  {
    const int num_mods = deployers_[deployer]->getNumMods();
    // Reverse deployer operations are faster than other operations
    if(deployers_[deployer]->getType() == DeployerFactory::REVERSEDEPLOYER)
      weights.push_back((int)(num_mods / 8));
    else if(deployers_[deployer]->isAutonomous() || num_mods == 0)
      weights.push_back(1);
    else
      weights.push_back(num_mods);
  }

  ProgressNode node(progress_callback_, weights);
  for(auto [i, deployer] : str::enumerate_view(deployers))
  {
    const auto mod_sizes = deployers_[deployer]->deploy(&(node.child(i)));
    if(!deployers_[deployer]->isAutonomous())
    {
      for(const auto [mod_id, mod_size] : mod_sizes)
      {
        auto mod_iter =
          str::find_if(installed_mods_, [id = mod_id](const Mod& m) { return m.id == id; });
        if(mod_iter != installed_mods_.end())
          mod_iter->size_on_disk = mod_size;
      }
    }
  }

  updateSettings(true);
}

void ModdedApplication::unDeployMods()
{
  std::vector<int> deployers;
  for(int i = 0; i < deployers_.size(); i++)
    deployers.push_back(i);
  unDeployModsFor(deployers);
}

void ModdedApplication::unDeployModsFor(std::vector<int> deployers)
{
  str::sort(deployers,
            [this](int depl_l, int depl_r)
            {
              return this->deployers_[depl_l]->getDeployPriority() <
                     this->deployers_[depl_r]->getDeployPriority();
            });

  std::vector<float> weights;
  for(int deployer : deployers)
  {
    const int num_mods = deployers_[deployer]->getNumMods();
    if(deployers_[deployer]->isAutonomous() || num_mods == 0)
      weights.push_back(1);
    else
      weights.push_back(num_mods);
  }

  ProgressNode node(progress_callback_, weights);
  for(auto [i, deployer] : str::enumerate_view(deployers))
    deployers_[deployer]->unDeploy(&(node.child(i)));

  updateSettings(true);
}

void ModdedApplication::installMod(const ImportModInfo& info)
{
  if(info.replace_mod && info.target_group_id != -1)
  {
    replaceMod(info);
    return;
  }
  ProgressNode progress_node(progress_callback_);
  if(info.target_group_id >= 0 && !info.deployers.empty())
    progress_node.addChildren({ 1.0f, 10.0f, info.deployers.size() > 1 ? 10.0f : 1.0f });
  else if(info.target_group_id >= 0 || !info.deployers.empty())
    progress_node.addChildren({ 1, 10 });
  else
    progress_node.addChildren({ 1 });
  progress_node.child(0).setTotalSteps(1);
  int mod_id = 0;
  if(!installed_mods_.empty())
    mod_id = std::max_element(installed_mods_.begin(), installed_mods_.end())->id + 1;
  while(pu::exists(staging_dir_ / std::to_string(mod_id)) &&
        mod_id < std::numeric_limits<int>().max())
    mod_id++;
  if(mod_id == std::numeric_limits<int>().max())
    throw std::runtime_error("Error: Could not generate new mod id.");
  last_mod_id_ = mod_id;
  const auto mod_size = Installer::install(info.current_path,
                                           staging_dir_ / std::to_string(mod_id),
                                           info.installer_flags,
                                           info.installer,
                                           info.root_level,
                                           info.files);
  const auto time_now = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
  installed_mods_.emplace_back(mod_id,
                               info.name,
                               info.version,
                               time_now,
                               info.local_source,
                               info.remote_source,
                               time_now,
                               mod_size,
                               time_now,
                               info.remote_mod_id,
                               info.remote_file_id,
                               info.remote_type);
  installer_map_[mod_id] = info.installer;
  progress_node.child(0).advance();
  if(info.target_group_id >= 0)
  {
    if(modHasGroup(info.target_group_id))
      addModToGroup(mod_id, group_map_[info.target_group_id], &progress_node.child(1));
    else
      createGroup(mod_id, info.target_group_id, &progress_node.child(1));
  }

  for(int deployer : info.deployers)
    addModToDeployer(deployer, mod_id, true, &progress_node.child(info.target_group_id >= 0 ? 2 : 1));

  for(auto& tag : auto_tags_)
    tag.updateMods(staging_dir_, std::vector<int>{ mod_id });
  updateAutoTagMap();

  updateSettings(true);
}

void ModdedApplication::uninstallMods(const std::vector<int>& mod_ids,
                                      const std::string& installer_type)
{
  std::vector<float> weights;
  std::vector<std::vector<int>> update_targets;
  for(int depl = 0; depl < deployers_.size(); depl++)
    update_targets.push_back({});
  for(int mod_id : mod_ids)
  {
    if(group_map_.contains(mod_id))
      removeModFromGroup(mod_id, false);
    auto mod_iter = std::find_if(
      installed_mods_.begin(), installed_mods_.end(), [mod_id](Mod m) { return m.id == mod_id; });
    if(mod_iter == installed_mods_.end())
      continue;
    for(int depl = 0; depl < deployers_.size(); depl++)
    {
      if(deployers_[depl]->isAutonomous())
        continue;
      for(int prof = 0; prof < profile_names_.size(); prof++)
      {
        deployers_[depl]->setProfile(prof);
        if(deployers_[depl]->removeMod(mod_id) &&
           str::find(update_targets[depl], prof) == update_targets[depl].end())
        {
          update_targets[depl].push_back(prof);
          weights.push_back(deployers_[depl]->getNumMods());
        }
      }
      deployers_[depl]->setProfile(current_profile_);
    }

    installed_mods_.erase(mod_iter);
    std::string installer = Installer::SIMPLEINSTALLER;
    if(installer_type == "" && installer_map_.contains(mod_id))
      installer = installer_map_[mod_id];
    Installer::uninstall(staging_dir_ / std::to_string(mod_id), installer);

    for(auto& tag : manual_tags_)
      tag.removeMod(mod_id);
  }

  ProgressNode node(progress_callback_, weights);
  int i = 0;
  for(int depl = 0; depl < update_targets.size(); depl++)
  {
    for(int prof : update_targets[depl])
    {
      deployers_[depl]->setProfile(prof);
      deployers_[depl]->updateConflictGroups(&node.child(i));
      i++;
    }
    deployers_[depl]->setProfile(current_profile_);
  }

  updateSettings(true);
}

void ModdedApplication::changeLoadorder(int deployer, int from_index, int to_index)
{
  deployers_[deployer]->changeLoadorder(from_index, to_index);
  updateSettings(true);
}

void ModdedApplication::addModToDeployer(int deployer,
                                         int mod_id,
                                         bool update_conflicts,
                                         std::optional<ProgressNode*> progress_node)
{
  if(!deployers_[deployer]->isAutonomous())
  {
    const bool was_added = deployers_[deployer]->addMod(mod_id);
    ProgressNode node(progress_callback_);
    if(update_conflicts && was_added)
      deployers_[deployer]->updateConflictGroups(progress_node ? progress_node : &node);
    else if(progress_node)
    {
      (*progress_node)->setTotalSteps(1);
      (*progress_node)->advance();
    }
    splitMod(mod_id, deployer);
    updateSettings(true);
  }
}

void ModdedApplication::removeModFromDeployer(int deployer,
                                              int mod_id,
                                              bool update_conflicts,
                                              std::optional<ProgressNode*> progress_node)
{
  if(!deployers_[deployer]->isAutonomous())
  {
    const bool was_removed = deployers_[deployer]->removeMod(mod_id);
    ProgressNode node(progress_callback_);
    if(update_conflicts && was_removed)
      deployers_[deployer]->updateConflictGroups(progress_node ? progress_node : &node);
    else if(progress_node)
    {
      (*progress_node)->setTotalSteps(1);
      (*progress_node)->advance();
    }
    updateSettings(true);
  }
}

void ModdedApplication::setModStatus(int deployer, int mod_id, bool status)
{
  deployers_[deployer]->setModStatus(mod_id, status);
  updateSettings(true);
}

void ModdedApplication::addDeployer(const EditDeployerInfo& info)
{
  std::string source_dir = staging_dir_;
  const bool is_autonomous = DeployerFactory::AUTONOMOUS_DEPLOYERS.at(info.type);
  if(info.type == DeployerFactory::REVERSEDEPLOYER)
  {
    long id = 0;
    source_dir = staging_dir_ / std::format("rev_depl_{}", id);
    while(pu::exists(source_dir))
      source_dir = staging_dir_ / std::format("rev_depl_{}", ++id);
  }
  else if(is_autonomous)
    source_dir = info.source_dir;
  deployers_.push_back(DeployerFactory::makeDeployer(info.type,
                                                     source_dir,
                                                     info.target_dir,
                                                     info.name,
                                                     info.deploy_mode,
                                                     info.separate_profile_dirs,
                                                     info.update_ignore_list));
  deployers_.back()->setEnableUnsafeSorting(info.enable_unsafe_sorting);
  for(int i = 0; i < profile_names_.size(); i++)
    deployers_.back()->addProfile();
  deployers_.back()->setProfile(current_profile_);
  deployers_.back()->setLog(log_);
  if(!is_autonomous)
  {
    for(int i = 0; i < installed_mods_.size(); i++)
    {
      for(int depl = 0; depl < deployers_.size(); depl++)
      {
        if(deployers_[depl]->hasMod(installed_mods_[i].id))
          splitMod(installed_mods_[i].id, depl);
      }
    }
  }
  updateSettings(true);
}

void ModdedApplication::removeDeployer(int deployer, bool cleanup)
{
  if(cleanup)
    deployers_[deployer]->cleanup();
  deployers_.erase(deployers_.begin() + deployer);
  updateSettings(true);
}

std::vector<std::string> ModdedApplication::getDeployerNames() const
{
  std::vector<std::string> names;
  for(const auto& deployer : deployers_)
    names.push_back(deployer->getName());
  return names;
}

std::vector<ModInfo> ModdedApplication::getModInfo() const
{
  std::vector<ModInfo> mod_info{};
  for(const auto& mod : installed_mods_)
  {
    std::vector<std::string> deployer_names;
    std::vector<int> deployer_ids;
    std::vector<bool> statuses;
    for(int i = 0; i < deployers_.size(); i++)
    {
      if(deployers_[i]->isAutonomous())
        continue;
      auto status = deployers_[i]->getModStatus(mod.id);
      if(status)
      {
        deployer_names.push_back(deployers_[i]->getName());
        deployer_ids.push_back(i);
        statuses.push_back(*status);
      }
    }

    int group = -1;
    bool is_active = false;
    if(group_map_.contains(mod.id))
    {
      group = group_map_.at(mod.id);
      is_active = active_group_members_[group] == mod.id;
    }

    mod_info.emplace_back(
      mod,
      deployer_names,
      deployer_ids,
      statuses,
      group,
      is_active,
      manual_tag_map_.contains(mod.id) ? manual_tag_map_.at(mod.id) : std::vector<std::string>{},
      auto_tag_map_.contains(mod.id) ? auto_tag_map_.at(mod.id) : std::vector<std::string>{});
  }
  return mod_info;
}

std::vector<std::tuple<int, bool>> ModdedApplication::getLoadorder(int deployer) const
{
  return deployers_[deployer]->getLoadorder();
}

const sfs::path& ModdedApplication::getStagingDir() const
{
  return staging_dir_;
}

void ModdedApplication::setStagingDir(std::string staging_dir, bool move_existing)
{
  if(staging_dir == staging_dir_)
    return;
  if(move_existing)
  {
    for(const auto& mod : installed_mods_)
    {
      std::string mod_dir = std::to_string(mod.id);
      sfs::rename(staging_dir_ / mod_dir, sfs::path(staging_dir) / mod_dir);
    }
    sfs::rename(staging_dir_ / CONFIG_FILE_NAME, sfs::path(staging_dir) / CONFIG_FILE_NAME);
  }
  staging_dir_ = staging_dir;
  updateState(true);
}

const std::string& ModdedApplication::name() const
{
  return name_;
}

void ModdedApplication::setName(const std::string& newName)
{
  name_ = newName;
  updateSettings(true);
}

int ModdedApplication::getNumDeployers() const
{
  return deployers_.size();
}

const std::string& ModdedApplication::getConfigFileName() const
{
  return CONFIG_FILE_NAME;
}

void ModdedApplication::changeModName(int mod_id, const std::string& new_name)
{
  auto iter = std::find_if(
    installed_mods_.begin(), installed_mods_.end(), [mod_id](Mod m) { return m.id == mod_id; });
  if(iter == installed_mods_.end())
    throw std::runtime_error("Error: Unknown mod id: " + std::to_string(mod_id));
  iter->name = new_name;
  updateSettings(true);
}

std::vector<ConflictInfo> ModdedApplication::getFileConflicts(int deployer,
                                                              int mod_id,
                                                              bool show_disabled) const
{
  ProgressNode node(progress_callback_);
  auto conflicts = deployers_[deployer]->getFileConflicts(mod_id, show_disabled, &node);
  if(deployers_[deployer]->isAutonomous())
    return conflicts;
  for(auto& [_, ids, names] : conflicts)
  {
    for(int id : ids)
      names.push_back(getModName(id));
  }
  return conflicts;
}

AppInfo ModdedApplication::getAppInfo() const
{
  AppInfo info;
  info.name = name_;
  info.staging_dir = staging_dir_.string();
  info.command = command_;
  info.num_mods = installed_mods_.size();
  info.app_version = app_versions_[current_profile_];
  for(const auto& deployer : deployers_)
  {
    info.deployers.push_back(deployer->getName());
    info.deployer_types.push_back(deployer->getType());
    info.target_dirs.push_back(deployer->getDestPath());
    info.deployer_source_dirs.push_back(deployer->getSourcePath());
    info.deployer_mods.push_back(deployer->getNumMods());
    info.deploy_modes.push_back(deployer->getDeployMode());
    info.deployer_is_case_invariant.push_back(deployer->isCaseInvariant());
  }
  info.tools = tools_;
  for(const auto& tag : manual_tags_)
    info.num_mods_per_manual_tag[tag.getName()] = tag.getNumMods();
  for(const auto& tag : auto_tags_)
  {
    info.num_mods_per_auto_tag[tag.getName()] = tag.getNumMods();
    info.auto_tags[tag.getName()] = { tag.getExpression(), tag.getConditions() };
  }
  return info;
}

void ModdedApplication::addTool(const Tool& tool)
{
  tools_.push_back(tool);
  updateSettings(true);
}

void ModdedApplication::removeTool(int tool_id)
{
  if(tool_id < tools_.size() && tool_id >= 0)
  {
    tools_.erase(tools_.begin() + tool_id);
    updateSettings(true);
  }
}

std::vector<Tool> ModdedApplication::getTools() const
{
  return tools_;
}

const std::string& ModdedApplication::command() const
{
  return command_;
}

void ModdedApplication::setCommand(const std::string& newCommand)
{
  command_ = newCommand;
  updateSettings(true);
}

void ModdedApplication::editDeployer(int deployer, const EditDeployerInfo& info)
{
  if(deployers_[deployer]->getType() == info.type)
  {
    deployers_[deployer]->setName(info.name);
    deployers_[deployer]->setDestPath(info.target_dir);
    deployers_[deployer]->setDeployMode(info.deploy_mode);
    deployers_[deployer]->setEnableUnsafeSorting(info.enable_unsafe_sorting);
  }
  else
  {
    if(info.type == DeployerFactory::REVERSEDEPLOYER)
    {
      long id = 0;
      sfs::path source_dir = staging_dir_ / std::format("rev_depl_{}", id);
      while(pu::exists(source_dir))
        source_dir = staging_dir_ / std::format("rev_depl_{}", ++id);
      json_settings_["deployers"][deployer]["source_path"] = source_dir.string();
      json_settings_["deployers"][deployer]["update_profiles"] = true;
    }
    else
      json_settings_["deployers"][deployer]["source_path"] = info.source_dir;
    json_settings_["deployers"][deployer]["name"] = info.name;
    json_settings_["deployers"][deployer]["dest_path"] = info.target_dir;
    json_settings_["deployers"][deployer]["type"] = info.type;
    json_settings_["deployers"][deployer]["deploy_mode"] = info.deploy_mode;
    json_settings_["deployers"][deployer]["enable_unsafe_sorting"] = info.enable_unsafe_sorting;
    updateState();
  }
  if(deployers_[deployer]->isAutonomous() && info.type != DeployerFactory::REVERSEDEPLOYER)
    deployers_[deployer]->setSourcePath(info.source_dir);
  if(info.type == DeployerFactory::REVERSEDEPLOYER)
  {
    auto depl = static_cast<ReverseDeployer*>(deployers_[deployer].get());
    depl->enableSeparateDirs(info.separate_profile_dirs);
    if(!info.update_ignore_list && depl->getNumIgnoredFiles() != 0)
      depl->deleteIgnoredFiles();
    else if(info.update_ignore_list && depl->getNumIgnoredFiles() == 0)
      depl->updateIgnoredFiles(true);
  }
  updateSettings(true);
}

std::unordered_set<int> ModdedApplication::getModConflicts(int deployer, int mod_id)
{
  ProgressNode node(progress_callback_);
  return deployers_[deployer]->getModConflicts(mod_id, &node);
}

void ModdedApplication::setProfile(int profile)
{
  if(profile < 0 || profile >= profile_names_.size())
    return;
  bak_man_.setProfile(profile);
  for(const auto& deployer : deployers_)
    deployer->setProfile(profile);
  current_profile_ = profile;
}

void ModdedApplication::addProfile(const EditProfileInfo& info)
{
  profile_names_.push_back(info.name);
  app_versions_.push_back(info.app_version);
  for(const auto& deployer : deployers_)
    deployer->addProfile(info.source);
  bak_man_.addProfile(info.source);
  updateSettings(true);
}

void ModdedApplication::removeProfile(int profile)
{
  if(profile < 0 || profile >= profile_names_.size())
    return;
  for(const auto& deployer : deployers_)
    deployer->removeProfile(profile);
  profile_names_.erase(profile_names_.begin() + profile);
  app_versions_.erase(app_versions_.begin() + profile);
  bak_man_.removeProfile(profile);
  if(profile == current_profile_)
    setProfile(0);
  else if(profile < current_profile_)
    setProfile(current_profile_ - 1);
  updateSettings(true);
}

std::vector<std::string> ModdedApplication::getProfileNames() const
{
  return profile_names_;
}

void ModdedApplication::editProfile(int profile, const EditProfileInfo& info)
{
  if(profile < 0 || profile >= profile_names_.size())
    return;
  profile_names_[profile] = info.name;
  app_versions_[profile] = info.app_version;
  updateSettings(true);
}

void ModdedApplication::editTool(int tool_id, const Tool& new_tool)
{
  if(tool_id >= 0 && tool_id < tools_.size())
    tools_[tool_id] = new_tool;
  updateSettings(true);
}

std::tuple<int, std::string, std::string> ModdedApplication::verifyDeployerDirectories()
{
  std::tuple<int, std::string, std::string> ret{ 0, "", "" };
  for(const auto& depl : deployers_)
  {
    auto [cur_code, message] = depl->verifyDirectories();
    if(cur_code)
    {
      ret = { cur_code, depl->destPath(), message };
    }
  }
  return ret;
}

void ModdedApplication::addModToGroup(int mod_id,
                                      int group,
                                      std::optional<ProgressNode*> progress_node)
{
  if(group < 0 || group >= groups_.size() || group_map_.contains(mod_id))
    return;
  groups_[group].push_back(mod_id);
  group_map_[mod_id] = group;
  active_group_members_[group] = mod_id;
  ProgressNode node(progress_callback_);
  updateDeployerGroups(progress_node ? progress_node : &node);
  updateSettings(true);
}

void ModdedApplication::removeModFromGroup(int mod_id,
                                           bool update_conflicts,
                                           std::optional<ProgressNode*> progress_node)
{
  if(!group_map_.contains(mod_id))
    return;
  int group = group_map_[mod_id];
  groups_[group].erase(std::find(groups_[group].begin(), groups_[group].end(), mod_id));

  if(!groups_[group].empty())
  {
    active_group_members_[group] = groups_[group][0];
    std::vector<std::vector<int>> update_targets;
    std::vector<float> weights;
    for(int depl = 0; depl < deployers_.size(); depl++)
    {
      update_targets.push_back({});
      if(deployers_[depl]->isAutonomous())
        continue;
      for(int prof = 0; prof < profile_names_.size(); prof++)
      {
        deployers_[depl]->setProfile(prof);
        auto loadorder = deployers_[depl]->getLoadorder();
        auto iter = str::find_if(
          loadorder, [mod_id](const auto& tuple) { return std::get<0>(tuple) == mod_id; });
        if(iter != loadorder.end())
        {
          deployers_[depl]->addMod(active_group_members_[group], std::get<1>(*iter), false);
          deployers_[depl]->changeLoadorder(loadorder.size(), iter - loadorder.begin());
          update_targets[depl].push_back(prof);
          weights.push_back(loadorder.size());
        }
      }
      deployers_[depl]->setProfile(current_profile_);
    }

    ProgressNode node = progress_node ? **progress_node : ProgressNode(progress_callback_);
    if(!update_conflicts)
    {
      node.setTotalSteps(1);
      node.advance();
    }
    else
    {
      node.addChildren(weights);
      int i = 0;
      for(int depl = 0; depl < update_targets.size(); depl++)
      {
        for(int prof : update_targets[depl])
        {
          deployers_[depl]->setProfile(prof);
          deployers_[depl]->updateConflictGroups(&node.child(i));
          i++;
        }
        deployers_[depl]->setProfile(current_profile_);
      }
    }
  }

  if(groups_[group].size() == 1)
    group_map_.erase(groups_[group][0]);
  if(groups_[group].size() < 2)
  {
    groups_.erase(groups_.begin() + group);
    active_group_members_.erase(active_group_members_.begin() + group);
    for(auto& pair : group_map_)
    {
      if(pair.second > group)
        pair.second--;
    }
  }
  group_map_.erase(mod_id);
  updateSettings(true);
}

void ModdedApplication::createGroup(int first_mod_id,
                                    int second_mod_id,
                                    std::optional<ProgressNode*> progress_node)
{
  if(group_map_.contains(first_mod_id))
  {
    addModToGroup(second_mod_id, group_map_[first_mod_id]);
    return;
  }
  if(group_map_.contains(second_mod_id))
  {
    addModToGroup(first_mod_id, group_map_[second_mod_id]);
    return;
  }
  groups_.push_back({ first_mod_id, second_mod_id });
  int group = groups_.size() - 1;
  group_map_[first_mod_id] = group;
  group_map_[second_mod_id] = group;
  active_group_members_.push_back(first_mod_id);
  ProgressNode node(progress_callback_);
  updateDeployerGroups(progress_node ? progress_node : &node);
  updateSettings(true);
}

void ModdedApplication::changeActiveGroupMember(int group,
                                                int mod_id,
                                                std::optional<ProgressNode*> progress_node)
{
  if(group < 0 || group >= groups_.size() ||
     std::find(groups_[group].begin(), groups_[group].end(), mod_id) == groups_[group].end())
    return;
  active_group_members_[group] = mod_id;
  ProgressNode node(progress_callback_);
  updateDeployerGroups(progress_node ? progress_node : &node);
  updateSettings(true);
}

void ModdedApplication::changeModVersion(int mod_id, const std::string& new_version)
{
  auto iter = std::find_if(
    installed_mods_.begin(), installed_mods_.end(), [mod_id](Mod m) { return m.id == mod_id; });
  if(iter == installed_mods_.end())
    throw std::runtime_error("Error: Unknown mod id: " + std::to_string(mod_id));
  iter->version = new_version;
  updateSettings(true);
}

int ModdedApplication::getNumGroups()
{
  return groups_.size();
}

bool ModdedApplication::modHasGroup(int mod_id)
{
  return group_map_.contains(mod_id);
}

int ModdedApplication::getModGroup(int mod_id)
{
  if(!group_map_.contains(mod_id))
    return -1;
  return group_map_[mod_id];
}

void ModdedApplication::sortModsByConflicts(int deployer)
{
  ProgressNode node(progress_callback_);
  deployers_[deployer]->sortModsByConflicts(&node);
  updateSettings(true);
}

std::vector<std::vector<int>> ModdedApplication::getConflictGroups(int deployer)
{
  return deployers_[deployer]->getConflictGroups();
}

void ModdedApplication::updateModDeployers(const std::vector<int>& mod_ids,
                                           const std::vector<bool>& deployers)
{
  std::vector<float> weights;
  for(const auto& depl : deployers_)
    weights.push_back(depl->isAutonomous() ? 1 : depl->getNumMods());
  ProgressNode node(progress_callback_, weights);
  std::optional<ProgressNode*> dummy_node{};
  for(int i = 0; i < mod_ids.size(); i++)
  {
    const int mod_id = mod_ids[i];
    const bool is_last_mod = i == (mod_ids.size() - 1);
    for(int depl = 0; depl < deployers.size(); depl++)
    {
      if(deployers_[depl]->isAutonomous())
        continue;
      if(deployers[depl])
        addModToDeployer(depl, mod_id, is_last_mod, is_last_mod ? &node.child(depl) : dummy_node);
      else
        removeModFromDeployer(
          depl, mod_id, is_last_mod, is_last_mod ? &node.child(depl) : dummy_node);
    }
  }
}

int ModdedApplication::verifyStagingDir(sfs::path staging_dir)
{
  try
  {
    Json::Value val;
    std::ifstream file(staging_dir / CONFIG_FILE_NAME, std::fstream::binary);
    if(file.is_open())
      file >> val;
    file.close();
  }
  catch(std::ios_base::failure& f)
  {
    return 1;
  }
  catch(Json::RuntimeError& e)
  {
    return 2;
  }
  return 0;
}

DeployerInfo ModdedApplication::getDeployerInfo(int deployer)
{
  if(!(deployers_[deployer]->isAutonomous()))
  {
    std::map<std::string, int> mods_per_tag;
    for(const auto& tag : manual_tags_)
      mods_per_tag[tag.getName()] = tag.getNumMods();

    const auto loadorder = deployers_[deployer]->getLoadorder();
    std::vector<std::string> mod_names;
    mod_names.reserve(loadorder.size());
    std::vector<std::vector<std::string>> manual_tags;
    manual_tags.reserve(loadorder.size());
    std::vector<std::vector<std::string>> auto_tags;
    manual_tags.reserve(loadorder.size());
    for(const auto& [id, e] : loadorder)
    {
      mod_names.push_back(
        std::ranges::find_if(installed_mods_, [id = id](auto& mod) { return mod.id == id; })->name);
      if(manual_tag_map_.contains(id))
        manual_tags.push_back(manual_tag_map_.at(id));
      else
        manual_tags.push_back({});

      if(auto_tag_map_.contains(id))
        auto_tags.push_back(auto_tag_map_.at(id));
      else
        auto_tags.push_back({});
    }
    for(const auto& tag : auto_tags_)
    {
      if(mods_per_tag.contains(tag.getName()))
        mods_per_tag[tag.getName()] += tag.getNumMods();
      else
        mods_per_tag[tag.getName()] = tag.getNumMods();
    }
    return { mod_names,
             loadorder,
             deployers_[deployer]->getConflictGroups(),
             false,
             manual_tags,
             auto_tags,
             mods_per_tag,
             false,
             false,
             deployers_[deployer]->supportsSorting(),
             deployers_[deployer]->supportsReordering(),
             deployers_[deployer]->supportsModConflicts(),
             deployers_[deployer]->supportsFileConflicts(),
             deployers_[deployer]->supportsFileBrowsing(),
             deployers_[deployer]->getType(),
             deployers_[deployer]->idsAreSourceReferences(),
             {},
             deployers_[deployer]->getModActions(),
             deployers_[deployer]->getValidModActions(),
             deployers_[deployer]->getEnableUnsafeSorting() };
  }
  else
  {
    const auto loadorder = deployers_[deployer]->getLoadorder();
    std::vector<std::string> mod_names;
    if(deployers_[deployer]->idsAreSourceReferences())
    {
      mod_names.reserve(loadorder.size());
      for(const auto& [id, _] : loadorder)
      {
        if(id == -1)
        {
          mod_names.push_back("Vanilla");
          continue;
        }
        auto iter =
          std::ranges::find_if(installed_mods_, [id = id](auto& mod) { return mod.id == id; });
        if(iter == installed_mods_.end())
          mod_names.push_back("Vanilla");
        else
          mod_names.push_back(iter->name);
      }
    }
    bool separate_dirs = false;
    bool has_ignored_files = false;
    if(deployers_[deployer]->getType() == DeployerFactory::REVERSEDEPLOYER)
    {
      auto depl = static_cast<ReverseDeployer*>(deployers_[deployer].get());
      separate_dirs = depl->usesSeparateDirs();
      has_ignored_files = depl->getNumIgnoredFiles() != 0;
    }
    return { deployers_[deployer]->getModNames(),
             deployers_[deployer]->getLoadorder(),
             deployers_[deployer]->getConflictGroups(),
             true,
             {},
             deployers_[deployer]->getAutoTags(),
             deployers_[deployer]->getAutoTagMap(),
             separate_dirs,
             has_ignored_files,
             deployers_[deployer]->supportsSorting(),
             deployers_[deployer]->supportsReordering(),
             deployers_[deployer]->supportsModConflicts(),
             deployers_[deployer]->supportsFileConflicts(),
             deployers_[deployer]->supportsFileBrowsing(),
             deployers_[deployer]->getType(),
             deployers_[deployer]->idsAreSourceReferences(),
             mod_names,
             deployers_[deployer]->getModActions(),
             deployers_[deployer]->getValidModActions(),
             deployers_[deployer]->getEnableUnsafeSorting() };
  }
}

void ModdedApplication::setLog(const std::function<void(Log::LogLevel, const std::string&)>& newLog)
{
  log_ = newLog;
  for(auto& deployer : deployers_)
    deployer->setLog(newLog);
}

void ModdedApplication::addBackupTarget(const sfs::path& path,
                                        const std::string& name,
                                        const std::vector<std::string>& backup_names)
{
  bak_man_.addTarget(path, name, backup_names);
  updateSettings(true);
}

void ModdedApplication::removeBackupTarget(int target_id)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets())
    return;
  bak_man_.removeTarget(target_id);
  updateSettings(true);
}

void ModdedApplication::removeAllBackupTargets()
{
  for(int target = 0; target < bak_man_.getNumTargets(); target++)
    removeBackupTarget(target);
}

void ModdedApplication::addBackup(int target_id, const std::string& name, int source)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets())
    return;
  bak_man_.addBackup(target_id, name, source);
}

void ModdedApplication::removeBackup(int target_id, int backup_id)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets() || backup_id < 0 ||
     backup_id >= bak_man_.getNumBackups(target_id))
    return;
  bak_man_.removeBackup(target_id, backup_id);
}

void ModdedApplication::setActiveBackup(int target_id, int backup_id)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets() || backup_id < 0 ||
     backup_id >= bak_man_.getNumBackups(target_id))
    return;
  bak_man_.setActiveBackup(target_id, backup_id);
}

std::vector<BackupTarget> ModdedApplication::getBackupTargets() const
{
  return bak_man_.getTargets();
}

void ModdedApplication::setBackupName(int target_id, int backup_id, const std::string& name)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets() || backup_id < 0 ||
     backup_id >= bak_man_.getNumBackups(target_id))
    return;
  bak_man_.setBackupName(target_id, backup_id, name);
}

void ModdedApplication::setBackupTargetName(int target_id, const std::string& name)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets())
    return;
  bak_man_.setBackupTargetName(target_id, name);
}

void ModdedApplication::overwriteBackup(int target_id, int source_backup, int dest_backup)
{
  if(target_id < 0 || target_id >= bak_man_.getNumTargets())
    return;
  bak_man_.overwriteBackup(target_id, source_backup, dest_backup);
}

void ModdedApplication::cleanupFailedInstallation()
{
  Installer::cleanupFailedInstallation(staging_dir_, last_mod_id_);
  auto iter = std::find_if(installed_mods_.begin(),
                           installed_mods_.end(),
                           [this](const Mod& m) { return m.id == this->last_mod_id_; });
  if(iter != installed_mods_.end())
    uninstallMods({ last_mod_id_ });
  last_mod_id_ = -1;
}

void ModdedApplication::setProgressCallback(const std::function<void(float)>& progress_callback)
{
  progress_callback_ = progress_callback;
}

void ModdedApplication::uninstallGroupMembers(const std::vector<int>& mod_ids)
{
  std::vector<int> uninstall_targets;
  for(int active_id : mod_ids)
  {
    if(!group_map_.contains(active_id))
      continue;
    for(int mod_id : groups_[group_map_[active_id]])
    {
      if(mod_id != active_id)
        uninstall_targets.push_back(mod_id);
    }
  }
  uninstallMods(uninstall_targets);
}

void ModdedApplication::addManualTag(const std::string& tag_name)
{
  if(str::find(manual_tags_, tag_name) != manual_tags_.end())
    throw std::runtime_error(
      std::format("Error: A tag with the name '{}' already exists.", tag_name));
  manual_tags_.emplace_back(tag_name);
  updateSettings(true);
}

void ModdedApplication::removeManualTag(const std::string& tag_name, bool update_map)
{
  auto iter = str::find(manual_tags_, tag_name);
  if(iter != manual_tags_.end())
    manual_tags_.erase(iter);
  if(update_map)
    updateManualTagMap();
  updateSettings(true);
}

void ModdedApplication::changeManualTagName(const std::string& old_name,
                                            const std::string& new_name,
                                            bool update_map)
{
  auto old_iter = str::find(manual_tags_, old_name);
  if(old_iter == manual_tags_.end())
    return;
  auto new_iter = str::find(manual_tags_, new_name);
  if(new_iter != manual_tags_.end())
    throw std::runtime_error(
      std::format("Error: Cannot rename tag '{}', because a tag with the name '{}' already exists.",
                  old_name,
                  new_name));
  old_iter->setName(new_name);
  if(update_map)
    updateManualTagMap();
  updateSettings(true);
}

void ModdedApplication::addTagsToMods(const std::vector<std::string>& tag_names,
                                      const std::vector<int>& mod_ids)
{
  for(const auto& tag_name : tag_names)
  {
    auto tag = str::find(manual_tags_, tag_name);
    if(tag == manual_tags_.end())
      return;
    for(int mod : mod_ids)
      tag->addMod(mod);
  }
  updateManualTagMap();
  updateSettings(true);
}

void ModdedApplication::removeTagsFromMods(const std::vector<std::string>& tag_names,
                                           const std::vector<int>& mod_ids)
{
  for(const auto& tag_name : tag_names)
  {
    auto tag = str::find(manual_tags_, tag_name);
    if(tag == manual_tags_.end())
      return;
    for(int mod : mod_ids)
      tag->removeMod(mod);
  }
  updateManualTagMap();
  updateSettings(true);
}

void ModdedApplication::setTagsForMods(const std::vector<std::string>& tag_names,
                                       const std::vector<int> mod_ids)
{
  for(auto& tag : manual_tags_)
  {
    if(str::find(tag_names, tag) != tag_names.end())
    {
      for(int mod : mod_ids)
        tag.addMod(mod);
    }
    else
    {
      for(int mod : mod_ids)
        tag.removeMod(mod);
    }
  }
  updateManualTagMap();
  updateSettings(true);
}

void ModdedApplication::editManualTags(const std::vector<EditManualTagAction>& actions)
{
  auto old_tags = manual_tags_;
  try
  {
    for(const auto& action : actions)
    {
      if(action.getType() == EditManualTagAction::ActionType::add)
        addManualTag(action.getName());
      else if(action.getType() == EditManualTagAction::ActionType::remove)
        removeManualTag(action.getName(), false);
      else if(action.getType() == EditManualTagAction::ActionType::rename)
        changeManualTagName(action.getName(), action.getNewName(), false);
    }
  }
  catch(std::runtime_error& e)
  {
    manual_tags_ = old_tags;
    throw e;
  }
  updateManualTagMap();
  updateSettings(true);
}

void ModdedApplication::addAutoTag(const std::string& tag_name,
                                   const std::string& expression,
                                   const std::vector<TagCondition>& conditions,
                                   bool update)
{
  if(std::find(auto_tags_.begin(), auto_tags_.end(), tag_name) != auto_tags_.end())
    throw std::runtime_error(
      std::format("Error: A tag with the name '{}' already exists.", tag_name));

  auto_tags_.emplace_back(tag_name, expression, conditions);
  auto select_id = [](const auto& mod) { return mod.id; };
  if(expression != "")
    auto_tags_.back().reapplyMods(staging_dir_, str::transform_view(installed_mods_, select_id));
  if(update)
  {
    updateAutoTagMap();
    updateSettings(true);
  }
}

void ModdedApplication::addAutoTag(const Json::Value& json_tag, bool update)
{
  if(std::find(auto_tags_.begin(), auto_tags_.end(), json_tag["name"].asString()) !=
     auto_tags_.end())
    throw std::runtime_error(
      std::format("Error: A tag with the name '{}' already exists.", json_tag["name"].asString()));

  auto_tags_.emplace_back(json_tag);
  auto select_id = [](const auto& mod) { return mod.id; };
  if(json_tag["expression"].asString() != "")
    auto_tags_.back().reapplyMods(staging_dir_, str::transform_view(installed_mods_, select_id));
  if(update)
  {
    updateAutoTagMap();
    updateSettings(true);
  }
}

void ModdedApplication::removeAutoTag(const std::string& tag_name, bool update)
{
  auto iter = std::find(auto_tags_.begin(), auto_tags_.end(), tag_name);
  if(iter == auto_tags_.end())
    return;
  auto_tags_.erase(iter);
  if(update)
  {
    updateAutoTagMap();
    updateSettings(true);
  }
}

void ModdedApplication::renameAutoTag(const std::string& old_name,
                                      const std::string& new_name,
                                      bool update)
{
  auto iter = std::find(auto_tags_.begin(), auto_tags_.end(), old_name);
  if(iter == auto_tags_.end())
    return;
  if(std::find(auto_tags_.begin(), auto_tags_.end(), new_name) != auto_tags_.end())
    throw std::runtime_error(
      std::format("Error: Cannot rename tag '{}', because a tag with the name '{}' already exists.",
                  old_name,
                  new_name));

  iter->setName(new_name);
  if(update)
  {
    updateAutoTagMap();
    updateSettings(true);
  }
}

void ModdedApplication::changeAutoTagEvaluator(const std::string& tag_name,
                                               const std::string& expression,
                                               const std::vector<TagCondition>& conditions,
                                               bool update)
{
  auto iter = std::find(auto_tags_.begin(), auto_tags_.end(), tag_name);
  if(iter == auto_tags_.end())
    return;

  iter->setEvaluator(expression, conditions);
  auto select_id = [](const auto& mod) { return mod.id; };
  if(update)
  {
    iter->reapplyMods(staging_dir_, str::transform_view(installed_mods_, select_id));
    updateAutoTagMap();
    updateSettings(true);
  }
}

void ModdedApplication::editAutoTags(const std::vector<EditAutoTagAction>& actions)
{
  auto old_tags = auto_tags_;
  try
  {
    std::vector<std::string> reapply_targets;
    for(const auto& action : actions)
    {
      if(action.getType() == EditAutoTagAction::ActionType::add)
        addAutoTag(action.getName(), action.getExpression(), action.getConditions(), false);
      else if(action.getType() == EditAutoTagAction::ActionType::remove)
        removeAutoTag(action.getName(), false);
      else if(action.getType() == EditAutoTagAction::ActionType::rename)
        renameAutoTag(action.getName(), action.getNewName(), false);
      else if(action.getType() == EditAutoTagAction::ActionType::change_evaluator)
      {
        changeAutoTagEvaluator(
          action.getName(), action.getExpression(), action.getConditions(), false);
        reapply_targets.push_back(action.getName());
      }
    }
    if(!reapply_targets.empty())
    {
      log_(Log::LOG_INFO, "Reapplying auto tags with edited conditions to all mods...");
      ProgressNode node(progress_callback_);
      node.addChildren({ 1.0f, std::min(8.0f, (float)reapply_targets.size()) });
      node.child(0).setTotalSteps(installed_mods_.size());
      std::vector<float> weights;
      for(const auto& tag : reapply_targets)
      {
        auto iter = std::find(auto_tags_.begin(), auto_tags_.end(), tag);
        if(iter != auto_tags_.end())
          weights.push_back(iter->getNumConditions());
      }
      node.child(1).addChildren(weights);
      for(int i = 0; i < weights.size(); i++)
        node.child(1).child(i).setTotalSteps(installed_mods_.size());

      auto select_id = [](const auto& mod) { return mod.id; };
      auto mods = str::transform_view(installed_mods_, select_id);
      const auto files = AutoTag::readModFiles(staging_dir_, mods, &node.child(0));
      for(int i = 0; i < reapply_targets.size(); i++)
      {
        auto iter = std::find(auto_tags_.begin(), auto_tags_.end(), reapply_targets[i]);
        if(iter != auto_tags_.end())
          iter->reapplyMods(files, mods, &node.child(1).child(i));
      }
    }
  }
  catch(std::runtime_error& e)
  {
    auto_tags_ = old_tags;
    throw e;
  }
  updateAutoTagMap();
  updateSettings(true);
}

void ModdedApplication::reapplyAutoTags()
{
  log_(Log::LOG_INFO, "Reapplying auto tags to all mods...");
  ProgressNode node(progress_callback_);
  node.addChildren({ 1.0f, 8.0f });
  node.child(0).setTotalSteps(installed_mods_.size());
  std::vector<float> weights;
  for(auto& tag : auto_tags_)
    weights.push_back(tag.getNumConditions());
  node.child(1).addChildren(weights);
  for(int i = 0; i < weights.size(); i++)
    node.child(1).child(i).setTotalSteps(installed_mods_.size());
  auto select_id = [](const auto& mod) { return mod.id; };
  auto mods = str::transform_view(installed_mods_, select_id);
  const auto files = AutoTag::readModFiles(staging_dir_, mods, &node.child(0));
  for(int i = 0; i < auto_tags_.size(); i++)
    auto_tags_[i].reapplyMods(files, mods, &node.child(1).child(i));
  updateAutoTagMap();
  updateSettings(true);
}

void ModdedApplication::updateAutoTags(const std::vector<int> mod_ids)
{
  log_(Log::LOG_INFO, std::format("Reapplying auto tags to {} mods...", mod_ids.size()));
  ProgressNode node(progress_callback_);
  node.addChildren(
    { 1.0f, std::max(1.0f, 8.0f * (float)mod_ids.size() / (float)installed_mods_.size()) });
  node.child(0).setTotalSteps(mod_ids.size());
  std::vector<float> weights;
  for(auto& tag : auto_tags_)
    weights.push_back(tag.getNumConditions());
  node.child(1).addChildren(weights);
  for(int i = 0; i < weights.size(); i++)
    node.child(1).child(i).setTotalSteps(mod_ids.size());
  const auto files = AutoTag::readModFiles(staging_dir_, mod_ids, &node.child(0));
  for(int i = 0; i < auto_tags_.size(); i++)
    auto_tags_[i].updateMods(files, mod_ids, &node.child(1).child(i));
  updateAutoTagMap();
  updateSettings(true);
}

void ModdedApplication::deleteAllData()
{
  for(int i = 0; i < deployers_.size(); i++)
    removeDeployer(i, true);
  for(const auto& mod : installed_mods_)
    sfs::remove_all(staging_dir_ / std::to_string(mod.id));
  sfs::remove(staging_dir_ / CONFIG_FILE_NAME);
  sfs::remove_all(getDownloadDir());
}

void ModdedApplication::setAppVersion(const std::string& app_version)
{
  app_versions_[current_profile_] = app_version;
  updateSettings(true);
}

void ModdedApplication::setModSources(int mod_id,
                                      const std::string& local_source,
                                      const std::string& remote_source)
{
  auto iter = std::find_if(
    installed_mods_.begin(), installed_mods_.end(), [mod_id](Mod m) { return m.id == mod_id; });
  if(iter == installed_mods_.end())
    throw std::runtime_error("Error: Unknown mod id: " + std::to_string(mod_id));
  iter->local_source = local_source;
  iter->remote_source = remote_source;
  updateSettings(true);
}

nexus::Page ModdedApplication::getNexusPage(int mod_id)
{
  auto iter = std::find_if(
    installed_mods_.begin(), installed_mods_.end(), [mod_id](Mod m) { return m.id == mod_id; });
  if(iter == installed_mods_.end())
    throw std::runtime_error("Error: Unknown mod id: " + std::to_string(mod_id));
  return nexus::Api::getNexusPage(iter->remote_source);
}

void ModdedApplication::checkForModUpdates()
{
  std::vector<int> target_mod_indices;
  for(const auto& [i, mod] : str::enumerate_view(installed_mods_))
  {
    if(nexus::Api::modUrlIsValid(mod.remote_source) && mod.remote_update_time <= mod.install_time)
      target_mod_indices.push_back(i);
  }
  performUpdateCheck(target_mod_indices);
}

void ModdedApplication::checkModsForUpdates(const std::vector<int>& mod_ids)
{
  std::vector<int> target_mod_indices;
  for(const auto& [i, mod] : str::enumerate_view(installed_mods_))
  {
    if(str::find(mod_ids, mod.id) != mod_ids.end() &&
       nexus::Api::modUrlIsValid(mod.remote_source) && mod.remote_update_time <= mod.install_time)
      target_mod_indices.push_back(i);
  }
  performUpdateCheck(target_mod_indices);
}

void ModdedApplication::suppressUpdateNotification(const std::vector<int>& mod_ids)
{
  for(int mod_id : mod_ids)
  {
    auto iter = std::find_if(installed_mods_.begin(),
                             installed_mods_.end(),
                             [mod_id](const Mod& mod) { return mod.id == mod_id; });
    if(iter != installed_mods_.end() && iter->remote_update_time > iter->install_time)
      iter->suppress_update_time =
        std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
  }
  updateSettings(true);
}

ExternalChangesInfo ModdedApplication::getExternalChanges(int deployer)
{
  ExternalChangesInfo info;
  ProgressNode node(progress_callback_);
  info.file_changes = deployers_[deployer]->getExternallyModifiedFiles({ &node });
  info.deployer_id = deployer;
  info.deployer_name = deployers_[deployer]->getName();
  return info;
}

void ModdedApplication::keepOrRevertFileModifications(
  int deployer,
  const FileChangeChoices& changes_to_keep) const
{
  deployers_[deployer]->keepOrRevertFileModifications(changes_to_keep);
}

void ModdedApplication::fixInvalidHardLinkDeployers()
{
  for(auto& depl : deployers_)
    depl->fixInvalidLinkDeployMode();
}

void ModdedApplication::exportConfiguration(const std::vector<int>& deployers,
                                            const std::vector<std::string>& auto_tags)
{
  Json::Value json;
  json["name"] = name_;

  int i = 0;
  for(int deployer_id : deployers)
  {
    if(deployer_id < 0 || deployer_id >= deployers_.size())
      continue;

    const auto& deployer = deployers_[deployer_id];
    json["deployers"][i]["type"] = deployer->getType();
    json["deployers"][i]["name"] = deployer->getName();
    json["deployers"][i]["target_dir"] = generalizeSteamPath(deployer->getDestPath());
    if(deployer->isAutonomous())
      json["deployers"][i]["source_dir"] = generalizeSteamPath(deployer->getSourcePath());
    // use hard link by default; import will auto change this to sym link when needed
    json["deployers"][i]["deploy_mode"] =
      deployer->getDeployMode() == Deployer::copy ? "copy" : "hard_link";
    if(deployer->getType() == DeployerFactory::REVERSEDEPLOYER)
    {
      auto rev_depl = static_cast<ReverseDeployer*>(deployer.get());
      json["deployers"][i]["uses_separate_dirs"] = rev_depl->usesSeparateDirs();
      json["deployers"][i]["update_ignore_list"] = true;
    }
    i++;
  }

  i = 0;
  for(const auto& tag : auto_tags)
  {
    auto iter = str::find_if(auto_tags_, [name = tag](auto tag) { return tag.getName() == name; });
    if(iter == auto_tags_.end())
      continue;

    json["auto_tags"][i] = iter->toJson();
    json["auto_tags"][i].removeMember("mod_ids");
    i++;
  }

  sfs::path path = staging_dir_ / (export_file_name + ".json");
  if(pu::exists(path))
  {
    i = 1;
    do
      path = staging_dir_ / (export_file_name + std::format("_{}.json", i++));
    while(pu::exists(path));
  }
  log_(Log::LOG_INFO,
       std::format("Exporting configuration for '{}' to '{}'", name_, path.string()));
  std::ofstream file(path, std::fstream::binary);
  file << json;
}

void ModdedApplication::updateIgnoredFiles(int deployer)
{
  if(deployers_[deployer]->getType() != DeployerFactory::REVERSEDEPLOYER)
  {
    log_(Log::LOG_DEBUG, "Ignored files can only be updated for ReverseDeployers.");
    return;
  }
  auto depl = static_cast<ReverseDeployer*>(deployers_[deployer].get());
  depl->updateIgnoredFiles(true);
}

void ModdedApplication::addModToIgnoreList(int deployer, int mod_id)
{
  if(deployers_[deployer]->getType() != DeployerFactory::REVERSEDEPLOYER)
  {
    log_(Log::LOG_DEBUG, "Ignored files can only be updated for ReverseDeployers.");
    return;
  }
  auto depl = static_cast<ReverseDeployer*>(deployers_[deployer].get());
  depl->addModToIgnoreList(mod_id);
}

void ModdedApplication::applyModAction(int deployer, int action, int mod_id)
{
  deployers_[deployer]->applyModAction(action, mod_id);
  updateSettings(true);
}

std::filesystem::path ModdedApplication::getDownloadDir() const
{
  return staging_dir_ / DOWNLOAD_DIR;
}

sfs::path ModdedApplication::iconPath() const
{
  return icon_path_;
}

void ModdedApplication::setIconPath(const sfs::path& icon_path)
{
  icon_path_ = icon_path;
  updateSettings(true);
}

void ModdedApplication::updateSettings(bool write)
{
  json_settings_.clear();
  json_settings_["name"] = name_;
  json_settings_["command"] = command_;
  json_settings_["icon_path"] = icon_path_.string();
  for(int group = 0; group < groups_.size(); group++)
  {
    json_settings_["groups"][group]["active_member"] = active_group_members_[group];
    for(int i = 0; i < groups_[group].size(); i++)
    {
      json_settings_["groups"][group]["members"][i] = groups_[group][i];
    }
  }

  for(int i = 0; i < profile_names_.size(); i++)
    json_settings_["profiles"][i]["name"] = profile_names_[i];

  for(int i = 0; i < app_versions_.size(); i++)
    json_settings_["profiles"][i]["app_version"] = app_versions_[i];

  for(int i = 0; i < installed_mods_.size(); i++)
  {
    json_settings_["installed_mods"][i] = installed_mods_[i].toJson();
    json_settings_["installed_mods"][i]["installer"] = installer_map_[installed_mods_[i].id];
  }

  for(int depl = 0; depl < deployers_.size(); depl++)
  {
    json_settings_["deployers"][depl]["dest_path"] = deployers_[depl]->getDestPath();
    if(deployers_[depl]->isAutonomous())
      json_settings_["deployers"][depl]["source_path"] = deployers_[depl]->sourcePath().string();
    else
      json_settings_["deployers"][depl]["source_path"] = staging_dir_.string();
    json_settings_["deployers"][depl]["name"] = deployers_[depl]->getName();
    json_settings_["deployers"][depl]["type"] = deployers_[depl]->getType();
    json_settings_["deployers"][depl]["deploy_mode"] = deployers_[depl]->getDeployMode();
    json_settings_["deployers"][depl]["enable_unsafe_sorting"] =
      deployers_[depl]->getEnableUnsafeSorting();

    if(!deployers_[depl]->isAutonomous())
    {
      for(int prof = 0; prof < profile_names_.size(); prof++)
      {
        deployers_[depl]->setProfile(prof);
        json_settings_["deployers"][depl]["profiles"][prof]["name"] = profile_names_[prof];
        auto loadorder = deployers_[depl]->getLoadorder();
        for(int mod = 0; mod < loadorder.size(); mod++)
        {
          json_settings_["deployers"][depl]["profiles"][prof]["loadorder"][mod]["id"] =
            std::get<0>(loadorder[mod]);
          json_settings_["deployers"][depl]["profiles"][prof]["loadorder"][mod]["enabled"] =
            std::get<1>(loadorder[mod]);
        }
        auto conflict_groups = deployers_[depl]->getConflictGroups();
        for(int group = 0; group < conflict_groups.size(); group++)
        {
          for(int i = 0; i < conflict_groups[group].size(); i++)
            json_settings_["deployers"][depl]["profiles"][prof]["conflict_groups"][group][i] =
              conflict_groups[group][i];
        }
      }
    }
    deployers_[depl]->setProfile(current_profile_);
  }

  for(int tool = 0; tool < tools_.size(); tool++)
    json_settings_["tools"][tool] = tools_[tool].toJson();

  const auto targets = bak_man_.getTargets();
  for(int i = 0; i < targets.size(); i++)
    json_settings_["backup_targets"][i]["path"] = targets[i].path.string();

  for(int i = 0; i < manual_tags_.size(); i++)
    json_settings_["manual_tags"][i] = manual_tags_[i].toJson();

  for(int i = 0; i < auto_tags_.size(); i++)
  {
    if(!auto_tags_[i].getExpression().empty())
      json_settings_["auto_tags"][i] = auto_tags_[i].toJson();
  }

  if(write)
    writeSettings();
}

void ModdedApplication::writeSettings() const
{
  sfs::path settings_file_path = staging_dir_ / (CONFIG_FILE_NAME + ".tmp");
  std::ofstream file(settings_file_path, std::fstream::binary);
  if(!file.is_open())
    throw std::runtime_error("Error: Could not write to \"" + settings_file_path.string() + "\".");
  file << json_settings_;
  file.close();
  sfs::rename(settings_file_path, staging_dir_ / CONFIG_FILE_NAME);
}

void ModdedApplication::readSettings()
{
  json_settings_.clear();
  sfs::path settings_file_path = staging_dir_ / CONFIG_FILE_NAME;
  std::ifstream file(settings_file_path, std::fstream::binary);
  if(!file.is_open())
    throw std::runtime_error("Error: Could not read from \"" + settings_file_path.string() + "\".");
  file >> json_settings_;
  file.close();
}

void ModdedApplication::updateState(bool read)
{
  installed_mods_.clear();
  deployers_.clear();
  groups_.clear();
  group_map_.clear();
  active_group_members_.clear();
  profile_names_.clear();
  bak_man_.reset();
  tools_.clear();
  profile_names_.clear();
  app_versions_.clear();
  manual_tags_.clear();
  manual_tag_map_.clear();
  auto_tags_.clear();
  auto_tag_map_.clear();
  installer_map_.clear();

  if(read)
  {
    if(!sfs::exists(staging_dir_ / CONFIG_FILE_NAME))
      return;
    readSettings();
  }

  if(!json_settings_.isMember("name"))
    throw ParseError("Name is missing in \"" + (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");
  name_ = json_settings_["name"].asString();

  if(!json_settings_.isMember("command"))
    throw ParseError("Command is missing in \"" + (staging_dir_ / CONFIG_FILE_NAME).string() +
                     "\"");
  command_ = json_settings_["command"].asString();

  if(!json_settings_.isMember("icon_path"))
    throw ParseError("Icon path is missing in \"" + (staging_dir_ / CONFIG_FILE_NAME).string() +
                     "\"");
  icon_path_ = json_settings_["icon_path"].asString();

  if(!json_settings_.isMember("profiles"))
    throw ParseError("Profiles are missing in \"" + (staging_dir_ / CONFIG_FILE_NAME).string() +
                     "\"");

  Json::Value profiles = json_settings_["profiles"];
  for(int i = 0; i < profiles.size(); i++)
  {
    profile_names_.push_back(profiles[i]["name"].asString());
    app_versions_.push_back(profiles[i]["app_version"].asString());
  }

  Json::Value installed_mods = json_settings_["installed_mods"];
  for(int i = 0; i < installed_mods.size(); i++)
  {
    installed_mods_.emplace_back(installed_mods[i]);
    std::string installer = installed_mods[i]["installer"].asString();
    std::vector<std::string> types = Installer::INSTALLER_TYPES;
    if(std::find(types.begin(), types.end(), installer) == types.end())
      throw ParseError("Unknown installer type: " + installer + " in \"" +
                       (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");
    installer_map_[installed_mods[i]["id"].asInt()] = installer;
  }
  Json::Value groups = json_settings_["groups"];
  for(int group = 0; group < groups.size(); group++)
  {
    groups_.push_back(std::vector<int>{});
    for(int i = 0; i < groups[group]["members"].size(); i++)
    {
      int mod_id = groups[group]["members"][i].asInt();
      if(std::find_if(installed_mods_.begin(),
                      installed_mods_.end(),
                      [mod_id](const Mod& m) { return m.id == mod_id; }) == installed_mods_.end())
        throw ParseError("Unknown mod id in group " + std::to_string(group) + ": " +
                         std::to_string(mod_id) + " in \"" +
                         (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");
      if(std::find(groups_[group].begin(), groups_[group].end(), mod_id) != groups_[group].end())
        throw ParseError("Duplicate mod id in group " + std::to_string(group) + ": " +
                         std::to_string(mod_id) + " in \"" +
                         (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");
      group_map_[mod_id] = group;
      groups_[group].push_back(mod_id);
    }
    int active_member = groups[group]["active_member"].asInt();
    if(std::find(groups_[group].begin(), groups_[group].end(), active_member) ==
         groups_[group].end() ||
       !groups[group].isMember("active_member"))
      throw ParseError("Invalid active group member: " + std::to_string(active_member) + " in \"" +
                       (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");
    active_group_members_.push_back(groups[group]["active_member"].asInt());
  }
  Json::Value deployers = json_settings_["deployers"];
  for(int depl = 0; depl < deployers.size(); depl++)
  {
    std::vector<std::string> types = DeployerFactory::DEPLOYER_TYPES;
    std::string type = deployers[depl]["type"].asString();
    if(std::find(types.begin(), types.end(), type) == types.end())
      throw ParseError("Unknown deployer type: " + type + " in \"" +
                       (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");

    Deployer::DeployMode deploy_mode = Deployer::hard_link;
    if(deployers[depl].isMember("use_copy_deployment"))
      deploy_mode =
        deployers[depl]["use_copy_deployment"].asBool() ? Deployer::copy : Deployer::hard_link;
    else
      deploy_mode = static_cast<Deployer::DeployMode>(deployers[depl]["deploy_mode"].asInt());
    deployers_.push_back(
      DeployerFactory::makeDeployer(type,
                                    sfs::path(deployers[depl]["source_path"].asString()),
                                    sfs::path(deployers[depl]["dest_path"].asString()),
                                    deployers[depl]["name"].asString(),
                                    deploy_mode));
    if(deployers[depl].isMember("enable_unsafe_sorting"))
      deployers_.back()->setEnableUnsafeSorting(deployers[depl]["enable_unsafe_sorting"].asBool());

    if(!deployers_[depl]->isAutonomous())
    {
      for(int prof = 0; prof < profile_names_.size(); prof++)
      {
        deployers_[depl]->addProfile();
        deployers_[depl]->setProfile(prof);
        Json::Value loadorder = deployers[depl]["profiles"][prof]["loadorder"];
        for(int mod = 0; mod < loadorder.size(); mod++)
        {
          int mod_id = loadorder[mod]["id"].asInt();
          if(std::find_if(installed_mods_.begin(),
                          installed_mods_.end(),
                          [mod_id](const Mod& m)
                          { return m.id == mod_id; }) == installed_mods_.end())
            throw ParseError("Unknown mod id in deployers: " + std::to_string(mod_id) + " in \"" +
                             (staging_dir_ / CONFIG_FILE_NAME).string() + "\"");
          if(!group_map_.contains(mod_id) || active_group_members_[group_map_[mod_id]] == mod_id &&
                                               !(deployers_[depl]->isAutonomous()))
            deployers_[depl]->addMod(mod_id, loadorder[mod]["enabled"].asBool(), false);
        }
        Json::Value conflict_groups_json = deployers[depl]["profiles"][prof]["conflict_groups"];
        std::vector<std::vector<int>> conflict_groups;
        for(int group = 0; group < conflict_groups_json.size(); group++)
        {
          std::vector<int> new_group;
          for(int mod = 0; mod < conflict_groups_json[group].size(); mod++)
            new_group.push_back(conflict_groups_json[group][mod].asInt());
          conflict_groups.push_back(std::move(new_group));
        }
        deployers_[depl]->setConflictGroups(conflict_groups);
      }
    }
    if(type == DeployerFactory::REVERSEDEPLOYER)
    {
      if(deployers[depl].get("update_profiles", false).asBool())
      {
        json_settings_["deployers"][depl]["update_profiles"] = false;
        for(int i = 0; i < profile_names_.size(); i++)
          deployers_[depl]->addProfile();
      }
      auto rev_depl = static_cast<ReverseDeployer*>(deployers_[depl].get());
      if(rev_depl->getNumProfiles() != profile_names_.size())
        throw ParseError(std::format(
          "Mismatch in profile count for deployer '{}'. {} profiles found, expected {}.",
          rev_depl->getName(),
          rev_depl->getNumProfiles(),
          profile_names_.size()));
    }
    deployers_[depl]->setProfile(current_profile_);
  }
  Json::Value tools = json_settings_["tools"];
  for(int tool = 0; tool < tools.size(); tool++)
    tools_.emplace_back(tools[tool]);

  for(int prof = 0; prof < profile_names_.size(); prof++)
    bak_man_.addProfile();
  bak_man_.setProfile(current_profile_);
  Json::Value backup_targets = json_settings_["backup_targets"];
  for(int target = 0; target < backup_targets.size(); target++)
    bak_man_.addTarget(backup_targets[target]["path"].asString());
  bak_man_.setLog(log_);

  if(json_settings_.isMember("manual_tags"))
  {
    for(auto& tag_entry : json_settings_["manual_tags"])
    {
      if(str::find_if(manual_tags_,
                      [name = tag_entry["name"].asString()](auto tag)
                      { return tag.getName() == name; }) != manual_tags_.end())
        throw ParseError(
          std::format("Manual tag \"{}\" found more than once.", tag_entry["name"].asString()));
      manual_tags_.emplace_back(tag_entry);
    }
    updateManualTagMap();
  }

  if(json_settings_.isMember("auto_tags"))
  {
    for(auto& tag_entry : json_settings_["auto_tags"])
    {
      if(str::find_if(auto_tags_,
                      [name = tag_entry["name"].asString()](auto tag)
                      { return tag.getName() == name; }) != auto_tags_.end())
        throw ParseError(
          std::format("Auto tag \"{}\" found more than once.", tag_entry["name"].asString()));
      auto_tags_.emplace_back(tag_entry);
    }
    updateAutoTagMap();
  }

  updateSteamIconPath();
}

std::string ModdedApplication::getModName(int mod_id) const
{
  auto iter = std::find_if(
    installed_mods_.begin(), installed_mods_.end(), [mod_id](Mod m) { return m.id == mod_id; });
  if(iter == installed_mods_.end())
    return "";
  return iter->name;
}

void ModdedApplication::updateDeployerGroups(std::optional<ProgressNode*> progress_node)
{
  std::vector<std::vector<int>> update_targets;
  for(int depl = 0; depl < deployers_.size(); depl++)
  {
    update_targets.push_back({});
    if(deployers_[depl]->isAutonomous())
      continue;
    for(int profile = 0; profile < profile_names_.size(); profile++)
    {
      deployers_[depl]->setProfile(profile);
      std::vector<bool> completed_groups(active_group_members_.size());
      std::fill(completed_groups.begin(), completed_groups.end(), false);
      for(const auto& [mod_id, _] : deployers_[depl]->getLoadorder())
      {
        if(!group_map_.contains(mod_id))
          continue;
        const int group = group_map_[mod_id];
        if(!completed_groups[group])
        {
          completed_groups[group] = true;
          if(deployers_[depl]->swapMod(mod_id, active_group_members_[group]))
            update_targets[depl].push_back(profile);
        }
        else if(deployers_[depl]->removeMod(mod_id))
          update_targets[depl].push_back(profile);
      }
    }
    deployers_[depl]->setProfile(current_profile_);
  }
  if(progress_node)
  {
    std::vector<float> weights;
    for(int depl = 0; depl < update_targets.size(); depl++)
    {
      for(int profile : update_targets[depl])
      {
        deployers_[depl]->setProfile(profile);
        weights.push_back(deployers_[depl]->getNumMods());
      }
      deployers_[depl]->setProfile(current_profile_);
    }
    (*progress_node)->addChildren(weights);
  }
  int i = 0;
  for(int depl = 0; depl < update_targets.size(); depl++)
  {
    for(int profile : update_targets[depl])
    {
      deployers_[depl]->setProfile(profile);
      deployers_[depl]->updateConflictGroups(progress_node ? &(*progress_node)->child(i)
                                                           : std::optional<ProgressNode*>{});
      i++;
    }
    deployers_[depl]->setProfile(current_profile_);
  }
}

void ModdedApplication::splitMod(int mod_id, int deployer)
{
  if(deployers_[deployer]->isAutonomous())
    return;

  std::map<int, sfs::path> managed_sub_dirs;
  for(int i = 0; i < deployers_.size(); i++)
  {
    if(i == deployer || deployers_[i]->isAutonomous())
      continue;
    auto cur_depl_path = deployers_[i]->getDestPath();
    if(!cur_depl_path.ends_with("/"))
      cur_depl_path += "/";
    auto target_depl_path = deployers_[deployer]->getDestPath();
    if(!target_depl_path.ends_with("/"))
      target_depl_path += "/";
    const auto pos = cur_depl_path.find(target_depl_path);
    if(pos != std::string::npos)
    {
      std::string sub_dir = cur_depl_path.substr(pos + target_depl_path.size());
      if(sub_dir.starts_with("/"))
        sub_dir = sub_dir.substr(1);
      managed_sub_dirs[i] = sub_dir;
    }
  }
  if(managed_sub_dirs.empty())
    return;

  for(const auto& [depl, dir] : managed_sub_dirs)
  {
    const auto mod_dir_optional =
      pu::pathExists(dir,
                     staging_dir_ / std::to_string(mod_id),
                     deployers_[deployer]->getType() == DeployerFactory::CASEMATCHINGDEPLOYER);
    if(!mod_dir_optional)
      continue;
    const auto mod_dir = staging_dir_ / std::to_string(mod_id) / mod_dir_optional->string();

    ImportModInfo info;
    info.deployers = { depl };
    info.target_group_id = -1;
    auto iter =
      str::find_if(installed_mods_, [mod_id](const auto& mod) { return mod.id == mod_id; });
    if(iter == installed_mods_.end())
      throw std::runtime_error(std::format("Invalid mod id {}", mod_id));
    info.name = iter->name + " [" + deployers_[depl]->getName() + "]";
    info.version = iter->version;
    info.installer = Installer::SIMPLEINSTALLER;
    info.installer_flags = Installer::Flag::preserve_case | Installer::Flag::preserve_directories;
    info.files = {};
    info.root_level = 0;
    info.current_path = mod_dir;
    info.local_source = iter->local_source;
    info.remote_source = iter->remote_source;
    info.remote_mod_id = iter->remote_mod_id;
    info.remote_file_id = iter->remote_file_id;
    info.remote_type = iter->remote_type;

    log_(
      Log::LOG_WARNING,
      std::format(
        "Mod '{}' has been split because it contains" " a sub-directory managed by deployer '{}'.",
        iter->name,
        deployers_[depl]->getName()));
    installMod(info);
    sfs::remove_all(mod_dir);
  }
}

void ModdedApplication::replaceMod(const ImportModInfo& info)
{
  if(!info.replace_mod || info.target_group_id == -1)
  {
    installMod(info);
    return;
  }
  auto index =
    str::find_if(installed_mods_, [group = info.target_group_id](const Mod& m) { return m.id == group; });
  if(index == installed_mods_.end())
    throw std::runtime_error(std::format("Invalid group '{}' for mod '{}'", info.target_group_id, info.name));

  int mod_id = 0;
  if(!installed_mods_.empty())
    mod_id = std::max_element(installed_mods_.begin(), installed_mods_.end())->id + 1;
  while(pu::exists(staging_dir_ / std::to_string(mod_id)) &&
        mod_id < std::numeric_limits<int>().max())
    mod_id++;
  if(mod_id == std::numeric_limits<int>().max())
    throw std::runtime_error("Error: Could not generate new mod id.");
  const sfs::path tmp_replace_dir =
    staging_dir_ / (std::string("tmp_replace_") + std::to_string(mod_id));

  const auto mod_size = Installer::install(info.current_path,
                                           tmp_replace_dir,
                                           info.installer_flags,
                                           info.installer,
                                           info.root_level,
                                           info.files);
  const sfs::path old_mod_path = staging_dir_ / std::to_string(info.target_group_id);
  sfs::remove_all(old_mod_path);
  sfs::rename(tmp_replace_dir, old_mod_path);

  index->name = info.name;
  index->version = info.version;
  index->remote_source = info.remote_source;
  index->local_source = info.local_source;
  index->install_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
  index->remote_update_time = index->install_time;
  index->size_on_disk = mod_size;
  index->remote_mod_id = info.remote_mod_id;
  index->remote_file_id = info.remote_file_id;
  index->remote_type = info.remote_type;

  std::vector<float> weights_profiles;
  std::vector<float> weights_mods;
  std::vector<std::vector<int>> update_targets;
  for(int depl = 0; depl < deployers_.size(); depl++)
  {
    bool was_split = false;
    update_targets.push_back({});
    if(deployers_[depl]->hasMod(info.target_group_id))
      weights_mods.push_back(deployers_[depl]->getNumMods());
    else
      weights_mods.push_back(0);
    if(deployers_[depl]->isAutonomous())
      continue;
    for(int prof = 0; prof < profile_names_.size(); prof++)
    {
      deployers_[depl]->setProfile(prof);
      if(deployers_[depl]->hasMod(info.target_group_id))
      {
        update_targets[depl].push_back(prof);
        weights_profiles.push_back(deployers_[depl]->getNumMods());
        if(!was_split)
        {
          was_split = true;
          splitMod(info.target_group_id, depl);
        }
      }
    }
    deployers_[depl]->setProfile(current_profile_);
  }

  ProgressNode node(progress_callback_, { 10.0f, 6.0f });
  node.child(0).addChildren(weights_mods);
  node.child(1).addChildren(weights_profiles);
  int i = 0;
  for(int depl = 0; depl < update_targets.size(); depl++)
  {
    deployers_[depl]->updateDeployedFilesForMod(info.target_group_id, &node.child(0).child(depl));
    for(int prof : update_targets[depl])
    {
      deployers_[depl]->setProfile(prof);
      deployers_[depl]->updateConflictGroups(&node.child(1).child(i));
      i++;
    }
    deployers_[depl]->setProfile(current_profile_);
  }

  for(auto& tag : auto_tags_)
    tag.updateMods(staging_dir_, std::vector<int>{ info.target_group_id });
  updateAutoTagMap();

  updateSettings(true);
}

void ModdedApplication::updateManualTagMap()
{
  manual_tag_map_.clear();
  for(const auto& mod : installed_mods_)
    manual_tag_map_[mod.id] = {};
  for(const auto& tag : manual_tags_)
  {
    for(int mod_id : tag.getMods())
      manual_tag_map_[mod_id].push_back(tag.getName());
  }
}

void ModdedApplication::updateAutoTagMap()
{
  auto_tag_map_.clear();
  for(const auto& mod : installed_mods_)
    auto_tag_map_[mod.id] = {};
  for(const auto& tag : auto_tags_)
  {
    for(int mod_id : tag.getMods())
      auto_tag_map_[mod_id].push_back(tag.getName());
  }
}

void ModdedApplication::performUpdateCheck(const std::vector<int>& target_mod_indices)
{
  if(target_mod_indices.empty())
  {
    log_(Log::LOG_INFO, "None of the selected mods has a valid remote source.");
    return;
  }
  log_(Log::LOG_INFO,
       std::format("Checking for updates for {} mod{}...",
                   target_mod_indices.size(),
                   target_mod_indices.size() > 1 ? "s" : ""));
  ProgressNode node(progress_callback_);
  node.setTotalSteps(target_mod_indices.size());
  int num_available_updates = 0;
  for(int i : target_mod_indices)
  {
    installed_mods_[i].remote_update_time =
      nexus::Api::getNexusPage(installed_mods_[i].remote_source).mod.updated_time;
    if(installed_mods_[i].remote_update_time > installed_mods_[i].install_time)
      num_available_updates++;
    node.advance();
  }
  if(num_available_updates > 0)
    log_(Log::LOG_INFO,
         std::format("Found updates for {} mod{}.",
                     num_available_updates,
                     num_available_updates == 1 ? "" : "s"));
  else
    log_(Log::LOG_INFO, "No mod updates found.");
  updateSettings(true);
}

std::string ModdedApplication::generalizeSteamPath(const std::string& path)
{
  std::string modified_path = path;
  std::regex install_regex(R"((\/.*\/steamapps\/common\/.*?)(?:\/.*)?)");
  std::regex prefix_regex(
    R"((\/.*\/steamapps\/compatdata\/\d+\/pfx\/(?:drive_c|dosdevices\/c:))(?:\/.*)?)");
  std::regex home_regex(R"(((?:\/home\/.+?)|~)(?:\/.*)?)");
  std::smatch match;
  if(std::regex_match(path, match, install_regex))
    modified_path.replace(0, match[1].length(), "$STEAM_INSTALL_PATH$");
  else if(std::regex_match(path, match, prefix_regex))
    modified_path.replace(0, match[1].length(), "$STEAM_PREFIX_PATH$");
  else if(std::regex_match(path, match, home_regex))
    modified_path.replace(0, match[1].length(), "$HOME$");
  return modified_path;
}

void ModdedApplication::updateSteamIconPath()
{
  std::regex old_path_regex(R"((.*?/steam/appcache/librarycache)/(\d+)_icon\.jpg)");
  std::smatch match;
  std::string path_str = icon_path_.string();
  std::regex_match(path_str, match, old_path_regex);
  if(match.empty() || sfs::exists(icon_path_))
    return;

  sfs::path steam_path(match[1].str());
  steam_path /= match[2].str();
  if(!sfs::exists(steam_path))
    return;

  std::regex name_regex(R"(([0-9a-fA-F]{40})\.jpg)");
  for(const auto& dir_entry : sfs::directory_iterator(steam_path))
  {
    const std::string file_name = dir_entry.path().filename();
    if(std::regex_match(file_name, name_regex))
    {
      icon_path_ = steam_path / file_name;
      updateSettings(true);
      return;
    }
  }
}