using Cleanuparr.Domain.Entities;
using Cleanuparr.Domain.Enums;
using Cleanuparr.Persistence.Converters;
using Cleanuparr.Persistence.Models.Configuration;
using Cleanuparr.Persistence.Models.Configuration.Arr;
using Cleanuparr.Persistence.Models.Configuration.DownloadCleaner;
using Cleanuparr.Persistence.Models.Configuration.General;
using Cleanuparr.Persistence.Models.Configuration.MalwareBlocker;
using Cleanuparr.Persistence.Models.Configuration.Notification;
using Cleanuparr.Persistence.Models.Configuration.QueueCleaner;
using Cleanuparr.Persistence.Models.Configuration.BlacklistSync;
using Cleanuparr.Persistence.Models.State;
using Cleanuparr.Shared.Helpers;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
using Serilog.Events;

namespace Cleanuparr.Persistence;

/// <summary>
/// Database context for configuration data
/// </summary>
public class DataContext : DbContext
{
    public static SemaphoreSlim Lock { get; } = new(1, 1);
    
    public DbSet<GeneralConfig> GeneralConfigs { get; set; }
    
    public DbSet<DownloadClientConfig> DownloadClients { get; set; }
    
    public DbSet<QueueCleanerConfig> QueueCleanerConfigs { get; set; }
    
    public DbSet<StallRule> StallRules { get; set; }
    
    public DbSet<SlowRule> SlowRules { get; set; }
    
    public DbSet<ContentBlockerConfig> ContentBlockerConfigs { get; set; }
    
    public DbSet<DownloadCleanerConfig> DownloadCleanerConfigs { get; set; }
    
    public DbSet<SeedingRule> SeedingRules { get; set; }
    
    public DbSet<ArrConfig> ArrConfigs { get; set; }
    
    public DbSet<ArrInstance> ArrInstances { get; set; }
    
    public DbSet<NotificationConfig> NotificationConfigs { get; set; }
    
    public DbSet<NotifiarrConfig> NotifiarrConfigs { get; set; }
    
    public DbSet<AppriseConfig> AppriseConfigs { get; set; }
    
    public DbSet<NtfyConfig> NtfyConfigs { get; set; }

    public DbSet<PushoverConfig> PushoverConfigs { get; set; }
    
    public DbSet<TelegramConfig> TelegramConfigs { get; set; }

    public DbSet<DiscordConfig> DiscordConfigs { get; set; }

    public DbSet<GotifyConfig> GotifyConfigs { get; set; }

    public DbSet<BlacklistSyncHistory> BlacklistSyncHistory { get; set; }

    public DbSet<BlacklistSyncConfig> BlacklistSyncConfigs { get; set; }

    public DataContext()
    {
    }

    public DataContext(DbContextOptions<DataContext> options) : base(options)
    {
    }
    
    public static DataContext CreateStaticInstance()
    {
        var optionsBuilder = new DbContextOptionsBuilder<DataContext>();
        SetDbContextOptions(optionsBuilder);
        return new DataContext(optionsBuilder.Options);
    }
    
    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        SetDbContextOptions(optionsBuilder);
    }
    
    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<GeneralConfig>(entity =>
        {
            entity.ComplexProperty(e => e.Log, cp =>
            {
                cp.Property(l => l.Level).HasConversion<LowercaseEnumConverter<LogEventLevel>>();
            });

            entity.ComplexProperty(e => e.Auth, cp =>
            {
                cp.Property(a => a.TrustedNetworks)
                    .HasConversion(
                        v => string.Join(',', v),
                        v => v.Split(',', StringSplitOptions.RemoveEmptyEntries).ToList());
            });
        });
        
        modelBuilder.Entity<QueueCleanerConfig>(entity =>
        {
            entity.ComplexProperty(e => e.FailedImport, cp =>
            {
                cp.Property(x => x.PatternMode).HasConversion<LowercaseEnumConverter<PatternMode>>();
            });
        });
        
        modelBuilder.Entity<ContentBlockerConfig>(entity =>
        {
            entity.ComplexProperty(e => e.Sonarr, cp =>
            {
                cp.Property(s => s.BlocklistType).HasConversion<LowercaseEnumConverter<BlocklistType>>();
            });
            entity.ComplexProperty(e => e.Radarr, cp =>
            {
                cp.Property(s => s.BlocklistType).HasConversion<LowercaseEnumConverter<BlocklistType>>();
            });
            entity.ComplexProperty(e => e.Lidarr, cp =>
            {
                cp.Property(s => s.BlocklistType).HasConversion<LowercaseEnumConverter<BlocklistType>>();
            });
            entity.ComplexProperty(e => e.Readarr, cp =>
            {
                cp.Property(s => s.BlocklistType).HasConversion<LowercaseEnumConverter<BlocklistType>>();
            });
        });
        
        // Configure ArrConfig -> ArrInstance relationship
        modelBuilder.Entity<ArrConfig>(entity =>
        {
            entity.HasMany(a => a.Instances)
                  .WithOne(i => i.ArrConfig)
                  .HasForeignKey(i => i.ArrConfigId)
                  .OnDelete(DeleteBehavior.Cascade);
        });
        
        // Configure new notification system relationships
        modelBuilder.Entity<NotificationConfig>(entity =>
        {
            entity.Property(e => e.Type).HasConversion(new LowercaseEnumConverter<NotificationProviderType>());

            entity.HasOne(p => p.NotifiarrConfiguration)
                  .WithOne(c => c.NotificationConfig)
                  .HasForeignKey<NotifiarrConfig>(c => c.NotificationConfigId)
                  .OnDelete(DeleteBehavior.Cascade);
                  
            entity.HasOne(p => p.AppriseConfiguration)
                  .WithOne(c => c.NotificationConfig)
                  .HasForeignKey<AppriseConfig>(c => c.NotificationConfigId)
                  .OnDelete(DeleteBehavior.Cascade);
                  
            entity.HasOne(p => p.NtfyConfiguration)
                  .WithOne(c => c.NotificationConfig)
                  .HasForeignKey<NtfyConfig>(c => c.NotificationConfigId)
                  .OnDelete(DeleteBehavior.Cascade);

            entity.HasOne(p => p.PushoverConfiguration)
                  .WithOne(c => c.NotificationConfig)
                  .HasForeignKey<PushoverConfig>(c => c.NotificationConfigId)
                  .OnDelete(DeleteBehavior.Cascade);

            entity.HasOne(p => p.TelegramConfiguration)
                .WithOne(c => c.NotificationConfig)
                .HasForeignKey<TelegramConfig>(c => c.NotificationConfigId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasOne(p => p.DiscordConfiguration)
                .WithOne(c => c.NotificationConfig)
                .HasForeignKey<DiscordConfig>(c => c.NotificationConfigId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasOne(p => p.GotifyConfiguration)
                .WithOne(c => c.NotificationConfig)
                .HasForeignKey<GotifyConfig>(c => c.NotificationConfigId)
                .OnDelete(DeleteBehavior.Cascade);

            entity.HasIndex(p => p.Name).IsUnique();
        });

        // Configure PushoverConfig List<string> conversions
        modelBuilder.Entity<PushoverConfig>(entity =>
        {
            entity.Property(p => p.Devices)
                  .HasConversion(
                      v => string.Join(',', v),
                      v => v.Split(',', StringSplitOptions.RemoveEmptyEntries).ToList());

            entity.Property(p => p.Tags)
                  .HasConversion(
                      v => string.Join(',', v),
                      v => v.Split(',', StringSplitOptions.RemoveEmptyEntries).ToList());
        });

        // Configure BlacklistSyncState relationships and indexes
        modelBuilder.Entity<BlacklistSyncHistory>(entity =>
        {
            // FK to DownloadClientConfig by DownloadClientId with cascade on delete
            entity.HasOne(s => s.DownloadClient)
                  .WithMany()
                  .HasForeignKey(s => s.DownloadClientId)
                  .OnDelete(DeleteBehavior.Cascade);

            entity.HasIndex(s => new { s.Hash, DownloadClientId = s.DownloadClientId }).IsUnique();
            entity.HasIndex(s => s.Hash);
        });
        
        foreach (var entityType in modelBuilder.Model.GetEntityTypes())
        {
            // Use OriginalString for Uri properties to preserve the exact input (including embedded credentials)
            foreach (var property in entityType.GetProperties().Where(p => p.ClrType == typeof(Uri)))
            {
                property.SetValueConverter(
                    new ValueConverter<Uri, string>(
                        v => v.OriginalString,
                        v => new Uri(v, UriKind.RelativeOrAbsolute)));

                property.SetValueComparer(new ValueComparer<Uri>(
                    (u1, u2) => u1 != null && u2 != null
                        ? u1.OriginalString == u2.OriginalString
                        : u1 == null && u2 == null,
                    u => u == null ? 0 : u.OriginalString.GetHashCode(),
                    u => u == null ? null! : new Uri(u.OriginalString, UriKind.RelativeOrAbsolute)));
            }

            var enumProperties = entityType.ClrType.GetProperties()
                .Where(p => p.PropertyType.IsEnum ||
                            (p.PropertyType.IsGenericType &&
                             p.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>) &&
                             p.PropertyType.GetGenericArguments()[0].IsEnum));

            foreach (var property in enumProperties)
            {
                var enumType = property.PropertyType.IsEnum
                    ? property.PropertyType
                    : property.PropertyType.GetGenericArguments()[0];

                var converterType = typeof(LowercaseEnumConverter<>).MakeGenericType(enumType);
                var converter = Activator.CreateInstance(converterType);

                modelBuilder.Entity(entityType.ClrType)
                    .Property(property.Name)
                    .HasConversion((ValueConverter)converter!);
            }
        }
    }

    private static void SetDbContextOptions(DbContextOptionsBuilder optionsBuilder)
    {
        if (optionsBuilder.IsConfigured)
        {
            return;
        }
        
        var dbPath = Path.Combine(ConfigurationPathProvider.GetConfigPath(), "cleanuparr.db");
        optionsBuilder
            .UseSqlite($"Data Source={dbPath}")
            .UseLowerCaseNamingConvention()
            .UseSnakeCaseNamingConvention();
    }
}