using System.Text;
using Cleanuparr.Domain.Entities.Arr;
using Cleanuparr.Domain.Entities.Arr.Queue;
using Cleanuparr.Domain.Entities.Readarr;
using Cleanuparr.Infrastructure.Features.Arr.Interfaces;
using Cleanuparr.Infrastructure.Features.ItemStriker;
using Cleanuparr.Infrastructure.Interceptors;
using Cleanuparr.Persistence.Models.Configuration.Arr;
using System.Text.Json;
using Cleanuparr.Infrastructure.Json;
using Microsoft.Extensions.Logging;

namespace Cleanuparr.Infrastructure.Features.Arr;

public class ReadarrClient : ArrClient, IReadarrClient
{
    public ReadarrClient(
        ILogger<ReadarrClient> logger,
        IHttpClientFactory httpClientFactory,
        IStriker striker,
        IDryRunInterceptor dryRunInterceptor
    ) : base(logger, httpClientFactory, striker, dryRunInterceptor)
    {
    }
    
    protected override string ApiVersion => "v1";

    protected override string GetSystemStatusUrlPath()
    {
        return $"/api/{ApiVersion}/system/status";
    }

    protected override string GetQueueUrlPath()
    {
        return $"/api/{ApiVersion}/queue";
    }

    protected override string GetQueueUrlQuery(int page)
    {
        return $"page={page}&pageSize={QueuePageSize}&includeUnknownAuthorItems=true&includeAuthor=true&includeBook=true";
    }

    protected override string GetQueueDeleteUrlPath(long recordId)
    {
        return $"/api/{ApiVersion}/queue/{recordId}";
    }

    public override async Task<List<long>> SearchItemsAsync(ArrInstance arrInstance, HashSet<SearchItem>? items)
    {
        if (items?.Count is null or 0)
        {
            return [];
        }

        List<long> ids = items.Select(item => item.Id).ToList();

        UriBuilder uriBuilder = new(arrInstance.Url);
        uriBuilder.Path = $"{uriBuilder.Path.TrimEnd('/')}{CommandUrlPath}";

        ReadarrCommand command = new()
        {
            Name = "BookSearch",
            BookIds = ids,
        };

        using HttpRequestMessage request = new(HttpMethod.Post, uriBuilder.Uri);
        request.Content = new StringContent(
            JsonSerializer.Serialize(command, CleanuparrJsonOptions.Outbound),
            Encoding.UTF8,
            "application/json"
        );
        SetApiKey(request, arrInstance.ApiKey);

        string? logContext = await ComputeCommandLogContextAsync(arrInstance, command);

        try
        {
            using HttpResponseMessage? response = await _dryRunInterceptor.InterceptAsync(() => SendRequestAsync(request));

            long? commandId = null;

            if (response is not null)
            {
                commandId = await ReadCommandIdAsync(response);
            }

            _logger.LogInformation("{Log}", GetSearchLog(arrInstance.Url, command, true, logContext));

            return commandId.HasValue ? [commandId.Value] : [];
        }
        catch
        {
            _logger.LogError("{Log}", GetSearchLog(arrInstance.Url, command, false, logContext));
            throw;
        }
    }

    public override bool HasContentId(QueueRecord record) => record.AuthorId is not 0 && record.BookId is not 0;

    private static string GetSearchLog(Uri instanceUrl, ReadarrCommand command, bool success, string? logContext)
    {
        string status = success ? "triggered" : "failed";
        string message = logContext ?? $"book ids: {string.Join(',', command.BookIds)}";

        return $"book search {status} | {instanceUrl} | {message}";
    }

    private async Task<string?> ComputeCommandLogContextAsync(ArrInstance arrInstance, ReadarrCommand command)
    {
        try
        {
            StringBuilder log = new();

            foreach (long bookId in command.BookIds)
            {
                Book? book = await GetBookAsync(arrInstance, bookId);

                if (book is null)
                {
                    return null;
                }

                log.Append($"[{book.Title}]");
            }

            return log.ToString();
        }
        catch (Exception exception)
        {
            _logger.LogDebug(exception, "failed to compute log context");
        }

        return null;
    }

    private async Task<Book?> GetBookAsync(ArrInstance arrInstance, long bookId)
    {
        UriBuilder uriBuilder = new(arrInstance.Url);
        uriBuilder.Path = $"{uriBuilder.Path.TrimEnd('/')}/api/{ApiVersion}/book/{bookId}";

        using HttpRequestMessage request = new(HttpMethod.Get, uriBuilder.Uri);
        SetApiKey(request, arrInstance.ApiKey);

        using HttpResponseMessage response = await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
        response.EnsureSuccessStatusCode();

        return await DeserializeStreamAsync<Book>(response);
    }
    
    public override async Task<List<Tag>> GetAllTagsAsync(ArrInstance arrInstance)
    {
        throw new NotImplementedException();
    }
}