using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using API.Data;
using API.DTOs.Recommendation;
using API.Entities.Enums;
using API.Helpers.Builders;
using Flurl.Http;
using Kavita.Common;
using Kavita.Common.EnvironmentInfo;
using Kavita.Common.Helpers;
using Microsoft.Extensions.Logging;

namespace API.Services.Plus;

public interface IExternalMetadataService
{
    Task<ExternalSeriesDetailDto> GetExternalSeriesDetail(int? aniListId, long? malId);
}

public class ExternalMetadataService : IExternalMetadataService
{
    private readonly IUnitOfWork _unitOfWork;
    private readonly ILogger<ExternalMetadataService> _logger;

    public ExternalMetadataService(IUnitOfWork unitOfWork, ILogger<ExternalMetadataService> logger)
    {
        _unitOfWork = unitOfWork;
        _logger = logger;

        FlurlHttp.ConfigureClient(Configuration.KavitaPlusApiUrl, cli =>
            cli.Settings.HttpClientFactory = new UntrustedCertClientFactory());
    }

    public async Task<ExternalSeriesDetailDto?> GetExternalSeriesDetail(int? aniListId, long? malId)
    {
        if (!aniListId.HasValue && !malId.HasValue)
        {
            throw new KavitaException("Unable to find valid information from url for External Load");
        }

        var license = (await _unitOfWork.SettingsRepository.GetSettingAsync(ServerSettingKey.LicenseKey)).Value;
        return await GetSeriesDetail(license, aniListId, malId);

    }

    private async Task<ExternalSeriesDetailDto?> GetSeriesDetail(string license, int? anilistId, long? malId)
    {
        try
        {
            return await (Configuration.KavitaPlusApiUrl + "/api/metadata/series/detail")
                .WithHeader("Accept", "application/json")
                .WithHeader("User-Agent", "Kavita")
                .WithHeader("x-license-key", license)
                .WithHeader("x-installId", HashUtil.ServerToken())
                .WithHeader("x-kavita-version", BuildInfo.Version)
                .WithHeader("Content-Type", "application/json")
                .WithTimeout(TimeSpan.FromSeconds(Configuration.DefaultTimeOutSecs))
                .PostJsonAsync(new
                {
                    AnilistId = anilistId,
                    MalId = malId,
                })
                .ReceiveJson<ExternalSeriesDetailDto>();

        }
        catch (Exception e)
        {
            _logger.LogError(e, "An error happened during the request to Kavita+ API");
        }

        return null;
    }
}