using System.Diagnostics;
using System.Net;
using System.Text.Json.Nodes;
using System.Xml;
using Core;
using FluentScheduler;
using Interface.Jobs;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace Service.Jobs;

public class ChineseNfoRegistry : Registry, IChineseNfoRegistry
{
    private readonly IConfiguration _configuration;
    private readonly ILogger<ChineseNfoRegistry> _logger;
    private readonly HttpClient _client;

    public ChineseNfoRegistry(IConfiguration configuration, ILogger<ChineseNfoRegistry> logger)
    {
        _configuration = configuration;
        _logger = logger;

        var httpClientHandler = new HttpClientHandler();

        var proxyAddress = _configuration["ChineseNfo:HttpProxy"];

        if (string.IsNullOrEmpty(proxyAddress) == false)
        {
            httpClientHandler.Proxy = string.IsNullOrEmpty(proxyAddress) ? null : new WebProxy(proxyAddress, false);
            httpClientHandler.UseProxy = !string.IsNullOrEmpty(proxyAddress);
        }

        _client = new HttpClient(httpClientHandler);
        _client.BaseAddress = new Uri("https://api.themoviedb.org");

        Schedule(() => Job(true, true)).ToRunEvery(1).Days();
    }

    public async void Job(bool ignoreLocked, bool ignoreCompleted)
    {
        try
        {
            await JobExecute(ignoreLocked, ignoreCompleted);
        }
        catch (Exception e)
        {
            _logger.LogError(e, "ChineseNfoRegistry.Job() error");
        }
    }


    private async Task JobExecute(bool ignoreLocked, bool ignoreCompleted)
    {
        // 读取环境变量 tv folder 
        var tvFolder = _configuration["ChineseNfo:TvFolder"];
        if (string.IsNullOrEmpty(tvFolder))
        {
            Console.WriteLine("请设置环境变量 tv_folder");
            return;
        }

        var successCount = 0;
        var failedCount = 0;
        var skippedCount = 0;

        // 扫描 tvshow.nfo 文件
        var tvShowFiles = Directory.GetFiles(tvFolder, "tvshow.nfo", SearchOption.AllDirectories);

        foreach (var tvShowFile in tvShowFiles)
        {
            var nfoContent = File.ReadAllText(tvShowFile);

            // 读取 使用XML解析器 读取 <uniqueid type="tmdb">60059</uniqueid>
            var tvXml = new XmlDocument();
            tvXml.LoadXml(nfoContent);
            var uniqueIdNode = tvXml.SelectSingleNode("//uniqueid[@type='tmdb']");
            if (uniqueIdNode == null)
            {
                Console.WriteLine($"{tvShowFile}  &  未找到 tmdb id");
                continue;
            }

            if (!int.TryParse(uniqueIdNode.InnerText, out var tmdbId))
            {
                Console.WriteLine($"{tvShowFile}  &  tmdb id 不是数字");
                continue;
            }

            await SetTvInfo(tvShowFile, tvXml, tmdbId);
            
            // 获取 tvShowFile 的文件夹
            var folderPath = Path.GetDirectoryName(tvShowFile);

            if (folderPath == null)
            {
                Console.WriteLine($"{tvShowFile}  &  未找到文件夹");
                continue;
            }

            // 扫描文件夹下其他 nfo 文件
            var seasonFiles = Directory.GetFiles(folderPath, "*.nfo", SearchOption.AllDirectories);

            seasonFiles = seasonFiles.Where(x => !x.EndsWith("tvshow.nfo")).ToArray();

            foreach (var episodeFile in seasonFiles)
            {
                await SetEpisodeInfo(episodeFile, tmdbId);
            }
        }

        await WxNotify.SendCommonAsync($"ChineseNfoRegistry.Job() success: {successCount}, failed: {failedCount}, skipped: {skippedCount}");

        async Task SetTvInfo(string tvShowFile,XmlDocument tvXml, int tmdbId)
        {
             // 检查 lockdata
            var lockedNode = tvXml.SelectSingleNode("//lockdata");
            if (lockedNode != null && lockedNode.InnerText == "true" && ignoreLocked == false)
            {
                skippedCount++;
                Console.WriteLine($"{tvShowFile}  &  已锁定");
                return;
            }
            
            // 获取tv info
            var tvJson = await GetTmdbTv(tvShowFile, tmdbId);
            
            if (tvJson == null)
            {
                failedCount++;
                return;
            }
            
            var title = tvJson["name"]?.ToString();
            var overview = tvJson["overview"]?.ToString();
            var poster =tvJson["poster_path"]?.ToString();
            var genres = tvJson["genres"]
                ?.AsArray()
                .Select(x => x?["name"]?.ToString())
                .Where(x=> !string.IsNullOrEmpty(x))
                .ToList();

            if (!string.IsNullOrEmpty(title))
            {
                title = $"<![CDATA[{title}]]>";
                var titleNode = tvXml.SelectSingleNode("//title");
                if (titleNode != null)
                {
                    if (titleNode.InnerXml != title)
                    {
                        titleNode.InnerXml = title;
                        successCount++;
                    }    
                }
                
                var sorttitleNode = tvXml.SelectSingleNode("//sorttitle");
                if (sorttitleNode != null)
                {
                    if (sorttitleNode.InnerXml != title)
                    {
                        sorttitleNode.InnerXml = title;
                        successCount++;
                    }
                }
            }
            
            if (!string.IsNullOrEmpty(overview))
            {
                overview = $"<![CDATA[{overview}]]>";
                var plotNode = tvXml.SelectSingleNode("//plot");
                if (plotNode != null)
                {
                    if (plotNode.InnerXml != overview)
                    {
                        plotNode.InnerXml = overview;
                        successCount++;
                    }
                }
                
                var outlineNode = tvXml.SelectSingleNode("//outline");
                if (outlineNode != null)
                {
                    if (outlineNode.InnerXml != overview)
                    {
                        outlineNode.InnerXml = overview;
                        successCount++;
                    }
                }
            }
            
            if(!string.IsNullOrEmpty(poster))
            {
                poster = $"https://image.tmdb.org/t/p/w1280/{poster}";
                // 下载并覆盖海报
                var posterPath = tvShowFile.Replace("tvshow.nfo", $"poster.{poster.Split('.').Last()}");
                
                using var client = new HttpClient();
                var response = await client.GetAsync(poster);
                if (response.IsSuccessStatusCode)
                {
                    var bytes = await response.Content.ReadAsByteArrayAsync();
                    
                    if (File.Exists(posterPath))
                    {
                        File.Delete(posterPath);
                    }
                    
                    await File.WriteAllBytesAsync(posterPath, bytes);
                    successCount++;
                }
            }


            if (genres?.Any() == true)
            {
                // 删除原有的 <genre> 节点
                var genreNodes = tvXml.SelectNodes("//genre");
                if (genreNodes != null)
                {
                    foreach (XmlNode genreNode in genreNodes)
                    {
                        tvXml.DocumentElement?.RemoveChild(genreNode);
                    }
                }
                
                // 添加新的 <genre> 节点
                foreach (var genre in genres)
                {
                    var genreNode = tvXml.CreateElement("genre");
                    genreNode.InnerText = genre!;
                    tvXml.DocumentElement?.AppendChild(genreNode);
                }
                successCount++;
            }
            
            if (successCount == 0)
            {
                skippedCount++;
                Console.WriteLine($"{tvShowFile}  &  无更新");
                return;
            }
            
            // 锁定节点
            if(lockedNode == null)
            {
                lockedNode = tvXml.CreateElement("lockdata");
                tvXml.DocumentElement?.AppendChild(lockedNode);
                lockedNode.InnerText = "true";
            }
            else
            {
                lockedNode.InnerText = "true";
            }
            
            // 添加一个已完成节点
            var completedNode = tvXml.SelectSingleNode("//completed");
            if (completedNode == null)
            {
                completedNode = tvXml.CreateElement("completed");
                tvXml.DocumentElement?.AppendChild(completedNode);
            }
            completedNode.InnerText = "true";
            
            try
            {
                tvXml.Save(tvShowFile);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                failedCount++;
            }
        }

        async Task SetEpisodeInfo(string episodeFile, int tmdbId)
        {
            var episodeContent = await File.ReadAllTextAsync(episodeFile);
            var episodeXml = new XmlDocument();
            episodeXml.LoadXml(episodeContent);

            // 判断有无 completed 节点
            var completedNode = episodeXml.SelectSingleNode("//completed");
            if (completedNode != null && ignoreCompleted == false)
            {
                skippedCount++;
                Console.WriteLine($"{episodeFile}  &  已完成");
                return;
            }

            // 判断 locked == true
            var lockedNode = episodeXml.SelectSingleNode("//lockdata");
            if (lockedNode != null && lockedNode.InnerText == "true" && ignoreLocked == false)
            {
                skippedCount++;
                Console.WriteLine($"{episodeFile}  &  已锁定");
                return;
            }

            // 读取 <season>1</season>
            var seasonNode = episodeXml.SelectSingleNode("//season");
            if (seasonNode == null)
            {
                failedCount++;
                Console.WriteLine($"{episodeFile}  &  未找到 season");
                return;
            }

            // 读取 <episode>1</episode>
            var episodeNode = episodeXml.SelectSingleNode("//episode");
            if (episodeNode == null)
            {
                failedCount++;
                Console.WriteLine($"{episodeFile}  &  未找到 episode");
                return;
            }

            if (!int.TryParse(seasonNode.InnerText, out var season))
            {
                failedCount++;
                Console.WriteLine($"{episodeFile}  &  season 不是数字");
                return;
            }

            if (!int.TryParse(episodeNode.InnerText, out var episode))
            {
                failedCount++;
                Console.WriteLine($"{episodeFile}  &  episode 不是数字");
                return;
            }

            // 设置 title 
            var titleNode = episodeXml.SelectSingleNode("//title");
            if (titleNode == null)
            {
                failedCount++;
                Console.WriteLine($"{episodeFile}  &  未找到 title");
                return;
            }

            var json = await GetTmdbEpisode(
                episodeFile,
                tmdbId,
                season,
                episode);

            if (json == null)
            {
                failedCount++;
                return;
            }

            var title = json["name"]?.ToString();
            var overview = json["overview"]?.ToString();

            var isUpdate = false;
            if (!string.IsNullOrEmpty(title))
            {
                title = $"<![CDATA[{title}]]>";

                if (titleNode.InnerXml != title)
                {
                    isUpdate = true;
                    // 写入且不转义
                    titleNode.InnerXml = title;
                }
            }

            var plotNode = episodeXml.SelectSingleNode("//plot");

            if (!string.IsNullOrEmpty(overview) && plotNode != null)
            {
                overview = $"<![CDATA[{overview}]]>";
                if (plotNode.InnerXml != overview)
                {
                    isUpdate = true;
                    plotNode.InnerXml = overview;
                }
            }

            if (!isUpdate)
            {
                skippedCount++;
                Console.WriteLine($"{episodeFile}  &  无更新");
                return;
            }

            successCount++;

            // 添加一个已完成节点
            if (completedNode == null)
            {
                episodeXml.DocumentElement?.AppendChild(episodeXml.CreateElement("completed"));
            }

            // 锁定
            if (lockedNode == null)
            {
                lockedNode = episodeXml.CreateElement("lockdata");
                episodeXml.DocumentElement?.AppendChild(lockedNode);
                lockedNode.InnerText = "true";
            }
            else
            {
                lockedNode.InnerText = "true";
            }

            try
            {
                episodeXml.Save(episodeFile);
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
                return;
            }

            Console.WriteLine($"{episodeFile}  &  {title}  &  {overview}");
        }
    }

    private async Task<JsonObject?> GetTmdbTv(
        string path,
        int tmdbId)
    {
        const string tvUrl = "/3/tv/{0}?api_key=e28e1bc408db7adefc8bacce225c5085&language=zh-CN";
        var requestUrl = string.Format(tvUrl, tmdbId);

        try
        {
            var response = await _client.GetAsync(requestUrl);
            
            await Task.Delay(10000);
            
            if (!response.IsSuccessStatusCode)
            {
                Console.WriteLine($"{requestUrl} & {path} &  {response.StatusCode}");
                return null;
            }

            var content = await response.Content.ReadAsStringAsync();
            var json = JsonNode.Parse(content);
            return json as JsonObject;
        }
        catch (Exception e)
        {
            Console.WriteLine($"{requestUrl} & {path} \r {e}");
            return null;
        }
    }
    
    private async Task<JsonObject?> GetTmdbEpisode(
        string path,
        int tmdbId,
        int season,
        int episode)
    {
        const string episodeUrl = "/3/tv/{0}/season/{1}/episode/{2}?api_key=e28e1bc408db7adefc8bacce225c5085&language=zh-CN";
        var requestUrl = string.Format(episodeUrl, tmdbId, season, episode);

        try
        {
            var response = await _client.GetAsync(requestUrl);
            
            await Task.Delay(10000);
            
            if (!response.IsSuccessStatusCode)
            {
                Console.WriteLine($"{requestUrl} & {path} &  {response.StatusCode}");
                return null;
            }

            var content = await response.Content.ReadAsStringAsync();
            var json = JsonNode.Parse(content);
            return json as JsonObject;
        }
        catch (Exception e)
        {
            Console.WriteLine($"{requestUrl} & {path} \r {e}");
            return null;
        }
    }
}