/*
    A Program that splits videos between two servers (determines which server using keywords) to https://gitlab.tesses.net/tesses50/tytd
    Copyright (C) 2023 Tesses

        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

namespace TYTDMultiDownloader;
using Tesses.YouTubeDownloader;
using Tesses.WebServer;
using System.Threading.Tasks;
using YoutubeExplode.Videos;
using YoutubeExplode.Channels;
using YoutubeExplode.Playlists;
using System.Collections.Generic;
using System.Text;
using Newtonsoft.Json;

class Program
{
    
    public class Downloader : IDownloader
    {
        public List<SavedVideo> Videos {get;set;}=new List<SavedVideo>();
        TYTDPathDirectory dir;
        TYTDClient nwii;
        TYTDClient nswitch;
        Func<SavedVideo,bool> isWii;
        public Downloader(TYTDPathDirectory dir,TYTDClient nwii,TYTDClient nswitch,Func<SavedVideo,bool> isWii)
        {
            this.dir = dir;
            this.nwii = nwii;
            this.nswitch = nswitch;
            this.isWii = isWii;
        }
        public event EventHandler<VideoStartedEventArgs>? VideoStarted;
        public event EventHandler<VideoProgressEventArgs>? VideoProgress;
        public event EventHandler<VideoFinishedEventArgs>? VideoFinished;
        public event EventHandler<TYTDErrorEventArgs>? Error;
        public event EventHandler<BellEventArgs>? Bell;

        public async Task AddChannelAsync(ChannelId id, Resolution resolution = Resolution.PreMuxed)
        {
            if(!dir.ChannelInfoExists(id))
            {
                var res=await dir.YoutubeClient.Channels.GetAsync(id);
                await dir.WriteChannelInfoAsync(new SavedChannel(res));
            }
            await foreach(var video in dir.YoutubeClient.Channels.GetUploadsAsync(id))
            {
                await AddVideoAsync(video.Id,resolution);
            }
        }

        public async Task AddFileAsync(string url, bool download = true)
        {
            await Task.FromResult(0);
        }

        public async Task AddHandleAsync(ChannelHandle handle, Resolution resolution = Resolution.PreMuxed)
        {
            var res=await dir.YoutubeClient.Channels.GetByHandleAsync(handle);
            await SaveChannelDataAsync(res);
            await AddChannelAsync(res.Id,resolution);
        }

        public async Task AddPlaylistAsync(PlaylistId id, Resolution resolution = Resolution.PreMuxed)
        {
            
            var res=await dir.YoutubeClient.Playlists.GetAsync(id);
            List<IVideo> videos=new List<IVideo>();
            await foreach(var item in dir.YoutubeClient.Playlists.GetVideosAsync(id))
            {
                videos.Add(item);
                
                await AddVideoAsync(item.Id,resolution);
            }
            var pl=new SavedPlaylist(res,videos);
            await dir.WritePlaylistInfoAsync(pl);
            
        }

        public async Task AddSlugAsync(ChannelSlug handle, Resolution resolution = Resolution.PreMuxed)
        {
            var res=await dir.YoutubeClient.Channels.GetBySlugAsync(handle);
            await SaveChannelDataAsync(res);
            await AddChannelAsync(res.Id,resolution);
        }

        private async Task SaveChannelDataAsync(Channel res)
        {
            if(!dir.ChannelInfoExists(res.Id))
            {
                await dir.WriteChannelInfoAsync(new SavedChannel(res));
            }
        }

        public async Task AddToPersonalPlaylistAsync(string name, IEnumerable<ListContentItem> items)
        {
            await Task.FromResult(0);
        }

        public async Task AddUserAsync(UserName userName, Resolution resolution = Resolution.PreMuxed)
        {
            var res=await dir.YoutubeClient.Channels.GetByUserAsync(userName);
            await SaveChannelDataAsync(res);
            await AddChannelAsync(res.Id,resolution);
        }

        public async Task AddVideoAsync(VideoId id, Resolution resolution = Resolution.PreMuxed)
        {
            SavedVideo video;
            if(!dir.VideoInfoExists(id))
            {
                video=new SavedVideo(await dir.YoutubeClient.Videos.GetAsync(id));
                await dir.WriteVideoInfoAsync(video);
            }else{
                video = await dir.GetVideoInfoAsync(id);
            }
            Videos.Add(video);
            if(resolution != Resolution.NoDownload)
            {
                await (isWii(video) ? nwii : nswitch).AddVideoAsync(id,resolution);
                if(isWii(video))
                {
                    Console.WriteLine($"Wii Download: {video.Title} with Id: {video.Id}");
                }else{
                    Console.WriteLine($"Switch Download: {video.Title} with Id: {video.Id}");
                }
            }
        }

        public void CancelDownload(bool restart = false)
        {
            
        }

        public void DeletePersonalPlaylist(string name)
        {
            
        }

        public ExtraData GetExtraData()
        {
            return new ExtraData();
        }

        public async IAsyncEnumerable<ListContentItem> GetPersonalPlaylistContentsAsync(string name)
        {
            await Task.FromResult(0);
            yield break;
        }

        public SavedVideoProgress GetProgress()
        {
            return new SavedVideoProgress();
        }

        public IReadOnlyList<(SavedVideo Video, Resolution Resolution)> GetQueueList()
        {
            return new List<(SavedVideo Video,Resolution Resolution)>();
        }

        public async IAsyncEnumerable<Subscription> GetSubscriptionsAsync()
        {
            await Task.FromResult(0);
            yield break;
        }

        public bool PersonalPlaylistExists(string name)
        {
            return false;
        }

        public async Task RemoveItemFromPersonalPlaylistAsync(string name, VideoId id)
        {
            await Task.FromResult(0);
        }

        public async Task ReplacePersonalPlaylistAsync(string name, IEnumerable<ListContentItem> items)
        {
            await Task.FromResult(0);
        }

        public async Task ResubscribeAsync(ChannelId id, ChannelBellInfo info = ChannelBellInfo.NotifyAndDownload)
        {
            await Task.FromResult(0);
        }

        public async Task SetResolutionForItemInPersonalPlaylistAsync(string name, VideoId id, Resolution resolution)
        {
            await Task.FromResult(0);
        }

        public async Task SubscribeAsync(ChannelId id, ChannelBellInfo bellInfo = ChannelBellInfo.NotifyAndDownload)
        {
            await Task.FromResult(0);
        }

        public async Task SubscribeAsync(UserName name, ChannelBellInfo info = ChannelBellInfo.NotifyAndDownload)
        {
            await Task.FromResult(0);
        }

        public async Task UnsubscribeAsync(ChannelId id)
        {
            await Task.FromResult(0);
        }
    }

    private static Config _get_cfg()
    {
        Directory.CreateDirectory("working/WebSite");
        if(File.Exists("working/cfg.json"))
        {
            var cfg=JsonConvert.DeserializeObject<Config>(File.ReadAllText("working/cfg.json"));
            if(cfg != null) return cfg;
        }
        return new Config();
    }
    public static Config cfg = _get_cfg();
    public static TYTDPathDirectory dir= new TYTDPathDirectory("working");
    public static TYTDClient nintendo_wii = new TYTDClient(cfg.Match); //change my url to your url for if video added contains keyword/keywords from working/wii.txt
    public static TYTDClient nintendo_switch = new TYTDClient(cfg.NoMatch); //change my url to your url for if video added does not contain keyword/keywords from working/wii.txt
    
    public static List<string> wiiLines = new List<string>();
    public static bool WiiSwitchHandler(SavedVideo video)
    {
        StringBuilder b = new StringBuilder();
        foreach(var item in video.Keywords)
        {
            b.Append(item.Replace(" ","").ToLower());
        }
        b.Append(video.Title.Replace(" ","").ToLower());
        b.Append(video.Description.Replace(" ","").Replace("\n","").Replace("\r","").Replace("\t","").ToLower());
        b.Append(video.AuthorTitle.Replace(" ","").ToLower());

        string b2 = b.ToString();
        foreach(var item in wiiLines)
        {
            if(b2.Contains(item)) return true;
        }

        return false;
    }
    static void Main(string[] args)
    {

        
        foreach(var item in cfg.Matches)
        {
            wiiLines.Add(item.Replace(" ","").ToLower());
        }
        Func<Downloader> dl = ()=>{
            return new Downloader(dir,nintendo_wii,nintendo_switch,WiiSwitchHandler);
        };
        dir.CreateDirectories();
        dir.CanDownload = false;  //we do not want this computer to download any videos or thumbnails
        StaticServer staticServer = new StaticServer("working/WebSite",true);
        staticServer.AllowUpload=false;
        MountableServer mountableServer = new MountableServer(staticServer);
        mountableServer.Mount("/api/",new AddServer(dl));

        mountableServer.StartServer(cfg.Port);
        
    }

    public class AddServer : Server
    {
        public override async Task PostAsync(ServerContext ctx)
        {
            ctx.ParseBody();
            var dl=dl0();
            

             Resolution _dl2=Resolution.NoDownload;
                string _dl;
            
                if(ctx.QueryParams.TryGetFirst("dl",out _dl))
                {
                    if(_dl == "on") _dl2=Resolution.PreMuxed;
                }
                string videoLs;
                if(ctx.QueryParams.TryGetFirst("urls",out videoLs))
                {
                        string[] _videos=videoLs.Replace("\r",",").Replace("\n",",").Replace(" ",",").Split(",",StringSplitOptions.RemoveEmptyEntries);
                        foreach(var item in _videos)
                        {
                            await dl.AddItemAsync(item,_dl2);
                        }
                        StringBuilder b = new StringBuilder("<!doctype html><html><head><title>Videos</title></head><body><h1>Videos</h1>");
                        foreach(var items in dl.Videos)
                        {
                            var strm=await BestStreamInfo.GetBestStreams(dir,items.Id);
                            string title = $"{items.Title}-{items.Id}.{strm.MuxedStreamInfo.Container.Name}";
                            string item = $"<a href=\"./Stream?v={items.Id}\">{System.Web.HttpUtility.HtmlEncode(title)}</a><br>";
                            b.Append(item);
                        }
                        b.Append("</body></html>");
                        
                        await ctx.SendTextAsync(b.ToString());
                        return;
                 
                    
                }
                
                await ctx.SendTextAsync("<!doctype html><html><head><title>Error</title></head><body><h1>Error</h1></body></html>");
        }
        Func<Downloader> dl0;
        
        public AddServer(Func<Downloader> dl)
        {
            this.dl0 = dl;
        //    this._lock = _lock;
        }
        public bool IsPath(ServerContext ctx,string path,out string myArgument)
        {
            if(ctx.UrlPath.StartsWith(path))
            {
                myArgument = ctx.UrlPath.Substring(path.Length);
                return true;
            }
            myArgument = "";
            return false;
        }
        public override async Task GetAsync(ServerContext ctx)
        {

            var dl=dl0();
            
            try{
            string data;
            if(IsPath(ctx,"/AddItem/",out data))
            {
                await dl.AddItemAsync(data);
            }            
            if(IsPath(ctx,"/AddVideo/",out data))
            {
                VideoId? videoId = VideoId.TryParse(data);
                if(videoId.HasValue)
                {
                    await dl.AddVideoAsync(videoId.Value);
                }
                
            }
            if(IsPath(ctx,"/AddItemRes/",out data))
            {
                string[] data2=data.Split('/',2,StringSplitOptions.RemoveEmptyEntries);
                if(data2.Length == 2)
                {
                    await dl.AddItemAsync(data2[1]);
                }
            }            
            if(IsPath(ctx,"/AddVideoRes/",out data))
            {
                string[] data2=data.Split('/',2,StringSplitOptions.RemoveEmptyEntries);
               
               if(data2.Length == 2)
               {
                    VideoId? videoId = VideoId.TryParse(data2[1]);
                    if(videoId.HasValue)
                    {
                        await dl.AddVideoAsync(videoId.Value);
                    }
               }
            }
            
            if(ctx.UrlPath == "/Stream")
            {
                //?dl=true
                string v;
                if(ctx.QueryParams.TryGetFirst("v",out v))
                {
                    VideoId? id = VideoId.TryParse(v);
                    if(id.HasValue)
                    {
                        SavedVideo video;
                        if(!dir.VideoInfoExists(id.Value))
                        {
                            video = new SavedVideo(await dir.YoutubeClient.Videos.GetAsync(id.Value));
                            await dir.WriteVideoInfoAsync(video);
                        }else{
                            video = await dir.GetVideoInfoAsync(id.Value);
                        }
                        var strm=await BestStreamInfo.GetBestStreams(dir,id.Value);
                        
                        string title = $"{video.Title}-{video.Id}.{strm.MuxedStreamInfo.Container.Name}";
                        System.Net.Mime.ContentDisposition cd = new System.Net.Mime.ContentDisposition();
                        cd.FileName = title;

                        ctx.ResponseHeaders.Add("Content-Disposition",cd.ToString());
                    
                        await ctx.SendStreamAsync(await dir.YoutubeClient.Videos.Streams.GetAsync(strm.MuxedStreamInfo),HeyRed.Mime.MimeTypesMap.GetMimeType(title));
                        return;
                    }
                }
               



            }
            
            await ctx.SendTextAsync("OK");
            }catch(Exception ex)
            {
                
                await ctx.SendExceptionAsync(ex);
            }
        }
    }
}

internal class Config
{
    public string Match {get;set;}="http://192.168.0.142:3252/";
    public string NoMatch {get;set;}="http://192.168.0.112:3252/";
    public int Port {get;set;}=3252;
    public List<string> Matches {get;set;}=new List<string>();
}