using Newtonsoft.Json;
using System.Linq;
using System.Diagnostics;

namespace ttrss_co_client
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var conf = Configure();
            var ttrssClient = new ttrss.ApiClient(conf.BaseURI);
            await ttrssClient.Login(conf.Username, conf.Password);

            var loggedin = await ttrssClient.IsLoggedIn();
            Console.WriteLine($"logged in: {loggedin}");

            var doneLabelCaption = conf.CopilotDoneCaption.ToLower();

            var miscTasks = new List<Task>();
            var unreadFeeds = await ttrssClient.GetFeeds(cat_id: -3, unread_only: true);
            foreach (var uf in unreadFeeds)
            {
                var actionForFeed = conf.feedActions.FirstOrDefault(fa => fa.feedurl == uf.feed_url.ToString());
                if (actionForFeed != null)
                {
                    var headlines = await ttrssClient.GetHeadlines(uf.id, view_mode: ttrss.ApiClient.VIEWMODE.Unread);
                    foreach (var hl in headlines)
                    {
                        var doneLabel = (await ttrssClient.GetLabels(hl.id)).First(l => l.caption?.ToLower() == doneLabelCaption);
                        if (!doneLabel.@checked)
                        {
                            var noteString = hl.note;
                            if (!string.IsNullOrWhiteSpace(noteString))
                            {
                                noteString += $"{hl.note}\n";
                            }
                            switch (actionForFeed.command)
                            {
                                case "dl":
                                    var tr = await standardDL(hl.link.ToString());
                                    miscTasks.Add(ttrssClient.UpdateArticleNote($"[{DateTime.Now.ToLongTimeString()}] - {tr.Item2}", hl.id));
                                    if (tr.Item1 == true)
                                    {
                                        miscTasks.Add(ttrssClient.SetArticleLabel(doneLabel.id, true, hl.id));
                                    }
                                    break;
                                default:
                                    noteString += $"[{DateTime.Now.ToLongTimeString()}] - feed configured but action not recognized";
                                    miscTasks.Add(ttrssClient.SetArticleLabel(doneLabel.id, true, hl.id));
                                    break;
                            }
                            miscTasks.Add(ttrssClient.UpdateArticleNote(noteString, hl.id));
                        }
                    }
                }
            }


            miscTasks.Add(ttrssClient.Logout());
            Console.WriteLine($"awaiting remaining tasks");
            Task.WaitAll(miscTasks.ToArray());
            Console.WriteLine($"done");
        }
        static Configuration Configure(string configurationPath = "appsettings.json")
        {
            if (!File.Exists(configurationPath))
            {
                Console.Error.WriteLine($"could not find configuration at {configurationPath}! copying sample to that spot.");
                File.Copy("sample-appsettings.json", configurationPath); //and you know what, if that explodes at the OS level, the OS should give you an error
                return null;
            }
            var fileContents = File.ReadAllText(configurationPath);
            if (string.IsNullOrWhiteSpace(fileContents))
            {
                Console.Error.WriteLine($"configuration file at {configurationPath} was empty! overwriting with sample settings.");
                File.Copy("sample-appsettings.json", configurationPath, true);
                return null;
            }

            var conf = JsonConvert.DeserializeObject<Configuration>(fileContents);

            if (conf == null)
            {
                Console.Error.WriteLine($"configuration file at {configurationPath} was empty! overwriting with sample settings.");
                File.Copy("sample-appsettings.json", configurationPath, true);
                return null;
            }

            return conf;
        }

        private static async Task<Tuple<bool, string>> standardDL(string articleLink)
        {
            var ytdl = new YoutubeDLSharp.YoutubeDL();
            ytdl.YoutubeDLPath = "yt-dlp";
            ytdl.FFmpegPath = "ffmpeg";
            ytdl.OutputFolder = "./tmp/";
            ytdl.OutputFileTemplate = "%(upload_date)s - %(title)s - [%(id)s].mp4";
            var sw = new Stopwatch();
            //  var data = await ytdl.RunVideoDataFetch(articleLink);
            // if (data.Data.ReleaseDate != null && data.Data.ReleaseDate > DateTime.Now)
            // {
            //     return new Tuple<bool, string>(false, $"release date in future? {data.Data.ReleaseDate}");
            // }
            sw.Start();
            var res = await ytdl.RunVideoDownload(articleLink);
            sw.Stop();
            var outputStr = $"{(res.Success ? "Success" : "fail")} in {sw.Elapsed}";
            if(res.ErrorOutput != null && res.ErrorOutput.Length > 0)
            {
                outputStr += "\n" + string.Join('\n', res.ErrorOutput);
            }
            return new Tuple<bool, string>(res.Success, outputStr);
        }
    }
}