using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using CommandLine;
using CommandLine.Text;
using System.IO;

namespace TaskRunner
{
    public class Options
    {
        [Option("server", HelpText="Task source server", Required = true)]
        public string server { get; set; }

        [HelpOption]
        public string GetUsage()
        {
            return HelpText.AutoBuild(this, (HelpText current) => HelpText.DefaultParsingErrorsHandler(this, current));
        }
    }
    public class Program
    {
        public static int Main(string[] args)
        { 
            MainAsync(args).Wait();
            return 0;
        }

        static async Task MainAsync(string[] args)
        {
            var options = new Options();
            if (Parser.Default.ParseArguments(args, options))
            {
                Console.WriteLine($"Waiting for tasks from server: {options.server}");
                var server = new ServerApi(new Uri(options.server));
                try
                {
                    var taskManager = new TaskManager();
                    var task = await server.GetTask();
                    var src = await server.GetStream("asdf", task.SourceStreamId);
                    var dest = await server.GetStream("asdf", task.DestinationStreamId);
                    Console.WriteLine($"Got task {task.TaskId}");
                    Console.WriteLine($"Source: {src.MimeType}");
                    Console.WriteLine($"Dest: {dest.MimeType}");
                    var mp4Parts = new List<string>();
                    foreach (var strUri in src.Uris)
                    {
                        var uri = new Uri(strUri["Uri"]);
                        var fs = new FileStorage();// @"\Users\Arti.Zirk\Documents\files");
                        Console.WriteLine($"From location: {uri}");
                        var srcSwf = await fs.DownloadFile(uri);
                        Console.WriteLine($"Local scrSwf: {srcSwf}");
                        var justName = Path.GetFileNameWithoutExtension(srcSwf);
                        var destSwf = $"/tmp/{justName}.raw";
                        var destMp4 = $"/tmp/{justName}.mp4";
                        Console.WriteLine("RunGnash");
                        await taskManager.RunGnash(srcSwf, destSwf);
                        File.Delete(srcSwf);
                        Console.WriteLine("RunFfmpeg");
                        await taskManager.swfRawToMp4(destSwf, destMp4);
                        File.Delete(destSwf);
                        mp4Parts.Add(destMp4);
                    }
                    var outFile = $"/tmp/out.mp4";
                    await taskManager.Mp4Join(mp4Parts, outFile);
                    var location = await server.UploadFile(outFile);
                    File.Delete(outFile);
                    foreach(var file in mp4Parts)
                    {
                        File.Delete(file);
                    }
                    Console.WriteLine($"New location is {location}");
                } catch (FailedToGetTaskException) {
                    Console.WriteLine("No tasks available");
                    return;
                }
                
                //var taskManager = new TaskManager();
                //await taskManager.RunFfmpeg();
            } else {
                //Console.WriteLine(options.GetUsage());
            }
            
        }
    }
}