using System;
using System.CommandLine;
using System.CommandLine.Invocation;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Wabbajack.Downloaders;
using Wabbajack.DTOs;
using Wabbajack.Hashing.xxHash64;
using Wabbajack.Paths;
using Wabbajack.Paths.IO;

namespace Wabbajack.CLI.Verbs
{
    
    public class DownloadUrl : IVerb
    {
        private readonly ILogger<DownloadUrl> _logger;
        private readonly DownloadDispatcher _dispatcher;

        public DownloadUrl(ILogger<DownloadUrl> logger, DownloadDispatcher dispatcher)
        {
            _logger = logger;
            _dispatcher = dispatcher;
        }

        public Command MakeCommand()
        {
            var command = new Command("download-url");
            command.Add(new Option<Uri>(new[] { "-u", "-url" }, "Url to parse"));
            command.Add(new Option<AbsolutePath>(new[] { "-o", "-output" }, "Output file"));
            command.Description = "Downloads a file to a given output";
            command.Handler = CommandHandler.Create(Run);
            return command;
        }

        private async Task<int> Run(Uri url, AbsolutePath output)
        {
            var parsed = _dispatcher.Parse(url);
            if (parsed == null)
            {
                _logger.LogCritical("No downloader found for {Url}", url);

                return 1;
            }

            var archive = new Archive() { State = parsed, Name = output.FileName.ToString() };
            await _dispatcher.Download(archive, output, CancellationToken.None);
            return 0;
        }
    }
}