using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Security.AccessControl;
using System.Security.Policy;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ytdlp_gui
{
    public partial class Download : Form
    {
        public Download(string url)
        {
            ytdlp = new YTdlp();
            this.url = url;

            InitializeComponent();
        }

        private void Download_Load(object sender, EventArgs e)
        {
            // Get windows user download folder
            string user = Environment.GetEnvironmentVariable("USERNAME");
            string workdir = @"C:\Users\"+user+@"\Downloads\";

            process = ytdlp.Download(url, false, workdir);

            process.Start += (_sender, start_event) =>
            {
                lblStatus.Text = String.Format(
                    "Connecting to %s...",
                    start_event.provider
                );
            };

            process.Progress += (_sender, prog_event) =>
            {
                int progress = (int)(prog_event.progress * 100 + 0.5);
                this.Text = "Downloading - " + progress.ToString() + "%";
                lblStatus.Text = prog_event.file;
                progressBar.Value = progress;
            };

            process.Finished += (_sender, finish_event) =>
            {
                Regex regex = new Regex(@"^(.+)\s\[\w+\](\.[\w.]+)$");
                Match match = regex.Match(finish_event.file);

                if (!match.Success)
                {
                    MessageBox.Show(this, "Could not find the file we just downloaded...", "Uhhh...");
                    this.Close();
                }

                string newFile = match.Groups[1].Value + match.Groups[2].Value;

                string filePath = Path.Combine(workdir, finish_event.file);
                string newFilePath = Path.Combine(workdir, newFile);

                System.IO.File.Move(filePath, newFilePath);
                System.IO.File.SetLastWriteTime(newFilePath, DateTime.Now);

                this.Close();
            };

            // Can run in background :)
            _ = process.Run();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        protected string url;
        protected YTdlp ytdlp;
        protected YTdlpProcess process;
    }
}