using Plane.Logging;
using System;
using System.Net;

namespace Plane.Windows
{
    public class UpdateChecker
    {
        private ILogger _logger;

        public UpdateChecker(string urlToCheckUpdate, ILogger logger)
        {
            this.Url = urlToCheckUpdate;
            _logger = logger;
        }

        public Version LatestVersion { get; set; }

        public string Url { get; set; }

        public void CheckAsync(Action<Version> completedCallback)
        {
            using (var client = new WebClient())
            {
                client.DownloadStringCompleted += (s, e) =>
                {
                    try
                    {
                        if (e.Result.Length > 128)
                        {
                            // 这么长，肯定是假的。
                            return;
                        }
                        LatestVersion = Version.Parse(e.Result.Split('_')[0]);
                        completedCallback?.Invoke(LatestVersion);
                    }
                    catch (Exception ex)
                    {
                        _logger.Log(ex);
                    }
                };
                client.DownloadStringAsync(new Uri(Url));
            }
        }
    }
}