using System;
using System.Windows;
using System.Windows.Input;
using Newtonsoft.Json.Linq;

namespace YKC
{
    public partial class LoginWindow : Window
    {
        public LoginWindow()
        {
            InitializeComponent();
            txtUsername.Focus();

            KeyDown += (s, e) =>
            {
                if (e.Key == Key.Enter) Login();
            };
        }

        private async void Login_Click(object sender, RoutedEventArgs e) => Login();

        private async void Login()
        {
            string user = txtUsername.Text.Trim();
            string pass = txtPassword.Password;

            if (string.IsNullOrEmpty(user) || string.IsNullOrEmpty(pass))
            {
                txtError.Text = "请输入账号和密码";
                return;
            }

            btnLogin.IsEnabled = false;
            btnLogin.Content = "校验中...";
            txtError.Text = "";

            await System.Threading.Tasks.Task.Run(() =>
            {
                var result = UdpClientHolder.Instance.SendSync(new JObject
                {
                    ["cmd"] = Config.Cmd["LOGIN"],
                    ["username"] = user,
                    ["password"] = pass
                });

                Dispatcher.BeginInvoke(new Action(() =>
                {
                    if (result.Value<bool>("success"))
                    {
                        var mainWin = new MainWindow();
                        mainWin.SetUser(user);
                        mainWin.Show();
                        Close();
                    }
                    else
                    {
                        txtError.Text = result.Value<string>("error") ?? "账号或密码错误";
                        btnLogin.IsEnabled = true;
                        btnLogin.Content = "登 录";
                    }
                }));
            });
        }
    }
}