using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Net.Http;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Go_Frp
{
    public partial class Login : Form
    {
        public Login()
        {
            InitializeComponent();
        }

        private void logout_but_Click(object sender, EventArgs e)
        {
            // 退出事件
            Application.Exit();
        }

        private async void login_but_Click(object sender, EventArgs e)
        {
            // 登录事件
            string username = username_text.Text;
            string password = password_text.Text;

            // 检查用户名和密码是否输入
            if (username == "" || password == "")
            {
                ts_lab.ForeColor = Color.Red;
                ts_lab.Text = "用户名或密码有误";
            }
            else
            {

                // 准备发送的数据
                var loginData = new
                {
                    username = username_text.Text,
                    password = password_text.Text
                };

                // 将数据发送到后端
                String responseMessage = await SendLoginRequestAsync("http://localhost:8080/login", loginData);

                if (responseMessage == "success")
                {
                    // 登录成功后关闭当前窗口
                    this.Close();
                }
                else
                {
                    ts_lab.ForeColor = Color.Red;
                    ts_lab.Text = "登录失败：" + responseMessage;
                }
            }
        }

        private async Task<string> SendLoginRequestAsync(string url, object data)
        {
            try
            {
                using (HttpClient client = new HttpClient())
                {
                    // 将数据转化为 JSON
                    string jsonData = JsonSerializer.Serialize(data);

                    // 创建请求
                    HttpContent content = new StringContent(jsonData, Encoding.UTF8, "application/json");

                    // 发送 Post 请求
                    HttpResponseMessage response = await client.PostAsync(url, content);

                    // 确保响应成功
                    response.EnsureSuccessStatusCode();

                    // 读取响应内容
                    string responseBody = await response.Content.ReadAsStringAsync();

                    // 返回后端消息响应。
                    return responseBody;
                }
            }
            catch (Exception ex)
            {
                // 错误处理
                return "Error: " + ex.Message;
            }
        }
    }
}