/**
 * 登录页面
 */
const request = require('../../utils/request.js');
const storage = require('../../utils/storage.js');

const app = getApp();

Page({
  data: {
    username: '',
    password: '',
    captchaCode: '',
    captchaUuid: '',
    captchaImg: '',
    captchaEnabled: false,
    loading: false,
  },

  onLoad() {
    // 检查是否已登录
    if (app.isLoggedIn()) {
      this._goToIndex();
      return;
    }
    // 获取验证码配置
    this._checkCaptcha();
  },

  /**
   * 检查验证码是否启用
   */
  async _checkCaptcha() {
    try {
      const res = await request.captchaImage();
      if (res.img) {
        this.setData({
          captchaEnabled: true,
          captchaImg: 'data:image/png;base64,' + res.img,
          captchaUuid: res.uuid,
        });
      }
    } catch (err) {
      console.log('[Login] 验证码获取失败，可能未启用');
    }
  },

  /**
   * 刷新验证码
   */
  refreshCaptcha() {
    this._checkCaptcha();
  },

  /**
   * 用户名输入
   */
  onUsernameInput(e) {
    this.setData({ username: e.detail.value });
  },

  /**
   * 密码输入
   */
  onPasswordInput(e) {
    this.setData({ password: e.detail.value });
  },

  /**
   * 验证码输入
   */
  onCaptchaInput(e) {
    this.setData({ captchaCode: e.detail.value });
  },

  /**
   * 登录
   */
  async handleLogin() {
    const { username, password, captchaCode, captchaUuid, captchaEnabled } = this.data;

    // 验证输入
    if (!username) {
      wx.showToast({ title: '请输入用户名', icon: 'none' });
      return;
    }
    if (!password) {
      wx.showToast({ title: '请输入密码', icon: 'none' });
      return;
    }
    if (captchaEnabled && !captchaCode) {
      wx.showToast({ title: '请输入验证码', icon: 'none' });
      return;
    }

    this.setData({ loading: true });

    try {
      // 登录请求
      const loginRes = await request.login(username, password, captchaCode, captchaUuid);
      const token = loginRes.token;

      // 先保存 token（重要：后续请求需要认证）
      storage.setToken(token);

      // 获取用户信息
      const infoRes = await request.getInfo();
      const user = infoRes.user;

      // 保存用户信息
      app.setLoginInfo({
        token: token,
        userId: user.userId,
        userName: user.userName,
        phonenumber: user.phonenumber,
        avatar: user.avatar,
      });

      wx.showToast({ title: '登录成功', icon: 'success' });

      // 跳转首页
      setTimeout(() => {
        this._goToIndex();
      }, 500);

    } catch (err) {
      console.error('[Login] 登录失败:', err);
      wx.showToast({
        title: err.message || '登录失败',
        icon: 'none',
      });
      // 刷新验证码
      if (this.data.captchaEnabled) {
        this._checkCaptcha();
      }
    } finally {
      this.setData({ loading: false });
    }
  },

  /**
   * 跳转首页
   */
  _goToIndex() {
    wx.reLaunch({
      url: '/pages/index/index',
    });
  },
});