const { post } = require("../../utils/api");
const { loginWithWeChat, saveSession } = require("../../utils/auth");

Page({
  data: {
    loading: false,
    mode: "login",
    isLoginMode: true,
    isActivateMode: false,
    isBindCurrentMode: false,
    loginMethod: "wechat",
    isWechatLogin: true,
    isEmailLogin: false,
    bindingRequired: false,
    currentBindingRequired: false,
    bindToken: "",
    inviteCode: "",
    studentId: "",
    email: "",
    password: ""
  },

  switchLoginMethod(event) {
    const method = event.currentTarget.dataset.method;
    this.setData({
      loginMethod: method,
      isWechatLogin: method === "wechat",
      isEmailLogin: method === "email"
    });
  },

  async loginWithWechatTap() {
    this.setData({ loading: true });
    try {
      const res = await loginWithWeChat();
      if (!res.binding_required && res.token && res.user) {
        saveSession(res.token, res.user);
        wx.switchTab({ url: "/pages/home/index" });
        return;
      }
      this.setData({
        mode: "activate",
        isLoginMode: false,
        isActivateMode: true,
        isBindCurrentMode: false,
        bindingRequired: true,
        currentBindingRequired: false,
        bindToken: res.bind_token || ""
      });
    } catch (error) {
      wx.showToast({ title: error.message || "微信登录失败", icon: "none" });
    } finally {
      this.setData({ loading: false });
    }
  },

  onEmailInput(event) {
    this.setData({ email: event.detail.value.trim() });
  },

  onPasswordInput(event) {
    this.setData({ password: event.detail.value });
  },

  async loginWithEmail() {
    if (!this.data.email || !this.data.password) {
      wx.showToast({ title: "请输入邮箱和密码", icon: "none" });
      return;
    }
    this.setData({ loading: true });
    try {
      const res = await post("/api/auth/login", {
        email: this.data.email,
        password: this.data.password
      });
      saveSession(res.token, res.user);
      if (!res.user.wechat_bound || !res.user.phone) {
        this.setData({
          mode: "bind-current",
          isLoginMode: false,
          isActivateMode: false,
          isBindCurrentMode: true,
          currentBindingRequired: true,
          bindingRequired: false
        });
        return;
      }
      wx.switchTab({ url: "/pages/home/index" });
    } catch (error) {
      wx.showToast({ title: error.message || "邮箱登录失败", icon: "none" });
    } finally {
      this.setData({ loading: false });
    }
  },

  onInviteCodeInput(event) {
    this.setData({ inviteCode: event.detail.value.trim().toUpperCase() });
  },

  onStudentIdInput(event) {
    this.setData({ studentId: event.detail.value.trim() });
  },

  async bindWithPhone(event) {
    const phoneCode = event.detail?.code;
    if (!phoneCode) {
      wx.showToast({ title: "需要授权手机号完成绑定", icon: "none" });
      return;
    }
    if (!this.data.inviteCode || !this.data.studentId) {
      wx.showToast({ title: "请填写邀请码和学号", icon: "none" });
      return;
    }
    this.setData({ loading: true });
    try {
      const res = await post("/api/wechat/bind", {
        bind_token: this.data.bindToken,
        invite_code: this.data.inviteCode,
        student_id: this.data.studentId,
        phone_code: phoneCode
      });
      saveSession(res.token, res.user);
      wx.switchTab({ url: "/pages/home/index" });
    } catch (error) {
      wx.showToast({ title: error.message || "绑定失败", icon: "none" });
    } finally {
      this.setData({ loading: false });
    }
  },

  bindCurrentWithPhone(event) {
    const phoneCode = event.detail?.code;
    if (!phoneCode) {
      wx.showToast({ title: "需要授权手机号完成绑定", icon: "none" });
      return;
    }
    this.setData({ loading: true });
    wx.login({
      success: async ({ code }) => {
        try {
          const res = await post("/api/wechat/bind-current", {
            code,
            phone_code: phoneCode
          });
          saveSession(res.token, res.user);
          wx.switchTab({ url: "/pages/home/index" });
        } catch (error) {
          wx.showToast({ title: error.message || "绑定失败", icon: "none" });
        } finally {
          this.setData({ loading: false });
        }
      },
      fail: () => {
        this.setData({ loading: false });
        wx.showToast({ title: "微信登录失败", icon: "none" });
      }
    });
  },

  skipCurrentBinding() {
    wx.switchTab({ url: "/pages/home/index" });
  },

  backToLogin() {
    this.setData({
      mode: "login",
      isLoginMode: true,
      isActivateMode: false,
      isBindCurrentMode: false,
      loginMethod: "wechat",
      isWechatLogin: true,
      isEmailLogin: false,
      bindingRequired: false,
      currentBindingRequired: false,
      bindToken: ""
    });
  }
});