/**
 * OmniCard AI (CRMmp) - 统一身份认证登录业务驱动层
 * 第一版可用骨架：不接真实 Google / Apple SDK，不伪造成功登录
 */

import { getCurrentLocale, getOmniText } from '../../common/locale.uts';
import { setAuthToken, setTenantId } from '../../common/request.uts';

export type LoginTab = 'phone' | 'email';
export type SocialProvider = 'google' | 'apple';

export type LoginCopyKey =
  | 'title'
  | 'desc'
  | 'tabPhone'
  | 'tabEmail'
  | 'countryCode'
  | 'phonePlaceholder'
  | 'sendCode'
  | 'smsCode'
  | 'login'
  | 'magicLink'
  | 'emailPlaceholder'
  | 'google'
  | 'apple'
  | 'comingSoon'
  | 'phoneRequired'
  | 'emailRequired'
  | 'codeRequired'
  | 'loginSuccess';

export type LoginState = {
  tab: LoginTab;
  countryCode: string;
  phone: string;
  smsCode: string;
  email: string;
  submitting: boolean;
  errorMessage: string;
};

function isZhLocale(): boolean {
  return getCurrentLocale() === 'zh-CN';
}

/**
 * 登录文案：能复用 locale.uts 的走词典，缺 key 时中英简单分支
 */
export function resolveLoginText(key: LoginCopyKey): string {
  if (key === 'loginSuccess') {
    return getOmniText(getCurrentLocale(), 'common.success');
  }

  const zh = isZhLocale();
  if (key === 'title') {
    return zh ? '登录 OmniCard' : 'Sign in to OmniCard';
  }
  if (key === 'tabPhone') {
    return zh ? '手机号' : 'Phone';
  }
  if (key === 'tabEmail') {
    return zh ? '邮箱' : 'Email';
  }
  if (key === 'desc') {
    return zh ? '使用国际手机号或邮箱继续' : 'Continue with your phone or email';
  }
  if (key === 'countryCode') {
    return zh ? '区号' : 'Code';
  }
  if (key === 'phonePlaceholder') {
    return zh ? '手机号' : 'Phone number';
  }
  if (key === 'sendCode') {
    return zh ? '发送验证码' : 'Send code';
  }
  if (key === 'smsCode') {
    return zh ? '验证码' : 'Verification code';
  }
  if (key === 'login') {
    return zh ? '登录' : 'Sign in';
  }
  if (key === 'magicLink') {
    return zh ? '发送登录链接' : 'Send sign-in link';
  }
  if (key === 'emailPlaceholder') {
    return zh ? '工作邮箱' : 'Work email';
  }
  if (key === 'google') {
    return zh ? '使用 Google 继续' : 'Continue with Google';
  }
  if (key === 'apple') {
    return zh ? '使用 Apple 继续' : 'Continue with Apple';
  }
  if (key === 'comingSoon') {
    return zh ? '即将开放' : 'Coming soon';
  }
  if (key === 'phoneRequired') {
    return zh ? '请填写手机号' : 'Enter your phone number';
  }
  if (key === 'emailRequired') {
    return zh ? '请填写邮箱' : 'Enter your email';
  }
  if (key === 'codeRequired') {
    return zh ? '请填写验证码' : 'Enter the verification code';
  }
  return '';
}

function toastNone(title: string): void {
  uni.showToast({
    title,
    icon: 'none',
  });
}

function canNavigateBack(): boolean {
  try {
    const pages = getCurrentPages();
    return pages != null && pages.length > 1;
  } catch (_e) {
    return false;
  }
}

function finishAfterLogin(): void {
  if (canNavigateBack()) {
    uni.navigateBack();
    return;
  }
  toastNone(resolveLoginText('loginSuccess'));
}

export function createLoginState(): LoginState {
  return {
    tab: 'phone',
    countryCode: '+86',
    phone: '',
    smsCode: '',
    email: '',
    submitting: false,
    errorMessage: '',
  };
}

export function switchLoginTab(state: LoginState, tab: LoginTab): void {
  state.tab = tab;
  state.errorMessage = '';
}

/**
 * 登录成功路径：写入 token / 可选 tenantId，再返回上一页或 toast
 */
export function completeLogin(token: string, tenantId?: string): boolean {
  const safeToken = token != null ? token.trim() : '';
  if (safeToken === '') {
    return false;
  }

  setAuthToken(safeToken);

  const safeTenant = tenantId != null ? tenantId.trim() : '';
  if (safeTenant !== '') {
    setTenantId(safeTenant);
  }

  finishAfterLogin();
  return true;
}

export function sendSmsCode(state: LoginState): boolean {
  const phone = state.phone != null ? state.phone.trim() : '';
  if (phone === '') {
    state.errorMessage = resolveLoginText('phoneRequired');
    toastNone(state.errorMessage);
    return false;
  }

  state.errorMessage = '';
  toastNone(resolveLoginText('comingSoon'));
  return false;
}

/**
 * 国际手机号验证码登录。空手机号不提交；第一版不伪造成功登录
 */
export function submitPhoneLogin(state: LoginState): boolean {
  const phone = state.phone != null ? state.phone.trim() : '';
  if (phone === '') {
    state.errorMessage = resolveLoginText('phoneRequired');
    toastNone(state.errorMessage);
    return false;
  }

  const smsCode = state.smsCode != null ? state.smsCode.trim() : '';
  if (smsCode === '') {
    state.errorMessage = resolveLoginText('codeRequired');
    toastNone(state.errorMessage);
    return false;
  }

  if (state.submitting) {
    return false;
  }

  state.errorMessage = '';
  toastNone(resolveLoginText('comingSoon'));
  return false;
}

/**
 * 邮箱 Magic Link。空邮箱不提交；第一版不伪造成功登录
 */
export function sendMagicLink(state: LoginState): boolean {
  const email = state.email != null ? state.email.trim() : '';
  if (email === '') {
    state.errorMessage = resolveLoginText('emailRequired');
    toastNone(state.errorMessage);
    return false;
  }

  if (state.submitting) {
    return false;
  }

  state.errorMessage = '';
  toastNone(resolveLoginText('comingSoon'));
  return false;
}

/**
 * Google / Apple 仅展示即将开放，不写凭证
 */
export function tapSocialLogin(_provider: SocialProvider): void {
  toastNone(resolveLoginText('comingSoon'));
}