// backend/src/worker.ts
export interface Env {
  DB: D1Database;
  API_KEY: string;       // 项目 API Key — 用于所有 auth 接口认证
  PROJECT_NAME: string;  // 项目名 — 所有 auth 接口必须同时传递
  BASE_URL?: string;     // 可选，默认 https://pinme.cloud
}

type ApiEnvelope<T> = {
  code: number   // 200=成功，其他=失败
  msg: string    // "ok" | "fail" | "invalid param"
  data: T
}

type ApiErrorData = { error?: string }

type UserInfo = {
  uid: string
  email: string
  display_name: string
  photo_url?: string
  disabled: boolean
  email_verified: boolean
}

{ "email": "alice@example.com", "password": "Test@12345678", "display_name": "Alice" }

async function createAuthUser(
  env: Env,
  payload: { email: string; password: string; display_name?: string }
): Promise<{ user?: UserInfo; error?: string }> {
  const baseUrl = env.BASE_URL ?? 'https://pinme.cloud';
  const resp = await fetch(
    `${baseUrl}/api/v1/auth/create_user?project_name=${encodeURIComponent(env.PROJECT_NAME)}`,
    {
      method: 'POST',
      headers: { 'X-API-Key': env.API_KEY, 'Content-Type': 'application/json' },
      body: JSON.stringify(payload),
    }
  );
  const result = await resp.json() as ApiEnvelope<UserInfo | ApiErrorData>;
  if (!resp.ok || result.code !== 200) {
    return { error: (result.data as ApiErrorData)?.error ?? result.msg };
  }
  return { user: result.data as UserInfo };
}

{ "id_token": "eyJhbGciOiJSUzI1NiIsImtpZCI6..." }

type VerifyTokenData = {
  uid: string
  email?: string
  tenant_id: string
  claims: Record<string, unknown>
}

async function verifyAuthToken(
  env: Env,
  idToken: string
): Promise<{ uid?: string; email?: string; error?: string; emailNotVerified?: boolean }> {
  const baseUrl = env.BASE_URL ?? 'https://pinme.cloud';
  const resp = await fetch(
    `${baseUrl}/api/v1/auth/verify_token?project_name=${encodeURIComponent(env.PROJECT_NAME)}`,
    {
      method: 'POST',
      headers: { 'X-API-Key': env.API_KEY, 'Content-Type': 'application/json' },
      body: JSON.stringify({ id_token: idToken }),
    }
  );
  const result = await resp.json() as ApiEnvelope<VerifyTokenData | ApiErrorData>;
  if (!resp.ok || result.code !== 200) {
    const error = (result.data as ApiErrorData)?.error ?? result.msg;
    return { error, emailNotVerified: resp.status === 403 };
  }
  const data = result.data as VerifyTokenData;
  return { uid: data.uid, email: data.email };
}

async function getAuthUser(env: Env, uid: string): Promise<{ user?: UserInfo; error?: string }> {
  const baseUrl = env.BASE_URL ?? 'https://pinme.cloud';
  const resp = await fetch(
    `${baseUrl}/api/v1/auth/user?project_name=${encodeURIComponent(env.PROJECT_NAME)}&uid=${encodeURIComponent(uid)}`,
    { method: 'GET', headers: { 'X-API-Key': env.API_KEY } }
  );
  const result = await resp.json() as ApiEnvelope<UserInfo | ApiErrorData>;
  if (!resp.ok || result.code !== 200) {
    return { error: (result.data as ApiErrorData)?.error ?? result.msg };
  }
  return { user: result.data as UserInfo };
}

async function listAuthUsers(
  env: Env,
  options: { pageToken?: string; maxResults?: number } = {}
): Promise<{ users?: UserInfo[]; nextPageToken?: string; error?: string }> {
  const baseUrl = env.BASE_URL ?? 'https://pinme.cloud';
  const url = new URL('/api/v1/auth/list_users', baseUrl);
  url.searchParams.set('project_name', env.PROJECT_NAME);
  if (options.pageToken) url.searchParams.set('page_token', options.pageToken);
  if (options.maxResults) url.searchParams.set('max_results', String(options.maxResults));

  const resp = await fetch(url.toString(), { method: 'GET', headers: { 'X-API-Key': env.API_KEY } });
  const result = await resp.json() as ApiEnvelope<{ users: UserInfo[]; next_page_token?: string } | ApiErrorData>;
  if (!resp.ok || result.code !== 200) {
    return { error: (result.data as ApiErrorData)?.error ?? result.msg };
  }
  const data = result.data as { users: UserInfo[]; next_page_token?: string };
  return { users: data.users, nextPageToken: data.next_page_token };
}

// 批量遍历所有用户示例
async function* iterAllUsers(env: Env) {
  let pageToken: string | undefined;
  do {
    const { users, nextPageToken, error } = await listAuthUsers(env, { pageToken, maxResults: 1000 });
    if (error) throw new Error(error);
    for (const user of users ?? []) yield user;
    pageToken = nextPageToken;
  } while (pageToken);
}

import { initializeApp } from 'firebase/app'
import {
  type Auth,
  getAuth,
  GoogleAuthProvider,
  signInWithEmailAndPassword,
  signInWithPopup,
} from 'firebase/auth'

type PublicClientConfig = {
  tenant_id: string
  auth_api_key: string
  auth_domain: string
  auth_project_id: string
}

export function createProjectAuth(config: PublicClientConfig): Auth {
  const app = initializeApp({
    apiKey: config.auth_api_key,
    authDomain: config.auth_domain,
    projectId: config.auth_project_id,
  })
  const auth = getAuth(app)
  auth.tenantId = config.tenant_id  // 必须设置，确保 token 归属正确租户
  return auth
}

// 邮箱密码登录，返回 id_token
export async function loginWithEmail(auth: Auth, email: string, password: string): Promise<string> {
  const credential = await signInWithEmailAndPassword(auth, email, password)
  return credential.user.getIdToken()
}

// Google 登录，返回 id_token
export async function loginWithGoogle(auth: Auth): Promise<string> {
  const credential = await signInWithPopup(auth, new GoogleAuthProvider())
  return credential.user.getIdToken()
}

// 用法示例
// pinme create 会自动将 public_client_config 写入 frontend/src/utils/config.ts
import { public_client_config } from '../utils/config'

const auth = createProjectAuth(public_client_config)
const idToken = await loginWithGoogle(auth)
// 然后把 idToken 发给自己的 Worker，由 Worker 调用 verify_token