import { Router, Request, Response, NextFunction } from 'express';
import { PinterestApi } from './api.ts';
import { PinterestConfig } from './types.ts';

// 统一响应格式
const sendResponse = (res: Response, data: any) => {
  res.json({
    success: true,
    data,
    timestamp: new Date().toISOString()
  });
};

const asyncHandler = (fn: (req: Request, res: Response, next: NextFunction) => Promise<any>) => 
  (req: Request, res: Response, next: NextFunction) => {
    Promise.resolve(fn(req, res, next)).catch(next);
  };

/**
 * 创建 Pinterest 路由
 * @param config 配置对象
 */
export const createPinterestRouter = (config?: PinterestConfig) => {
  const router = Router();
  const api = new PinterestApi(config);

  // 1. Pinterest 搜索用户
  // GET /search?keyword=fashion&country=US
  router.get('/search', asyncHandler(async (req, res) => {
    const { keyword, country } = req.query;
    if (!keyword) {
      throw new Error('Keyword is required');
    }
    const result = await api.searchUsers({
      keyword: String(keyword),
      country: country ? String(country) : undefined
    });
    sendResponse(res, result);
  }));

  // 2. Pinterest 获取用户帖子
  // GET /users/posts?url=https://www.pinterest.com/username/&count=20
  router.get('/users/posts', asyncHandler(async (req, res) => {
    const { url, count } = req.query;
    if (!url) {
      throw new Error('User Profile URL is required');
    }
    const result = await api.getUserPosts({
      url: String(url),
      count: count ? Number(count) : 20
    });
    sendResponse(res, result);
  }));

  // 3. Pinterest 获取帖子评论
  // GET /posts/comments?url=https://www.pinterest.com/pin/123/
  router.get('/posts/comments', asyncHandler(async (req, res) => {
    const { url } = req.query;
    if (!url) {
      throw new Error('Post URL is required');
    }
    const result = await api.getPostComments({
      url: String(url)
    });
    sendResponse(res, result);
  }));

  return router;
};