var express = require('express');
var router = express.Router();
const models = require('../models');
const config = require('../config/app');
const redis = require('../libs/redis');
const categories = require('../config/category');
const { tags, tagsHashMap, getTagSeoTitle, getTagSeoDescription, getTagH1Title } = require('../config/tag');
const languages = require('../config/language');
const translate = require('../config/translate');
const meta = require('../config/meta');
const utils = require('../libs/utils');
const DailyFactory = require('../models/daily-factory');
const datefns = require('date-fns');
const { format } = require('date-fns');
const { getListBuilder } = require('../libs/pager');

const CACHE_PREFIX = "tooltricks_v1";
// const CACHE_EXPIRES = 60; // 60s刷新一次
const CACHE_EXPIRES = 600;


// tools-tricks
router.get('/', function (req, res, next) {
  (async function () {


    let cacheKey = `${CACHE_PREFIX}_${req.originalUrl}`;
    let htmlData = await redis.getAsync(cacheKey);
    if (!htmlData) {
      let lang = utils.lang.ensureLanguage(req.params.lang);
      if (!req.cookies.lang || req.cookies.lang != lang) {
        res.cookie('lang', lang, config.cookie);
      }
      let title = 'titletitle';
      let description = 'description-description';

      let data = {
        title,
        description,
        languages,
        translate,
        lang,
        uri: req.originalUrl,
      };

      // 渲染EJS模板到内存中
      res.render('article', data, async (err, html) => {
        if (err) {
          // 如果渲染出错，调用next()传递错误
          return next(err);
        }

        // 渲染成功，存redis, 发送数据到客户端
        htmlData = html;
        try {
          await redis.set(cacheKey, htmlData, 'EX', CACHE_EXPIRES);
        } catch (e) {
          console.error(e);
        }

        res.send(htmlData);
      });
    } else {
      // 缓存命中， 直接发送缓存数据
      res.set({ 'X-From-Cache': 'true' });
      res.send(htmlData);
    }

  })().catch(next);

});



module.exports = router;