var express = require('express'),
  router = express.Router(),
  phantom = require('phantom'),
  fs = require('fs');

router.get('/', function(req, res, next) {
  var ua = req.headers['user-agent'],
    fullUrl = req.protocol + '://' + req.get('host') + req.originalUrl,
    pattern = /Googlebot|Googlebot-News|Googlebot-Image|Googlebot-Video|Googlebot-Mobile|Mediapartners-Google|Mediapartners|AdsBot-Google|AdsBot-Google-Mobile-Apps/i,
    isRobot = pattern.test(ua);

  if (isRobot) {
    var sitepage = null,
      phInstance = null;

    phantom
      .create()
      .then(function(instance) {
        phInstance = instance;
        return instance.createPage();
      })
      .then(function(page) {
        sitepage = page;
        return page.open(fullUrl);
      })
      .then(function(status) {
        return sitepage.property('content');
      })
      .then(function(content) {
        res.send(content);
        sitepage.close();
        phInstance.exit();
      })
      .catch(function(error) {
        console.log(error);
        phInstance.exit();
      });
  } else {
    res.render('system', {
      title: '吃什麼，どっち',
      description:
        '今天吃飯，該吃什麼好呢？只要輸入美食欲望，立刻給你最真實、現場、生活化的評價，找餐廳再也不煩惱，就讓吃什麼，どっち幫你決定吃什麼！',
    });
  }
});

router.post('/getInfo', function(req, res, next) {
  res.json({
    isSuccess: true,
    response:
      '今天吃飯，該吃什麼好呢？只要輸入美食欲望，立刻給你最真實、現場、生活化的評價，找餐廳再也不煩惱，就讓吃什麼，どっち幫你決定吃什麼！',
  });
});

module.exports = router;