const config = require('./config/common');

const path = require('path');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');
const yohoLib = require('yoho-node-lib');
const pkg = require('./package.json');
const devtools = require('./doraemon/middleware/devtools');
const _ = require('lodash');

let pkgJson;

// 全局注册library
yohoLib.global(config);

// 指定 doraemon, utils 目录
global.utils = path.resolve('./utils');
global.doraemon = path.resolve('./doraemon');

exports.createApp = async(app) => {
  // 向模板注入变量
  app.locals.devEnv = app.get('env') === 'development';
  app.locals.proEnv = app.get('env') === 'production';
  app.locals.version = pkg.version;

  if (config.zookeeperServer) {
    const monitor = global.yoho.monitorSender;
    const monitorType = _.get(monitor, 'type.ZOOKEEPER');

    require('yoho-zookeeper')(config.zookeeperServer, 'wap', app.locals.wap = {}, false, {
      onerror: (err) => {
        monitor.tallyFail(monitorType, {
          code: err.code,
          message: err.name
        });
      }
    });
  }

  if (!app.locals.devEnv) {
    pkgJson = require(`./pkg-${pkg.version}.json`);
  }

  app.use('/grass/node/status.html', (req, res) => {
    res.status(200).end();
  });
  app.head('*', (req, res) => {
    res.status(200).end();
  });
  app.get('/grass/pkg.json', (req, res) => {
    res.set({
      'Cache-Control': 'no-cache',
      Pragma: 'no-cache',
      Expires: (new Date(1900, 0, 1, 0, 0, 0, 0)).toUTCString()
    });
    res.send(pkgJson);
  });

  app.use(require('./doraemon/middleware/backlist'));

  const logger = global.yoho.logger;

  if (app.locals.devEnv) {
    app.use(devtools());
  }

  app.use((req, res, next) => {
    req.isApmReport = app.locals.proEnv;
    next();
  });

  // 添加请求上下文
  app.use(global.yoho.httpCtx());

  app.use(global.yoho.hbs({
    extname: '.hbs',
    defaultLayout: 'layout',

    layoutsDir: path.join(__dirname, 'doraemon/views'),
    partialsDir: path.join(__dirname, 'doraemon/views/partial'),
    views: path.join(__dirname, 'doraemon/views'),
    helpers: _.assign(global.yoho.helpers, require('./utils/helpers'))
  }));

  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({
    extended: true
  }));
  app.use(cookieParser());

  require('./doraemon/middleware/yoho-session')(app);

  // dispatcher
  try {
    const corsMiddleware = require('./doraemon/middleware/cors');
    const userMiddleware = require('./doraemon/middleware/user');
    const setYohoDataMiddleware = require('./doraemon/middleware/set-yoho-data');
    const errorMiddleware = require('./doraemon/middleware/error-handler');
    const ssrApiMiddleware = require('./doraemon/middleware/ssr-api');
    const ssrRouteMiddleware = require('./doraemon/middleware/ssr');
    const qiniuMiddleware = require('./doraemon/middleware/qiniu');

    // YOHO 前置中间件
    app.use(corsMiddleware);
    app.use(setYohoDataMiddleware);
    app.use(userMiddleware);

    app.options('*', (req, res) => {
      res.status(200).end();
    });
    if (!app.locals.proEnv) {
      app.use((req, res, next) => {
        if (/cordova/.test(req.url)) {
          return res.status(404).end();
        }
        return next();
      });
      app.use('/favicon.ico', (req, res) => {
        res.send('');
      });
      app.use('/passport/login/user', (req, res) => {
        let result = {
          code: 403,
          message: '未登录',
          data: ''
        };

        if (req.user.uid) {
          result.code = 200;
          result.message = '已登录';
          result.data = req.user.uid.toString();
        }
        res.jsonp(result);
      });
    }
    app.get('/grass/getToken', qiniuMiddleware.getToken);
    app.use('/grass', ssrApiMiddleware);

    app.use(ssrRouteMiddleware.routers);

    app.all('*', ssrRouteMiddleware.ssrRender); // 404

    // YOHO 后置中间件
    app.use(errorMiddleware.serverError);

    // listener
    app.listen(config.port, function() {
      logger.info(`worker is started at http://localhost:${config.port}`);
    });
  } catch (err) {
    logger.error(err);
    process.exit(1); //eslint-disable-line
  }

};