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');

// 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;

  app.use('/node/status.html', (req, res) => {
    res.status(200).end();
  });

  const logger = global.yoho.logger;

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


  // 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 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');

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

};