import path from 'path';

import express from 'express';

import { i18n } from '^/config/next-i18next.config';

import loggerFactory from '~/utils/logger';

import nextFactory from '../routes/next';

const swig = require('swig-templates');

const logger = loggerFactory('growi:crowi:dev');


class CrowiDev {

  /**
   * Creates an instance of CrowiDev.
   * @param {Crowi} crowi
   *
   * @memberOf CrowiDev
   */
  constructor(crowi) {
    this.crowi = crowi;
  }

  init() {
    this.requireForAutoReloadServer();

    this.initPromiseRejectionWarningHandler();
  }

  initPromiseRejectionWarningHandler() {
    // https://qiita.com/syuilo/items/0800d7e44e93203c7285
    process.on('unhandledRejection', console.dir); // eslint-disable-line no-console
  }

  /**
   * require files for node-dev auto reloading
   */
  requireForAutoReloadServer() {
    // load all json files for live reloading
    i18n.locales
      .forEach((localeId) => {
        require(path.join(this.crowi.publicDir, 'static/locales', localeId, 'translation.json'));
      });
  }

  /**
   *
   * @param {any} app express
   */
  setupServer(app) {
    const port = this.crowi.port;
    let server = app;

    this.setupExpressBeforeListening(app);

    // for log
    let serverUrl = `http://localhost:${port}}`;

    if (this.crowi.env.DEV_HTTPS) {
      logger.info(`[${this.crowi.node_env}] Express server will start with HTTPS Self-Signed Certification`);

      serverUrl = `https://localhost:${port}}`;

      const fs = require('graceful-fs');
      const https = require('https');

      const options = {
        key: fs.readFileSync(path.join(this.crowi.rootDir, './resource/certs/localhost/key.pem')),
        cert: fs.readFileSync(path.join(this.crowi.rootDir, './resource/certs/localhost/cert.pem')),
      };

      server = https.createServer(options, app);
    }

    const eazyLogger = require('eazy-logger').Logger({
      prefix: '[{green:GROWI}] ',
      useLevelPrefixes: false,
    });

    eazyLogger.info('{bold:Server URLs:}');
    eazyLogger.unprefixed('info', '{grey:=======================================}');
    eazyLogger.unprefixed('info', `         APP: {magenta:${serverUrl}}`);
    eazyLogger.unprefixed('info', '{grey:=======================================}');

    return server;
  }

  setupExpressBeforeListening(app) {
    this.setupNextBundleAnalyzer(app);
  }

  setupExpressAfterListening(app) {
    // this.setupBrowserSync(app);
    this.setupWebpackHmr(app);
    this.setupNextjsStackFrame(app);
  }

  // setupHeaderDebugger(app) {
  //   logger.debug('setupHeaderDebugger');

  //   app.use((req, res, next) => {
  //     onHeaders(res, () => {
  //       logger.debug('HEADERS GOING TO BE WRITTEN');
  //     });
  //     next();
  //   });
  // }

  // setupBrowserSync(app) {
  //   logger.debug('setupBrowserSync');

  //   const browserSync = require('browser-sync');
  //   const bs = browserSync.create().init({
  //     logSnippet: false,
  //     notify: false,
  //     files: [
  //       `${this.crowi.viewsDir}/**/*.html`,
  //       `${this.crowi.publicDir}/**/*.js`,
  //       `${this.crowi.publicDir}/**/*.css`,
  //     ],
  //   });
  //   app.use(require('connect-browser-sync')(bs));
  // }

  setupNextBundleAnalyzer(app) {
    const next = nextFactory(this.crowi);
    app.use('/analyze', express.static(path.resolve(__dirname, '../../../.next/analyze')));
  }

  setupWebpackHmr(app) {
    const next = nextFactory(this.crowi);
    app.all('/_next/webpack-hmr', next.delegateToNext);
  }

  setupNextjsStackFrame(app) {
    const next = nextFactory(this.crowi);
    app.get('/__nextjs_original-stack-frame', next.delegateToNext);
  }

}

module.exports = CrowiDev;