// home.js
// Copyright (C) 2021 Digital Telepresence, LLC
// License: Apache-2.0

'use strict';

const DTP_COMPONENT_NAME = 'home';

const express = require('express');

const { SiteController } = require('../../lib/site-lib');

class HomeController extends SiteController {

  constructor (dtp) {
    super(dtp, DTP_COMPONENT_NAME);
  }

  async start ( ) {
    const { dtp } = this;
    const { limiter: limiterService, sidebar: sidebarService } = dtp.services;

    const router = express.Router();
    dtp.app.use('/', router);

    router.param('username', this.populateUsername.bind(this));

    router.use(async (req, res, next) => {
      res.locals.currentView = 'home';
      return next();
    });

    router.get('/:username',
      limiterService.create(limiterService.config.home.getPublicProfile),
      this.getPublicProfile.bind(this),
    );

    router.get('/',
      limiterService.create(limiterService.config.home.getHome),
      sidebarService.middleware(),
      this.getHome.bind(this),
    );
  }

  async populateUsername (req, res, next, username) {
    const { user: userService } = this.dtp.services;
    try {
      res.locals.userProfile = await userService.getPublicProfile(username);
      return next();
    } catch (error) {
      this.log.error('failed to populate username', { username, error });
      return next(error);
    }
  }

  async getPublicProfile (req, res, next) {
    const { link: linkService } = this.dtp.services;
    try {
      this.log.debug('profile request', { url: req.url });
      if (!res.locals.userProfile) {
        return next();
      }
      res.locals.currentView = 'public-profile';
      res.locals.pagination = this.getPaginationParameters(req, 20);
      res.locals.links = await linkService.getForUser(res.locals.userProfile, res.locals.pagination);
      res.render('profile/home');
    } catch (error) {
      this.log.error('failed to display landing page', { error });
      return next(error);
    }
  }

  async getHome (req, res, next) {
    const { link: linkService } = this.dtp.services;
    try {
      res.locals.pagination = this.getPaginationParameters(req, 20);
      if (req.user) {
        res.locals.links = await linkService.getForUser(req.user, res.locals.pagination);
        res.render('index-logged-in');
      } else {
        res.render('index');
      }
    } catch (error) {
      return next(error);
    }
  }
}

module.exports = async (dtp) => {
  let controller = new HomeController(dtp);
  return controller;
};