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

'use strict';

const DTP_COMPONENT_NAME = 'home';

const express = require('express');

const moment = require('moment');

const { SiteController, SiteError } = 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 = this.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/embed', this.getPublicProfileEmbed.bind(this));
    router.get('/:username/json', this.getPublicProfileJSON.bind(this));
    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 getPublicProfileEmbed (req, res, next) {
    const { link: linkService, user: userService } = this.dtp.services;
    try {
      this.log.debug('profile request', { url: req.url });
      if (!res.locals.userProfile) {
        return next(new SiteError(404, 'Member profile not found'));
      }

      res.locals.currentView = 'profile-embed';

      res.locals.pageTitle = `${res.locals.userProfile.displayName || res.locals.userProfile.username} | ${this.dtp.config.site.name}`;
      res.locals.pageDescription = res.locals.userProfile.bio || this.dtp.config.site.description;

      res.locals.pagination = this.getPaginationParameters(req, 20);
      res.locals.links = await linkService.getForUser(res.locals.userProfile, res.locals.pagination);

      await userService.recordProfileView(res.locals.userProfile, req);

      res.render('profile/embed');
    } catch (error) {
      this.log.error('failed to display landing page', { error });
      return next(error);
    }
  }

  async getPublicProfileJSON (req, res) {
    const { link: linkService, user: userService } = this.dtp.services;
    try {
      this.log.debug('profile request', { url: req.url });
      if (!res.locals.userProfile) {
        throw new SiteError(404, 'Member profile not found');
      }

      res.locals.currentView = 'profile-embed';

      res.locals.pageTitle = `${res.locals.userProfile.displayName || res.locals.userProfile.username} | ${this.dtp.config.site.name}`;
      res.locals.pageDescription = res.locals.userProfile.bio || this.dtp.config.site.description;

      res.locals.pagination = this.getPaginationParameters(req, 20);
      res.locals.links = await linkService.getForUser(res.locals.userProfile, res.locals.pagination);

      await userService.recordProfileView(res.locals.userProfile, req);

      if (res.locals.userProfile.picture) {
        if (res.locals.userProfile.picture.large) {
          res.locals.userProfile.picture.large = this.makeSiteLink(`/image/${res.locals.userProfile.picture.large._id}`);
        }
        if (res.locals.userProfile.picture.small) {
          res.locals.userProfile.picture.small = this.makeSiteLink(`/image/${res.locals.userProfile.picture.small._id}`);
        }
      }
      if (res.locals.userProfile.header) {
        res.locals.userProfile.header = this.makeSiteLink(`/image/${res.locals.userProfile.header._id}`);
      }

      delete res.locals.userProfile._id;
      res.locals.userProfile.createdText = moment(res.locals.userProfile.created).fromNow();

      res.locals.links.forEach((link) => {
        link.href = this.makeSiteLink(`/link/${link._id}/visit`);
      });

      res.status(200).json({
        success: true,
        user: res.locals.userProfile,
        links: res.locals.links,
      });
    } catch (error) {
      this.log.error('failed to display landing page', { error });
      return res.status(error.statusCode || 500).json({
        success: false,
        message: error.message,
      });
    }
  }

  makeSiteLink (url) {
    return `https://${this.dtp.config.site.domain}${url}`;
  }

  async getPublicProfile (req, res, next) {
    const { link: linkService, user: userService } = this.dtp.services;
    try {
      this.log.debug('profile request', { url: req.url });
      if (!res.locals.userProfile) {
        return next(new SiteError(404, 'Member profile not found'));
      }

      res.locals.currentView = 'public-profile';

      res.locals.pageTitle = `${res.locals.userProfile.displayName || res.locals.userProfile.username} | ${this.dtp.config.site.name}`;
      res.locals.pageDescription = res.locals.userProfile.bio || this.dtp.config.site.description;

      res.locals.pagination = this.getPaginationParameters(req, 100);
      res.locals.links = await linkService.getForUser(res.locals.userProfile, res.locals.pagination);

      await userService.recordProfileView(res.locals.userProfile, req);

      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, 100);
      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 = {
  slug: 'home',
  name: 'home',
  isHome: true,
  create: async (dtp) => {
    let controller = new HomeController(dtp);
    return controller;
  },
};