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

'use strict';

const express = require('express');

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

class ChatController extends SiteController {

  constructor (dtp) {
    super(dtp, module.exports);
  }

  async start ( ) {
    const {
      chat: chatService,
      limiter: limiterService,
      session: sessionService,
    } = this.dtp.services;

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

    router.use(
      sessionService.authCheckMiddleware({ requireLogin: true }),
      chatService.middleware({ maxOwnedRooms: 25, maxJoinedRooms: 50 }),
      async (req, res, next) => {
        res.locals.currentView = 'chat';
        return next();
      },
    );

    router.param('roomId', this.populateRoomId.bind(this));

    router.post(
      '/:roomId',
      limiterService.create(limiterService.config.chat.postRoomUpdate),
      this.postRoomUpdate.bind(this),
    );

    router.post(
      '/',
      limiterService.create(limiterService.config.chat.postRoomCreate),
      this.postRoomCreate.bind(this),
    );

    router.get(
      '/:roomId',
      limiterService.create(limiterService.config.chat.getRoomView),
      this.getRoomView.bind(this),
    );

    router.get(
      '/',
      limiterService.create(limiterService.config.chat.getHome),
      this.getHome.bind(this),
    );

    return router;
  }

  async populateRoomId (req, res, next, roomId) {
    const { chat: chatService } = this.dtp.services;
    try {
      res.locals.room = await chatService.getRoomById(roomId);
      if (!res.locals.room) {
        throw new SiteError(404, 'Room not found');
      }
      return next();
    } catch (error) {
      this.log.error('failed to populate roomId', { roomId, error });
      return next(error);
    }
  }

  async postRoomUpdate (req, res, next) {
    const { chat: chatService } = this.dtp.services;
    try {
      res.locals.room = await chatService.updateRoom(res.locals.room, req.body);
      res.redirect(`/chat/${res.locals.room._id}`);
    } catch (error) {
      this.log.error('failed to update chat room', { roomId: res.locals.room._id, error });
      return next(error);
    }
  }

  async postRoomCreate (req, res, next) {
    const { chat: chatService } = this.dtp.services;
    try {
      res.locals.room = await chatService.createRoom(req.user, req.body);
      res.redirect(`/chat/${res.locals.room._id}`);
    } catch (error) {
      this.log.error('failed to create chat room', { error });
      return next(error);
    }
  }

  async getRoomView (req, res, next) {
    const { chat: chatService } = this.dtp.services;
    try {
      res.locals.pageTitle = res.locals.room.name;

      const pagination = { skip: 0, cpp: 20 };
      res.locals.chatMessages = await chatService.getChannelHistory(res.locals.room, pagination);

      res.render('chat/view');
    } catch (error) {
      this.log.error('failed to render chat room view', { roomId: req.params.roomId, error });
      return next(error);
    }
  }

  async getHome (req, res) {
    res.locals.pageTitle = 'Chat Home';
    res.render('chat/index');
  }
}

module.exports = {
  slug: 'chat',
  name: 'chat',
  create: async (dtp) => { return new ChatController(dtp); },
};