// hive.js
// Copyright (C) 2022 DTP Technologies, LLC
// License: Apache-2.0

'use strict';

const mongoose = require('mongoose');

const UserSubscription = mongoose.model('UserSubscription');

const slug = require('slug');

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

class HiveService extends SiteService {

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

  async subscribe (user, client, emitterId) {
    await UserSubscription.updateOne(
      { user: user._id },
      {
        $addToSet: {
          subscriptions: {
            client: client._id,
            emitterId,
          },
        },
      },
      {
        upsert: true,
      },
    );
  }

  async unsubscribe (user, subscription) {
    await UserSubscription.updateOne(
      { user: user._id },
      { $pull: { subscriptions: subscription } },
    );
  }

  extractHashtags (content) {
    const hashtags = content
      .split(/ \r\n/g)
      .filter((tag) => tag[0] === '#')
      .map((tag) => slug(tag.slice(1)))
    ;
    return hashtags;
  }

  extractLinks (content) {
    let links = content
      .split(/( |\r|\n)/g)
      .filter((tag) => {
        const test = tag.trim().toLowerCase();
        return test.startsWith('http://') || test.startsWith('https://');
      });

    return links;
  }

  async resolveLink (author, url) {
    const jobData = {
      authorType: author.type,
      author: author._id,
      url,
    };
    this.log.info('creating job to resolve link', { jobData });
    await this.resolver.add('resolve-link', jobData);
  }

  async processKaleidoscopeEvent (event) {
    const {
      userNotification: userNotificationService,
      oauth2: oauth2Service,
    } = this.dtp.services;

    const client = await oauth2Service.getClientByDomainKey(event.source.site.domainKey);
    if (!client) {
      throw new SiteError(403, 'Unknown client domain key');
    }

    await UserSubscription
      .find({
        'subscriptions.client': client._id,
        'subscriptions.emitterId': event.source.emitter._id,
      })
      .select('-subscriptions')
      .cursor()
      .eachAsync(async (subscription) => {
        await userNotificationService.create(subscription.user, event);
      }, 3);

    this.emit('kaleidoscope:event', event, client);
  }
}

module.exports = {
  slug: 'hive',
  name: 'hive',
  create: (dtp) => { return new HiveService(dtp); },
};