/* global
  Backbone,
  Whisper,
  MessageController,
  ConversationController
*/

/* eslint-disable more/no-then */

// eslint-disable-next-line func-names
(function() {
  'use strict';

  const ONE_DAY = 24 * 60 * 60 * 1000;

  window.Whisper = window.Whisper || {};
  Whisper.Deletes = new (Backbone.Collection.extend({
    forMessage(message) {
      const matchingDeletes = this.filter({
        targetSentTimestamp: message.get('sent_at'),
        fromId: message.getContact().get('id'),
      });

      if (matchingDeletes.length > 0) {
        window.log.info('Found early DOE for message');
        this.remove(matchingDeletes);
        return matchingDeletes;
      }

      return [];
    },
    async onDelete(del) {
      try {
        const messages = await window.Signal.Data.getMessagesBySentAt(
          del.get('targetSentTimestamp'),
          {
            MessageCollection: Whisper.MessageCollection,
          }
        );

        // The contact the delete message came from
        const fromContact = ConversationController.get(del.get('fromId'));

        if (!fromContact) {
          window.log.info(
            'No contact for DOE',
            del.get('fromId'),
            del.get('targetSentTimestamp')
          );

          return;
        }

        const targetMessage = messages.find(m => {
          const messageContact = m.getContact();

          if (!messageContact) {
            return false;
          }

          // Find messages which are from the same contact who sent the DOE
          return messageContact.get('id') === fromContact.get('id');
        });

        if (!targetMessage) {
          window.log.info(
            'No message for DOE',
            del.get('fromId'),
            del.get('targetSentTimestamp')
          );

          return;
        }

        // Make sure the server timestamps for the DOE and the matching message
        // are less than one day apart
        const delta = Math.abs(
          del.get('serverTimestamp') - targetMessage.get('serverTimestamp')
        );
        if (delta > ONE_DAY) {
          window.log.info('Received late DOE. Dropping.', {
            fromId: del.get('fromId'),
            targetSentTimestamp: del.get('targetSentTimestamp'),
            messageServerTimestamp: message.get('serverTimestamp'),
            deleteServerTimestamp: del.get('serverTimestamp'),
          });
          this.remove(del);

          return;
        }

        const message = MessageController.register(
          targetMessage.id,
          targetMessage
        );

        await message.handleDeleteForEveryone(del);

        this.remove(del);
      } catch (error) {
        window.log.error(
          'Deletes.onDelete error:',
          error && error.stack ? error.stack : error
        );
      }
    },
  }))();
})();