/* global Backbone, Whisper, ConversationController */

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

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

  window.Whisper = window.Whisper || {};
  Whisper.ReadSyncs = new (Backbone.Collection.extend({
    forMessage(message) {
      const receipt = this.findWhere({
        sender: message.get('source'),
        timestamp: message.get('sent_at'),
      });
      if (receipt) {
        window.log.info('Found early read sync for message');
        this.remove(receipt);
        return receipt;
      }

      return null;
    },
    onReceipt(receipt) {
      const messages = new Whisper.MessageCollection();
      return messages
        .fetchSentAt(receipt.get('timestamp'))
        .then(() => {
          const message = messages.find(
            item =>
              item.isIncoming() &&
              item.isUnread() &&
              item.get('source') === receipt.get('sender')
          );
          const notificationForMessage = message
            ? Whisper.Notifications.findWhere({ messageId: message.id })
            : null;
          const removedNotification = Whisper.Notifications.remove(
            notificationForMessage
          );
          const receiptSender = receipt.get('sender');
          const receiptTimestamp = receipt.get('timestamp');
          const wasMessageFound = Boolean(message);
          const wasNotificationFound = Boolean(notificationForMessage);
          const wasNotificationRemoved = Boolean(removedNotification);
          window.log.info('Receive read sync:', {
            receiptSender,
            receiptTimestamp,
            wasMessageFound,
            wasNotificationFound,
            wasNotificationRemoved,
          });
          return message
            ? message.markRead(receipt.get('read_at')).then(() => {
                // This notification may result in messages older than this one being
                //   marked read. We want those messages to have the same expire timer
                //   start time as this one, so we pass the read_at value through.
                this.notifyConversation(message, receipt.get('read_at'));
                this.remove(receipt);
              })
            : Promise.resolve();
        })
        .catch(error => {
          window.log.error(
            'ReadSyncs.onReceipt error:',
            error && error.stack ? error.stack : error
          );
        });
    },
    notifyConversation(message, readAt) {
      const conversation = ConversationController.get({
        id: message.get('conversationId'),
      });

      if (conversation) {
        conversation.onReadMessage(message, readAt);
      }
    },
  }))();
})();