/* eslint-disable no-console */

// newsletter scheduling with MailChimp

import moment from 'moment';
import { getSetting } from 'meteor/vulcan:core';
import Newsletters from '../../modules/collection.js';
import MailChimpNPM from 'mailchimp';

const { apiKey, listId, fromName, fromEmail } = getSetting('mailchimp');

const mailChimpAPI = new MailChimpNPM.MailChimpAPI(apiKey, { version : '2.0' });

const callSyncAPI = function ( section, method, options, callback ) {
  if ( callback && typeof callback === 'function' ) {
    // If anyone still wants to use old-fashioned callback method
    mailChimpAPI.call( section, method, options, callback );
  } else {
    try {
      var wrapped = Meteor.wrapAsync( mailChimpAPI.call, mailChimpAPI );
      return wrapped( section, method, options );
    } catch ( error ) {
      // A workaround for:
      // https://github.com/meteor/meteor/issues/2774
      console.log('// MailChimp API error')
      console.log(error)
      // if ( !error.error ) {
      //   throw new Error( error.code, error.message );
      // } else {
      //   throw new Error( error );
      // }
    }
  }
};

Newsletters.mailchimp = {

  // add a user to a MailChimp list.
  // called when a new user is created, or when an existing user fills in their email
  subscribe(email, confirm = false) {
    try {
      const subscribeOptions = {
        id: listId,
        email: {email: email},
        double_optin: confirm
      };
      // subscribe user
      const subscribe = callSyncAPI('lists', 'subscribe', subscribeOptions);
      return {result: 'subscribed', ...subscribe};
    } catch (error) {
      // if the email is already in the Mailchimp list, no need to throw an error
      if (error.message === "214") {
        return {result: 'already-subscribed'};
      }
      throw new Error("subscription-failed", error.message);
    }
  },

  // remove a user to a MailChimp list.
  // called from the user's account
  unsubscribe(email) {
    try {
      const subscribeOptions = {
        id: listId,
        email: {email: email},
        delete_member: true // delete the member from the list to make it possible for him to *resubscribe* via API (mailchimp's spam prevention policy)
      };
      // unsubscribe user
      const subscribe = callSyncAPI('lists', 'unsubscribe', subscribeOptions);
      return {result: 'unsubscribed', ...subscribe};
    } catch (error) {
      throw new Error("unsubscribe-failed", error.message);
    }
  },

  send({ title, subject, text, html, isTest = false }) {

    try {

      var campaignOptions = {
        type: 'regular',
        options: {
          list_id: listId,
          subject: subject,
          from_email: fromEmail,
          from_name: fromName
        },
        content: {
          html: html,
          text: text
        }
      };

      // create campaign
      const mailchimpNewsletter = callSyncAPI('campaigns', 'create', campaignOptions);

      console.log('// Newsletter created');
      // console.log(campaign)

      const scheduledMoment = moment().utcOffset(0).add(1, 'hours');
      const scheduledTime = scheduledMoment.format("YYYY-MM-DD HH:mm:ss");

      const scheduleOptions = {
        cid: mailchimpNewsletter.id,
        schedule_time: scheduledTime
      };

      // schedule campaign
      const schedule = callSyncAPI('campaigns', 'schedule', scheduleOptions); // eslint-disable-line

      console.log('// Newsletter scheduled for '+scheduledTime);

      return mailchimpNewsletter;

    } catch (error) {
      console.log(error);
      return false;
    }
  }

}