'use strict';

const log = require('npmlog');
const fields = require('../models/fields');
const settings = require('../models/settings');
const {getTrustedUrl, getPublicUrl} = require('./urls');
const { tUI, tMark } = require('./translate');
const contextHelpers = require('./context-helpers');
const {getFieldColumn, toNameTagLangauge} = require('../../shared/lists');
const forms = require('../models/forms');
const messageSender = require('./message-sender');
const tools = require('./tools');

module.exports = {
    sendAlreadySubscribed,
    sendConfirmAddressChange,
    sendConfirmSubscription,
    sendConfirmUnsubscription,
    sendSubscriptionConfirmed,
    sendUnsubscriptionConfirmed
};

async function sendSubscriptionConfirmed(locale, list, email, subscription) {
    const relativeUrls = {
        preferencesUrl: '/subscription/' + list.cid + '/manage/' + subscription.cid,
        unsubscribeUrl: '/subscription/' + list.cid + '/unsubscribe/' + subscription.cid
    };

    await _sendMail(list, email, 'subscription_confirmed', locale, tMark('subscriptionConfirmed'), relativeUrls, subscription);
}

async function sendAlreadySubscribed(locale, list, email, subscription) {
    const relativeUrls = {
        preferencesUrl: '/subscription/' + list.cid + '/manage/' + subscription.cid,
        unsubscribeUrl: '/subscription/' + list.cid + '/unsubscribe/' + subscription.cid
    };
    await _sendMail(list, email, 'already_subscribed', locale, tMark('listEmailAddressAlreadyRegistered'), relativeUrls, subscription);
}

async function sendConfirmAddressChange(locale, list, email, cid, subscription) {
    const relativeUrls = {
        confirmUrl: '/subscription/confirm/change-address/' + cid
    };
    await _sendMail(list, email, 'confirm_address_change', locale, tMark('listPleaseConfirmEmailChangeIn'), relativeUrls, subscription);
}

async function sendConfirmSubscription(locale, list, email, cid, subscription) {
    const relativeUrls = {
        confirmUrl: '/subscription/confirm/subscribe/' + cid
    };
    await _sendMail(list, email, 'confirm_subscription', locale, tMark('pleaseConfirmSubscription'), relativeUrls, subscription);
}

async function sendConfirmUnsubscription(locale, list, email, cid, subscription) {
    const relativeUrls = {
        confirmUrl: '/subscription/confirm/unsubscribe/' + cid
    };
    await _sendMail(list, email, 'confirm_unsubscription', locale, tMark('listPleaseConfirmUnsubscription'), relativeUrls, subscription);
}

async function sendUnsubscriptionConfirmed(locale, list, email, subscription) {
    const relativeUrls = {
        subscribeUrl: '/subscription/' + list.cid + '?cid=' + subscription.cid
    };
    await _sendMail(list, email, 'unsubscription_confirmed', locale, tMark('listUnsubscriptionConfirmed'), relativeUrls, subscription);
}

async function _sendMail(list, email, template, locale, subjectKey, relativeUrls, subscription) {
    subscription = {
        ...subscription,
        email
    };

    const flds = await fields.listGrouped(contextHelpers.getAdminContext(), list.id);

    const encryptionKeys = [];
    for (const fld of flds) {
        if (fld.type === 'gpg' && fld.value) {
            encryptionKeys.push(subscription[getFieldColumn(fld)].value.trim());
        }
    }

    const configItems = await settings.get(contextHelpers.getAdminContext(), ['defaultHomepage', 'adminEmail']);

    const data = {
        title: list.name,
        homepage: configItems.defaultHomepage || getTrustedUrl(),
        contactAddress: list.contact_email || configItems.adminEmail,
    };

    for (let relativeUrlKey in relativeUrls) {
        data[relativeUrlKey] = getPublicUrl(relativeUrls[relativeUrlKey], {locale});
    }

    const fsTemplate = template.replace(/_/g, '-');
    const text = {
        template: 'subscription/mail-' + fsTemplate + '-text.hbs'
    };

    const html = {
        template: 'subscription/mail-' + fsTemplate + '-html.mjml.hbs',
        layout: 'subscription/layout.mjml.hbs',
        type: 'mjml'
    };

    if (list.default_form) {
        const form = await forms.getById(contextHelpers.getAdminContext(), list.default_form, false);

        text.template = form['mail_' + template + '_text'] || text.template;
        html.template = form['mail_' + template + '_html'] || html.template;
        html.layout = form.layout || html.layout;
    }

    try {
        const mergeTags = fields.getMergeTags(flds, subscription);

        if (list.send_configuration) {
            await messageSender.queueSubscriptionMessage(
                list.send_configuration,
                {
                    name: list.to_name === null ? undefined : tools.formatTemplate(list.to_name, toNameTagLangauge, mergeTags, false),
                    address: email
                },
                tUI(subjectKey, locale, { list: list.name }),
                encryptionKeys,
                {
                    html,
                    text,
                    locale,
                    data
                }
            );
        } else {
            log.warn('Subscription', `Not sending email for list id:${list.id} because not send configuration is set.`);
        }
    } catch (err) {
        log.error('Subscription', err);
    }
}