'use strict';

const passport = require('../lib/passport');
const shares = require('../models/shares');
const contextHelpers = require('../lib/context-helpers');
const {renderCsvFromStream} = require('../lib/report-helpers');
const reports = require('../models/reports');
const campaigns = require('../models/campaigns');
const {castToInteger} = require('../lib/helpers');
const {SubscriptionStatus} = require('../../shared/lists');
const knex = require('../lib/knex');
const {LinkId} = require('../models/links');
const moment = require('moment');

const router = require('../lib/router-async').create();

router.getAsync('/open-and-click-counts/:campaignId', passport.loggedIn, async (req, res) => {
    const campaignId = castToInteger(req.params.campaignId);

    await shares.enforceEntityPermission(req.context, 'campaign', campaignId, 'viewStats');
    const campaign = await campaigns.getById(req.context, campaignId, false);

    const listFields = await reports.getCampaignCommonListFields(campaign);

    const results = await reports.getCampaignStatisticsStream(
        campaign,
        ['subscription:email', 'open_tracker:count', 'click_tracker:count', 'open_tracker:country', 'open_tracker:created', 'open_tracker:deviceType', ...Object.keys(listFields)],
        [
            {type: 'links', prefix: 'open_tracker', onConditions: {link: knex.raw('?', [LinkId.OPEN])} },
            {type: 'links', prefix: 'click_tracker', onConditions: {link: knex.raw('?', [LinkId.GENERAL_CLICK])} }
        ],
        null,
        (qry, col) => qry
            .where(col('subscription:status'), SubscriptionStatus.SUBSCRIBED)
    );

    res.set({
        'Content-Disposition': `attachment;filename=campaign-open-and-click-counts-${campaign.cid}.csv`,
        'Content-Type': 'text/csv'
    });

    await renderCsvFromStream(
        results,
        res,
        {
            header: true,
            columns: [
                { key: 'subscription:email', header: 'Email' },
                { key: 'open_tracker:count', header: 'Open count' },
                { key: 'click_tracker:count', header: 'Click count' },
                { key: 'open_tracker:country', header: 'Country (first open)' },
                { key: 'open_tracker:created', header: 'Date/time (first open)' },
                { key: 'open_tracker:deviceType', header: 'Device type (first open)' },
                ...Object.keys(listFields).map(key => ({key, header: listFields[key].key}))
            ],
            delimiter: ','
        },
        async (row, encoding) => ({
                ...row,
                'open_tracker:created': moment(row['open_tracker:created']).toISOString()
            })
    );
});

module.exports = router;