import { storage } from './utils.js';

export default () => new Promise(async (resolve, reject) => {
    const analyticsPreferences = storage('analytics');

    if (analyticsPreferences.get('enabled') !== false) {
        var analyticsData;

        if (!analyticsPreferences.get('savedResponse')) {
            try {
                analyticsData = await (await fetch('/api/analytics/site/' + location.hostname)).json();
                analyticsPreferences.set('savedResponse', analyticsData);
            } catch (e) { analyticsPreferences.set('enabled', false); resolve({}); }
        } else analyticsData = analyticsPreferences.get('savedResponse');

        if (analyticsData.success && analyticsData.data.domain === location.hostname) {
            analyticsPreferences.set('enabled', true);

            const script = document.createElement('script');
            script.src = '/api/analytics/script.js';
            script.setAttribute('data-website-id', analyticsData.data.id);
            script.setAttribute('data-auto-track', 'false');
            script.setAttribute('data-host-url', location.origin + '/api/analytics');
            script.setAttribute('data-cache', 'true');
            document.head.appendChild(script);

            script.onload = () => resolve(window.umami);
        } else {
            analyticsPreferences.set('enabled', false);
            resolve({});
        }
    } else resolve({});
});