function setCookie(name, value, days = 365) {
    const d = new Date();
    d.setTime(d.getTime() + days * 86400000);
    document.cookie = `${name}=${encodeURIComponent(value)};expires=${d.toUTCString()};path=/`;
}

function getCookie(name) {
    return document.cookie
        .split('; ')
        .find(row => row.startsWith(name + '='))
        ?.split('=')[1];
}

function getConsent() {
    try {
        return JSON.parse(decodeURIComponent(getCookie('cookie_consent')));
    } catch {
        return null;
    }
}

function syncConsentToUI() {
    const consent = getConsent();
    if (!consent) return;

    const statistics = document.getElementById('consent-statistics');
    const marketing  = document.getElementById('consent-marketing');

    if (statistics) statistics.checked = !!consent.statistics;
    if (marketing)  marketing.checked  = !!consent.marketing;
}

/* ---------- Banner / Modal ---------- */

function openCookieModal() {
    syncConsentToUI(); // 🔥 Entscheidung laden
    document.getElementById('cookie-modal').classList.remove('hidden');
}

function closeCookieModal() {
    document.getElementById('cookie-modal').classList.add('hidden');
}

function hideBanner() {
    document.getElementById('cookie-banner').classList.add('hidden');
}

/* ---------- Entscheidungen ---------- */

function acceptAllCookies() {
    saveConsent({ functional: true, statistics: true, marketing: true });
}

function acceptNecessaryCookies() {
    saveConsent({ functional: true, statistics: false, marketing: false });
}

function saveCookieSettings() {
    saveConsent({
        functional: true,
        statistics: document.getElementById('consent-statistics').checked,
        marketing: document.getElementById('consent-marketing').checked,
    });
}

function saveConsent(consent) {
    setCookie('cookie_consent', JSON.stringify(consent));
    hideBanner();
    closeCookieModal();

    renderExternalEmbeds();

    if (consent.statistics) {
        activateScripts('statistics');
    }
}

function activateScripts(category) {
    document
        .querySelectorAll(`script[type="text/plain"][data-cookie-category="${category}"]`)
        .forEach(oldScript => {

            const script = document.createElement('script');

            if (oldScript.src) {
                // Externe Scripts
                script.src = oldScript.src;
                script.async = true;
            } else {
                // 🔥 INLINE-SCRIPTS korrekt ausführen
                script.textContent = oldScript.textContent;
            }

            // Attribute übernehmen
            for (const attr of oldScript.attributes) {
                if (!['type', 'data-cookie-category', 'src'].includes(attr.name)) {
                    script.setAttribute(attr.name, attr.value);
                }
            }

            oldScript.parentNode.replaceChild(script, oldScript);
        });
}

/* ---------- Analytics ---------- */

function loadAnalytics() {
    if (window.__GA_CODE__ && !window.__GA_LOADED__) {
        window.__GA_LOADED__ = true;
        const div = document.createElement('div');
        div.innerHTML = window.__GA_CODE__;
        document.head.appendChild(div);
    }
}

/* ---------- Init ---------- */

document.addEventListener('DOMContentLoaded', () => {
    const consent = getConsent();

    if (!consent) {
        document.getElementById('cookie-banner').classList.remove('hidden');
        return;
    }

    if (consent.statistics) {
        activateScripts('statistics');
    }
});