// sleeptimer.js - Verwaltet die automatische Abschaltung und Restzeitanzeige
window.SleepTimer = {
    timeoutId: null,
    endTime: null,
    onExpiry: null,

    init(onExpiryCallback) {
        this.onExpiry = onExpiryCallback;
    },

    setTimer(minutes) {
        this.clear();
        const durationMs = minutes * 60000;
        this.endTime = Date.now() + durationMs;

        this.timeoutId = setTimeout(() => {
            if (this.onExpiry) this.onExpiry();
            this.clear();
        }, durationMs);

        this.updateButtonUI();
    },

    clear() {
        if (this.timeoutId) {
            clearTimeout(this.timeoutId);
            this.timeoutId = null;
        }
        this.endTime = null;
        this.updateButtonUI();
    },

    updateButtonUI() {
        const btn = document.getElementById('open-sleep-timer-modal');
        if (!btn) return;

        if (this.endTime) {
            const remaining = Math.max(0, Math.ceil((this.endTime - Date.now()) / 60000));
            // Anzeige mit Icon und Restzeit
            btn.innerHTML = `<i class="fas fa-hourglass-half"></i> ${remaining} Min`;
            
            // Selbst-Aktualisierung alle 10 Sekunden (nur wenn Timer aktiv)
            if (this.timeoutId) {
                setTimeout(() => this.updateButtonUI(), 10000);
            }
        } else {
            // Standard-Text wenn kein Timer läuft
            btn.textContent = 'Sleeptimer';
        }
        
        // Den "Timer aus"-Button im Modal zeigen/verstecken
        const offBtn = document.getElementById('off-sleep-timer-modal');
        if (offBtn) {
            offBtn.style.display = this.timeoutId ? 'inline-block' : 'none';
        }
    }
};