(function () {
    // Licznik znaków opisu
    const opis = document.getElementById('opis');
    const opisCount = document.getElementById('opisCount');
    if (opis && opisCount) {
        const updateCount = () => (opisCount.textContent = String(opis.value.length));
        opis.addEventListener('input', updateCount);
        updateCount();
    }

    // IBAN: tylko cyfry, auto-grupowanie co 4
    const iban = document.getElementById('numer_konta');
    if (iban) {
        iban.addEventListener('input', () => {
            const digits = iban.value.replace(/\D/g, '').slice(0, 26); // 26 cyfr po PL
            const chunked = digits.replace(/(.{4})/g, '$1 ').trim();
            iban.value = chunked;
        });
    }

    // BLIK telefon: tylko cyfry, format 3-3-3
    const tel = document.getElementById('numer_telefonu_blik');
    if (tel) {
        tel.addEventListener('input', () => {
            const digits = tel.value.replace(/\D/g, '').slice(0, 9);
            const parts = [];
            if (digits.length > 0) parts.push(digits.substring(0, 3));
            if (digits.length > 3) parts.push(digits.substring(3, 6));
            if (digits.length > 6) parts.push(digits.substring(6, 9));
            tel.value = parts.join(' ');
        });
    }

    // „Ustaw globalne” – jest tylko w trybie edycji; odpalamy warunkowo
    const setGlobalBtn = document.getElementById('ustaw-globalne');
    if (setGlobalBtn && iban && tel) {
        setGlobalBtn.addEventListener('click', () => {
            const gIban = setGlobalBtn.dataset.iban || '';
            const gBlik = setGlobalBtn.dataset.blik || '';

            if (gIban) {
                iban.value = gIban.replace(/\D/g, '').replace(/(.{4})/g, '$1 ').trim();
                iban.dispatchEvent(new Event('input'));
            }
            if (gBlik) {
                const d = gBlik.replace(/\D/g, '').slice(0, 9);
                const p = [d.slice(0, 3), d.slice(3, 6), d.slice(6, 9)]
                    .filter(Boolean)
                    .join(' ');
                tel.value = p;
                tel.dispatchEvent(new Event('input'));
            }
        });
    }

    // Cel: minimalna wartość
    const cel = document.getElementById('cel');
    if (cel) {
        cel.addEventListener('change', () => {
            if (cel.value && Number(cel.value) < 0.01) cel.value = '0.01';
        });
    }
})();