(function () {
    const ibanEl = document.getElementById('ibanDisplay');
    if (ibanEl) {
        const digits = (ibanEl.textContent || '').replace(/\s+/g, '').replace(/^PL/i, '').replace(/\D/g, '').slice(0, 26);
        if (digits) ibanEl.textContent = 'PL ' + digits.replace(/(.{4})/g, '$1 ').trim();
    }
    const blikEl = document.getElementById('blikDisplay');
    if (blikEl) {
        const d = (blikEl.textContent || '').replace(/\D/g, '').slice(0, 9);
        const parts = [d.slice(0, 3), d.slice(3, 6), d.slice(6, 9)].filter(Boolean).join(' ');
        if (parts) blikEl.textContent = parts;
    }

    document.querySelectorAll('[data-copy-target]').forEach(btn => {
        btn.addEventListener('click', async () => {
            const sel = btn.getAttribute('data-copy-target');
            const el = sel ? document.querySelector(sel) : null;
            if (!el) return;
            const raw = el.textContent.replace(/\u00A0/g, ' ').trim();
            try {
                await navigator.clipboard.writeText(raw);
                const original = btn.textContent;
                btn.textContent = 'Skopiowano!';
                btn.disabled = true;
                setTimeout(() => { btn.textContent = original; btn.disabled = false; }, 1200);
            } catch {
                // fallback
                const r = document.createRange();
                r.selectNodeContents(el);
                const selObj = window.getSelection();
                selObj.removeAllRanges();
                selObj.addRange(r);
                try { document.execCommand('copy'); } catch { }
                selObj.removeAllRanges();
            }
        });
    });
})();