/* Slim Uiltjies — Share helpers
   Uses the Web Share API where available, falls back to download or WhatsApp deep-link.
*/
(function () {
  'use strict';

  function canShareFiles() {
    return !!(navigator.canShare && navigator.canShare({ files: [new File([new Blob()], 'x.txt', { type: 'text/plain' })] }));
  }

  function isMobile() {
    return /Android|iPhone|iPad|iPod/i.test(navigator.userAgent);
  }

  async function shareFile(file, { title = 'Invoice', text = '' } = {}) {
    if (navigator.canShare && navigator.canShare({ files: [file] })) {
      try {
        await navigator.share({ files: [file], title, text });
        return { ok: true, method: 'native' };
      } catch (e) {
        if (e && e.name === 'AbortError') return { ok: false, cancelled: true };
        // fall through
      }
    }
    // Fallback: download the file
    downloadBlob(file);
    return { ok: true, method: 'download' };
  }

  async function shareText({ title = '', text = '', url = '' } = {}) {
    if (navigator.share) {
      try {
        await navigator.share({ title, text, url });
        return { ok: true };
      } catch (e) {
        if (e && e.name === 'AbortError') return { ok: false, cancelled: true };
      }
    }
    // WhatsApp deep link fallback
    if (isMobile()) {
      const msg = [text, url].filter(Boolean).join('\n');
      window.open(`https://wa.me/?text=${encodeURIComponent(msg)}`, '_blank');
      return { ok: true, method: 'whatsapp' };
    }
    // Copy to clipboard fallback
    try {
      await navigator.clipboard.writeText([title, text, url].filter(Boolean).join('\n'));
      return { ok: true, method: 'clipboard' };
    } catch {
      return { ok: false };
    }
  }

  function downloadBlob(blob, filename) {
    const a = document.createElement('a');
    const url = URL.createObjectURL(blob);
    a.href = url;
    a.download = filename || blob.name || 'download';
    document.body.appendChild(a);
    a.click();
    setTimeout(() => {
      document.body.removeChild(a);
      URL.revokeObjectURL(url);
    }, 100);
  }

  function openPrintDialog() {
    setTimeout(() => window.print(), 200);
  }

  function whatsappUrl(phone, message) {
    const num = (phone || '').replace(/[^0-9+]/g, '');
    return `https://wa.me/${num}?text=${encodeURIComponent(message || '')}`;
  }

  window.SUShare = {
    canShareFiles,
    isMobile,
    shareFile,
    shareText,
    downloadBlob,
    openPrintDialog,
    whatsappUrl,
  };
})();