state.js

// State and defaults
window.Pro = {
  components: [],
  selected: null,
  draggedType: null,
  idCounter: 0,
  items: [],
  data: {
    store: {name: 'ร้านของฉัน', branch: '', address: '', phone: '', taxId: '', logoUrl: '', promptpayId: ''},
    receipt: {id: 'INV-' + new Date().getTime(), date: '', time: '', table: '', staff: ''},
    vatRate: 7
  }
};

Pro.now = function() {
  const d = new Date();
  return {
    date: d.toLocaleDateString('th-TH'),
    time: d.toLocaleTimeString('th-TH', {hour: '2-digit', minute: '2-digit'})
  };
};

Pro.defaults = function(type) {
  const g = Pro.data;
  return {
    heading: {text: 'หัวข้อ', align: 'center', size: '20px', bold: true, inline: true},
    text: {text: 'ข้อความ', align: 'left', size: '14px', inline: true},
    logo: {url: '', width: '120px', align: 'center'},
    image: {url: '', width: '120px', align: 'center'},
    divider: {style: 'solid', color: '#ddd', thickness: '1px'},
    spacer: {height: '20px'},
    'store-info': {inline: true},
    'receipt-info': {inline: true},
    'items-table': {},
    summary: {},
    'payment-info': {method: 'เงินสด', cashReceived: ''},
    barcode: {value: g.receipt.id, height: '50', width: '1'},

    promptpay: {useTotal: true, amount: ''},
    footer: {text: 'ขอบคุณที่ใช้บริการ', align: 'center', size: '14px', inline: true},
    box: {
      padding: 10,
      margin: 5,
      borderWidth: 1,
      borderStyle: 'solid',
      borderColor: '#ddd',
      borderRadius: 4,
      backgroundColor: 'transparent',
      width: '',
      height: '',
      layout: 'block',
      flexDirection: 'row',
      justifyContent: 'flex-start',
      alignItems: 'stretch',
      gap: 10,
      gridColumns: 'repeat(2, 1fr)'
    }
  }[type] || {};
};

Pro.calcSummary = function() {
  const subtotal = Pro.items.reduce((s, it) => s + (Number(it.qty) || 0) * (Number(it.price) || 0), 0);
  const vat = subtotal * ((Number(Pro.data.vatRate) || 0) / 100);
  const total = subtotal + vat;
  return {subtotal, vat, total, items: Pro.items.length};
};