#!/usr/bin/env node
/* Restaura funciones borradas de inventory.js desde git HEAD. */
const fs = require('fs');
const { execSync } = require('child_process');

const old = execSync('git show HEAD:pos/static/js/inventory.js', { maxBuffer: 20 * 1024 * 1024 }).toString();
let cur = fs.readFileSync('pos/static/js/inventory.js', 'utf8');

const MISSING = ['viewHistory', 'closeHistoryModal', 'recordTransfer', 'approvePhysicalCount',
  'cancelDraft', 'loadAlerts', 'printBarcode', 'deleteItem', 'publishToMeli'];

// extraer bloque de función con llaves balanceadas (indent 4 espacios)
function extractFn(name) {
  const marker = '\n    function ' + name + '(';
  const i = old.indexOf(marker);
  if (i === -1) return null;
  let depth = 0, j = i + 1, started = false;
  for (; j < old.length; j++) {
    const ch = old[j];
    if (ch === '{') { depth++; started = true; }
    else if (ch === '}') { depth--; if (started && depth === 0) { j++; break; } }
  }
  // incluir hasta el final de línea
  while (old[j] === '\n') j++;
  return old.slice(i + 1, j);
}

const blocks = [];
for (const name of MISSING) {
  const b = extractFn(name);
  if (b) blocks.push(b.trimEnd());
  else console.log('⚠ no encontrado en HEAD:', name);
}

const anchor = '\n    // =====================================================================\n    //  EXPOSE GLOBALS (for onclick handlers in HTML)';
if (!cur.includes(anchor)) { console.log('anchor EXPOSE no encontrado'); process.exit(1); }
const restore = '\n    // =====================================================================\n' +
  '    //  RESTAURADAS (borradas por error en el patch de transferencias)\n' +
  '    // =====================================================================\n\n' +
  blocks.join('\n\n') + '\n' + anchor;
cur = cur.replace(anchor, restore);

// printBarcode: reemplazar por la versión Code128 (la de HEAD imprime texto plano)
if (blocks.some(b => b.includes('function printBarcode'))) {
  const iStart = cur.indexOf('    function printBarcode(');
  if (iStart !== -1) {
    let depth = 0, j = iStart, started = false;
    for (; j < cur.length; j++) {
      const ch = cur[j];
      if (ch === '{') { depth++; started = true; }
      else if (ch === '}') { depth--; if (started && depth === 0) { j++; break; } }
    }
    while (cur[j] === '\n') j++;
    const code128 = `    // ── Code128B encoder → SVG (escaneable en lector estándar) ──
    var CODE128_BARS = [
        '212222','222122','222221','121223','121322','131222','122213','122312','132212','221213',
        '221312','231212','112232','122132','122231','113222','123122','123221','223211','221132',
        '221231','213212','223112','312131','311222','321122','321221','312212','322112','322211',
        '212123','212321','232121','111323','131123','131321','112313','132113','132311','211313',
        '231113','231311','112133','112331','132131','113123','113321','133121','313121','211331',
        '231131','213113','213311','213131','311123','311321','331121','312113','312311','332111',
        '314111','221411','431111','111224','111422','121124','121421','141122','141221','112214',
        '112412','122114','122411','142112','142211','241211','221114','413111','241112','134111',
        '111242','121142','121241','114212','124112','124211','411212','421112','421211','212141',
        '214121','412121','111143','111341','131141','114113','114311','411113','411311','113141',
        '114131','311141','411131','211412','211214','211232','2331112'
    ];

    function code128Svg(data, width, height) {
        data = String(data || '');
        if (!data.length) return '';
        var codes = [104];
        var sum = 104;
        for (var i = 0; i < data.length; i++) {
            var c = data.charCodeAt(i);
            if (c < 32 || c > 126) c = 32;
            var v = c - 32;
            codes.push(v);
            sum += v * (i + 1);
        }
        codes.push(sum % 103);
        codes.push(106);
        var quiet = 10;
        var modules = quiet * 2;
        codes.forEach(function (cd) {
            CODE128_BARS[cd].split('').forEach(function (w) { modules += parseInt(w, 10); });
        });
        var mw = width / modules;
        var bars = '';
        var x = quiet * mw;
        codes.forEach(function (cd) {
            var pat = CODE128_BARS[cd];
            for (var k = 0; k < pat.length; k++) {
                var w = parseInt(pat[k], 10) * mw;
                if (k % 2 === 0) bars += '<rect x="' + x.toFixed(2) + '" y="0" width="' + w.toFixed(2) + '" height="' + height + '"/>';
                x += w;
            }
        });
        return '<svg xmlns="http://www.w3.org/2000/svg" width="' + width + '" height="' + height + '" viewBox="0 0 ' + width + ' ' + height + '" fill="#000">' + bars + '</svg>';
    }

    function printBarcode(barcode, partNumber, name) {
        var w = window.open('', '_blank', 'width=420,height=300');
        w.document.write('<html><head><title>Etiqueta</title><style>body{font-family:system-ui,sans-serif;text-align:center;padding:16px;margin:0;}h1{font-size:1rem;margin:4px 0;}p{margin:2px 0;font-size:0.85rem;}</style></head><body>');
        w.document.write(code128Svg(barcode || partNumber, 320, 70));
        w.document.write('<h1>' + (barcode || partNumber) + '</h1>');
        w.document.write('<p style="font-weight:600;">' + partNumber + '</p>');
        w.document.write('<p style="font-size:0.85rem;">' + name + '</p>');
        w.document.write('</body></html>');
        w.document.close();
        w.print();
    }
`;
      cur = cur.slice(0, iStart) + code128 + cur.slice(j);
      console.log('printBarcode reemplazado por versión Code128');
    }
}

fs.writeFileSync('pos/static/js/inventory.js', cur);
console.log('restauración completa');