#!/usr/bin/env node
/* Reintento: extracción por marcador de siguiente función (no por llaves). */
const fs = require('fs');
const { execSync } = require('child_process');

let cur = fs.readFileSync('pos/static/js/inventory.js', 'utf8');

// 1. Quitar el bloque restaurado mal insertado
const startMark = '\n    // =====================================================================\n    //  RESTAURADAS (borradas por error en el patch de transferencias)';
const endMark = '\n    // =====================================================================\n    //  EXPOSE GLOBALS (for onclick handlers in HTML)';
const i1 = cur.indexOf(startMark);
const i2 = cur.indexOf(endMark);
if (i1 !== -1 && i2 !== -1 && i2 > i1) {
  cur = cur.slice(0, i1) + cur.slice(i2);
  console.log('bloque malo removido');
} else {
  console.log('bloque restaurado no encontrado (¿ya limpio?)', i1, i2);
}

// 2. Extraer funciones de HEAD por marcadores
const old = execSync('git show HEAD:pos/static/js/inventory.js', { maxBuffer: 20 * 1024 * 1024 }).toString();
const MISSING = ['viewHistory', 'closeHistoryModal', 'recordTransfer', 'approvePhysicalCount',
  'cancelDraft', 'loadAlerts', 'printBarcode', 'deleteItem', 'publishToMeli'];

function extractFn(name) {
  const start = '\n    function ' + name + '(';
  const i = old.indexOf(start);
  if (i === -1) return null;
  // fin: el próximo "    function " o "    // ====" a nivel 4 después del inicio
  let end = old.length;
  const nextFn = old.indexOf('\n    function ', i + start.length);
  const nextMark = old.indexOf('\n    // =====================================================================', i + start.length);
  if (nextFn !== -1) end = Math.min(end, nextFn);
  if (nextMark !== -1) end = Math.min(end, nextMark);
  return old.slice(i + 1, end);
}

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 = endMark;
const restore = '\n    // =====================================================================\n' +
  '    //  RESTAURADAS (recuperadas de git HEAD)\n' +
  '    // =====================================================================\n\n' +
  blocks.join('\n\n') + '\n' + anchor;
cur = cur.replace(anchor, restore);

// printBarcode versión Code128
const iStart = cur.indexOf('    function printBarcode(');
if (iStart !== -1) {
  let end = cur.length;
  const nextFn = cur.indexOf('\n    function ', iStart + 30);
  const nextMark = cur.indexOf('\n    // =====================================================================', iStart + 30);
  if (nextFn !== -1) end = Math.min(end, nextFn);
  if (nextMark !== -1) end = Math.min(end, nextMark);
  const code128 = `    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(end);
  console.log('printBarcode Code128 OK');
}

fs.writeFileSync('pos/static/js/inventory.js', cur);
console.log('restauración v2 completa');