#!/usr/bin/env node
/**
 * Fix lodash.template assignWith issue - Manual fix script
 * Run this after npm/yarn install and before build
 * 
 * Usage: node fix-lodash-manual.js
 */
const fs = require('fs');
const path = require('path');

const lodashTemplatePath = path.join(__dirname, 'node_modules', 'lodash.template', 'index.js');

if (!fs.existsSync(lodashTemplatePath)) {
  console.error('❌ lodash.template not found at:', lodashTemplatePath);
  console.error('Please run npm install or yarn install first');
  process.exit(1);
}

let content = fs.readFileSync(lodashTemplatePath, 'utf8');

// Check if already patched
if (content.includes('/* LODASH_TEMPLATE_PATCHED */')) {
  console.log('✓ lodash.template already patched');
  process.exit(0);
}

// Check if assignWith is actually missing
if (content.includes('assignWith')) {
  // Check if it's used but not defined
  const hasFunctionDefinition = /function\s+assignWith|var\s+assignWith\s*=/.test(content);
  if (hasFunctionDefinition) {
    console.log('✓ assignWith is already defined in lodash.template');
    process.exit(0);
  }
}

console.log('🔧 Patching lodash.template...');

// Simple assignWith implementation
const assignWithImpl = `/* LODASH_TEMPLATE_PATCHED */
// assignWith polyfill for lodash.template
function assignWith(object, source, customizer) {
  if (object == null) return object;
  var props = Object.keys(Object(source));
  for (var i = 0; i < props.length; i++) {
    var key = props[i];
    var value = source[key];
    var assignedValue = customizer ? customizer(object[key], value, key, object, source) : value;
    if (assignedValue !== undefined) {
      object[key] = assignedValue;
    }
  }
  return object;
}
`;

// Find first line break after comments
let insertPos = 0;
const lines = content.split('\n');
for (let i = 0; i < lines.length; i++) {
  if (lines[i].trim() === ' */' || lines[i].trim() === '*/') {
    insertPos = content.indexOf('\n', content.indexOf(lines[i])) + 1;
    break;
  }
}

if (insertPos === 0) {
  insertPos = content.indexOf('\n') + 1;
}

const before = content.substring(0, insertPos);
const after = content.substring(insertPos);

content = before + '\n' + assignWithImpl + after;

fs.writeFileSync(lodashTemplatePath, content);
console.log('✅ Successfully patched lodash.template with assignWith function');
console.log('   File:', lodashTemplatePath);