const fs = require('fs');
const path = require('path');

const oils = require('../data/taxonomy/oils.json');
const concerns = require('../data/taxonomy/concerns.json');

const LOCALES = ['sr', 'en', 'de', 'fr'];

const legacyFiles = [
  { file: 'najbolje-arganovo-ulje-za-bore.json', oil: 'argan-oil', concern: 'wrinkles' },
  { file: 'najbolje-arganovo-ulje-za-suvu-kozu.json', oil: 'argan-oil', concern: 'dry-skin' },
  { file: 'najbolje-arganovo-ulje-za-podocnjake.json', oil: 'argan-oil', concern: 'under-eye-bags' },
  { file: 'najbolje-ulje-divlje-ruze-za-bore.json', oil: 'rosehip-oil', concern: 'wrinkles' },
  { file: 'najbolje-ulje-divlje-ruze-za-tamne-pjege.json', oil: 'rosehip-oil', concern: 'dark-spots' },
  { file: 'najbolje-ulje-divlje-ruze-za-oziljke-od-akni.json', oil: 'rosehip-oil', concern: 'acne-scars' },
  { file: 'najbolje-jojoba-ulje-za-akne.json', oil: 'jojoba-oil', concern: 'acne' },
  { file: 'najbolje-jojoba-ulje-za-masnu-kozu.json', oil: 'jojoba-oil', concern: 'oily-skin' },
  { file: 'najbolje-ulje-pasjeg-trna-za-hiperpigmentaciju.json', oil: 'sea-buckthorn-oil', concern: 'hyperpigmentation' },
  { file: 'najbolje-ulje-slatkog-badema-za-osetljivu-kozu.json', oil: 'sweet-almond-oil', concern: 'sensitive-skin' }
];

function extractContent(oldData) {
  return {
    schema: {
      version: "1.0.0",
      type: "oil-for-concern",
      oilId: oldData.oilSlug,
      concernId: oldData.concernSlug
    },
    content: {
      whyThisWorks: oldData.whyThisWorks,
      keyBenefits: oldData.keyBenefits,
      howToApply: oldData.howToApply,
      expectedResults: oldData.expectedResults,
      timeframe: oldData.timeframe
    },
    metadata: {
      productsToShow: oldData.productsToShow || [],
      complementaryIngredients: oldData.complementaryIngredients || [],
      customerResults: (oldData.customerResults || []).map(r => ({
        quote: r.quote,
        name: r.name,
        age: r.age,
        skinType: r.skinType,
        timeframe: r.timeframe
      })),
      faqs: (oldData.faqs || []).map(f => ({
        question: f.question,
        answer: f.answer
      })),
      seoKeywords: oldData.seoKeywords || {},
      relatedPages: oldData.relatedPages || {
        otherOilsForSameConcern: [],
        sameOilForOtherConcerns: []
      }
    }
  };
}

function migrateFiles() {
  const sourceDir = path.join(__dirname, '../data/oil-for-concern');
  const targetDir = path.join(__dirname, '../data/content/oil-for-concern');
  
  if (!fs.existsSync(targetDir)) {
    fs.mkdirSync(targetDir, { recursive: true });
  }
  
  let migrated = 0;
  let errors = [];
  
  for (const mapping of legacyFiles) {
    const sourcePath = path.join(sourceDir, mapping.file);
    const targetFilename = `${mapping.oil}-${mapping.concern}.json`;
    const targetPath = path.join(targetDir, targetFilename);
    
    if (!fs.existsSync(sourcePath)) {
      errors.push(`Source file not found: ${mapping.file}`);
      continue;
    }
    
    try {
      const oldData = JSON.parse(fs.readFileSync(sourcePath, 'utf8'));
      const newData = extractContent(oldData);
      
      fs.writeFileSync(targetPath, JSON.stringify(newData, null, 2));
      console.log(`✓ Migrated: ${mapping.file} → ${targetFilename}`);
      migrated++;
    } catch (err) {
      errors.push(`Error migrating ${mapping.file}: ${err.message}`);
    }
  }
  
  console.log(`\n=== MIGRATION COMPLETE ===`);
  console.log(`Migrated: ${migrated}/${legacyFiles.length} files`);
  
  if (errors.length > 0) {
    console.log(`\nErrors (${errors.length}):`);
    errors.forEach(e => console.log(`  - ${e}`));
  }
}

if (require.main === module) {
  migrateFiles();
}

module.exports = { extractContent, migrateFiles };