/**
 * Update vocabulary context entries
 * This script allows you to modify vocabulary records in Context table
 * You can:
 * - Update specific vocab words
 * - Bulk update by grade
 * - Update fields like title, context, knowledge, desc
 * - Delete vocab entries
 */

const { sequelize } = require('./config/database');
const { Context } = require('./models');

// ============================================
// CONFIGURATION: Customize your updates here
// ============================================

const UPDATE_MODE = 'single'; // Options: 'single', 'bulk_by_grade', 'delete'

// FOR SINGLE WORD UPDATE
const SINGLE_UPDATE = {
  oldTitle: 'dad',           // Current title to search for
  grade: 101,                 // Grade to search in
  updates: {
    title: 'dad',             // New title (if you want to change it)
    context: 'Family member - father',  // Updated context
    knowledge: 'Common family vocabulary for beginners',
    desc: 'Từ chỉ bố/cha trong tiếng Anh'
  }
};

// FOR BULK UPDATE BY GRADE
const BULK_UPDATE = {
  grade: 101,                 // Which grade to update
  updates: {
    context: 'Grade 1 Unit 1 Lesson 1 vocabulary',
    knowledge: 'Basic greeting and family vocabulary'
  }
};

// FOR DELETION
const DELETE_CONFIG = {
  title: 'test_word',        // Word to delete
  grade: 101                  // Grade to delete from
};

// ============================================
// MAIN FUNCTIONS
// ============================================

async function updateSingleVocab() {
  const { oldTitle, grade, updates } = SINGLE_UPDATE;
  
  console.log(`🔍 Looking for vocab: "${oldTitle}" in grade ${grade}...`);
  
  const vocab = await Context.findOne({
    where: {
      title: oldTitle,
      grade: grade,
      type: 'vocabulary'
    }
  });

  if (!vocab) {
    console.log('❌ Vocab not found!');
    return 0;
  }

  console.log(`✅ Found vocab: ${vocab.title}`);
  console.log(`📝 Updating...`);
  
  await vocab.update(updates);
  console.log(`✅ Updated successfully!`);
  console.log(`New data:`, {
    title: vocab.title,
    grade: vocab.grade,
    context: vocab.context,
    knowledge: vocab.knowledge,
    desc: vocab.desc
  });
  
  return 1;
}

async function bulkUpdateByGrade() {
  const { grade, updates } = BULK_UPDATE;
  
  console.log(`🔍 Looking for all vocab in grade ${grade}...`);
  
  const vocabs = await Context.findAll({
    where: {
      grade: grade,
      type: 'vocabulary'
    }
  });

  console.log(`✅ Found ${vocabs.length} vocab words`);
  console.log(`📝 Updating...`);
  
  for (const vocab of vocabs) {
    await vocab.update(updates);
  }
  
  console.log(`✅ Updated ${vocabs.length} vocab words successfully!`);
  return vocabs.length;
}

async function deleteVocab() {
  const { title, grade } = DELETE_CONFIG;
  
  console.log(`🔍 Looking for vocab: "${title}" in grade ${grade}...`);
  
  const result = await Context.destroy({
    where: {
      title: title,
      grade: grade,
      type: 'vocabulary'
    }
  });

  if (result === 0) {
    console.log('❌ Vocab not found or already deleted!');
  } else {
    console.log(`✅ Deleted ${result} vocab entry!`);
  }
  
  return result;
}

async function listVocabByGrade(grade) {
  console.log(`\n📚 Listing all vocab in grade ${grade}...`);
  
  const vocabs = await Context.findAll({
    where: {
      grade: grade,
      type: 'vocabulary'
    },
    order: [['title', 'ASC']]
  });

  console.log(`\n✅ Found ${vocabs.length} vocab words:\n`);
  vocabs.forEach((v, idx) => {
    console.log(`${idx + 1}. ${v.title}`);
    if (v.context) console.log(`   Context: ${v.context}`);
    if (v.knowledge) console.log(`   Knowledge: ${v.knowledge}`);
    if (v.desc) console.log(`   Desc: ${v.desc}`);
    console.log('');
  });
  
  return vocabs.length;
}

// ============================================
// MAIN EXECUTION
// ============================================

async function main() {
  try {
    console.log('🔄 Starting vocab context update...\n');
    
    await sequelize.authenticate();
    console.log('✅ Database connection OK\n');

    let result = 0;

    switch (UPDATE_MODE) {
      case 'single':
        result = await updateSingleVocab();
        break;
      
      case 'bulk_by_grade':
        result = await bulkUpdateByGrade();
        break;
      
      case 'delete':
        result = await deleteVocab();
        break;
      
      case 'list':
        // Change grade here to list different grades
        result = await listVocabByGrade(101);
        break;
      
      default:
        console.log('❌ Invalid UPDATE_MODE');
    }

    console.log('\n✅ Operation complete!');
    console.log(`📊 Records affected: ${result}`);
    
    process.exit(0);
  } catch (error) {
    console.error('❌ Error during update:', error.message);
    console.error(error.stack);
    process.exit(1);
  }
}

// Run the script
main();