require('dotenv').config();
const fs = require('fs').promises;
const path = require('path');
const connectDB = require('../config/database');
const Insurance = require('../models/insurance');
const mongoose = require('mongoose');

/**
 * Migration: insurance
 * Created: 11:13:38 10/12/2025
 * Updated: 14/12/2025 - Simplified for new structure only
 */
async function migrate() {
  try {
    console.log('Starting migration: insurance...');
    await connectDB();
    
    // Đọc file insurance.json
    const insuranceJsonPath = path.join(__dirname, '../data/insurance.json');
    console.log('Reading JSON file from:', insuranceJsonPath);
    
    const insuranceData = JSON.parse(await fs.readFile(insuranceJsonPath, 'utf8'));
    console.log('Insurance data loaded successfully');
    
    // Sử dụng phương thức migrateFromJson của model
    await Insurance.migrateFromJson(insuranceData);
    
    console.log('Insurance migration completed successfully!');
    
    await mongoose.disconnect();
    process.exit(0);
  } catch (error) {
    console.error('Migration error:', error);
    process.exit(1);
  }
}

/**
 * Custom migration logic cho insurance data
 */
async function migrateInsuranceData(insuranceData) {
  try {
    console.log('Starting custom migration logic...');
    
    // Xóa dữ liệu cũ nếu có
    const existingInsurance = await Insurance.find({});
    if (existingInsurance.length > 0) {
      console.log(`Found ${existingInsurance.length} existing insurance documents`);
      await Insurance.deleteMany({});
      console.log('Cleared existing insurance data');
    }
    
    // Tạo document mới
    const insuranceDocument = new Insurance({
      name: 'default',
      version: '2.0.0',
      language: 'en',
      hero: insuranceData.hero,
      page: insuranceData.page,
      content: insuranceData.content,
      createdAt: new Date(),
      updatedAt: new Date(),
      isActive: true
    });
    
    // Lưu vào database
    await insuranceDocument.save();
    console.log('Insurance document saved successfully');
  
  } catch (error) {
    console.error('Error in migrateInsuranceData:', error);
    throw error;
  }
}

// Chạy migration nếu được gọi trực tiếp
if (require.main === module) {
  migrate();
}

module.exports = { migrate, migrateInsuranceData };