import { exec } from 'child_process';
import * as path from 'path';
import * as fs from 'fs';

/**
 * Script to generate migrations using drizzle-kit
 * 
 * This script:
 * 1. Runs drizzle-kit generate to create migration files
 * 2. Ensures the migrations directory exists
 * 3. Handles errors and provides feedback
 */
const main = async () => {
  console.log('Generating migrations...');

  // Ensure migrations directory exists
  const migrationsDir = path.join(__dirname, 'sql');
  if (!fs.existsSync(migrationsDir)) {
    fs.mkdirSync(migrationsDir, { recursive: true });
  }

  // Run drizzle-kit generate command
  const command = 'npx drizzle-kit generate';

  exec(command, (error, stdout, stderr) => {
    if (error) {
      console.error(`Error generating migrations: ${error.message}`);
      return;
    }

    if (stderr) {
      console.error(`Migration generation stderr: ${stderr}`);
    }

    console.log(stdout);
    console.log('Migrations generated successfully');

    // List generated migration files
    const files = fs.readdirSync(migrationsDir)
      .filter(file => file.endsWith('.sql'));

    if (files.length === 0) {
      console.log('No migration files were generated. Your schema might be up to date.');
    } else {
      console.log('Generated migration files:');
      files.forEach(file => console.log(`- ${file}`));
    }
  });
};

main().catch(err => {
  console.error('Migration generation failed');
  console.error(err);
  process.exit(1);
});