import fs from 'fs';
import path from 'path';
import { execSync } from 'child_process';

const nodeModulesPath = './node_modules';
const packageJsonPath = './package.json';

try {
  if (!fs.existsSync(packageJsonPath)) {
    console.error('package.json not found. Please make sure you are in a valid Node.js project.');
    process.exit(1);
  }

  if (!fs.existsSync(nodeModulesPath)) {
    console.log('node_modules not found. Please run "npm install" to install dependencies.');

    execSync('npm install', { stdio: 'inherit' });

    console.log('Dependencies installed successfully. You can now run "npm run dev".');
    process.exit(0);
  } else {
    console.log('node_modules found. Checking if dependencies are installed...');

    const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
    const dependencies = { ...packageJson.dependencies, ...packageJson.devDependencies };

    const missingDependencies = [];

    for (const depName of Object.keys(dependencies)) {
      const depPath = path.join(nodeModulesPath, depName);

      if (!fs.existsSync(depPath)) {
        missingDependencies.push(depName);
      }
    }

    if (missingDependencies.length === 0) {
      console.log('All dependencies are installed.');
    } else {
      console.log('Missing one or more dependencies:');
      missingDependencies.forEach((dep) => {
        console.log(`  - ${dep}`);
      });
      console.log('Manually run "npm install" to install the missing dependencies.');
      process.exit(1);
    }
  }
} catch (error) {
  console.error('Error checking dependencies:', error.message || error);
  process.exit(1);
}