// =============================================================================
// DEV SCRIPT
// =============================================================================
// Watches TypeScript files and on each change:
// 1. Recompiles with esbuild
// 2. Copies the output to all required locations
//
// Usage: npm run watch

const { spawn, execSync } = require('child_process');
const fs = require('fs');
const path = require('path');

// Paths
const SOURCE = path.resolve(__dirname, '../dist/light-preset-manager.js');
const TARGETS = [
  path.resolve(__dirname, '../../custom_components/light_preset_manager/frontend/light-preset-manager.js'),
];

// Helper: copy built file to all targets
function copyToTargets() {
  for (const target of TARGETS) {
    const dir = path.dirname(target);
    if (!fs.existsSync(dir)) {
      fs.mkdirSync(dir, { recursive: true });
    }
    try {
      fs.copyFileSync(SOURCE, target);
    } catch (err) {
      // Ignore errors on first run (file may not exist yet)
    }
  }
  const time = new Date().toLocaleTimeString();
  console.log(`📦 [${time}] Copied to all targets`);
}

// Helper: format current time
function time() {
  return new Date().toLocaleTimeString();
}

// Start message
console.log('🚀 Starting development server...');
console.log('');

// Start esbuild in watch mode
const esbuild = spawn('npx', [
  'esbuild',
  'src/light-preset-manager.ts',
  '--bundle',
  '--format=esm',
  '--outfile=dist/light-preset-manager.js',
  '--sourcemap',  // Enables debugging in browser
  '--watch'
], {
  cwd: path.resolve(__dirname, '..'),
  shell: true,
  stdio: 'pipe'
});

// Handle esbuild output
esbuild.stdout.on('data', (data) => {
  const output = data.toString().trim();
  if (!output) return;
  
  console.log(output);
  
  // When esbuild says "watching" or "done", copy the files
  if (output.includes('watching') || output.includes('done')) {
    copyToTargets();
    console.log(`✅ [${time()}] Ready - Refresh your browser (Ctrl+Shift+R)`);
    console.log('');
  }
});

// Handle esbuild errors
esbuild.stderr.on('data', (data) => {
  console.error(`❌ ${data.toString().trim()}`);
});

// Handle process exit
esbuild.on('close', (code) => {
  console.log(`\n⏹️  esbuild stopped (code ${code})`);
});

// Handle Ctrl+C gracefully
process.on('SIGINT', () => {
  console.log('\n👋 Stopping...');
  esbuild.kill();
  process.exit();
});