const fs = require('fs');
const path = require('path');
const { minify: minifyJs } = require('terser');

// Minify JavaScript files
const jsFiles = [
  'js/shared.js'
];

// Minify CSS files (simple approach - remove whitespace and comments)
function minifyCss(content) {
  return content
    .replace(/\/\*[\s\S]*?\*\//g, '')  // Remove multi-line comments
    .replace(/\/\*.*\*\//g, '')        // Remove single-line comments
    .replace(/\s+/g, ' ')               // Collapse whitespace
    .replace(/\s*([{}:;,>])\s*/g, '$1') // Remove spaces around brackets
    .replace(/\s*\n\s*/g, '\n')        // Remove empty lines
    .replace(/\n/g, '')                 // Remove all newlines
    .trim();
}

async function minifyAll() {
  // Minify JS files
  for (const file of jsFiles) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const result = await minifyJs(content, {
        compress: {
          drop_console: false,
          keep_fnames: false,
          passes: 2
        },
        mangle: true,
        format: {
          beautify: false,
          comments: false
        }
      });
      
      const outputPath = file.replace('.js', '.min.js');
      fs.writeFileSync(outputPath, result.code);
      console.log(`Minified: ${file} -> ${outputPath}`);
    } catch (error) {
      console.error(`Error minifying ${file}:`, error);
    }
  }

  // Minify CSS files
  const cssFiles = [
    'css/shared.css',
    'css/variables.css'
  ];

  for (const file of cssFiles) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const minified = minifyCss(content);
      const outputPath = file.replace('.css', '.min.css');
      fs.writeFileSync(outputPath, minified);
      console.log(`Minified: ${file} -> ${outputPath}`);
    } catch (error) {
      console.error(`Error minifying ${file}:`, error);
    }
  }
}

minifyAll().catch(console.error);