const fs = require('fs');
const path = require('path');

/**
 * Copy Assets Script for SerpentRace Backend
 * Copies non-TypeScript files to the dist directory
 */

const srcDir = path.join(__dirname, '..', 'src');
const distDir = path.join(__dirname, '..', 'dist');

// File extensions to copy
const assetExtensions = ['.json', '.html', '.css', '.png', '.jpg', '.jpeg', '.gif', '.svg', '.ico', '.woff', '.woff2', '.ttf', '.eot'];

// Directories to exclude from copying
const excludeDirs = ['node_modules', '.git', 'tests', '__tests__'];

function copyAssets(srcPath, distPath) {
    if (!fs.existsSync(srcPath)) {
        console.log(`Source directory ${srcPath} does not exist`);
        return;
    }

    if (!fs.existsSync(distPath)) {
        fs.mkdirSync(distPath, { recursive: true });
    }

    const items = fs.readdirSync(srcPath);

    items.forEach(item => {
        const srcItemPath = path.join(srcPath, item);
        const distItemPath = path.join(distPath, item);
        const stat = fs.statSync(srcItemPath);

        if (stat.isDirectory()) {
            // Skip excluded directories
            if (excludeDirs.includes(item)) {
                return;
            }
            
            // Recursively copy subdirectories
            copyAssets(srcItemPath, distItemPath);
        } else {
            const ext = path.extname(item).toLowerCase();
            
            // Copy asset files
            if (assetExtensions.includes(ext)) {
                console.log(`Copying asset: ${srcItemPath} -> ${distItemPath}`);
                fs.copyFileSync(srcItemPath, distItemPath);
            }
        }
    });
}

try {
    console.log('Copying assets from src to dist...');
    copyAssets(srcDir, distDir);
    console.log('Asset copying completed successfully!');
} catch (error) {
    console.error('Error copying assets:', error);
    process.exit(1);
}