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

const ASSETS_DIR = path.join(__dirname, '../assets');
const OUTPUT_FILE = path.join(__dirname, '../src/AssetManifest.js');

const CATEGORY_MAP = {
    'buildings': 'farm',
    'crops': 'farm',
    'grounds': 'farm',
    'props': 'farm',
    'terrain': 'farm',
    'characters': 'common',
    'ui': 'common',
    'vfx': 'common',
    'images': 'common',
    'intro_assets': 'common',
    'sprites': 'common', // Treat as regular images for now unless frame config known
    'slike 🟢': 'common'
};

const manifest = {
    phases: {
        farm: [],
        basement_mine: [],
        common: []
    },
    spritesheets: []
};

function scanDir(dir, category) {
    if (!fs.existsSync(dir)) return;

    const files = fs.readdirSync(dir);

    files.forEach(file => {
        const fullPath = path.join(dir, file);
        const stat = fs.statSync(fullPath);

        if (stat.isDirectory()) {
            // Recursive scan
            // Special handling: if dir is 'sprites', maybe subdirs are categories?
            // For now, simple recursion
            scanDir(fullPath, category);
        } else if (file.match(/\.(png|jpg|jpeg)$/i)) {
            const relativePath = 'assets/' + path.relative(ASSETS_DIR, fullPath);
            const key = path.parse(file).name; // Use filename without ext as key

            // Avoid duplicates?
            // Just push for now

            if (category === 'spritesheets') {
                // Try to guess definition or generic
                manifest.spritesheets.push({
                    key: key,
                    path: relativePath,
                    frameConfig: { frameWidth: 32, frameHeight: 32 } // Default guess
                });
            } else {
                if (!manifest.phases[category]) manifest.phases[category] = [];
                manifest.phases[category].push({
                    key: key,
                    path: relativePath
                });
            }
        }
    });
}

// MAIN SCAN LOOP
Object.keys(CATEGORY_MAP).forEach(dirName => {
    const fullDir = path.join(ASSETS_DIR, dirName);
    const cat = CATEGORY_MAP[dirName];
    scanDir(fullDir, cat);
});

// Generate File Content
const fileContent = `window.AssetManifest = ${JSON.stringify(manifest, null, 4)};`;

fs.writeFileSync(OUTPUT_FILE, fileContent);

console.log('✅ AssetManifest.js regenerated!');
console.log(`Farm: ${manifest.phases.farm.length}`);
console.log(`Common: ${manifest.phases.common.length}`);
console.log(`Mine: ${manifest.phases.basement_mine.length}`);