/**
 * Red Valley — NUI Simulator Server
 * Scans a FiveM server folder for NUI resources and serves them for browser testing.
 * 
 * Usage:  node server.js [path-to-server-folder]
 * Default path: parent directory (../)
 */

const express = require('express');
const path = require('path');
const fs = require('fs');
const { exec } = require('child_process');

// ============ CONFIG ============
const PORT = 3200;
const args = process.argv.slice(2);
const SERVER_PATH = args.find(a => !a.startsWith('--')) || path.resolve(__dirname, '..');
const RESOURCES_PATH = path.join(SERVER_PATH, 'resources');
const AUTO_OPEN = args.includes('--open');

// ============ NUI SCANNER ============

/**
 * Recursively find all fxmanifest.lua / __resource.lua files
 */
function findManifests(dir, results = []) {
    try {
        const entries = fs.readdirSync(dir, { withFileTypes: true });
        for (const entry of entries) {
            const fullPath = path.join(dir, entry.name);
            if (entry.isDirectory()) {
                // Skip node_modules, .git, stream folders
                if (['node_modules', '.git', 'stream', 'streams'].includes(entry.name)) continue;
                findManifests(fullPath, results);
            } else if (entry.name === 'fxmanifest.lua' || entry.name === '__resource.lua') {
                results.push(fullPath);
            }
        }
    } catch (e) {
        // Permission denied or similar - skip
    }
    return results;
}

/**
 * Parse a fxmanifest.lua to extract ui_page directive
 */
function parseManifest(manifestPath) {
    try {
        const content = fs.readFileSync(manifestPath, 'utf-8');
        
        // Match ui_page 'path' or ui_page "path" or ui_page('path') etc.
        const patterns = [
            /ui_page\s*[\(\{]?\s*['"]([^'"]+)['"]\s*[\)\}]?/i,
            /ui_page\s+['"]([^'"]+)['"]/i,
        ];
        
        for (const pattern of patterns) {
            const match = content.match(pattern);
            if (match) {
                return match[1];
            }
        }
    } catch (e) {
        // Can't read file
    }
    return null;
}

/**
 * Extract resource name from path
 */
function getResourceName(manifestPath) {
    const dir = path.dirname(manifestPath);
    return path.basename(dir);
}

/**
 * Get category/tags based on folder structure
 */
function categorize(relativePath) {
    const rp = relativePath.toLowerCase();
    if (rp.includes('[core]')) return { tag: 'core', color: '#c084fc' };
    if (rp.includes('[depends]')) return { tag: 'depends', color: '#60a5fa' };
    if (rp.includes('[addons]')) return { tag: 'addon', color: '#f59e0b' };
    if (rp.includes('[jobs]')) return { tag: 'job', color: '#22c55e' };
    if (rp.includes('[auth]')) return { tag: 'auth', color: '#f472b6' };
    if (rp.includes('[ui]')) return { tag: 'ui', color: '#38bdf8' };
    if (rp.includes('[legal]')) return { tag: 'legal', color: '#34d399' };
    return { tag: 'other', color: '#8b8d94' };
}

/**
 * Auto-detect icon based on resource name
 */
function getIcon(name) {
    const icons = {
        'phone': '📱', 'radio': '📻', 'hud': '📊', 'menu': '📋',
        'target': '🎯', 'input': '📝', 'notify': '🔔', 'sound': '🔊',
        'progress': '⏳', 'banking': '🏦', 'casino': '🎰', 'dice': '🎲',
        'admin': '⚙️', 'ambulance': '🚑', 'police': '🚔', 'mechanic': '🔧',
        'dispatch': '📻', 'boss': '👔', 'character': '👤', 'license': '🔒',
        'job': '💼', 'garbage': '🗑️', 'lumber': '🪓', 'miner': '⛏️',
        'oil': '🛢️', 'bus': '🚌', 'car': '🚗', 'tuning': '🏎️',
        'driver': '🏫', 'anim': '💃', 'dyno': '📈', 'smart': '📱',
    };
    
    const nameLower = name.toLowerCase();
    for (const [key, icon] of Object.entries(icons)) {
        if (nameLower.includes(key)) return icon;
    }
    return '📦';
}

/**
 * Scan all resources and return NUI info
 */
function scanNUIs() {
    console.log(`\n  🔍 Scanning: ${RESOURCES_PATH}\n`);
    
    if (!fs.existsSync(RESOURCES_PATH)) {
        console.error(`  ❌ Resources folder not found: ${RESOURCES_PATH}`);
        process.exit(1);
    }

    const manifests = findManifests(RESOURCES_PATH);
    console.log(`  📄 Found ${manifests.length} manifest files`);

    const nuis = [];
    for (const mf of manifests) {
        const uiPage = parseManifest(mf);
        if (uiPage) {
            const resourceDir = path.dirname(mf);
            const name = getResourceName(mf);
            const relativePath = path.relative(RESOURCES_PATH, resourceDir).replace(/\\/g, '/');
            const uiFullPath = path.join(resourceDir, uiPage);
            const category = categorize(relativePath);
            
            // Check if the UI file actually exists
            const exists = fs.existsSync(uiFullPath);
            
            nuis.push({
                name,
                path: relativePath,
                uiPage,
                uiFullPath: path.relative(RESOURCES_PATH, uiFullPath).replace(/\\/g, '/'),
                exists,
                icon: getIcon(name),
                ...category,
            });
        }
    }

    // Sort: existing first, then alphabetically
    nuis.sort((a, b) => {
        if (a.exists !== b.exists) return b.exists - a.exists;
        return a.name.localeCompare(b.name);
    });

    console.log(`  🎨 Found ${nuis.length} NUI resources\n`);
    nuis.forEach(n => {
        const status = n.exists ? '✅' : '⚠️';
        console.log(`  ${status} ${n.icon} ${n.name} → ${n.uiPage}`);
    });
    console.log('');

    return nuis;
}

// ============ SERVER ============

const app = express();

// Scan NUIs at startup
const discoveredNUIs = scanNUIs();

// API: return discovered NUIs
app.get('/api/nuis', (req, res) => {
    res.json(discoveredNUIs);
});

// API: rescan
app.get('/api/rescan', (req, res) => {
    const fresh = scanNUIs();
    discoveredNUIs.length = 0;
    discoveredNUIs.push(...fresh);
    res.json(fresh);
});

// Serve NUI files from resources folder
app.use('/resources', express.static(RESOURCES_PATH));

// Serve mock files from docs folder
app.use('/mocks', express.static(path.join(SERVER_PATH, 'docs')));

// Serve the simulator UI
app.use(express.static(path.join(__dirname, 'public')));

// Start
app.listen(PORT, () => {
    const url = `http://localhost:${PORT}`;
    console.log(`  ╔═══════════════════════════════════════════════════╗`);
    console.log(`  ║                                                   ║`);
    console.log(`  ║   🎮  Red Valley — NUI Simulator                  ║`);
    console.log(`  ║                                                   ║`);
    console.log(`  ║   Server: ${url}                      ║`);
    console.log(`  ║   Resources: ${discoveredNUIs.length} NUIs discovered                 ║`);
    console.log(`  ║                                                   ║`);
    console.log(`  ╚═══════════════════════════════════════════════════╝\n`);

    // Auto-open browser
    if (AUTO_OPEN) {
        const cmd = process.platform === 'win32' ? 'start' : 'open';
        exec(`${cmd} ${url}`);
    }
});