const express = require('express');
const path = require('path');
const fs = require('fs');
const sqlite3 = require('sqlite3').verbose();
const sharp = require('sharp');
require('dotenv').config();

const app = express();
const PORT = process.env.PORT || 3000;
const API_KEY = process.env.HOTEL777KEY;
if (!API_KEY) {
    console.error('FATAL: HOTEL777KEY environment variable not set');
    process.exit(1);
}

// Middleware
app.use(express.json());
app.use(express.static(path.join(__dirname, 'public')));

// Ensure data directory and database
const dataDir = path.join(__dirname, 'data');
if (!fs.existsSync(dataDir)) fs.mkdirSync(dataDir);
const dbPath = path.join(dataDir, 'bookings.db');
const db = new sqlite3.Database(dbPath);

db.run(`CREATE TABLE IF NOT EXISTS bookings (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    name TEXT NOT NULL,
    phone TEXT NOT NULL,
    adults INTEGER NOT NULL,
    children INTEGER NOT NULL,
    checkin_date TEXT NOT NULL,
    checkout_date TEXT NOT NULL,
    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
)`);

// Image conversion (automatically convert JPEG/PNG to WebP)
async function convertImages() {
    const imgDir = path.join(__dirname, 'public', 'img');
    if (!fs.existsSync(imgDir)) {
        console.log('Папка img не найдена, пропускаем конвертацию.');
        return;
    }
    const files = fs.readdirSync(imgDir);
    for (const file of files) {
        const ext = path.extname(file).toLowerCase();
        if (ext === '.jpg' || ext === '.jpeg' || ext === '.png') {
            const name = path.parse(file).name;
            const webpPath = path.join(imgDir, `${name}.webp`);
            if (!fs.existsSync(webpPath)) {
                try {
                    await sharp(path.join(imgDir, file))
                        .webp({ quality: 85 })
                        .toFile(webpPath);
                    console.log(`✅ Сконвертировано: ${file} -> ${name}.webp`);
                } catch (err) {
                    console.error(`❌ Ошибка при конвертации ${file}:`, err);
                }
            }
        }
    }
}

// API: POST /api/bookings – сохранить новую заявку
app.post('/api/bookings', (req, res) => {
    const { name, phone, adults, children, checkin, checkout } = req.body;
    if (!name || !phone || !adults || !checkin || !checkout) {
        return res.status(400).json({ error: 'Missing required fields' });
    }
    const stmt = db.prepare(`INSERT INTO bookings (name, phone, adults, children, checkin_date, checkout_date)
                             VALUES (?, ?, ?, ?, ?, ?)`);
    stmt.run(name, phone, adults, children || 0, checkin, checkout, function(err) {
        if (err) {
            console.error(err);
            return res.status(500).json({ error: 'Database error' });
        }
        res.status(201).json({ id: this.lastID, message: 'Booking saved' });
    });
    stmt.finalize();
});

// API: GET /api/bookings – получить список всех заявок (требуется API-ключ)
app.get('/api/bookings', (req, res) => {
    const providedKey = req.headers['x-api-key'];
    if (!providedKey || providedKey !== API_KEY) {
        return res.status(401).json({ error: 'Invalid or missing API key' });
    }
    db.all(`SELECT id, name, phone, adults, children, checkin_date, checkout_date, created_at
            FROM bookings ORDER BY created_at DESC`, (err, rows) => {
        if (err) {
            console.error(err);
            return res.status(500).json({ error: 'Database error' });
        }
        res.json(rows);
    });
});

// Serve frontend
app.get('/', (req, res) => {
    res.sendFile(path.join(__dirname, 'public', 'index.html'));
});

// Start server after image conversion
convertImages().then(() => {
    app.listen(PORT, () => {
        console.log('✅ HOTEL777KEY is', API_KEY);
        console.log(`✅ Hotel 777 server running on http://localhost:${PORT}`);
    });
});