<?php
require_once __DIR__ . '/config.php';

try {
    $pdo = db();

    // Users Table
    $pdo->exec("CREATE TABLE IF NOT EXISTS users (
        id INT AUTO_INCREMENT PRIMARY KEY,
        full_name VARCHAR(100) NOT NULL,
        email VARCHAR(100) NOT NULL UNIQUE,
        password VARCHAR(255) NOT NULL,
        phone VARCHAR(20),
        role ENUM('admin', 'user') DEFAULT 'user',
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    ) ENGINE=InnoDB;");

    // Cars Table
    $pdo->exec("CREATE TABLE IF NOT EXISTS cars (
        id INT AUTO_INCREMENT PRIMARY KEY,
        owner_id INT NULL,
        title VARCHAR(255) NOT NULL,
        brand VARCHAR(100) NOT NULL,
        model VARCHAR(100) NOT NULL,
        year INT NOT NULL,
        price DECIMAL(12, 2) NOT NULL,
        location VARCHAR(100) NOT NULL,
        fuel_type VARCHAR(50),
        transmission VARCHAR(50),
        mileage INT,
        description TEXT,
        image_url VARCHAR(255),
        status ENUM('available', 'sold') DEFAULT 'available',
        approval_status ENUM('pending', 'approved', 'rejected') DEFAULT 'approved',
        view_count INT DEFAULT 0,
        badge VARCHAR(50) NULL,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (owner_id) REFERENCES users(id) ON DELETE SET NULL
    ) ENGINE=InnoDB;");

    // Reviews Table
    $pdo->exec("CREATE TABLE IF NOT EXISTS reviews (
        id INT AUTO_INCREMENT PRIMARY KEY,
        user_id INT NOT NULL,
        car_id INT NOT NULL,
        rating INT NOT NULL CHECK (rating >= 1 AND rating <= 5),
        comment TEXT,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
        FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
    ) ENGINE=InnoDB;");

    // Notifications Table
    $pdo->exec("CREATE TABLE IF NOT EXISTS notifications (
        id INT AUTO_INCREMENT PRIMARY KEY,
        user_id INT NULL,
        message TEXT NOT NULL,
        type VARCHAR(50) DEFAULT 'info',
        is_read TINYINT(1) DEFAULT 0,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    ) ENGINE=InnoDB;");

    // Purchases Table
    $pdo->exec("CREATE TABLE IF NOT EXISTS purchases (
        id INT AUTO_INCREMENT PRIMARY KEY,
        user_id INT NOT NULL,
        car_id INT NOT NULL,
        amount DECIMAL(12, 2) NOT NULL,
        bank_name VARCHAR(100) NOT NULL,
        transaction_id VARCHAR(100) NOT NULL,
        status ENUM('pending', 'completed', 'failed') DEFAULT 'completed',
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
        FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
    ) ENGINE=InnoDB;");

    // Favorites Table
    $pdo->exec("CREATE TABLE IF NOT EXISTS favorites (
        id INT AUTO_INCREMENT PRIMARY KEY,
        user_id INT NOT NULL,
        car_id INT NOT NULL,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        UNIQUE KEY user_car (user_id, car_id),
        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
        FOREIGN KEY (car_id) REFERENCES cars(id) ON DELETE CASCADE
    ) ENGINE=InnoDB;");

    // Create Admin if not exists
    $adminEmail = 'admin@gmail.com';
    $stmt = $pdo->prepare("SELECT id FROM users WHERE email = ?");
    $stmt->execute([$adminEmail]);
    if (!$stmt->fetch()) {
        $pass = password_hash('12345678', PASSWORD_DEFAULT);
        $pdo->prepare("INSERT INTO users (full_name, email, password, role) VALUES (?, ?, ?, ?)")
            ->execute(['Admin User', $adminEmail, $pass, 'admin']);
        echo "Admin user created (admin@gmail.com / 12345678)\n";
    } else {
        // Update password just in case
        $pass = password_hash('12345678', PASSWORD_DEFAULT);
        $pdo->prepare("UPDATE users SET password = ? WHERE email = ?")->execute([$pass, $adminEmail]);
        echo "Admin password verified/updated.\n";
    }

    // Insert cars if empty
    $stmt = $pdo->query("SELECT COUNT(*) FROM cars");
    if ($stmt->fetchColumn() == 0) {
        $sampleCars = [
            ['Toyota Corolla 2022', 'Toyota', 'Corolla', 2022, 18500, 'Kabul', 'Petrol', 'Automatic', 12000, 'Like new condition, full options.', 'https://images.pexels.com/photos/3311574/pexels-photo-3311574.jpeg?auto=compress&cs=tinysrgb&w=800'],
            ['Lexus LX570 2018', 'Lexus', 'LX570', 2018, 75000, 'Herat', 'Petrol', 'Automatic', 45000, 'Powerful SUV, VIP interior.', 'https://images.pexels.com/photos/170811/pexels-photo-170811.jpeg?auto=compress&cs=tinysrgb&w=800'],
            ['Mercedes-Benz C300', 'Mercedes-Benz', 'C300', 2020, 32000, 'Mazar-i-Sharif', 'Petrol', 'Automatic', 25000, 'Excellent fuel efficiency and comfort.', 'https://images.pexels.com/photos/120049/pexels-photo-120049.jpeg?auto=compress&cs=tinysrgb&w=800'],
            ['Toyota Land Cruiser Prado', 'Toyota', 'Prado', 2019, 55000, 'Kabul', 'Diesel', 'Automatic', 30000, 'Perfect for off-road and city driving.', 'https://images.pexels.com/photos/112460/pexels-photo-112460.jpeg?auto=compress&cs=tinysrgb&w=800'],
            ['Hyundai Elantra', 'Hyundai', 'Elantra', 2021, 21000, 'Kabul', 'Petrol', 'Automatic', 15000, 'Modern design and great fuel economy.', 'https://images.pexels.com/photos/3752162/pexels-photo-3752162.jpeg?auto=compress&cs=tinysrgb&w=800']
        ];

        $insert = $pdo->prepare("INSERT INTO cars (title, brand, model, year, price, location, fuel_type, transmission, mileage, description, image_url, approval_status) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'approved')");
        foreach ($sampleCars as $car) {
            $insert->execute($car);
        }
        echo "Database populated with cars.\n";
    }

} catch (PDOException $e) {
    die("Database Error: " . $e->getMessage());
}