<?php
require_once 'config.php';

try {
    $pdo = db();
    $sql = "
    CREATE TABLE IF NOT EXISTS users (
        id INT AUTO_INCREMENT PRIMARY KEY,
        username VARCHAR(255) NOT NULL UNIQUE,
        email VARCHAR(255) NOT NULL UNIQUE,
        password_hash VARCHAR(255) NOT NULL,
        role ENUM('user', 'admin') NOT NULL DEFAULT 'user',
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    );
    ";
    $pdo->exec($sql);
    echo "Table 'users' created successfully." . PHP_EOL;

    // Add or update the admin user
    $username = 'admin'; 
    $email = 'admin@gmail.com';
    $password = '12345678';
    $password_hash = password_hash($password, PASSWORD_DEFAULT);
    $role = 'admin';

    // Check if admin already exists by email
    $stmt = $pdo->prepare("SELECT id FROM users WHERE email = :email LIMIT 1");
    $stmt->execute([':email' => $email]);
    $admin = $stmt->fetch();
    
    if ($admin) {
        // Update the existing admin
        $update_sql = "UPDATE users SET username = :username, password_hash = :password_hash, role = :role WHERE id = :id";
        $update_stmt = $pdo->prepare($update_sql);
        $update_stmt->execute([
            ':username' => $username,
            ':password_hash' => $password_hash,
            ':role' => $role,
            ':id' => $admin['id']
        ]);
        echo "Admin user updated. Username: '$username', Email: '$email'." . PHP_EOL;
    } else {
        // User does not exist, insert new admin user
        $insert_sql = "
        INSERT INTO users (username, email, password_hash, role)
        VALUES (:username, :email, :password_hash, :role);
        ";
        $insert_stmt = $pdo->prepare($insert_sql);
        $insert_stmt->execute([
            ':username' => $username,
            ':email' => $email,
            ':password_hash' => $password_hash,
            ':role' => $role
        ]);
        echo "Default admin user created. Username: '$username', Email: '$email' (Password: $password)." . PHP_EOL;
    }

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