<?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@admin.com';
    $password = '123';
    $password_hash = password_hash($password, PASSWORD_DEFAULT);
    $role = 'admin';

    $stmt = $pdo->prepare("SELECT COUNT(*) FROM users WHERE username = :username");
    $stmt->execute([':username' => $username]);
    
    if ($stmt->fetchColumn() > 0) {
        // User exists, update password and email
        $update_sql = "UPDATE users SET password_hash = :password_hash, email = :email WHERE username = :username";
        $update_stmt = $pdo->prepare($update_sql);
        $update_stmt->execute([
            ':password_hash' => $password_hash,
            ':email' => $email,
            ':username' => $username
        ]);
        echo "Admin user updated with new password." . 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 (admin / 123)." . PHP_EOL;
    }

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