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

try {
    $pdo = db();

    // 1. Create migrations table if it doesn't exist
    $pdo->exec("CREATE TABLE IF NOT EXISTS `migrations` ( `id` INT AUTO_INCREMENT PRIMARY KEY, `migration` VARCHAR(255) NOT NULL, `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP );");

    // 2. Get all executed migrations
    $stmt = $pdo->query("SELECT `migration` FROM `migrations`");
    $executed_migrations = $stmt->fetchAll(PDO::FETCH_COLUMN);

    // 3. Find and execute new migrations
    $migration_files = glob(__DIR__ . '/migrations/*.sql');
    sort($migration_files);

    $new_migrations_found = false;
    foreach ($migration_files as $migration_file) {
        $migration_name = basename($migration_file);

        if (!in_array($migration_name, $executed_migrations)) {
            $new_migrations_found = true;
            $sql = file_get_contents($migration_file);
            
            try {
                $pdo->exec($sql);
                
                // 4. Log the new migration
                $insert_stmt = $pdo->prepare("INSERT INTO `migrations` (`migration`) VALUES (?)");
                $insert_stmt->execute([$migration_name]);
                
                echo "Executed migration: " . $migration_name . PHP_EOL;
            } catch (PDOException $e) {
                // If a specific migration fails, output the error and stop.
                die("Migration failed on " . $migration_name . ": " . $e->getMessage() . PHP_EOL);
            }
        }
    }

    if (!$new_migrations_found) {
        echo "No new migrations to execute." . PHP_EOL;
    } else {
        echo "All new migrations executed successfully." . PHP_EOL;
    }

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