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

echo "Starting migration process...\n";

try {
    $pdo = db();

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

    // 2. Get all migrations that have been run
    $ran_migrations_stmt = $pdo->query("SELECT migration FROM migrations");
    $ran_migrations = $ran_migrations_stmt->fetchAll(PDO::FETCH_COLUMN);

    // 3. Get all migration files
    $migration_files = glob(__DIR__ . '/migrations/*.sql');
    sort($migration_files);

    $migrations_to_run = array_filter($migration_files, function($file) use ($ran_migrations) {
        return !in_array(basename($file), $ran_migrations);
    });

    if (empty($migrations_to_run)) {
        echo "No new migrations to run.\n";
    } else {
        foreach ($migrations_to_run as $file) {
            echo "Running migration: " . basename($file) . "...\n";
            $sql = file_get_contents($file);
            $pdo->exec($sql);

            // 4. Record the migration
            $stmt = $pdo->prepare("INSERT INTO migrations (migration) VALUES (?)");
            $stmt->execute([basename($file)]);
            echo "Migration successful: " . basename($file) . "\n";
        }
    }

} catch (PDOException $e) {
    die("Migration failed: " . $e->getMessage() . "\n");
}