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

echo "Starting database setup...\n";

try {
    // Connect without specifying a database to create it if it doesn't exist
    $pdo_setup = new PDO('mysql:host='.DB_HOST.';charset=utf8mb4', DB_USER, DB_PASS, [
      PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
    ]);
    $pdo_setup->exec('CREATE DATABASE IF NOT EXISTS `'.DB_NAME.'`');
    echo "Database `".DB_NAME."` ensured to exist.\n";

    // Now connect to the database
    $pdo = db();
    
    // 1. Ensure migrations table exists
    $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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;");

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

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

    // 4. Run pending migrations
    foreach ($migrationFiles as $file) {
        $migrationName = basename($file);
        if (!in_array($migrationName, $executedMigrations)) {
            echo "Running migration: " . $migrationName . "\n";
            $sql = file_get_contents($file);
            $pdo->exec($sql);

            // 5. Log the migration
            $stmt = $pdo->prepare("INSERT INTO migrations (migration) VALUES (?)");
            $stmt->execute([$migrationName]);
        }
    }

    echo "Migrations completed successfully.\n";

} catch (PDOException $e) {
    die("Database setup or migration failed: " . $e->getMessage() . "\n");
}