<?php

declare(strict_types=1);

namespace andrewkydev\Database;

use andrewkydev\Database\Config\DatabaseConfigLoader;
use andrewkydev\Database\Connection\ConnectionManager;
use andrewkydev\Database\Migration\MigrationManager;
use andrewkydev\Database\ORM\EntityManager;
use andrewkydev\Database\Query\QueryRunner;
use andrewkydev\Database\Schema\SchemaManager;
use pocketmine\plugin\PluginBase;

final class Loader extends PluginBase {
    private ?DatabaseApi $api = null;

    public function onEnable(): void {
        $this->saveDefaultConfig();

        $config = DatabaseConfigLoader::load($this->getConfig());
        $this->assertExtensions($config->driver);

        $connections = new ConnectionManager($config);
        $schema = new SchemaManager($connections, $config);
        $query = new QueryRunner($connections, $config);
        $orm = new EntityManager($connections, $config);
        $orm->cache()->attachPlugin($this, $orm);

        $migrations = new MigrationManager($schema, $query, $config);
        $this->api = new DatabaseApi($schema, $query, $orm, $connections, $config, $migrations);
        DatabaseProvider::set($this->api);
    }

    public function onDisable(): void {
        if ($this->api !== null) {
            $this->api->close();
        }
        DatabaseProvider::set(null);
        $this->api = null;
    }

    private function assertExtensions(string $driver): void {
        if (!extension_loaded('pdo')) {
            throw new \RuntimeException('PDO extension is required');
        }
        if ($driver === 'mysql' && !extension_loaded('pdo_mysql')) {
            throw new \RuntimeException('pdo_mysql extension is required for MySQL');
        }
        if ($driver === 'postgres' && !extension_loaded('pdo_pgsql')) {
            throw new \RuntimeException('pdo_pgsql extension is required for PostgreSQL');
        }
    }
}