<?php
declare(strict_types=1);

namespace Modules\MiningChecker\Infrastructure;

use App\Database as AppDatabase;
use Modules\MiningChecker\Support\ApiException;
use PDO;

final class ConnectionFactory
{
    public static function make(ModuleConfig $config): PDO
    {
        $moduleSettings = modules()->settings('mining-checker');
        $useSeparateDb = self::usesSeparateDatabase($moduleSettings);

        if ($useSeparateDb) {
            $dbConfig = is_array($moduleSettings['db'] ?? null) ? $moduleSettings['db'] : [];
            if ($dbConfig === []) {
                throw new ApiException('Custom-Datenbank ist aktiviert, aber nicht vollstaendig konfiguriert.', 500);
            }
            self::assertSupportedDriver($dbConfig);
            if (method_exists(AppDatabase::class, 'connectFromConfig')) {
                return AppDatabase::connectFromConfig($dbConfig);
            }
            return AppDatabase::createFromArray($dbConfig);
        }

        $dbConfig = app()->config()->dbConfig;
        if ($dbConfig === []) {
            throw new ApiException('Projekt-Datenbankkonfiguration fehlt in config/db_settings_basic.php.', 500);
        }

        self::assertSupportedDriver($dbConfig);

        if (method_exists(AppDatabase::class, 'connectFromConfig')) {
            return AppDatabase::connectFromConfig($dbConfig);
        }

        return AppDatabase::createFromArray($dbConfig);
    }

    private static function usesSeparateDatabase(array $moduleSettings): bool
    {
        $raw = $moduleSettings['use_separate_db'] ?? false;
        if (is_bool($raw)) {
            return $raw;
        }

        $normalized = strtolower(trim((string) $raw));
        return in_array($normalized, ['1', 'true', 'yes', 'on', 'custom'], true);
    }

    private static function assertSupportedDriver(array $dbConfig): void
    {
        $driver = strtolower((string) ($dbConfig['driver'] ?? ($dbConfig['dsn'] ?? '')));
        if ($driver !== '' && !in_array($driver, ['mysql', 'pgsql'], true) && !str_starts_with($driver, 'mysql:') && !str_starts_with($driver, 'pgsql:')) {
            throw new ApiException(
                'Mining-Checker unterstuetzt aktuell MySQL/MariaDB und PostgreSQL. Stelle den Driver auf mysql oder pgsql.',
                500,
                ['driver' => $dbConfig['driver'] ?? 'unknown']
            );
        }
    }
}