<?php

declare(strict_types=1);

namespace DoctrineMigrations;

use Doctrine\DBAL\Schema\Schema;
use Doctrine\Migrations\AbstractMigration;

final class Version20251205134500 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Add genres JSON column to albums for advanced search filters';
    }

    public function up(Schema $schema): void
    {
        if (!$this->shouldAddColumn($schema, 'albums', 'genres')) {
            return;
        }

        if ($this->isSqlite()) {
            $this->addSql("ALTER TABLE albums ADD genres CLOB NOT NULL DEFAULT '[]'");
            return;
        }

        $this->addSql("ALTER TABLE albums ADD genres JSON NOT NULL DEFAULT '[]'");
    }

    public function down(Schema $schema): void
    {
        if ($this->isSqlite()) {
            // SQLite cannot drop columns without rebuilding the table; leave as-is.
            return;
        }

        if ($schema->hasTable('albums') && $schema->getTable('albums')->hasColumn('genres')) {
            $this->addSql('ALTER TABLE albums DROP genres');
        }
    }

    private function isSqlite(): bool
    {
        return $this->connection->getDatabasePlatform()->getName() === 'sqlite';
    }

    private function shouldAddColumn(Schema $schema, string $tableName, string $column): bool
    {
        if (!$schema->hasTable($tableName)) {
            return false;
        }

        return !$schema->getTable($tableName)->hasColumn($column);
    }
}