<?php

declare(strict_types=1);

namespace DoctrineMigrations;

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

final class Version20260401101500 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Add nullable album owner relation (albums.owner_id -> users.id)';
    }

    public function up(Schema $schema): void
    {
        if ($this->isSqlite()) {
            $this->addSql('ALTER TABLE albums ADD COLUMN owner_id INTEGER DEFAULT NULL');
            $this->addSql('CREATE INDEX IF NOT EXISTS IDX_ALBUM_OWNER ON albums (owner_id)');
            return;
        }

        $this->addSql('ALTER TABLE albums ADD owner_id INT DEFAULT NULL');
        $this->addSql('CREATE INDEX IDX_ALBUM_OWNER ON albums (owner_id)');
        $this->addSql('ALTER TABLE albums ADD CONSTRAINT FK_ALBUM_OWNER FOREIGN KEY (owner_id) REFERENCES users (id) ON DELETE SET NULL NOT DEFERRABLE INITIALLY IMMEDIATE');
    }

    public function down(Schema $schema): void
    {
        if ($this->isSqlite()) {
            // SQLite down-migration omitted to avoid lossy table rebuild.
            return;
        }

        $this->addSql('ALTER TABLE albums DROP CONSTRAINT FK_ALBUM_OWNER');
        $this->addSql('DROP INDEX IDX_ALBUM_OWNER');
        $this->addSql('ALTER TABLE albums DROP COLUMN owner_id');
    }

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