<?php

declare(strict_types=1);

namespace DoctrineMigrations;

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

final class Version20260227174500 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Drop legacy Spotify and unused album columns (created_by_id, cover_url, local_id, cover_image_path)';
    }

    public function up(Schema $schema): void
    {
        if ($this->isSqlite()) {
            // SQLite column drops/constraint rewrites are intentionally skipped in this migration.
            return;
        }

        if ($this->hasTable($schema, 'albums')) {
            $this->addSql('ALTER TABLE albums DROP CONSTRAINT IF EXISTS FK_F4E2474FB03A8386');
            $this->addSql('DROP INDEX IF EXISTS IDX_F4E2474FB03A8386');
            $this->addSql('DROP INDEX IF EXISTS uniq_album_local_id');
            $this->addSql('DROP INDEX IF EXISTS UNIQ_F4E2474F5D5A2101');
            $this->addSql('DROP INDEX IF EXISTS UNIQ_F4E2474FA905FC5C');

            if ($this->hasColumn($schema, 'albums', 'created_by_id')) {
                $this->addSql('ALTER TABLE albums DROP COLUMN created_by_id');
            }
            if ($this->hasColumn($schema, 'albums', 'local_id')) {
                $this->addSql('ALTER TABLE albums DROP COLUMN local_id');
            }
            if ($this->hasColumn($schema, 'albums', 'cover_url')) {
                $this->addSql('ALTER TABLE albums DROP COLUMN cover_url');
            }
            if ($this->hasColumn($schema, 'albums', 'cover_image_path')) {
                $this->addSql('ALTER TABLE albums DROP COLUMN cover_image_path');
            }
            if ($this->hasColumn($schema, 'albums', 'spotify_id')) {
                $this->addSql('ALTER TABLE albums DROP COLUMN spotify_id');
            }
        }

        if ($this->hasColumn($schema, 'album_tracks', 'spotify_track_id')) {
            $this->addSql('ALTER TABLE album_tracks DROP COLUMN spotify_track_id');
        }

        if ($this->hasColumn($schema, 'reviews', 'spotify_album_id')) {
            $this->addSql('ALTER TABLE reviews DROP COLUMN spotify_album_id');
        }
    }

    public function down(Schema $schema): void
    {
        if ($this->isSqlite()) {
            return;
        }

        if ($this->hasTable($schema, 'albums')) {
            if (!$this->hasColumn($schema, 'albums', 'spotify_id')) {
                $this->addSql('ALTER TABLE albums ADD spotify_id VARCHAR(64) DEFAULT NULL');
            }
            if (!$this->hasColumn($schema, 'albums', 'local_id')) {
                $this->addSql('ALTER TABLE albums ADD local_id VARCHAR(64) DEFAULT NULL');
            }
            if (!$this->hasColumn($schema, 'albums', 'created_by_id')) {
                $this->addSql('ALTER TABLE albums ADD created_by_id INT DEFAULT NULL');
            }
            if (!$this->hasColumn($schema, 'albums', 'cover_url')) {
                $this->addSql('ALTER TABLE albums ADD cover_url VARCHAR(1024) DEFAULT NULL');
            }
            if (!$this->hasColumn($schema, 'albums', 'cover_image_path')) {
                $this->addSql('ALTER TABLE albums ADD cover_image_path VARCHAR(255) DEFAULT NULL');
            }

            if (!$this->indexExists($schema, 'albums', 'UNIQ_F4E2474FA905FC5C')) {
                $this->addSql('CREATE UNIQUE INDEX UNIQ_F4E2474FA905FC5C ON albums (spotify_id)');
            }
            if (!$this->indexExists($schema, 'albums', 'UNIQ_F4E2474F5D5A2101')) {
                $this->addSql('CREATE UNIQUE INDEX UNIQ_F4E2474F5D5A2101 ON albums (local_id)');
            }
            if (!$this->indexExists($schema, 'albums', 'IDX_F4E2474FB03A8386')) {
                $this->addSql('CREATE INDEX IDX_F4E2474FB03A8386 ON albums (created_by_id)');
            }

            $this->addSql('ALTER TABLE albums ADD CONSTRAINT FK_F4E2474FB03A8386 FOREIGN KEY (created_by_id) REFERENCES users (id) ON DELETE SET NULL NOT DEFERRABLE INITIALLY IMMEDIATE');
        }

        if (!$this->hasColumn($schema, 'album_tracks', 'spotify_track_id')) {
            $this->addSql('ALTER TABLE album_tracks ADD spotify_track_id VARCHAR(64) DEFAULT NULL');
        }

        if (!$this->hasColumn($schema, 'reviews', 'spotify_album_id')) {
            $this->addSql('ALTER TABLE reviews ADD spotify_album_id VARCHAR(64) DEFAULT NULL');
        }
    }

    private function hasTable(Schema $schema, string $tableName): bool
    {
        return $schema->hasTable($tableName);
    }

    private function hasColumn(Schema $schema, string $tableName, string $columnName): bool
    {
        return $this->hasTable($schema, $tableName) && $schema->getTable($tableName)->hasColumn($columnName);
    }

    private function indexExists(Schema $schema, string $tableName, string $indexName): bool
    {
        return $this->hasTable($schema, $tableName) && $schema->getTable($tableName)->hasIndex($indexName);
    }

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