<?php

declare(strict_types=1);

namespace DoctrineMigrations;

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

/**
 * Bascule de Bovine.breed_code (string) vers une relation Bovine.bovine_type_id (FK).
 * Ajoute au passage les BovineType manquants (Aubrac=14, Croisé=39, Blonde d'aquitaine=79).
 */
final class Version20260428065800 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Migration breedCode -> relation BovineType + ajout des races manquantes.';
    }

    public function up(Schema $schema): void
    {
        // 1. Insertion des BovineType manquants (idempotent via NOT EXISTS).
        $this->addSql("INSERT INTO bovine_type (label, code) SELECT 'Aubrac', '14' WHERE NOT EXISTS (SELECT 1 FROM bovine_type WHERE code = '14')");
        $this->addSql("INSERT INTO bovine_type (label, code) SELECT 'Croisé', '39' WHERE NOT EXISTS (SELECT 1 FROM bovine_type WHERE code = '39')");
        $this->addSql("INSERT INTO bovine_type (label, code) SELECT 'Blonde d''aquitaine', '79' WHERE NOT EXISTS (SELECT 1 FROM bovine_type WHERE code = '79')");

        // 2. Ajout de la colonne FK + index.
        $this->addSql('ALTER TABLE bovine ADD bovine_type_id INT DEFAULT NULL');
        $this->addSql('CREATE INDEX IDX_2068337F7899F32E ON bovine (bovine_type_id)');

        // 3. Backfill : associe chaque bovin à son BovineType via le code.
        $this->addSql('UPDATE bovine SET bovine_type_id = (SELECT id FROM bovine_type WHERE bovine_type.code = bovine.breed_code) WHERE breed_code IS NOT NULL');

        // 4. Contrainte de clé étrangère (après backfill pour éviter une violation transitoire).
        $this->addSql('ALTER TABLE bovine ADD CONSTRAINT FK_2068337F7899F32E FOREIGN KEY (bovine_type_id) REFERENCES bovine_type (id)');

        // 5. Drop de l'ancienne colonne string.
        $this->addSql('ALTER TABLE bovine DROP breed_code');
    }

    public function down(Schema $schema): void
    {
        $this->addSql('ALTER TABLE bovine ADD breed_code VARCHAR(20) DEFAULT NULL');
        $this->addSql('UPDATE bovine SET breed_code = (SELECT code FROM bovine_type WHERE bovine_type.id = bovine.bovine_type_id) WHERE bovine_type_id IS NOT NULL');
        $this->addSql('ALTER TABLE bovine DROP CONSTRAINT FK_2068337F7899F32E');
        $this->addSql('DROP INDEX IDX_2068337F7899F32E');
        $this->addSql('ALTER TABLE bovine DROP bovine_type_id');
    }
}