<?php

declare(strict_types=1);

namespace DoctrineMigrations;

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

final class Version20260221000100 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Adds tagging system for DocumentVersion (Tag + document_version_tag)';
    }

    public function up(Schema $schema): void
    {
        // --------------------------------------------------
        // TAG TABLE
        // --------------------------------------------------

        $this->addSql("
            CREATE TABLE tag (
                id UUID NOT NULL,
                name VARCHAR(120) NOT NULL,
                slug VARCHAR(120) NOT NULL,
                created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL,
                PRIMARY KEY(id)
            )
        ");

        $this->addSql("
            CREATE UNIQUE INDEX uniq_tag_slug ON tag (slug)
        ");

        // --------------------------------------------------
        // DOCUMENT_VERSION_TAG (ManyToMany)
        // --------------------------------------------------

        $this->addSql("
            CREATE TABLE document_version_tag (
                document_version_id UUID NOT NULL,
                tag_id UUID NOT NULL,
                PRIMARY KEY(document_version_id, tag_id)
            )
        ");

        $this->addSql("
            CREATE INDEX idx_dv_tag_version
            ON document_version_tag (document_version_id)
        ");

        $this->addSql("
            CREATE INDEX idx_dv_tag_tag
            ON document_version_tag (tag_id)
        ");

        $this->addSql("
            ALTER TABLE document_version_tag
                ADD CONSTRAINT fk_dv_tag_version
                FOREIGN KEY (document_version_id)
                REFERENCES document_version (id)
                ON DELETE CASCADE
        ");

        $this->addSql("
            ALTER TABLE document_version_tag
                ADD CONSTRAINT fk_dv_tag_tag
                FOREIGN KEY (tag_id)
                REFERENCES tag (id)
                ON DELETE CASCADE
        ");
    }

    public function down(Schema $schema): void
    {
        $this->addSql("DROP TABLE document_version_tag");
        $this->addSql("DROP TABLE tag");
    }
}