<?php

declare(strict_types=1);

namespace DoctrineMigrations;

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

final class Version20260325081258 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Create observations table with unique constraint on (employee_id, month)';
    }

    public function up(Schema $schema): void
    {
        $this->addSql('CREATE TABLE observations (id INT GENERATED BY DEFAULT AS IDENTITY NOT NULL, employee_id INT NOT NULL, month DATE NOT NULL, content TEXT NOT NULL, created_at TIMESTAMP(0) WITHOUT TIME ZONE NOT NULL, PRIMARY KEY (id))');
        $this->addSql('CREATE INDEX IDX_BBC15BA88C03F15C ON observations (employee_id)');
        $this->addSql('CREATE UNIQUE INDEX uniq_observation_employee_month ON observations (employee_id, month)');
        $this->addSql('ALTER TABLE observations ADD CONSTRAINT FK_BBC15BA88C03F15C FOREIGN KEY (employee_id) REFERENCES employees (id) NOT DEFERRABLE');
        $this->addSql("COMMENT ON COLUMN observations.month IS '(DC2Type:date_immutable)'");
        $this->addSql("COMMENT ON COLUMN observations.created_at IS '(DC2Type:datetime_immutable)'");
    }

    public function down(Schema $schema): void
    {
        $this->addSql('ALTER TABLE observations DROP CONSTRAINT FK_BBC15BA88C03F15C');
        $this->addSql('DROP TABLE observations');
    }
}
