<?php

declare(strict_types=1);

namespace DoctrineMigrations;

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

final class Version20260218120000 extends AbstractMigration
{
    public function getDescription(): string
    {
        return 'Replace employee contract_hours/is_forfait with contracts table and employee.contract_id';
    }

    public function up(Schema $schema): void
    {
        $this->addSql('CREATE TABLE contracts (id SERIAL NOT NULL, name VARCHAR(120) NOT NULL, tracking_mode VARCHAR(20) NOT NULL, weekly_hours INT DEFAULT NULL, is_active BOOLEAN DEFAULT TRUE NOT NULL, PRIMARY KEY(id))');
        $this->addSql('CREATE INDEX IDX_CONTRACTS_TRACKING_MODE ON contracts (tracking_mode)');

        $this->addSql("INSERT INTO contracts (name, tracking_mode, weekly_hours, is_active) VALUES ('Forfait', 'PRESENCE', NULL, TRUE)");
        $this->addSql("INSERT INTO contracts (name, tracking_mode, weekly_hours, is_active) SELECT DISTINCT CONCAT(contract_hours::text, 'h'), 'TIME', contract_hours, TRUE FROM employees WHERE contract_hours IS NOT NULL");
        $this->addSql("INSERT INTO contracts (name, tracking_mode, weekly_hours, is_active) SELECT '35h', 'TIME', 35, TRUE WHERE NOT EXISTS (SELECT 1 FROM contracts WHERE tracking_mode = 'TIME' AND weekly_hours = 35)");

        $this->addSql('ALTER TABLE employees ADD contract_id INT DEFAULT NULL');
        $this->addSql('CREATE INDEX IDX_EMPLOYEES_CONTRACT ON employees (contract_id)');

        $this->addSql("UPDATE employees e SET contract_id = c.id FROM contracts c WHERE e.is_forfait = TRUE AND c.tracking_mode = 'PRESENCE'");
        $this->addSql("UPDATE employees e SET contract_id = c.id FROM contracts c WHERE e.is_forfait = FALSE AND e.contract_hours IS NOT NULL AND c.tracking_mode = 'TIME' AND c.weekly_hours = e.contract_hours");
        $this->addSql("UPDATE employees e SET contract_id = c.id FROM contracts c WHERE e.contract_id IS NULL AND c.tracking_mode = 'TIME' AND c.weekly_hours = 35");

        $this->addSql('ALTER TABLE employees ALTER COLUMN contract_id SET NOT NULL');
        $this->addSql('ALTER TABLE employees ADD CONSTRAINT FK_EMPLOYEES_CONTRACT FOREIGN KEY (contract_id) REFERENCES contracts (id) NOT DEFERRABLE INITIALLY IMMEDIATE');

        $this->addSql('ALTER TABLE employees DROP COLUMN contract_hours');
        $this->addSql('ALTER TABLE employees DROP COLUMN is_forfait');
    }

    public function down(Schema $schema): void
    {
        $this->addSql('ALTER TABLE employees ADD contract_hours INT DEFAULT NULL');
        $this->addSql('ALTER TABLE employees ADD is_forfait BOOLEAN DEFAULT FALSE NOT NULL');

        $this->addSql("UPDATE employees e SET is_forfait = CASE WHEN c.tracking_mode = 'PRESENCE' THEN TRUE ELSE FALSE END, contract_hours = CASE WHEN c.tracking_mode = 'TIME' THEN c.weekly_hours ELSE NULL END FROM contracts c WHERE e.contract_id = c.id");

        $this->addSql('ALTER TABLE employees DROP CONSTRAINT FK_EMPLOYEES_CONTRACT');
        $this->addSql('DROP INDEX IDX_EMPLOYEES_CONTRACT');
        $this->addSql('ALTER TABLE employees DROP COLUMN contract_id');

        $this->addSql('DROP INDEX IDX_CONTRACTS_TRACKING_MODE');
        $this->addSql('DROP TABLE contracts');
    }
}