<?php

declare(strict_types=1);

namespace OCA\WorkflowDeckAutomation\Migration;

use Closure;
use OCP\DB\ISchemaWrapper;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\DB\Types;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;

/**
 * Replaces the yes/no `notify_email` flag with `notify_mode`
 * (off / owner / board, see NotificationPolicy::MODES).
 *
 * Existing workflows keep behaving exactly as before: a set flag becomes
 * `owner` — the only recipient the flag ever had — everything else `off`.
 * The old column is dropped by the next step, once the values are copied.
 */
class Version1002Date20261001120000 extends SimpleMigrationStep {
	public function __construct(
		private IDBConnection $db,
	) {
	}

	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();

		if (!$schema->hasTable('wfda_workflows')) {
			return null;
		}

		$table = $schema->getTable('wfda_workflows');
		if ($table->hasColumn('notify_mode')) {
			return null;
		}

		$table->addColumn('notify_mode', Types::STRING, [
			'notnull' => true,
			'length' => 16,
			'default' => 'off',
		]);

		return $schema;
	}

	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();
		if (!$schema->hasTable('wfda_workflows') || !$schema->getTable('wfda_workflows')->hasColumn('notify_email')) {
			return;
		}

		$qb = $this->db->getQueryBuilder();
		$qb->update('wfda_workflows')
			->set('notify_mode', $qb->createNamedParameter('owner'))
			->where($qb->expr()->eq('notify_email', $qb->createNamedParameter(true, IQueryBuilder::PARAM_BOOL)));
		$qb->executeStatement();
	}
}