<?php

declare(strict_types=1);

namespace Doctrine\DBAL\Tests\Functional;

use Doctrine\DBAL\Exception\InvalidColumnIndex;
use Doctrine\DBAL\Schema\Table;
use Doctrine\DBAL\Tests\FunctionalTestCase;

use function strtolower;

class ResultMetadataTest extends FunctionalTestCase
{
    protected function setUp(): void
    {
        $table = new Table('result_metadata_table');
        $table->addColumn('test_int', 'integer');
        $table->setPrimaryKey(['test_int']);

        $this->dropAndCreateTable($table);

        $this->connection->insert('result_metadata_table', ['test_int' => 1]);
    }

    public function testColumnNameWithResults(): void
    {
        $sql = 'SELECT test_int, test_int AS alternate_name FROM result_metadata_table';

        $result = $this->connection->executeQuery($sql);

        self::assertEquals(2, $result->columnCount());
        // Depending on the platform, field names might have different case than in the SQL
        // query (for instance, Oracle turns unquoted identifiers into upper case).
        self::assertEquals('test_int', strtolower($result->getColumnName(0)));
        self::assertEquals('alternate_name', strtolower($result->getColumnName(1)));
    }

    public function testColumnNameWithInvalidIndex(): void
    {
        $sql = 'SELECT test_int, test_int AS alternate_name FROM result_metadata_table';

        $result = $this->connection->executeQuery($sql);

        // Consume the result set to avoid issues with unprocessed buffer between tests
        $result->fetchAllAssociative();

        $this->expectException(InvalidColumnIndex::class);

        $result->getColumnName(2);
    }

    public function testColumnNameWithoutResults(): void
    {
        $sql = 'SELECT test_int, test_int AS alternate_name FROM result_metadata_table WHERE 1 = 0';

        $result = $this->connection->executeQuery($sql);

        self::assertEquals(2, $result->columnCount());
        self::assertEquals('test_int', strtolower($result->getColumnName(0)));
        self::assertEquals('alternate_name', strtolower($result->getColumnName(1)));
    }
}
