<?php

namespace BeyondSEODeps\Doctrine\DBAL\Platforms\SQLServer;

use BeyondSEODeps\Doctrine\DBAL\Platforms\SQLServerPlatform;
use BeyondSEODeps\Doctrine\DBAL\Schema\Comparator as BaseComparator;
use BeyondSEODeps\Doctrine\DBAL\Schema\Table;
use BeyondSEODeps\Doctrine\DBAL\Schema\TableDiff;
/**
 * Compares schemas in the context of SQL Server platform.
 *
 * @link \https://docs.microsoft.com/en-us/sql/t-sql/statements/collations?view=sql-server-ver15
 */
class Comparator extends BaseComparator
{
    private string $databaseCollation;
    /** @internal The comparator can be only instantiated by a schema manager. */
    public function __construct(SQLServerPlatform $platform, string $databaseCollation)
    {
        parent::__construct($platform);
        $this->databaseCollation = $databaseCollation;
    }
    public function compareTables(Table $fromTable, Table $toTable): TableDiff
    {
        return parent::compareTables($this->normalizeColumns($fromTable), $this->normalizeColumns($toTable));
    }
    /**
     * {@inheritDoc}
     */
    public function diffTable(Table $fromTable, Table $toTable)
    {
        return parent::diffTable($this->normalizeColumns($fromTable), $this->normalizeColumns($toTable));
    }
    private function normalizeColumns(Table $table): Table
    {
        $table = clone $table;
        foreach ($table->getColumns() as $column) {
            $options = $column->getPlatformOptions();
            if (!isset($options['collation']) || $options['collation'] !== $this->databaseCollation) {
                continue;
            }
            unset($options['collation']);
            $column->setPlatformOptions($options);
        }
        return $table;
    }
}