/*
 * Copyright 2018-2022 adorsys GmbH & Co KG
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Affero General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or (at
 * your option) any later version. This program is distributed in the hope that
 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see https://www.gnu.org/licenses/.
 *
 * This project is also available under a separate commercial license. You can
 * contact us at psd2@adorsys.com.
 */

package de.adorsys.xs2a.adapter.remote.mapper;

import de.adorsys.xs2a.adapter.api.ResponseHeaders;
import org.mapstruct.Mapper;
import org.springframework.http.HttpHeaders;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

@Mapper
public interface ResponseHeadersMapper {

    default ResponseHeaders getHeaders(HttpHeaders httpHeaders) {
        Set<Map.Entry<String, List<String>>> entrySet = httpHeaders.entrySet();
        Map<String, String> headers = new HashMap<>(entrySet.size());
        for (Map.Entry<String, List<String>> entry : entrySet) {
            List<String> value = entry.getValue();
            if (value != null && !value.isEmpty()) {
                headers.put(entry.getKey(), value.get(0));
            }
        }
        return ResponseHeaders.fromMap(headers);
    }
}
