/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Modifications Copyright (c) 2019 Samsung
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.onap.so.cloudify.connector.http;

import org.apache.http.Header;
import org.apache.http.HttpResponse;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.onap.so.cloudify.base.client.CloudifyResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

public class HttpClientResponse implements CloudifyResponse {

    private static Logger logger = LoggerFactory.getLogger(HttpClientResponse.class);

    private HttpResponse response = null;
    private String entityBody = null;

    public HttpClientResponse(HttpResponse response) {
        this.response = response;

        // Read the body so InputStream can be closed
        if (response.getEntity() == null) {
            // No body
            logger.debug("No Response Body");
            return;
        }

        ByteArrayOutputStream responseBody = new ByteArrayOutputStream();
        try {
            response.getEntity().writeTo(responseBody);
        } catch (IOException e) {
            throw new HttpClientException("Error Reading Response Body", e);
        }
        entityBody = responseBody.toString();
        logger.debug(entityBody);
    }


    @Override
    public <T> T getEntity(Class<T> returnType) {
        // Get appropriate mapper, based on existence of a root element
        ObjectMapper mapper = HttpClientConnector.getObjectMapper(returnType);

        T resp = null;
        try {
            resp = mapper.readValue(entityBody, returnType);
        } catch (Exception e) {
            throw new HttpClientException("Caught exception in getEntity", e);
        }
        return resp;
    }

    @Override
    public <T> T getErrorEntity(Class<T> returnType) {
        return getEntity(returnType);
    }

    @Override
    public InputStream getInputStream() {
        return new ByteArrayInputStream(entityBody.getBytes());
    }

    @Override
    public String getHeader(String name) {
        return response.getFirstHeader(name).getValue();
    }

    @Override
    public Map<String, String> headers() {
        Map<String, String> headers = new HashMap<>();

        Header responseHeaders[] = response.getAllHeaders();
        for (Header h : responseHeaders) {
            headers.put(h.getName(), h.getValue());
        }

        return headers;
    }

}