/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package org.apache.camel.component.http;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.camel.Converter;
import org.apache.camel.Exchange;
import org.apache.camel.util.ExchangeHelper;
import org.apache.camel.util.GZIPHelper;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.RequestEntity;

/**
 * Some converter methods to make it easier to convert the body to RequestEntity types.
 */
@Converter
public final class RequestEntityConverter {

    private RequestEntityConverter() {
    }

    @Converter
    public static RequestEntity toRequestEntity(byte[] data, Exchange exchange) throws Exception {
        return asRequestEntity(data, exchange);
    }

    @Converter
    public static RequestEntity toRequestEntity(InputStream inStream, Exchange exchange) throws Exception {
        return asRequestEntity(inStream, exchange);
    }

    @Converter
    public static RequestEntity toRequestEntity(String str, Exchange exchange) throws Exception {
        if (exchange != null && GZIPHelper.isGzip(exchange.getIn())) {
            byte[] data = exchange.getContext().getTypeConverter().convertTo(byte[].class, str);
            return asRequestEntity(data, exchange);
        } else {
            // will use the default StringRequestEntity
            return null;
        }
    }

    private static RequestEntity asRequestEntity(InputStream in, Exchange exchange) throws IOException {
        if (exchange != null
            && !exchange.getProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.FALSE, Boolean.class)) {
            return new InputStreamRequestEntity(GZIPHelper.compressGzip(exchange.getIn()
                .getHeader(Exchange.CONTENT_ENCODING, String.class), in), ExchangeHelper
                .getContentType(exchange));
        } else {
            // should set the content type here
            if (exchange != null) {
                return new InputStreamRequestEntity(in, ExchangeHelper.getContentType(exchange));
            } else {
                return new InputStreamRequestEntity(in);
            }
        }
    }

    private static RequestEntity asRequestEntity(byte[] data, Exchange exchange) throws Exception {
        if (exchange != null
            && !exchange.getProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.FALSE, Boolean.class)) {
            return new InputStreamRequestEntity(GZIPHelper.compressGzip(exchange.getIn()
                .getHeader(Exchange.CONTENT_ENCODING, String.class), data), ExchangeHelper
                .getContentType(exchange));
        } else {
            // should set the content type here
            if (exchange != null) {
                return new InputStreamRequestEntity(new ByteArrayInputStream(data), ExchangeHelper.getContentType(exchange));
            } else {
                return new InputStreamRequestEntity(new ByteArrayInputStream(data));
            }
        }
    }
}