/**
 * Swagger Petstore  ' \" =end
 * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\   ' \" =end
 *
 * OpenAPI spec version: 1.0.0  ' \" =end
 * Contact: apiteam@swagger.io  ' \" =end
 *
 * NOTE: This class is auto generated by the swagger code generator program.
 * https://github.com/swagger-api/swagger-codegen.git
 * Do not edit the class manually.
 *
 * 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.
 */


package io.swagger.client;

import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.RequestBody;

import java.io.IOException;

import okio.Buffer;
import okio.BufferedSink;
import okio.ForwardingSink;
import okio.Okio;
import okio.Sink;

public class ProgressRequestBody extends RequestBody {

    public interface ProgressRequestListener {
        void onRequestProgress(long bytesWritten, long contentLength, boolean done);
    }

    private final RequestBody requestBody;

    private final ProgressRequestListener progressListener;

    private BufferedSink bufferedSink;

    public ProgressRequestBody(RequestBody requestBody, ProgressRequestListener progressListener) {
        this.requestBody = requestBody;
        this.progressListener = progressListener;
    }

    @Override
    public MediaType contentType() {
        return requestBody.contentType();
    }

    @Override
    public long contentLength() throws IOException {
        return requestBody.contentLength();
    }

    @Override
    public void writeTo(BufferedSink sink) throws IOException {
        if (bufferedSink == null) {
            bufferedSink = Okio.buffer(sink(sink));
        }

        requestBody.writeTo(bufferedSink);
        bufferedSink.flush();

    }

    private Sink sink(Sink sink) {
        return new ForwardingSink(sink) {

            long bytesWritten = 0L;
            long contentLength = 0L;

            @Override
            public void write(Buffer source, long byteCount) throws IOException {
                super.write(source, byteCount);
                if (contentLength == 0) {
                    contentLength = contentLength();
                }

                bytesWritten += byteCount;
                progressListener.onRequestProgress(bytesWritten, contentLength, bytesWritten == contentLength);
            }
        };
    }
}
