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/*
 * Copyright (c) 2017-2021 the original author or authors.
 *
 * 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 org.eclipse.jetty.reactive.client.internal;

import java.nio.ByteBuffer;
import java.util.function.LongConsumer;
import org.eclipse.jetty.client.api.Response;
import org.eclipse.jetty.client.api.Result;
import org.eclipse.jetty.http.HttpField;
import org.eclipse.jetty.reactive.client.ReactiveRequest;
import org.eclipse.jetty.reactive.client.ReactiveResponse;
import org.eclipse.jetty.util.Callback;

public class ResponseEventPublisher extends AbstractEventPublisher implements Response.Listener {
    private final ReactiveRequest request;

    public ResponseEventPublisher(ReactiveRequest request) {
        this.request = request;
    }

    @Override
    public void onBegin(Response response) {
        emit(new ReactiveResponse.Event(ReactiveResponse.Event.Type.BEGIN, request.getReactiveResponse()));
    }

    @Override
    public boolean onHeader(Response response, HttpField field) {
        return true;
    }

    @Override
    public void onHeaders(Response response) {
        emit(new ReactiveResponse.Event(ReactiveResponse.Event.Type.HEADERS, request.getReactiveResponse()));
    }

    @Override
    public void onContent(Response response, ByteBuffer content) {
    }

    @Override
    public void onContent(Response response, ByteBuffer content, Callback callback) {
    }

    @Override
    public void onContent(Response response, LongConsumer demand, ByteBuffer content, Callback callback) {
        emit(new ReactiveResponse.Event(ReactiveResponse.Event.Type.CONTENT, request.getReactiveResponse(), content));
        callback.succeeded();
        demand.accept(1);
    }

    @Override
    public void onSuccess(Response response) {
        emit(new ReactiveResponse.Event(ReactiveResponse.Event.Type.SUCCESS, request.getReactiveResponse()));
    }

    @Override
    public void onFailure(Response response, Throwable failure) {
        emit(new ReactiveResponse.Event(ReactiveResponse.Event.Type.FAILURE, request.getReactiveResponse(), failure));
    }

    @Override
    public void onComplete(Result result) {
        emit(new ReactiveResponse.Event(ReactiveResponse.Event.Type.COMPLETE, request.getReactiveResponse()));
        if (result.isSucceeded()) {
            succeed();
        } else {
            fail(result.getFailure());
        }
    }
}