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/*
 * Copyright 2018 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @authors tag. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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.hyperfoil.api.config;

import io.hyperfoil.api.http.HttpVersion;
import io.hyperfoil.util.Util;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.function.Consumer;

/**
 * @author Ståle Pedersen
 */
public class HttpBuilder {

    private final BenchmarkBuilder parent;
    private Http http;
    private String baseUrl;
    private boolean allowHttp1x = true;
    private boolean allowHttp2 = true;
    private int sharedConnections = 1;
    private int maxHttp2Streams = 100;
    private int pipeliningLimit = 1;
    private boolean directHttp2 = false;
    private long requestTimeout = 30000;

    public static HttpBuilder forTesting() {
        return new HttpBuilder(null);
    }

    HttpBuilder(BenchmarkBuilder parent) {
        this.parent = parent;
    }

    private HttpBuilder apply(Consumer consumer) {
        consumer.accept(this);
        return this;
    }

    String baseUrl() {
        return baseUrl;
    }

    public HttpBuilder baseUrl(String url) {
        return apply(clone -> clone.baseUrl = Objects.requireNonNull(url));
    }

    public HttpBuilder allowHttp1x(boolean allowHttp1x) {
        this.allowHttp1x = allowHttp1x;
        return this;
    }

    public HttpBuilder allowHttp2(boolean allowHttp2) {
        this.allowHttp2 = allowHttp2;
        return this;
    }

    public BenchmarkBuilder endHttp() {
        return parent;
    }

    public HttpBuilder sharedConnections(int sharedConnections) {
        this.sharedConnections = sharedConnections;
        return this;
    }

    public HttpBuilder maxHttp2Streams(int maxStreams) {
        this.maxHttp2Streams = maxStreams;
        return this;
    }

    public HttpBuilder pipeliningLimit(int limit) {
        this.pipeliningLimit = limit;
        return this;
    }

    public HttpBuilder directHttp2(boolean directHttp2) {
        this.directHttp2 = directHttp2;
        return this;
    }

    public HttpBuilder requestTimeout(long requestTimeout) {
        this.requestTimeout = requestTimeout;
        return this;
    }

    public HttpBuilder requestTimeout(String requestTimeout) {
        if ("none".equals(requestTimeout)) {
            this.requestTimeout = -1;
        } else {
            this.requestTimeout = Util.parseToMillis(requestTimeout);
        }
        return this;
    }

    public long requestTimeout() {
        return requestTimeout;
    }

    public void prepareBuild() {
    }

    public Http build(boolean isDefault) {
        if (http != null) {
            if (isDefault != http.isDefault()) {
                throw new IllegalArgumentException("Already built as isDefault=" + http.isDefault());
            }
            return http;
        }
        List httpVersions = new ArrayList<>();
        // The order is important here because it will be provided to the ALPN
        if (allowHttp2) {
            httpVersions.add(HttpVersion.HTTP_2_0);
        }
        if (allowHttp1x) {
            httpVersions.add(HttpVersion.HTTP_1_1);
            httpVersions.add(HttpVersion.HTTP_1_0);
        }
        if (directHttp2) {
            throw new UnsupportedOperationException("Direct HTTP/2 not implemented");
        }
        return http = new Http(isDefault, baseUrl, httpVersions.toArray(new HttpVersion[0]), maxHttp2Streams, pipeliningLimit, sharedConnections, directHttp2, requestTimeout);
    }
}