/*
 *  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.coyote.http2;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

import org.junit.Assert;
import org.junit.Test;

import org.apache.catalina.connector.Connector;
import org.apache.tomcat.util.http.Method;

/**
 * Unit tests for Section 8.3 of <a href="https://tools.ietf.org/html/rfc9113#section-8.3">RFC 9113</a>.
 */
public class TestHttp2Section_8_3 extends Http2TestBase {

    /*
     * Not explicitly specified in section 8.3 but closely aligned to it.
     */

    @Test
    public void testSchemeInconsistencyNonTLS() throws Exception {
        testSchemeInconsistency(false, false);
    }


    @Test
    public void testSchemeInconsistencyTLS() throws Exception {
        testSchemeInconsistency(true, false);
    }


    @Test
    public void testSchemeInconsistencyNonTLSMismatchAllowed() throws Exception {
        testSchemeInconsistency(false, true);
    }


    @Test
    public void testSchemeInconsistencyTLSMismatchAllowed() throws Exception {
        testSchemeInconsistency(true, true);
    }


    private void testSchemeInconsistency(boolean connectionUsesTls, boolean allowSchemeMismatch) throws Exception {
        // Start HTTP/2 over non-TLS connection
        enableHttp2(connectionUsesTls);
        if (allowSchemeMismatch) {
            Connector connector = getTomcatInstance().getConnector();
            Http2Protocol http2Protocol = (Http2Protocol) connector.findUpgradeProtocols()[0];
            http2Protocol.setAllowSchemeMismatch(allowSchemeMismatch);
        }

        configureAndStartWebApplication();
        openClientConnection(connectionUsesTls);
        doHttpUpgrade();
        sendClientPreface();
        validateHttp2InitialResponse();

        byte[] frameHeader = new byte[9];
        ByteBuffer headersPayload = ByteBuffer.allocate(128);

        List<Header> headers = new ArrayList<>(4);
        headers.add(new Header(":method", Method.GET));
        if (connectionUsesTls) {
            headers.add(new Header(":scheme", "http"));
        } else {
            headers.add(new Header(":scheme", "https"));
        }
        headers.add(new Header(":path", "/simple"));
        headers.add(new Header(":authority", "localhost:" + getPort()));

        buildGetRequest(frameHeader, headersPayload, null, headers, 3);

        writeFrame(frameHeader, headersPayload);

        // Read first response frame
        parser.readFrame();

        if (allowSchemeMismatch) {
            // Normal response. There will be a data frame with the body too.
            parser.readFrame();
            Assert.assertEquals(output.getTrace(), getSimpleResponseTrace(3));
        } else {
            Assert.assertEquals("3-RST-[1]\n", output.getTrace());
        }
    }
}
