/*
 * 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.servicecomb.common.accessLog.core.element.impl;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.when;

import java.util.HashMap;
import java.util.Map;

import org.apache.servicecomb.common.rest.RestConst;
import org.apache.servicecomb.common.rest.codec.param.RestClientRequestImpl;
import org.apache.servicecomb.core.Invocation;
import org.apache.servicecomb.core.event.InvocationFinishEvent;
import org.apache.servicecomb.core.event.ServerAccessLogEvent;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mockito;

import io.vertx.core.MultiMap;
import io.vertx.core.http.HttpClientRequest;
import io.vertx.core.http.HttpServerRequest;
import io.vertx.core.http.impl.headers.VertxHttpHeaders;
import io.vertx.ext.web.RoutingContext;

public class RequestHeaderItemTest {
  private static final String VAR_NAME = "varName";

  private static final RequestHeaderAccessItem ELEMENT = new RequestHeaderAccessItem(VAR_NAME);

  private StringBuilder strBuilder;

  private InvocationFinishEvent finishEvent;

  private ServerAccessLogEvent accessLogEvent;

  private RoutingContext routingContext;

  private Invocation invocation;

  private RestClientRequestImpl restClientRequest;

  private HttpServerRequest serverRequest;

  private HttpClientRequest clientRequest;

  private MultiMap headers;

  @Before
  public void initStrBuilder() {
    routingContext = Mockito.mock(RoutingContext.class);
    finishEvent = Mockito.mock(InvocationFinishEvent.class);
    invocation = Mockito.mock(Invocation.class);
    serverRequest = Mockito.mock(HttpServerRequest.class);
    restClientRequest = Mockito.mock(RestClientRequestImpl.class);
    clientRequest = Mockito.mock(HttpClientRequest.class);
    headers = Mockito.mock(MultiMap.class);

    accessLogEvent = new ServerAccessLogEvent();
    accessLogEvent.setRoutingContext(routingContext);
    strBuilder = new StringBuilder();
  }

  @Test
  public void serverFormattedElement() {
    VertxHttpHeaders headers = new VertxHttpHeaders();
    String testValue = "testValue";
    headers.add(VAR_NAME, testValue);
    when(routingContext.request()).thenReturn(serverRequest);
    when(serverRequest.headers()).thenReturn(headers);

    ELEMENT.appendServerFormattedItem(accessLogEvent, strBuilder);
    assertEquals(testValue, strBuilder.toString());
    assertEquals(ELEMENT.getVarName(), VAR_NAME);
  }

  @Test
  public void clientFormattedElement() {
    Map<String, Object> handlerContext = new HashMap<>();
    String testValue = "testValue";

    handlerContext.put(RestConst.INVOCATION_HANDLER_REQUESTCLIENT, restClientRequest);
    when(finishEvent.getInvocation()).thenReturn(invocation);
    when(invocation.getHandlerContext()).thenReturn(handlerContext);
    when(restClientRequest.getRequest()).thenReturn(clientRequest);
    when(clientRequest.headers()).thenReturn(headers);
    when(headers.get(VAR_NAME)).thenReturn(testValue);

    ELEMENT.appendClientFormattedItem(finishEvent, strBuilder);
    assertEquals(testValue, strBuilder.toString());
  }

  @Test
  public void serverFormattedElementIfHeaderIsNull() {
    when(routingContext.request()).thenReturn(serverRequest);
    when(serverRequest.headers()).thenReturn(null);

    ELEMENT.appendServerFormattedItem(accessLogEvent, strBuilder);
    assertEquals("-", strBuilder.toString());
  }

  @Test
  public void clientFormattedElementIfHeaderIsNull() {
    Map<String, Object> handlerContext = new HashMap<>();
    handlerContext.put(RestConst.INVOCATION_HANDLER_REQUESTCLIENT, restClientRequest);
    when(finishEvent.getInvocation()).thenReturn(invocation);
    when(invocation.getHandlerContext()).thenReturn(handlerContext);
    when(restClientRequest.getRequest()).thenReturn(clientRequest);
    when(clientRequest.headers()).thenReturn(null);

    ELEMENT.appendClientFormattedItem(finishEvent, strBuilder);
    assertEquals("-", strBuilder.toString());
  }

  @Test
  public void serverFormattedElementIfNotFound() {
    VertxHttpHeaders headers = new VertxHttpHeaders();
    String testValue = "testValue";
    headers.add("anotherKey", testValue);
    when(routingContext.request()).thenReturn(serverRequest);
    when(serverRequest.headers()).thenReturn(headers);

    ELEMENT.appendServerFormattedItem(accessLogEvent, strBuilder);
    assertEquals("-", strBuilder.toString());
  }
}
