/*
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    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  
  package org.apache.hc.client5.http.protocol;
  
  
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.mockito.Answers.RETURNS_DEEP_STUBS;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  import org.apache.hc.core5.http.EntityDetails;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HttpHeaders;
  import org.apache.hc.core5.http.HttpRequest;
  import org.apache.hc.core5.http.ProtocolException;
  import org.apache.hc.core5.http.protocol.HttpContext;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  
  class TestRequestIfRange {
      @Mock
      private HttpRequest request;
  
      @Mock
      private EntityDetails entity;
  
      @Mock
      private HttpContext context;
  
      private RequestIfRange requestIfRange;
  
      @BeforeEach
      void setUp() {
          MockitoAnnotations.openMocks(this);
          requestIfRange = new RequestIfRange();
      }
  
      @Test
      void testNoIfRangeHeader() throws Exception {
          when(request.getFirstHeader(HttpHeaders.IF_RANGE)).thenReturn(null);
          requestIfRange.process(request, entity, context);
          // No exception should be thrown
      }
  
      @Test
      void testIfRangeWithoutRangeHeader() {
          when(request.getFirstHeader(HttpHeaders.IF_RANGE)).thenReturn(mock(Header.class));
          when(request.containsHeader(HttpHeaders.RANGE)).thenReturn(false);
  
          assertThrows(ProtocolException.class, () -> requestIfRange.process(request, entity, context));
      }
  
      @Test
      void testWeakETagInIfRange() {
          when(request.getFirstHeader(HttpHeaders.IF_RANGE)).thenReturn(mock(Header.class));
          when(request.containsHeader(HttpHeaders.RANGE)).thenReturn(true);
          when(request.getFirstHeader(HttpHeaders.ETAG)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
          when(request.getFirstHeader(HttpHeaders.ETAG).getValue()).thenReturn("W/\"weak-etag\"");
  
          assertThrows(ProtocolException.class, () -> requestIfRange.process(request, entity, context));
      }
  
  
      @Test
      void testDateHeaderWithStrongValidator() throws Exception {
          when(request.getFirstHeader(HttpHeaders.IF_RANGE)).thenReturn(mock(Header.class));
          when(request.containsHeader(HttpHeaders.RANGE)).thenReturn(true);
          when(request.getFirstHeader(HttpHeaders.DATE)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
          when(request.getFirstHeader(HttpHeaders.DATE).getValue()).thenReturn("Tue, 15 Nov 2022 08:12:31 GMT");
          when(request.getFirstHeader(HttpHeaders.LAST_MODIFIED)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
          when(request.getFirstHeader(HttpHeaders.LAST_MODIFIED).getValue()).thenReturn("Tue, 15 Nov 2022 08:12:30 GMT");
 
         requestIfRange.process(request, entity, context);
         // No exception should be thrown
     }
 
     @Test
     void testSmallDifferenceWithETagPresent() {
         when(request.getFirstHeader(HttpHeaders.IF_RANGE)).thenReturn(mock(Header.class));
         when(request.containsHeader(HttpHeaders.RANGE)).thenReturn(true);
         when(request.getFirstHeader(HttpHeaders.DATE)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
         when(request.getFirstHeader(HttpHeaders.DATE).getValue()).thenReturn("Tue, 15 Nov 2022 08:12:30 GMT"); // Same as Last-Modified
         when(request.getFirstHeader(HttpHeaders.LAST_MODIFIED)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
         when(request.getFirstHeader(HttpHeaders.LAST_MODIFIED).getValue()).thenReturn("Tue, 15 Nov 2022 08:12:30 GMT");
         final Header mockETagHeader = mock(Header.class);
         when(mockETagHeader.getValue()).thenReturn("\"some-value\""); // Mocking a weak ETag value
         when(request.getFirstHeader(HttpHeaders.ETAG)).thenReturn(mockETagHeader);
 
         assertThrows(ProtocolException.class, () -> requestIfRange.process(request, entity, context));
     }
 
     @Test
     void testSmallDifferenceWithETagAbsent() throws Exception {
         when(request.getFirstHeader(HttpHeaders.IF_RANGE)).thenReturn(mock(Header.class));
         when(request.containsHeader(HttpHeaders.RANGE)).thenReturn(true);
         when(request.getFirstHeader(HttpHeaders.DATE)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
         when(request.getFirstHeader(HttpHeaders.DATE).getValue()).thenReturn("Tue, 15 Nov 2022 08:12:31 GMT");
         when(request.getFirstHeader(HttpHeaders.LAST_MODIFIED)).thenReturn(mock(Header.class, RETURNS_DEEP_STUBS));
         when(request.getFirstHeader(HttpHeaders.LAST_MODIFIED).getValue()).thenReturn("Tue, 15 Nov 2022 08:12:30 GMT");
         when(request.getFirstHeader(HttpHeaders.ETAG)).thenReturn(null);
 
         requestIfRange.process(request, entity, context);
         // No exception should be thrown
     }
 
 }