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   *  Licensed to the Apache Software Foundation (ASF) under one
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   *  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.causeway.security.spring.authconverters;
  
  import java.net.MalformedURLException;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.Map;
  
  import org.assertj.core.api.Assertions;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Nested;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.mockito.Mock;
  import org.mockito.Mockito;
  import org.mockito.junit.jupiter.MockitoExtension;
  
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.GrantedAuthority;
  import org.springframework.security.oauth2.core.user.OAuth2User;
  
  import org.apache.causeway.extensions.spring.security.oauth2.authconverters.AuthenticationConverterOfOAuth2UserPrincipal;
  
  @ExtendWith(MockitoExtension.class)
  class AuthenticationConverterOfOAuth2UserPrincipal_Test {
  
      @Mock Authentication mockAuthentication;
  
      AuthenticationConverterOfOAuth2UserPrincipal converter;
  
      @BeforeEach
      void before() {
          converter = new AuthenticationConverterOfOAuth2UserPrincipal();
      }
  
      @Nested
      class userNameFrom {
  
          @Test
          void given_login_attr_exists_then_used() {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.singletonMap("login", "freddy");
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.name()).isEqualTo("freddy");
          }
  
          @Test
          void given_no_login_attr_exists_then_name_instead_is_used() {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.emptyMap();
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.name()).isEqualTo("fred");
          }
      }
  
      @Nested
      class avatarUrl {
  
          @Test
          void given_avatarUrl_attr_exists_and_can_be_parsed_then_used() throws MalformedURLException {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.singletonMap("avatar_url", "https://upload.wikimedia.org/wikipedia/en/a/ad/Fred_Flintstone.png");
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.avatarUrl()).isEqualTo(new java.net.URL("https://upload.wikimedia.org/wikipedia/en/a/ad/Fred_Flintstone.png"));
          }
  
          @Test
          void given_avatarUrl_attr_exists_but_cannot_be_parsed_then_not_used() throws MalformedURLException {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.singletonMap("avatar_url", "GARBAGE://upload.wikimedia.org/wikipedia/en/a/ad/Fred_Flintstone.png");
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.avatarUrl()).isNull();
          }
  
          @Test
          void given_avatarUrl_attr_does_not_exists_then_none() throws MalformedURLException {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.emptyMap();
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.avatarUrl()).isNull();
          }
  
      }
  
      @Nested
      class realName {
  
          @Test
          void given_name_attr_exists_then_used() throws MalformedURLException {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.singletonMap("name", "Fred Flintstone");
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.realName()).isEqualTo("Fred Flintstone");
          }
  
          @Test
          void given_name_attr_does_not_exists_then_none() throws MalformedURLException {
  
              // given
              final OAuth2User oAuth2User = new OAuth2User() {
                  @Override public String getName() { return "fred"; }
                  @Override public Map<String, Object> getAttributes() {
                      return Collections.emptyMap();
                  }
                  @Override public Collection<? extends GrantedAuthority> getAuthorities() {
                      return Collections.emptyList();
                  }
              };
  
              // expect
              Mockito.when(mockAuthentication.getPrincipal()).thenReturn(oAuth2User);
  
              // when
              var userMemento = converter.convert(mockAuthentication);
  
              // then
              Assertions.assertThat(userMemento).isNotNull();
              Assertions.assertThat(userMemento.realName()).isNull();
          }
  
      }
  }
  