@Data
@EqualsAndHashCode(callSuper = false)
@Schema(
    description = "Base test DTO extending RepresentationModel",
    subTypes = { ExtendedTestDto.class }
)
public class TestDto extends RepresentationModel<TestDto> {
    
    @Schema(description = "ID field")
    private Long id;
    
    @Schema(description = "Name field")
    private String name;
    
    // _links is automatically provided by RepresentationModel
}

@Data
@EqualsAndHashCode(callSuper = true)
@Schema(
    description = "Extended test DTO",
    allOf = { TestDto.class }  // ← Inherits via allOf
)
public class ExtendedTestDto extends TestDto {
    
    @Schema(description = "Additional field specific to ExtendedTestDto")
    private String otherField;
    
    // _links should be inherited from TestDto (parent)
    // Bug: _links incorrectly appears here as duplicate!
}

@RestController
@Tag(name = "Test", description = "Test API for reproducing springdoc-openapi issue #3161")
public class TestController {

    @GetMapping("/hello")
    @Operation(
        summary = "Get ExtendedTestDto",
        description = "Returns an ExtendedTestDto to demonstrate _links duplication bug"
    )
    public ExtendedTestDto hello() {
        ExtendedTestDto dto = new ExtendedTestDto();
        dto.setId(1L);
        dto.setName("Test");
        dto.setOtherField("Additional Data");
        
        // Add HATEOAS link
        Link selfLink = linkTo(methodOn(TestController.class).hello()).withSelfRel();
        dto.add(selfLink);
        
        return dto;
    }
}

@SpringBootTest(classes = SpringdocIssue3161ReproductionApplication.class)
@AutoConfigureMockMvc
public class SimpleBugReproductionTest {

    @Autowired
    private MockMvc mockMvc;

    @Autowired
    private ObjectMapper objectMapper;

    @Test
    public void reproduceBugWithMockMvc() throws Exception {
        // Get OpenAPI spec
        MvcResult result = mockMvc.perform(get("/v3/api-docs"))
                .andExpect(status().isOk())
                .andReturn();
        
        String openApiJson = result.getResponse().getContentAsString();
        JsonNode rootNode = objectMapper.readTree(openApiJson);
        
        // Check ExtendedTestDto schema
        JsonNode extendedTestDto = rootNode
            .path("components")
            .path("schemas")
            .path("ExtendedTestDto");
        
        // Bug check: ExtendedTestDto should NOT have duplicate _links
        boolean hasAllOf = extendedTestDto.has("allOf");
        boolean hasOwnLinks = extendedTestDto.path("properties").has("_links");
        
        // Assertion: _links should NOT exist (inherited from TestDto)
        assertThat(hasOwnLinks)
            .as("ExtendedTestDto should NOT have own _links property")
            .isFalse();
    }
}