package kr.re.etri.autoflow.controllers;

import com.fasterxml.jackson.databind.ObjectMapper;
import kr.re.etri.autoflow.entity.ProjectEntity;
import kr.re.etri.autoflow.payload.request.ProjectRequest;
import kr.re.etri.autoflow.service.ProjectService;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.context.TestConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Import;
import org.springframework.http.MediaType;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityCustomizer;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.test.web.servlet.MockMvc;

import java.time.LocalDate;
import java.util.List;
import java.util.Optional;

import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.when;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;

import org.springframework.beans.factory.annotation.Autowired;

@WebMvcTest(ProjectController.class)
@Import(ProjectControllerTest.MockConfig.class)
class ProjectControllerTest {

    @Autowired
    private MockMvc mockMvc;

    @Autowired
    private ProjectService projectService;

    @Autowired
    private ObjectMapper objectMapper;

    @TestConfiguration
    static class MockConfig {

        @Bean
        public ProjectService projectService() {
            return Mockito.mock(ProjectService.class);
        }

        // 테스트 시 Security 완전 무시
        @Bean
        public SecurityFilterChain testSecurityFilterChain(HttpSecurity http) throws Exception {
            http
                    .authorizeHttpRequests(authz -> authz.anyRequest().permitAll())
                    .csrf(csrf -> csrf.disable());
            return http.build();
        }
    }


    private ProjectEntity sampleProject(Long id, String code, String name) {
        return ProjectEntity.builder()
                .id(id)
                .prjCd(code)
                .prjNm(name)
                .prjStartDt(LocalDate.of(2025, 8, 1))
                .prjEndDt(LocalDate.of(2025, 12, 31))
                .build();
    }

    @Test
    @DisplayName("모든 프로젝트 조회")
    void getAllProjects() throws Exception {
        ProjectEntity entity = sampleProject(1L, "PRJ001", "AI 프로젝트");
        when(projectService.findAll()).thenReturn(List.of(entity));

        mockMvc.perform(get("/api/projects"))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$[0].prjCd").value("PRJ001"));
    }

    @Nested
    class GetProjectByIdTests {
        @Test
        @DisplayName("ID로 프로젝트 조회 - 성공")
        void success() throws Exception {
            ProjectEntity entity = sampleProject(1L, "PRJ001", "AI 프로젝트");
            when(projectService.findById(1L)).thenReturn(Optional.of(entity));

            mockMvc.perform(get("/api/projects/1"))
                    .andExpect(status().isOk())
                    .andExpect(jsonPath("$.prjCd").value("PRJ001"));
        }

        @Test
        @DisplayName("ID로 프로젝트 조회 - 실패")
        void notFound() throws Exception {
            when(projectService.findById(999L)).thenReturn(Optional.empty());

            mockMvc.perform(get("/api/projects/999"))
                    .andExpect(status().isNotFound());
        }
    }

    @Nested
    class CreateProjectTests {
        @Test
        @DisplayName("프로젝트 생성 - 성공")
        void success() throws Exception {
            ProjectEntity input = sampleProject(null, "PRJ002", "새 프로젝트");
            when(projectService.create(any())).thenReturn(input);

            mockMvc.perform(post("/api/projects")
                            .contentType(MediaType.APPLICATION_JSON)
                            .content(objectMapper.writeValueAsString(input)))
                    .andExpect(status().isOk())
                    .andExpect(jsonPath("$.prjCd").value("PRJ002"));
        }

        @Test
        @DisplayName("프로젝트 생성 - 실패(중복 등)")
        void failure() throws Exception {
            ProjectEntity input = ProjectEntity.builder().prjCd("PRJ_DUP").build();
            when(projectService.create(any())).thenThrow(new IllegalArgumentException("중복된 프로젝트 코드입니다."));

            mockMvc.perform(post("/api/projects")
                            .contentType(MediaType.APPLICATION_JSON)
                            .content(objectMapper.writeValueAsString(input)))
                    .andExpect(status().isBadRequest())
                    .andExpect(content().string("중복된 프로젝트 코드입니다."));
        }
    }

    @Nested
    class UpdateProjectTests {
        @Test
        @DisplayName("프로젝트 수정 - 성공")
        void success() throws Exception {
            ProjectRequest request = new ProjectRequest();
            request.setPrjNm("수정된 이름");

            ProjectEntity updated = sampleProject(1L, "PRJ001", "수정된 이름");
            when(projectService.update(Mockito.eq(1L), any())).thenReturn(Optional.of(updated));

            mockMvc.perform(put("/api/projects/1")
                            .contentType(MediaType.APPLICATION_JSON)
                            .content(objectMapper.writeValueAsString(request)))
                    .andExpect(status().isOk())
                    .andExpect(jsonPath("$.prjNm").value("수정된 이름"));
        }

        @Test
        @DisplayName("프로젝트 수정 - 실패")
        void notFound() throws Exception {
            ProjectRequest request = new ProjectRequest();
            request.setPrjNm("수정된 이름");

            when(projectService.update(Mockito.eq(999L), any())).thenReturn(Optional.empty());

            mockMvc.perform(put("/api/projects/999")
                            .contentType(MediaType.APPLICATION_JSON)
                            .content(objectMapper.writeValueAsString(request)))
                    .andExpect(status().isNotFound());
        }
    }

    @Nested
    class DeleteProjectTests {
        @Test
        @DisplayName("프로젝트 삭제 - 성공")
        void success() throws Exception {
            when(projectService.delete(1L)).thenReturn(true);

            mockMvc.perform(delete("/api/projects/1"))
                    .andExpect(status().isNoContent());
        }

        @Test
        @DisplayName("프로젝트 삭제 - 실패")
        void notFound() throws Exception {
            when(projectService.delete(999L)).thenReturn(false);

            mockMvc.perform(delete("/api/projects/999"))
                    .andExpect(status().isNotFound());
        }
    }
}