package com.mydreamjob.application;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.mydreamjob.application.dto.CandidateDetailView;
import com.mydreamjob.application.dto.CandidateItemView;
import com.mydreamjob.application.dto.CandidateListResponse;
import com.mydreamjob.auth.User;
import com.mydreamjob.auth.User.Role;
import com.mydreamjob.auth.UserRepository;
import com.mydreamjob.common.exception.BusinessException;
import com.mydreamjob.common.exception.ErrorCode;
import com.mydreamjob.company.Company;
import com.mydreamjob.company.CompanyService;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.http.MediaType;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.web.servlet.MockMvc;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;

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

@SpringBootTest
@AutoConfigureMockMvc
@ActiveProfiles("integration-test")
class ApplicationControllerTest {

    @Autowired private MockMvc mockMvc;
    @Autowired private com.mydreamjob.auth.JwtTokenProvider jwtTokenProvider;
    @MockBean private ApplicationService applicationService;
    @MockBean private CompanyService companyService;
    @MockBean private UserRepository userRepository;
    @MockBean private RedisTemplate<String, Object> redisTemplate;
    private final ObjectMapper mapper = new ObjectMapper();

    private static final Long COMPANY_USER_ID = 10L;
    private static final Long STUDENT_USER_ID = 20L;
    private static final Long ADMIN_USER_ID = 30L;
    private static final Long COMPANY_ID = 1L;
    private static final Long JOB_ID = 50L;
    private static final Long APP_ID = 100L;

    @BeforeEach
    @SuppressWarnings("unchecked")
    void setUp() {
        ValueOperations<String, Object> ops = mock(ValueOperations.class);
        when(redisTemplate.opsForValue()).thenReturn(ops);
        when(redisTemplate.hasKey(any())).thenReturn(false);

        // Default: COMPANY user exists
        User companyUser = new User();
        companyUser.setRoles(Set.of(Role.COMPANY));
        when(userRepository.findById(COMPANY_USER_ID)).thenReturn(Optional.of(companyUser));

        // STUDENT user
        User studentUser = new User();
        studentUser.setRoles(Set.of(Role.STUDENT));
        when(userRepository.findById(STUDENT_USER_ID)).thenReturn(Optional.of(studentUser));

        // ADMIN user
        User adminUser = new User();
        adminUser.setRoles(Set.of(Role.ADMIN));
        when(userRepository.findById(ADMIN_USER_ID)).thenReturn(Optional.of(adminUser));
    }

    private String companyToken() {
        return com.mydreamjob.auth.support.TestAuthTokens.bearer(COMPANY_USER_ID, "COMPANY");
    }

    private String studentToken() {
        return com.mydreamjob.auth.support.TestAuthTokens.bearer(STUDENT_USER_ID, "STUDENT");
    }

    private String adminToken() {
        return com.mydreamjob.auth.support.TestAuthTokens.bearer(ADMIN_USER_ID, "ADMIN");
    }

    private void mockCompanyExists() {
        Company company = Company.builder().id(COMPANY_ID).ownerUserId(COMPANY_USER_ID).name("测试企业").build();
        when(companyService.findCompanyByOwnerUserId(COMPANY_USER_ID)).thenReturn(company);
    }

    // ── 正常访问 ────────────────────────────────────────────────

    @Test void list_companyNormal_shouldReturn200() throws Exception {
        mockCompanyExists();
        CandidateListResponse resp = CandidateListResponse.builder()
                .items(List.of()).total(0).page(0).size(20).totalPages(0).build();
        when(applicationService.listCompanyCandidates(anyLong(), isNull(), isNull(), isNull(), isNull(), isNull(), anyInt(), anyInt()))
                .thenReturn(resp);

        mockMvc.perform(get("/company/candidates")
                        .header("Authorization", companyToken()))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.total").value(0));
    }

    @Test void detail_companyNormal_shouldReturn200() throws Exception {
        mockCompanyExists();
        CandidateDetailView detail = CandidateDetailView.builder()
                .applicationId(APP_ID).candidateName("张三").build();
        when(applicationService.getCompanyCandidateDetail(COMPANY_ID, APP_ID)).thenReturn(detail);

        mockMvc.perform(get("/company/candidates/" + APP_ID)
                        .header("Authorization", companyToken()))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.candidateName").value("张三"));
    }

    // ── 权限 ────────────────────────────────────────────────────

    @Test void list_noToken_shouldReturn401() throws Exception {
        mockMvc.perform(get("/company/candidates"))
                .andExpect(status().isUnauthorized());
    }

    @Test void list_student_shouldReturn403() throws Exception {
        mockMvc.perform(get("/company/candidates")
                        .header("Authorization", studentToken()))
                .andExpect(status().isForbidden());
    }

    @Test void list_admin_shouldReturn403() throws Exception {
        mockMvc.perform(get("/company/candidates")
                        .header("Authorization", adminToken()))
                .andExpect(status().isForbidden());
    }

    @Test void detail_student_shouldReturn403() throws Exception {
        mockMvc.perform(get("/company/candidates/" + APP_ID)
                        .header("Authorization", studentToken()))
                .andExpect(status().isForbidden());
    }

    @Test void detail_noToken_shouldReturn401() throws Exception {
        mockMvc.perform(get("/company/candidates/" + APP_ID))
                .andExpect(status().isUnauthorized());
    }

    @Test void list_companyNotFound_shouldReturn404() throws Exception {
        when(companyService.findCompanyByOwnerUserId(COMPANY_USER_ID)).thenReturn(null);

        mockMvc.perform(get("/company/candidates")
                        .header("Authorization", companyToken()))
                .andExpect(status().isNotFound())
                .andExpect(jsonPath("$.code").value(5001));
    }

    // ── 越权 ────────────────────────────────────────────────────

    @Test void detail_wrongCompany_shouldReturn403() throws Exception {
        mockCompanyExists();
        when(applicationService.getCompanyCandidateDetail(COMPANY_ID, APP_ID))
                .thenThrow(new BusinessException(ErrorCode.APPLICATION_OWNER_MISMATCH));

        mockMvc.perform(get("/company/candidates/" + APP_ID)
                        .header("Authorization", companyToken()))
                .andExpect(status().isForbidden())
                .andExpect(jsonPath("$.code").value(8004));
    }

    // ── 参数校验-分页 ────────────────────────────────────────────

    @Test void list_pageNegative_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?page=-1")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    @Test void list_sizeZero_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?size=0")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    @Test void list_sizeTooLarge_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?size=101")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    // ── 参数校验-status ──────────────────────────────────────────

    @Test void list_invalidStatus_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?status=INVALID")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    // ── 参数校验-sort/order ──────────────────────────────────────

    @Test void list_invalidSort_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?sort=invalid")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    @Test void list_invalidOrder_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?order=invalid")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    // ── 参数校验-keyword ─────────────────────────────────────────

    @Test void list_keywordTooLong_shouldReturn400() throws Exception {
        mockCompanyExists();
        String longKeyword = "a".repeat(101);
        mockMvc.perform(get("/company/candidates?keyword=" + longKeyword)
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    // ── 参数校验-jobId ───────────────────────────────────────────

    @Test void list_jobIdZero_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?jobId=0")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    @Test void list_jobIdNegative_shouldReturn400() throws Exception {
        mockCompanyExists();
        mockMvc.perform(get("/company/candidates?jobId=-1")
                        .header("Authorization", companyToken()))
                .andExpect(status().isBadRequest())
                .andExpect(jsonPath("$.code").value(1001));
    }

    // ── 详情-不存在 ─────────────────────────────────────────────

    @Test void detail_appNotFound_shouldReturn404() throws Exception {
        mockCompanyExists();
        when(applicationService.getCompanyCandidateDetail(COMPANY_ID, APP_ID))
                .thenThrow(new BusinessException(ErrorCode.APPLICATION_NOT_FOUND));

        mockMvc.perform(get("/company/candidates/" + APP_ID)
                        .header("Authorization", companyToken()))
                .andExpect(status().isNotFound())
                .andExpect(jsonPath("$.code").value(8002));
    }

    // ── 敏感字段隔离 ────────────────────────────────────────────

    @Test void list_shouldNotExposeSensitiveFields() throws Exception {
        mockCompanyExists();
        CandidateItemView item = CandidateItemView.builder()
                .applicationId(APP_ID).jobId(JOB_ID).jobTitle("Java").status("SUBMITTED")
                .candidateName("张三").candidateSchool("清华").candidateEducation("本科")
                .candidateGraduationYear((short)2026).candidateAvatarUrl("https://img/1.png")
                .createdAt(LocalDateTime.now()).updatedAt(LocalDateTime.now()).build();
        CandidateListResponse resp = CandidateListResponse.builder()
                .items(List.of(item)).total(1).page(0).size(20).totalPages(1).build();
        when(applicationService.listCompanyCandidates(anyLong(), isNull(), isNull(), isNull(), isNull(), isNull(), anyInt(), anyInt()))
                .thenReturn(resp);

        mockMvc.perform(get("/company/candidates")
                        .header("Authorization", companyToken()))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.items[0].candidateName").value("张三"))
                .andExpect(jsonPath("$.data.items[0].studentUserId").doesNotExist())
                .andExpect(jsonPath("$.data.items[0].phone").doesNotExist());
    }

    @Test void detail_shouldNotExposeSensitiveFields_butIncludeCoverLetter() throws Exception {
        mockCompanyExists();
        CandidateDetailView detail = CandidateDetailView.builder()
                .applicationId(APP_ID).jobId(JOB_ID).jobTitle("Java")
                .jobCity("北京").jobEmploymentType("全职").status("SUBMITTED")
                .coverLetter("这是我的自我介绍")
                .candidateName("张三").candidateAvatarUrl("https://img/1.png")
                .candidateBio("bio").candidateLocation("北京").candidateSchool("清华")
                .candidateEducation("本科").candidateGraduationYear((short)2026)
                .candidateSkills(List.of("Java", "Spring"))
                .createdAt(LocalDateTime.now()).updatedAt(LocalDateTime.now())
                .build();
        when(applicationService.getCompanyCandidateDetail(COMPANY_ID, APP_ID)).thenReturn(detail);

        mockMvc.perform(get("/company/candidates/" + APP_ID)
                        .header("Authorization", companyToken()))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.coverLetter").value("这是我的自我介绍"))
                .andExpect(jsonPath("$.data.phone").doesNotExist())
                .andExpect(jsonPath("$.data.passwordHash").doesNotExist())
                .andExpect(jsonPath("$.data.resumeUrl").doesNotExist());
    }
}