package com.mydreamjob.job;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mydreamjob.audit.AuditContext;
import com.mydreamjob.auth.AuthSessionService;
import com.mydreamjob.auth.User;
import com.mydreamjob.auth.UserRepository;
import com.mydreamjob.company.Company;
import com.mydreamjob.company.CompanyRepository;
import org.junit.jupiter.api.AfterEach;
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.http.MediaType;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.TestPropertySource;
import org.springframework.test.web.servlet.MockMvc;

import java.time.Instant;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

/**
 * salaryMonths 通过**真实 Controller 的 HTTP 请求绑定**（MockMvc 全栈，非手工构造 Java DTO）验证：
 * 仅接受 JSON 整数 1—24，拒绝小数/字符串/布尔/数组/对象/超 int 范围；失败的写请求不产生任何部分更新。
 */
@SpringBootTest
@AutoConfigureMockMvc
@ActiveProfiles("integration-test")
@TestPropertySource(properties = "spring.datasource.url=jdbc:h2:mem:salary_months_http;MODE=MySQL;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE")
class JobSalaryMonthsHttpBindingTest {

    private static final AtomicInteger SEQ = new AtomicInteger();
    private static final String PHONE_PREFIX = "1990077";

    @MockBean private RedisTemplate<String, Object> redis;
    @Autowired private MockMvc mvc;
    @Autowired private JdbcTemplate jdbc;
    @Autowired private UserRepository users;
    @Autowired private CompanyRepository companies;
    @Autowired private AuthSessionService sessions;
    @Autowired private ObjectMapper mapper;

    private long userId;
    private long companyId;
    private String token;

    @BeforeEach
    void setUp() {
        User owner = users.saveAndFlush(User.builder()
                .phone(PHONE_PREFIX + String.format("%04d", SEQ.incrementAndGet()))
                .role(User.Role.COMPANY).roles(new HashSet<>(Set.of(User.Role.COMPANY)))
                .active(true).verified(true).build());
        userId = owner.getId();
        token = sessions.createSession(owner, Instant.now(), new AuditContext()).accessToken();
        companyId = companies.saveAndFlush(Company.builder()
                .ownerUserId(userId).name("月数绑定企业").verified(true).build()).getId();
    }

    @AfterEach
    void tearDown() {
        jdbc.update("delete from jobs where company_id = ?", companyId);
        jdbc.update("delete from companies where id = ?", companyId);
        jdbc.update("delete from auth_tokens where user_id = ?", userId);
        jdbc.update("delete from user_roles where user_id = ?", userId);
        jdbc.update("delete from users where id = ?", userId);
    }

    // ── 合法整数 ────────────────────────────────────────────────

    @Test
    void duplicateBenefitsOverRawTwentyAreAcceptedAndNormalized() throws Exception {
        var payload = (com.fasterxml.jackson.databind.node.ObjectNode) mapper.readTree(createBody("福利去重", "12"));
        var benefits = payload.putArray("benefits");
        for (int i = 0; i < 21; i++) benefits.add("  A  ");
        String body = mvc.perform(post("/jobs").header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(payload)))
                .andExpect(status().isOk()).andExpect(jsonPath("$.data.benefits.length()").value(1))
                .andExpect(jsonPath("$.data.benefits[0]").value("A"))
                .andReturn().getResponse().getContentAsString();
        long id = mapper.readTree(body).path("data").path("id").asLong();
        assertEquals("[\"A\"]", jdbc.queryForObject("SELECT benefits_json FROM jobs WHERE id=?", String.class, id));
    }

    @Test
    void benefitsItemLengthAppliesAfterTrimOnCreateAndUpdate() throws Exception {
        String padded = " ".repeat(25) + "A".repeat(40) + " ".repeat(25);
        var payload = (com.fasterxml.jackson.databind.node.ObjectNode) mapper.readTree(createBody("福利trim", "12"));
        payload.putArray("benefits").add(padded);
        String body = mvc.perform(post("/jobs").header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(payload)))
                .andExpect(status().isOk()).andExpect(jsonPath("$.data.benefits[0]").value("A".repeat(40)))
                .andReturn().getResponse().getContentAsString();
        long id = mapper.readTree(body).path("data").path("id").asLong();
        var update = mapper.createObjectNode();
        var benefits = update.putArray("benefits");
        for (int i = 0; i < 21; i++) benefits.add(padded);
        mvc.perform(put("/jobs/" + id).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(update)))
                .andExpect(status().isOk()).andExpect(jsonPath("$.data.benefits.length()").value(1));
        update.putArray("benefits").add("A".repeat(41));
        mvc.perform(put("/jobs/" + id).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(update)))
                .andExpect(status().isBadRequest());
        assertEquals("[\"" + "A".repeat(40) + "\"]",
                jdbc.queryForObject("SELECT benefits_json FROM jobs WHERE id=?", String.class, id));
    }

    @Test
    void benefitsTwentyDistinctAcceptedTwentyOneRejectedWithoutPartialUpdate() throws Exception {
        long id = createJob("福利数量", "12");
        var update = mapper.createObjectNode();
        var benefits = update.putArray("benefits");
        for (int i = 0; i < 20; i++) benefits.add("B" + i);
        mvc.perform(put("/jobs/" + id).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(update)))
                .andExpect(status().isOk()).andExpect(jsonPath("$.data.benefits.length()").value(20));
        String before = jdbc.queryForObject("SELECT benefits_json FROM jobs WHERE id=?", String.class, id);
        benefits.add("B20");
        update.put("title", "不得写入");
        mvc.perform(put("/jobs/" + id).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(update)))
                .andExpect(status().isBadRequest());
        assertEquals(before, jdbc.queryForObject("SELECT benefits_json FROM jobs WHERE id=?", String.class, id));
        assertEquals("福利数量", jdbc.queryForObject("SELECT title FROM jobs WHERE id=?", String.class, id));
        update.putNull("benefits");
        update.remove("title");
        mvc.perform(put("/jobs/" + id).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(mapper.writeValueAsString(update)))
                .andExpect(status().isOk()).andExpect(jsonPath("$.data.benefits.length()").value(20));
    }

    @Test
    void integersOneAndTwentyFourAreAcceptedOnCreate() throws Exception {
        long job1 = createJob("整数1", "1");
        assertEquals(1, salaryMonthsInDb(job1));
        assertEquals(1, responseSalaryMonths(job1));

        long job24 = createJob("整数24", "24");
        assertEquals(24, salaryMonthsInDb(job24));
        assertEquals(24, responseSalaryMonths(job24));
    }

    // ── 越界整数 ────────────────────────────────────────────────

    @Test
    void outOfRangeIntegersAreRejectedWithoutPartialWrite() throws Exception {
        long jobsBefore = jobCount();
        for (String raw : new String[]{"0", "-1", "25"}) {
            mvc.perform(post("/jobs").header("Authorization", bearer())
                            .contentType(MediaType.APPLICATION_JSON).content(createBody("越界", raw)))
                    .andExpect(status().isBadRequest());
        }
        assertEquals(jobsBefore, jobCount(), "越界写请求不得新增任何岗位记录");
    }

    // ── 小数 ────────────────────────────────────────────────────

    @Test
    void fractionalNumbersAreRejected() throws Exception {
        long jobsBefore = jobCount();
        for (String raw : new String[]{"1.9", "24.9", "1.0"}) {
            mvc.perform(post("/jobs").header("Authorization", bearer())
                            .contentType(MediaType.APPLICATION_JSON).content(createBody("小数", raw)))
                    .andExpect(status().isBadRequest());
        }
        assertEquals(jobsBefore, jobCount(), "小数写请求不得新增任何岗位记录");
    }

    // ── 错误类型 ────────────────────────────────────────────────

    @Test
    void wrongJsonTypesAreRejected() throws Exception {
        long jobsBefore = jobCount();
        for (String raw : new String[]{"\"12\"", "\"\"", "true", "[]", "{}"}) {
            mvc.perform(post("/jobs").header("Authorization", bearer())
                            .contentType(MediaType.APPLICATION_JSON).content(createBody("错类型", raw)))
                    .andExpect(status().isBadRequest());
        }
        assertEquals(jobsBefore, jobCount(), "类型错误的写请求不得新增任何岗位记录");
    }

    @Test
    void integerOutOfIntRangeIsRejected() throws Exception {
        mvc.perform(post("/jobs").header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(createBody("超范围", "99999999999")))
                .andExpect(status().isBadRequest());
    }

    // ── 缺省 / null：创建存 NULL，更新保持原值 ──────────────────

    @Test
    void missingAndNullOnCreateStoreNull() throws Exception {
        mvc.perform(post("/jobs").header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(createBodyNoSalary("缺省")))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.salaryMonths").doesNotExist());
        assertNull(firstJobSalaryMonths());

        long job = createJob("显式null", "null");
        assertNull(salaryMonthsInDb(job));
    }

    @Test
    void nullOnUpdateKeepsOriginal() throws Exception {
        long jobId = createJob("更新保持", "14");
        assertEquals(14, salaryMonthsInDb(jobId));

        // 缺省
        mvc.perform(put("/jobs/" + jobId).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content("{\"title\":\"更新保持-缺省\"}"))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.salaryMonths").value(14));
        assertEquals(14, salaryMonthsInDb(jobId));

        // 显式 null
        mvc.perform(put("/jobs/" + jobId).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content("{\"title\":\"更新保持-null\",\"salaryMonths\":null}"))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.salaryMonths").value(14));
        assertEquals(14, salaryMonthsInDb(jobId));
    }

    // ── 失败写请求：无部分更新 ──────────────────────────────────

    @Test
    void failedCreateWithValidTitleDoesNotPersistAnything() throws Exception {
        mvc.perform(post("/jobs").header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON)
                        .content("{\"title\":\"SHOULD_NOT_PERSIST\",\"description\":\"d\",\"city\":\"c\","
                                + "\"employmentType\":\"FULL_TIME\",\"salaryMonths\":25}"))
                .andExpect(status().isBadRequest());
        Integer count = jdbc.queryForObject(
                "select count(*) from jobs where title = ?", Integer.class, "SHOULD_NOT_PERSIST");
        assertEquals(0, count, "失败的创建请求不得留下标题已写入的记录");
    }

    @Test
    void failedUpdateDoesNotPartiallyChangeValidFields() throws Exception {
        long jobId = createJob("原标题", "14");

        mvc.perform(put("/jobs/" + jobId).header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON)
                        .content("{\"title\":\"PARTIAL_TITLE\",\"salaryMonths\":25}"))
                .andExpect(status().isBadRequest());

        mvc.perform(get("/jobs/" + jobId).header("Authorization", bearer()))
                .andExpect(status().isOk())
                .andExpect(jsonPath("$.data.title").value("原标题"))
                .andExpect(jsonPath("$.data.salaryMonths").value(14));
        assertEquals("原标题", jdbc.queryForObject(
                "select title from jobs where id = ?", String.class, jobId));
        assertEquals(14, salaryMonthsInDb(jobId));
    }

    // ── 探针等价断言：DTO 级严格整数（正式测试） ─────────────────

    @Test
    void objectMapperRejectsFractionalSalaryMonthsAtDtoLevel() {
        assertThrows(com.fasterxml.jackson.core.JsonProcessingException.class,
                () -> mapper.readValue("{\"salaryMonths\":1.9}", com.mydreamjob.job.dto.JobCreateRequest.class));
        assertThrows(com.fasterxml.jackson.core.JsonProcessingException.class,
                () -> mapper.readValue("{\"salaryMonths\":1.0}", com.mydreamjob.job.dto.JobUpdateRequest.class));
    }

    // ── Helper ──────────────────────────────────────────────────

    private long createJob(String title, String rawSalaryMonthsJsonOrNull) throws Exception {
        String body = rawSalaryMonthsJsonOrNull == null
                ? createBodyNoSalary(title)
                : createBody(title, rawSalaryMonthsJsonOrNull);
        String response = mvc.perform(post("/jobs").header("Authorization", bearer())
                        .contentType(MediaType.APPLICATION_JSON).content(body))
                .andExpect(status().isOk()).andReturn().getResponse().getContentAsString();
        return mapper.readTree(response).path("data").path("id").asLong();
    }

    private String createBody(String title, String rawSalaryMonthsJson) {
        return "{\"title\":\"" + title + "\",\"description\":\"d\",\"city\":\"c\","
                + "\"employmentType\":\"FULL_TIME\",\"salaryMonths\":" + rawSalaryMonthsJson + "}";
    }

    private String createBodyNoSalary(String title) {
        return "{\"title\":\"" + title + "\",\"description\":\"d\",\"city\":\"c\","
                + "\"employmentType\":\"FULL_TIME\"}";
    }

    private int responseSalaryMonths(long jobId) throws Exception {
        String response = mvc.perform(get("/jobs/" + jobId).header("Authorization", bearer()))
                .andExpect(status().isOk()).andReturn().getResponse().getContentAsString();
        JsonNode node = mapper.readTree(response).path("data").path("salaryMonths");
        return node.isMissingNode() || node.isNull() ? -1 : node.asInt();
    }

    private Integer salaryMonthsInDb(long jobId) {
        return jdbc.queryForObject("select salary_months from jobs where id = ?", Integer.class, jobId);
    }

    private Integer firstJobSalaryMonths() {
        List<Integer> values = jdbc.queryForList(
                "select salary_months from jobs where company_id = ?", Integer.class, companyId);
        assertEquals(1, values.size());
        return values.get(0);
    }

    private long jobCount() {
        return jdbc.queryForObject("select count(*) from jobs where company_id = ?", Long.class, companyId);
    }

    private String bearer() {
        return "Bearer " + token;
    }
}