package com.tcm.training.admin.member.service;

import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.metadata.TableInfoHelper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.tcm.training.admin.common.PageResponse;
import com.tcm.training.admin.live.entity.Clinic;
import com.tcm.training.admin.live.mapper.ClinicMapper;
import com.tcm.training.admin.member.dto.UserBatchClinicUpdateRequest;
import com.tcm.training.admin.member.dto.UserUpdateRequest;
import com.tcm.training.admin.member.entity.AppUser;
import com.tcm.training.admin.member.mapper.UserMapper;
import com.tcm.training.admin.member.row.UserDetailRow;
import com.tcm.training.admin.member.row.UserListRow;
import com.tcm.training.admin.member.vo.UserDetailVO;
import com.tcm.training.admin.member.vo.UserListItemVO;
import org.apache.ibatis.builder.MapperBuilderAssistant;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import org.junit.jupiter.params.provider.ValueSource;
import org.mockito.ArgumentCaptor;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

import java.time.LocalDateTime;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.ArgumentMatchers.isNull;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
class UserAppServiceTest {

    @BeforeAll
    static void initLambdaCache() {
        MapperBuilderAssistant assistant = new MapperBuilderAssistant(new MybatisConfiguration(), "");
        TableInfoHelper.initTableInfo(assistant, AppUser.class);
    }

    @Mock
    private UserMapper userMapper;

    @Mock
    private ClinicMapper clinicMapper;

    @Mock
    private BCryptPasswordEncoder passwordEncoder;

    @InjectMocks
    private UserAppService userAppService;

    @Test
    void pageShouldMapMemberExpireAtForMemberUserQuery() {
        LocalDateTime memberExpireAt = LocalDateTime.of(2026, 6, 8, 3, 15);
        UserListRow row = new UserListRow();
        row.setId(11L);
        row.setNickname("王美丽");
        row.setPhone("14712346905");
        row.setAvatar("https://cdn.test/avatar.png");
        row.setIsMember(1);
        row.setMemberExpireAt(memberExpireAt);

        IPage<UserListRow> pageResult = new Page<UserListRow>(1, 10, 1);
        pageResult.setRecords(Collections.singletonList(row));
        when(userMapper.selectUserPage(
                any(),
                eq("王美丽"),
                eq("14712346905"),
                isNull(),
                isNull(),
                isNull(),
                eq("ACTIVE"),
                isNull(),
                isNull(),
                isNull(),
                isNull()
        )).thenReturn(pageResult);

        PageResponse<UserListItemVO> result = userAppService.page(
                1, 10, " 王美丽 ", "14712346905", null, null, null,
                "active", null, null, null, null
        );

        assertEquals(1, result.getList().size());
        assertEquals(memberExpireAt, result.getList().get(0).getMemberExpireAt());
        assertEquals(Boolean.TRUE, result.getList().get(0).getIsMember());
    }

    @Test
    void pageShouldRejectInvalidMemberStatus() {
        IllegalArgumentException error = assertThrows(
                IllegalArgumentException.class,
                () -> userAppService.page(
                        1, 10, null, null, null, null, null,
                        "INVALID", null, null, null, null
                )
        );

        assertEquals("会员状态筛选不合法", error.getMessage());
    }

    @Test
    void unbindWechatShouldClearWechatFieldsWithExplicitNullUpdate() {
        AppUser user = new AppUser();
        user.setId(12L);
        user.setDeleted(0);

        UserDetailRow detailRow = new UserDetailRow();
        detailRow.setId(12L);
        detailRow.setNickname("张医生");

        when(userMapper.selectOne(any())).thenReturn(user);
        when(userMapper.selectUserDetail(12L)).thenReturn(detailRow);

        UserDetailVO result = userAppService.unbindWechat(12L);

        ArgumentCaptor<LambdaUpdateWrapper<AppUser>> wrapperCaptor = ArgumentCaptor.forClass(LambdaUpdateWrapper.class);
        verify(userMapper).update(isNull(), wrapperCaptor.capture());
        verify(userMapper, never()).updateById(any(AppUser.class));
        String sqlSet = wrapperCaptor.getValue().getSqlSet();
        assertTrue(sqlSet.contains("wechat_openid"));
        assertTrue(sqlSet.contains("wechat_nickname"));
        assertTrue(sqlSet.contains("wechat_avatar"));
        assertTrue(sqlSet.contains("wechat_bound_at"));
        assertTrue(wrapperCaptor.getValue().getParamNameValuePairs().values().stream().allMatch(value -> value == null));
        assertEquals(Long.valueOf(12L), result.getId());
    }

    @ParameterizedTest
    @CsvSource({"10, 100", "20, 100", "20, "})
    void updateShouldSynchronizeClinicBindingIncludingStaleRelations(Long oldClinicId, Long oldDoctorId) {
        AppUser user = prepareUserUpdate(0);
        user.setClinicId(oldClinicId);
        user.setSuperiorClinicUserId(oldDoctorId);
        prepareClinicAccounts(1);

        userAppService.update(12L, updateRequest(20L));

        verify(userMapper).updateById(user);
        assertClinicBinding(Collections.singletonList(12L), 20L, 200L);
    }

    @Test
    void updateShouldExplicitlyClearBothClinicFields() {
        AppUser user = prepareUserUpdate(0);
        user.setClinicId(10L);
        user.setSuperiorClinicUserId(100L);

        userAppService.update(12L, updateRequest(null));

        assertClinicBinding(Collections.singletonList(12L), null, null);
        verify(clinicMapper, never()).selectById(any());
    }

    @Test
    void updateShouldPreserveDoctorAccountClinic() {
        AppUser user = prepareUserUpdate(1);
        user.setClinicId(10L);

        userAppService.update(12L, updateRequest(null));

        assertEquals(Long.valueOf(10L), user.getClinicId());
        verify(userMapper).updateById(user);
        verify(userMapper, never()).update(any(), any());
    }

    @Test
    void batchUpdateShouldSynchronizeBothClinicFields() {
        prepareClinicAccounts(1);
        when(userMapper.selectCount(any())).thenReturn(2L);

        userAppService.batchUpdateClinic(batchRequest());

        assertClinicBinding(Arrays.asList(12L, 13L), 20L, 200L);
    }

    @ParameterizedTest
    @ValueSource(ints = {0, 2})
    void updateShouldRejectMissingOrAmbiguousClinicAccount(int accountCount) {
        AppUser user = new AppUser();
        user.setId(12L);
        user.setType(0);
        when(userMapper.selectOne(any())).thenReturn(user);
        prepareClinicAccounts(accountCount);

        IllegalArgumentException error = assertThrows(IllegalArgumentException.class,
                () -> userAppService.update(12L, updateRequest(20L)));

        assertEquals(accountCount == 0 ? "目标诊所尚未关联诊所账号，无法绑定患者"
                : "目标诊所关联多个账号，请先确认患者归属", error.getMessage());
        assertNoUserWrite();
    }

    @ParameterizedTest
    @ValueSource(ints = {0, 2})
    void batchUpdateShouldRejectMissingOrAmbiguousClinicAccount(int accountCount) {
        prepareClinicAccounts(accountCount);

        assertThrows(IllegalArgumentException.class,
                () -> userAppService.batchUpdateClinic(batchRequest()));

        assertNoUserWrite();
    }

    @ParameterizedTest
    @ValueSource(booleans = {false, true})
    void batchUpdateShouldRejectMissingOrDeletedClinic(boolean deleted) {
        if (deleted) {
            Clinic clinic = new Clinic();
            clinic.setId(20L);
            clinic.setDeleted(1);
            when(clinicMapper.selectById(20L)).thenReturn(clinic);
        }

        IllegalArgumentException error = assertThrows(IllegalArgumentException.class,
                () -> userAppService.batchUpdateClinic(batchRequest()));

        assertEquals("绑定诊所不存在", error.getMessage());
        assertNoUserWrite();
    }

    @Test
    void batchUpdateShouldRejectUsersOutsidePersonalUserScope() {
        prepareClinicAccounts(1);
        when(userMapper.selectCount(any())).thenAnswer(invocation -> {
            com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<AppUser> query =
                    invocation.getArgument(0);
            assertTrue(query.getSqlSegment().contains("type ="));
            assertTrue(query.getParamNameValuePairs().containsValue(0));
            return 1L;
        });

        IllegalArgumentException error = assertThrows(IllegalArgumentException.class,
                () -> userAppService.batchUpdateClinic(batchRequest()));

        assertEquals("部分用户不存在或不是普通用户", error.getMessage());
        assertNoUserWrite();
    }

    private AppUser prepareUserUpdate(int type) {
        AppUser user = new AppUser();
        user.setId(12L);
        user.setType(type);
        user.setDeleted(0);
        // 第一次查询用户，第二次检查手机号冲突。
        when(userMapper.selectOne(any())).thenReturn(user, null);
        UserDetailRow detail = new UserDetailRow();
        detail.setId(12L);
        when(userMapper.selectUserDetail(12L)).thenReturn(detail);
        return user;
    }

    private void prepareClinicAccounts(int count) {
        Clinic clinic = new Clinic();
        clinic.setId(20L);
        clinic.setDeleted(0);
        when(clinicMapper.selectById(20L)).thenReturn(clinic);
        AppUser doctor = new AppUser();
        doctor.setId(200L);
        doctor.setType(1);
        doctor.setClinicId(20L);
        when(userMapper.selectList(any())).thenAnswer(invocation -> {
            com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<AppUser> query =
                    invocation.getArgument(0);
            String sql = query.getSqlSegment();
            assertTrue(sql.contains("clinic_id =") && sql.contains("type =") && sql.contains("deleted ="));
            assertTrue(query.getParamNameValuePairs().values().containsAll(Arrays.asList(20L, 1, 0)));
            return Collections.nCopies(count, doctor);
        });
    }

    private UserUpdateRequest updateRequest(Long clinicId) {
        UserUpdateRequest request = new UserUpdateRequest();
        request.setNickname("测试用户");
        request.setPhone("13800000000");
        request.setStatus(1);
        request.setClinicId(clinicId);
        return request;
    }

    private UserBatchClinicUpdateRequest batchRequest() {
        UserBatchClinicUpdateRequest request = new UserBatchClinicUpdateRequest();
        request.setUserIds(Arrays.asList(12L, 13L));
        request.setClinicId(20L);
        return request;
    }

    private void assertNoUserWrite() {
        verify(userMapper, never()).updateById(any(AppUser.class));
        verify(userMapper, never()).update(any(), any());
    }

    private void assertClinicBinding(List<Long> userIds, Long clinicId, Long doctorId) {
        ArgumentCaptor<LambdaUpdateWrapper<AppUser>> captor = ArgumentCaptor.forClass(LambdaUpdateWrapper.class);
        verify(userMapper).update(isNull(), captor.capture());
        LambdaUpdateWrapper<AppUser> update = captor.getValue();
        // 按列名核对绑定参数，避免诊所 ID 和诊所账号 ID 被误用。
        String[] assignments = update.getSqlSet().split(",");
        assertEquals(2, assignments.length);
        assertAssignment(update, assignments[0], "clinic_id", clinicId);
        assertAssignment(update, assignments[1], "superior_clinic_user_id", doctorId);
        String sql = update.getSqlSegment();
        assertTrue(sql.contains("id IN") && sql.contains("type =") && sql.contains("deleted ="));
        assertTrue(update.getParamNameValuePairs().values().containsAll(userIds));
        assertTrue(update.getParamNameValuePairs().containsValue(0));
    }

    private void assertAssignment(LambdaUpdateWrapper<AppUser> update, String assignment,
                                  String column, Long expectedValue) {
        assertTrue(assignment.startsWith(column + "="));
        String parameter = assignment.substring(assignment.lastIndexOf('.') + 1, assignment.length() - 1);
        assertTrue(update.getParamNameValuePairs().containsKey(parameter));
        assertEquals(expectedValue, update.getParamNameValuePairs().get(parameter));
    }
}