package cn.iocoder.yudao.module.hrm.controller.admin.employee;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import cn.iocoder.yudao.framework.apilog.core.annotation.ApiAccessLog;
import cn.iocoder.yudao.framework.common.pojo.CommonResult;
import cn.iocoder.yudao.framework.common.pojo.PageParam;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.framework.excel.core.util.ExcelUtils;
import cn.iocoder.yudao.module.hrm.controller.admin.employee.vo.HrmEmployeePageReqVO;
import cn.iocoder.yudao.module.hrm.controller.admin.employee.vo.HrmEmployeeRespVO;
import cn.iocoder.yudao.module.hrm.controller.admin.employee.vo.HrmEmployeeSaveReqVO;
import cn.iocoder.yudao.module.hrm.controller.admin.employee.vo.HrmEmployeeSimpleRespVO;
import cn.iocoder.yudao.module.hrm.dal.dataobject.employee.HrmEmployeeDO;
import cn.iocoder.yudao.module.hrm.service.employee.HrmEmployeeService;
import cn.iocoder.yudao.module.system.api.dept.DeptApi;
import cn.iocoder.yudao.module.system.api.dept.PostApi;
import cn.iocoder.yudao.module.system.api.dept.dto.DeptRespDTO;
import cn.iocoder.yudao.module.system.api.dept.dto.PostRespDTO;
import cn.iocoder.yudao.module.system.api.permission.RoleApi;
import cn.iocoder.yudao.module.system.api.permission.dto.RoleRespDTO;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.Parameter;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.validation.Valid;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.io.IOException;
import java.util.*;
import java.util.stream.Collectors;

import static cn.iocoder.yudao.framework.apilog.core.enums.OperateTypeEnum.EXPORT;
import static cn.iocoder.yudao.framework.common.pojo.CommonResult.success;

@Tag(name = "管理后台 - HRM 员工")
@RestController
@RequestMapping("/hrm/employee")
@Validated
public class HrmEmployeeController {

    @Resource
    private HrmEmployeeService employeeService;
    @Resource
    private DeptApi deptApi;
    @Resource
    private PostApi postApi;
    @Resource
    private RoleApi roleApi;

    @PostMapping("/create")
    @Operation(summary = "创建员工")
    @PreAuthorize("@ss.hasPermission('hrm:employee:create')")
    public CommonResult<Long> createEmployee(@Valid @RequestBody HrmEmployeeSaveReqVO createReqVO) {
        return success(employeeService.createEmployee(createReqVO));
    }

    @PutMapping("/update")
    @Operation(summary = "更新员工")
    @PreAuthorize("@ss.hasPermission('hrm:employee:update')")
    public CommonResult<Boolean> updateEmployee(@Valid @RequestBody HrmEmployeeSaveReqVO updateReqVO) {
        employeeService.updateEmployee(updateReqVO);
        return success(true);
    }

    @DeleteMapping("/delete")
    @Operation(summary = "删除员工")
    @Parameter(name = "id", description = "员工ID", required = true)
    @PreAuthorize("@ss.hasPermission('hrm:employee:delete')")
    public CommonResult<Boolean> deleteEmployee(@RequestParam("id") Long id) {
        employeeService.deleteEmployee(id);
        return success(true);
    }

    @GetMapping("/get")
    @Operation(summary = "获得员工详情")
    @Parameter(name = "id", description = "员工ID", required = true)
    @PreAuthorize("@ss.hasPermission('hrm:employee:query')")
    public CommonResult<HrmEmployeeRespVO> getEmployee(@RequestParam("id") Long id) {
        return success(employeeService.getEmployeeDetail(id));
    }

    @GetMapping("/page")
    @Operation(summary = "获得员工分页")
    @PreAuthorize("@ss.hasPermission('hrm:employee:query')")
    public CommonResult<PageResult<HrmEmployeeRespVO>> getEmployeePage(@Valid HrmEmployeePageReqVO pageReqVO) {
        PageResult<HrmEmployeeDO> pageResult = employeeService.getEmployeePage(pageReqVO);
        // 转换为 VO
        List<HrmEmployeeRespVO> list = BeanUtils.toBean(pageResult.getList(), HrmEmployeeRespVO.class);
        // 填充部门、岗位、角色名称
        if (CollUtil.isNotEmpty(list)) {
            fillEmployeeInfo(list, pageResult.getList());
        }
        return success(new PageResult<>(list, pageResult.getTotal()));
    }

    /**
     * 填充员工信息（部门、岗位、角色名称）
     */
    private void fillEmployeeInfo(List<HrmEmployeeRespVO> respList, List<HrmEmployeeDO> employeeList) {
        // 1. 批量获取部门信息
        Set<Long> deptIds = employeeList.stream()
                .map(HrmEmployeeDO::getDeptId)
                .filter(Objects::nonNull)
                .collect(Collectors.toSet());
        Map<Long, DeptRespDTO> deptMap = CollUtil.isEmpty(deptIds) ? Collections.emptyMap() : deptApi.getDeptMap(deptIds);

        // 2. 批量获取岗位信息
        Set<Long> postIds = employeeList.stream()
                .map(HrmEmployeeDO::getPostId)
                .filter(Objects::nonNull)
                .collect(Collectors.toSet());
        Map<Long, PostRespDTO> postMap = CollUtil.isEmpty(postIds) ? Collections.emptyMap() : postApi.getPostMap(postIds);

        // 3. 收集所有角色ID
        Set<Long> allRoleIds = new HashSet<>();
        for (HrmEmployeeDO employee : employeeList) {
            if (StrUtil.isNotBlank(employee.getRoleIds())) {
                List<Long> roleIds = JSONUtil.toList(employee.getRoleIds(), Long.class);
                allRoleIds.addAll(roleIds);
            }
        }
        Map<Long, RoleRespDTO> roleMap = CollUtil.isEmpty(allRoleIds) ? Collections.emptyMap() :
                roleApi.getRoleList(allRoleIds).stream()
                        .collect(Collectors.toMap(RoleRespDTO::getId, r -> r));

        // 4. 填充信息
        for (int i = 0; i < respList.size(); i++) {
            HrmEmployeeRespVO respVO = respList.get(i);
            HrmEmployeeDO employee = employeeList.get(i);

            // 填充部门名称
            if (employee.getDeptId() != null && deptMap.containsKey(employee.getDeptId())) {
                respVO.setDeptName(deptMap.get(employee.getDeptId()).getName());
            }

            // 填充岗位名称
            if (employee.getPostId() != null && postMap.containsKey(employee.getPostId())) {
                respVO.setPostName(postMap.get(employee.getPostId()).getName());
            }

            // 解析 roleIds 并填充角色名称
            if (StrUtil.isNotBlank(employee.getRoleIds())) {
                List<Long> roleIds = JSONUtil.toList(employee.getRoleIds(), Long.class);
                respVO.setRoleIds(roleIds);
                if (CollUtil.isNotEmpty(roleIds)) {
                    List<String> roleNames = roleIds.stream()
                            .filter(roleMap::containsKey)
                            .map(id -> roleMap.get(id).getName())
                            .collect(Collectors.toList());
                    respVO.setRoleNames(String.join(",", roleNames));
                }
            }
        }
    }

    @GetMapping("/simple-list")
    @Operation(summary = "获得员工精简列表", description = "用于下拉选择")
    public CommonResult<List<HrmEmployeeSimpleRespVO>> getEmployeeSimpleList(
            @RequestParam(value = "employeeStatus", required = false) Integer employeeStatus) {
        return success(employeeService.getEmployeeSimpleList(employeeStatus));
    }

    @GetMapping("/export-excel")
    @Operation(summary = "导出员工 Excel")
    @PreAuthorize("@ss.hasPermission('hrm:employee:export')")
    @ApiAccessLog(operateType = EXPORT)
    public void exportEmployeeExcel(@Valid HrmEmployeePageReqVO pageReqVO,
                                     HttpServletResponse response) throws IOException {
        pageReqVO.setPageSize(PageParam.PAGE_SIZE_NONE);
        PageResult<HrmEmployeeDO> pageResult = employeeService.getEmployeePage(pageReqVO);
        List<HrmEmployeeDO> employeeList = pageResult.getList();
        // 转换为 VO
        List<HrmEmployeeRespVO> list = BeanUtils.toBean(employeeList, HrmEmployeeRespVO.class);
        // 填充部门、岗位、角色名称
        if (CollUtil.isNotEmpty(list)) {
            fillEmployeeInfo(list, employeeList);
        }
        ExcelUtils.write(response, "员工信息.xls", "数据", HrmEmployeeRespVO.class, list);
    }

}