package hr

import (
	"WiiCITMS/models/hr"
	"WiiCITMS/process/common"
	"WiiGenerates/WiiCITMS/generates/v1/go/types"
	"WiiGoLibrary/apply/middle/process/v1"
	"errors"
)

// PermissionCheckResult 权限检查结果
type PermissionCheckResult struct {
	HasPermission bool   `json:"hasPermission"` // 是否有权限
	ErrorMessage  string `json:"errorMessage"`  // 错误信息
	ErrorCode     int    `json:"errorCode"`     // 错误代码
}

// 使用common包中定义的常量

// CheckAccessControl 检查访问控制
// staffGuid: 进行操作的员工ID
// operation: 操作类型 (create, update, delete, view, approve)
// resource: 资源类型 (organization, position, staff, leave, workflow)
// resourceId: 资源ID，可选
func CheckAccessControl(staffGuid string, operation string, resource string, resourceId string) *PermissionCheckResult {
	// 结果默认为无权限
	result := &PermissionCheckResult{
		HasPermission: false,
		ErrorMessage:  "权限不足",
		ErrorCode:     common.NoPermissionErrorCode,
	}

	// 检查是否系统管理员，系统管理员拥有全部权限
	isAdmin, proc := IsSystemAdmin(staffGuid)
	if proc.IsError() {
		result.ErrorMessage = "权限检查失败: " + proc.Error.Error()
		return result
	}
	
	if isAdmin {
		result.HasPermission = true
		result.ErrorMessage = ""
		result.ErrorCode = 0
		return result
	}

	// 根据资源类型和操作类型确定所需权限ID
	permissionID := getRequiredPermissionID(resource, operation)
	if permissionID <= 0 {
		result.ErrorMessage = "未定义的权限操作"
		return result
	}

	// 检查岗位权限
	params := CheckPermissionRequest{
		StaffGuid:    staffGuid,
		PermissionID: permissionID,
	}
	
	// 如果提供了资源ID，且资源是组织相关的，则添加组织ID限定
	if resourceId != "" && (resource == common.ResourceOrganization || resource == common.ResourceStaff) {
		params.OrganizationGuid = resourceId
	}

	hasPermission, proc := CheckStaffPermission(params)
	if proc.IsError() {
		result.ErrorMessage = "权限检查失败: " + proc.Error.Error()
		return result
	}

	if hasPermission {
		result.HasPermission = true
		result.ErrorMessage = ""
		result.ErrorCode = 0
	}

	return result
}

// 根据资源类型和操作类型确定所需的权限ID
func getRequiredPermissionID(resource string, operation string) int {
	switch resource {
	case common.ResourceOrganization:
		switch operation {
		case common.OperationView:
			return hr.PermOrganizationView
		case common.OperationCreate:
			return hr.PermOrganizationCreate
		case common.OperationUpdate:
			return hr.PermOrganizationUpdate
		case common.OperationDelete:
			return hr.PermOrganizationDelete
		}
	case common.ResourcePosition:
		switch operation {
		case common.OperationView:
			return hr.PermPositionView
		case common.OperationCreate:
			return hr.PermPositionCreate
		case common.OperationUpdate:
			return hr.PermPositionUpdate
		case common.OperationDelete:
			return hr.PermPositionDelete
		}
	case common.ResourceStaff:
		switch operation {
		case common.OperationView:
			return hr.PermStaffView
		case common.OperationCreate:
			return hr.PermStaffCreate
		case common.OperationUpdate:
			return hr.PermStaffUpdate
		case common.OperationDelete:
			return hr.PermStaffDelete
		}
	case common.ResourceLeave:
		switch operation {
		case common.OperationView:
			return hr.PermLeaveView
		case common.OperationApprove:
			return hr.PermLeaveApprove
		}
	case common.ResourceWorkflow:
		return hr.PermWorkflowAdmin
	}
	return 0
}

// RequirePermission 要求权限装饰器
// 用于包装处理函数，确保在执行前进行权限检查
func RequirePermission(staffGuid string, operation string, resource string, resourceId string) *process.Process {
	result := CheckAccessControl(staffGuid, operation, resource, resourceId)
	if !result.HasPermission {
		return process.FailError(types.NoPermissionError, errors.New(result.ErrorMessage))
	}
	return nil
}