from employee.models import Employee


def filtersubordinates(request,queryset,perm=None):
    """
    This method is used to filter out subordinates queryset element.
    """
    user = request.user
    if user.has_perm(perm):
        return queryset
    manager = Employee.objects.filter(employee_user_id=user).first()
    queryset = queryset.filter(employee_id__employee_work_info__reporting_manager_id=manager)
    return queryset


def filtersubordinatesemployeemodel(request,queryset,perm=None):
    """
    This method is used to filter out subordinates queryset element.
    """
    user = request.user
    if user.has_perm(perm):
        return queryset
    manager = Employee.objects.filter(employee_user_id=user).first()
    queryset = queryset.filter(employee_work_info__reporting_manager_id=manager)
    return queryset



def is_reportingmanager(request):
    """
    This method is used to check weather the employee is reporting manager or not.
    """
    try:
        user = request.user
        return user.employee_get.reporting_manager.all().exists()
    except:
        return False


def choosesubordinates(request,form,perm,):
    user = request.user
    if user.has_perm(perm):
        return form
    manager = Employee.objects.filter(employee_user_id=user).first()
    queryset = Employee.objects.filter(employee_work_info__reporting_manager_id=manager)
    form.fields['employee_id'].queryset = queryset
    return form


def choosesubordinatesemployeemodel(request,form,perm):
    user = request.user
    if user.has_perm(perm):
        return form
    manager = Employee.objects.filter(employee_user_id=user).first()
    queryset = Employee.objects.filter(employee_work_info__reporting_manager_id=manager)

    form.fields['employee_id'].queryset = queryset
    return form



orderingList = [{
    'id':'',
    'field':'',
    'ordering':'',
}]

def sortby(request,queryset,key):
    """
    This method is used to sort query set by asc or desc
    """
    global orderingList
    id = request.user.id 
    # here will create dictionary object to the global orderingList if not exists, 
    # if exists then method will switch corresponding object ordering.
    filtered_list = [x for x in orderingList if x['id'] ==id]
    ordering = filtered_list[0] if filtered_list else None
    if ordering is None:
        ordering = {
            'id':id,
            'field':None,
            'ordering':'-',
        }
        orderingList.append(ordering)
    sortby = request.GET.get(key)
    if sortby is not None and sortby != '':
        # here will update the orderingList
        ordering['field']=sortby
        if queryset.query.order_by == queryset.query.order_by:
            queryset = queryset.order_by(f'{ordering["ordering"]}{sortby}')
        if ordering['ordering']=='-':
            ordering['ordering']=''
        else:
            ordering["ordering"]='-'        
        orderingList = [item for item in orderingList if item["id"] != id]
        orderingList.append(ordering)

    return queryset