from rest_framework import status
from rest_framework.exceptions import ValidationError

from api.models import EsStaff
from api.translation import __
from api.utils import log_critical_error, get_exception_detail
from api.validator import BaseValidator
from api.views.admin.base import AdminApiBase

class StaffList(AdminApiBase):
    list_default_order_column = "id"

    def validate_request(self, request):
        rules = {
            "filter": "nullable",
            "page": "nullable",
            "per_page": "nullable",
            "sort_by": "nullable",
            "order_by": "nullable",
        }
        validator = BaseValidator(request.data, rules, {})
        error = validator.validate()
        if error:
            raise ValidationError(error)

    def custom_listing_filter(self, request, model):
        filters = request.data.get("filter")
        if filters:
            for key, val in filters.items():
                if val == "" or val is None:
                    continue
                match key:
                    case "desc" | "email" | "phone":
                        filter_kwargs = {f"{key}__icontains": val}
                        model = model.filter(**filter_kwargs)
                    case "status":
                        if isinstance(val, (list, tuple)):
                            model = model.filter(status__in=val)
                        else:
                            model = model.filter(status=val)
                    case "tag_id":
                        if isinstance(val, (list, tuple)):
                            model = model.filter(tag__tag_id__in=val)
                        else:
                            model = model.filter(tag__tag_id=val)
        return model
    
    def post(self, request):
        try:
            self.api_log_skip_outgoing_data = True
            self.validate_request(request)
            
            data_details = self.get_data(request)
            
            response = {
                "page": data_details["page"],
                "per_page": data_details["per_page"],
                "total": data_details["total"],
                "data": data_details["data"]
            }
            return self.api_response(data=response)
        except ValidationError as e:
            first_message = e.detail['error']
            errors = e.detail['errors']
            return self.api_response(error=first_message,errors=errors,code=status.HTTP_400_BAD_REQUEST)
        except Exception as e:
            e_details = get_exception_detail(e)
            log_critical_error(user_id=None,descr=e_details['descr'],url=e_details['url'],trace=e_details['trace'])
            return self.api_response(error=__("message.internal_server_error"),code=status.HTTP_500_INTERNAL_SERVER_ERROR)

    def get_data(self,request):
        staffs = (
            EsStaff.objects
            .select_related("department")
            .prefetch_related(
                "tag__tag" #tags means the relation add in models, __tag means the relation table tag_id get the tag object
            )
        )

        staffs = self.listing_filter(request, staffs)
        staffs = self.custom_listing_filter(request, staffs)
        paginated_details = self.listing_pagination(request, staffs)
        total = paginated_details["total"]
        paginated_data = paginated_details["paginated_data"]
        page = paginated_details["page"]
        per_page = paginated_details["per_page"]

        return_data=[]

        for val in paginated_data:
            data={}
            data["id"] = val.id
            data["code"] = val.code
            data["name"] = val.name
            data['desc'] = val.desc
            data['department'] = val.department.name if val.department else None
            data['department_id'] = val.department_id
            data['email'] = val.email
            data['phone'] = val.phone
            data["status"] = val.status
            data["status_text"] = __("attr.staff_status." + str(val.status))

            data["tag"] = [
                {"id": tag.tag.id, "name": tag.tag.name}
                for tag in val.tag.all()
            ]

            for i in range(1,11):
                extra_data_field = f"extra_data_{i}"
                data[extra_data_field] = getattr(val,extra_data_field,None)

            return_data.append(data)

        return {
            "page": page,
            "per_page": per_page,
            "total": total,
            "data": return_data
        }