import json

from rest_framework import status
from rest_framework.exceptions import ValidationError

from api.admin_permission_conf import PERMISSIONS
from api.models import Role, TtDepartment
from api.models.setting import Setting
from api.views.admin.base import AdminApiBase
from api.validator import BaseValidator
from api.utils import log_critical_error, get_exception_detail
from api.translation import __


class RoleRules(AdminApiBase):
    def validate_request(self, request):
        rules = {
            "id": "nullable|array",
        }

        validator = BaseValidator(request.data, rules, {})
        error = validator.validate()
        if error:
            raise ValidationError(error)

    def get_permission_data(self, role):
        data = []

        for val in role.rolepermission_set.all():
            department_ids = list(
                val.rolepermissiondepartment_set.values_list("department_id", flat=True)
            )

            data.append({
                "permission": val.permission,
                "grant_to_all_department": val.grant_to_all_department,
                "department_ids": department_ids,
            })

        return data

    def post(self, request):
        try:
            self.api_log_skip_outgoing_data = True
            self.validate_request(request)

            ids = request.data.get("id")
            if not ids:
                ids = []

            role = None
            if isinstance(ids, (list, tuple)) and len(ids) == 1:
                role = (
                    Role.objects
                    .prefetch_related(
                        "rolepermission_set__rolepermissiondepartment_set"
                    )
                    .filter(id__in=ids)
                    .first()
                )

            info = None
            if role:
                info = {
                    "id": role.id,
                    "name": role.name,
                    "color": role.color,
                    "type": role.type,
                    "is_only_self": role.is_only_self,
                    "permissions": self.get_permission_data(role),
                    "created_at": role.created_at,
                }

            data = {}
            data["delete_confirmation_api"] = False
            data["allow_remove"] = [
                "permissions",
            ]

            data["permission"] = []
            for val in PERMISSIONS:
                data["permission"].append({
                    "code": val,
                    "name": __("permission." + val)
                })
            data["permission"].sort(key=lambda x: x["code"])

            data["department"] = list(
                TtDepartment.objects.values("id", "code", "name")
            )

            setting_params = {
                "default_color",
            }
            based_setting = Setting.get_multiple_setting(setting_params)
            data['default_color'] = json.loads(based_setting['default_color'])
            response = {
                "info": info,
                "rules": data,
            }

            return self.api_response(data=response)

        except ValidationError as e:
            return self.api_response(
                error=e.detail["error"],
                errors=e.detail["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
            )