import typing

from django.db import transaction
from rest_framework import status
from rest_framework import viewsets, filters
from rest_framework.decorators import action
from rest_framework.response import Response

from apps.core.api import BaseViewSet
from apps.core.mixins.search_mixin import DynamicSearchMixin
from apps.core.mixins.soft_delete_mixin import SoftDeleteMixin
from apps.warehouse import models as warehouse_models
from apps.warehouse.services.inventory_entry_dashboard_service import InventoryEntryDashboardService
from apps.warehouse.services.transaction_dashboard_service import TransactionDashboardService
from apps.warehouse.web.api.v1 import serializers as warehouse_serializers
from common.generics import base64_to_image_file
from common.helpers import get_organization_by_user
from common.liara_tools import upload_to_liara


class InventoryEntryViewSet(
    BaseViewSet,
    SoftDeleteMixin,
    viewsets.ModelViewSet,
    DynamicSearchMixin,
    InventoryEntryDashboardService
):
    queryset = warehouse_models.InventoryEntry.objects.all()
    serializer_class = warehouse_serializers.InventoryEntrySerializer
    # filter_backends = [filters.SearchFilter]
    search_fields = [
        "distribution__distribution_id",
        "organization__name",
        "org_quota_stat__quota__product__name",
        "delivery_address",
        "weight",
        "balance",
        "lading_number",
        "is_confirmed",
    ]
    date_field = "create_date"

    def upload_confirmation_document(self, request, inventory: int) -> typing.Any:
        """ upload document for inventory entry confirmation """

        inventory = self.queryset.get(id=inventory)

        # convert base64 to document file
        document = base64_to_image_file(
            request.data['document'],
            filename=f'inventory_entry_document_{inventory.id}'
        )
        file, file_format = document[0], document[1]

        # upload document to liara
        document_url = upload_to_liara(
            file,
            f'inventory_entry_document_{inventory.id}.{file_format}'
        )
        inventory.document = document_url
        inventory.is_confirmed = True
        inventory.save()
        return Response(status=status.HTTP_200_OK)

    @transaction.atomic
    def create(self, request, *args, **kwargs):
        """ custom create of inventory entry  """

        # create inventory entry
        inventory_balance = request.data['weight']

        organization = get_organization_by_user(request.user)
        request.data.update({
            'organization': organization.id,
            'balance': inventory_balance
        })

        serializer = self.serializer_class(data=request.data)
        serializer.is_valid(raise_exception=True)

        inventory_entry = serializer.save()

        # upload document for confirmation entry
        if 'document' in request.data.keys():
            self.upload_confirmation_document(request, inventory=inventory_entry.id)

        return Response(serializer.data, status=status.HTTP_201_CREATED)

    @transaction.atomic
    def update(self, request, pk=None, *args, **kwargs):
        """ edit inventory  """
        inventory = self.get_object()
        serializer = self.serializer_class(data=request.data, instance=inventory, partial=True)
        if serializer.is_valid():
            serializer.save()

            # upload document for confirmation entry
            if 'document' in request.data.keys():
                self.upload_confirmation_document(request, inventory=inventory.id)

            return Response(serializer.data, status=status.HTTP_200_OK)
        return Response(serializer.errors, status=status.HTTP_403_FORBIDDEN)

    @action(
        methods=['post'],
        detail=True,
        url_path='confirm_entry',
        url_name='confirm_entry',
        name='confirm_entry'
    )
    @transaction.atomic
    def confirm_inventory_entry(self, request, pk=None):
        """ confirm inventory entry """

        self.upload_confirmation_document(request, inventory=pk)
        return Response(status=status.HTTP_200_OK)

    @action(
        methods=['get'],
        detail=False,
        url_path='inventory_dashboard',
        url_name='inventory_dashboard',
        name='inventory_dashboard'
    )
    def inventory_dashboard(self, request):
        """ inventory entry dashboard """

        org = get_organization_by_user(request.user)
        query_param = self.request.query_params  # noqa

        # filter by date
        start_date = query_param.get('start') if 'start' in query_param.keys() else None
        end_date = query_param.get('end') if 'end' in query_param.keys() else None
        query_string = query_param.get('search') if 'search' in query_param.keys() else None

        return Response(
            self.get_dashboard(
                org=org,
                start_date=start_date,
                end_date=end_date,
                query_string=query_string,
                search_fields=self.search_fields,
            )
        )

    @action(
        methods=['get'],
        detail=True,
        url_path='my_entries_by_quota',
        url_name='my_entries_by_quota',
        name='my_entries_by_quota'
    )
    def my_inventory_entries_by_quota(self, request, pk=None):
        """ list of my inventory entries """

        params = self.request.query_params  # noqa
        if 'org_id' in params.keys():
            org = warehouse_models.Organization.objects.get(id=params.get('org_id'))
        else:
            org = get_organization_by_user(request.user)

        entries = self.get_queryset(
            visibility_by_org_scope=True
        ) if org.free_visibility_by_scope else self.get_queryset().filter(
            organization=org,
            quota_id=pk
        )
        queryset = self.filter_query(self.filter_queryset(entries))  # return by search param or all objects

        # paginate & response
        page = self.paginate_queryset(queryset)
        if page is not None:  # noqa
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(serializer.data)

    @action(
        methods=['get'],
        detail=False,
        url_path='my_entries',
        url_name='my_entries',
        name='my_entries'
    )
    def my_inventory_entries(self, request):
        """ list of my inventory entries """

        org = get_organization_by_user(request.user)
        entries = self.get_queryset(
            visibility_by_org_scope=True
        ) if org.free_visibility_by_scope else self.get_queryset().filter(organization=org)
        queryset = self.filter_query(self.filter_queryset(entries))  # return by search param or all objects

        # paginate & response
        page = self.paginate_queryset(queryset)
        if page is not None:  # noqa
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(serializer.data)


class InventoryQuotaSaleTransactionViewSet(
    BaseViewSet,
    SoftDeleteMixin,
    TransactionDashboardService,
    DynamicSearchMixin,
    viewsets.ModelViewSet,
):
    queryset = warehouse_models.InventoryQuotaSaleTransaction.objects.all()
    serializer_class = warehouse_serializers.InventoryQuotaSaleTransactionSerializer
    # filter_backends = [filters.SearchFilter]
    search_fields = [
        'rancher_fullname', 'rancher_mobile', 'pos_device__device_identity',
        'pos_device__acceptor', 'pos_device__terminal', 'pos_device__serial',
        'transaction_id', 'seller_organization__name',
        'quota_distribution__distribution_id', 'weight', 'delivery_address', 'transaction_price',
        'price_paid', 'price_type', 'product_type', 'transactions_number', 'transaction_status',
        'transaction_status_code', 'ref_num', 'terminal', 'payer_cart', 'transaction_date',
        'rancher__national_code'
    ]

    def list(self, request, *args, **kwargs):
        """
        list of transactions #
        filter by: search, all, my_transactions
        filter by: transaction status
        """
        if 'status' in request.GET.keys():
            status_param = self.request.query_params.get('status')  # noqa

            if status_param == 'waiting':
                queryset = self.get_queryset(
                    visibility_by_org_scope=True
                ).filter(transaction_status='waiting').order_by('-create_date')

            elif status_param == 'success':
                queryset = self.get_queryset(
                    visibility_by_org_scope=True
                ).filter(transaction_status='success').order_by('-create_date')

            elif status_param == 'failed':
                queryset = self.get_queryset(
                    visibility_by_org_scope=True
                ).filter(transaction_status='failed').order_by('-create_date')

            else:
                queryset = self.get_queryset(
                    visibility_by_org_scope=True
                ).order_by('-create_date')
        else:
            queryset = self.get_queryset(
                visibility_by_org_scope=True
            ).order_by('-create_date')

        queryset = self.filter_query(queryset)

        # paginate & response
        page = self.paginate_queryset(queryset)
        if page is not None:  # noqa
            serializer = self.get_serializer(page, many=True)
            return self.get_paginated_response(serializer.data)

    @action(
        methods=['get'],
        detail=False,
        url_path='transactions_dashboard',
        url_name='transactions_dashboard',
        name='transactions_dashboard'
    )
    def transactions_dashboard(self, request):
        """
        dashboard of full detail of all my transactions
        """
        query_param = self.request.query_params  # noqa

        start_date = query_param.get('start') if 'start' in query_param.keys() else None
        end_date = query_param.get('end') if 'end' in query_param.keys() else None
        transaction_status = query_param.get('status') if 'status' in query_param.keys() else None

        org = get_organization_by_user(request.user)
        # filer by date & transaction status
        transaction_dashboard_data = self.get_dashboard(
            org,
            start_date=start_date,
            end_date=end_date,
            status=transaction_status
        )

        return Response(transaction_dashboard_data, status=status.HTTP_200_OK)


class InventoryQuotaSaleItemViewSet(SoftDeleteMixin, BaseViewSet, viewsets.ModelViewSet):
    queryset = warehouse_models.InventoryQuotaSaleItem.objects.all()
    serializer_class = warehouse_serializers.InventoryQuotaSaleItemSerializer
    filter_backends = [filters.SearchFilter]
    search_fields = [
        'transaction',
        'quota_distribution',
        'gov_product',
        'free_product',
        'name',
        'price_type',
        'delivery_type',
        'paid_type',
        'item_type',
        'unit',
    ]