from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponse
from django.urls import reverse
from mixins.views import ObjectDelete, ObjectList, ObjectUpdate
from rest_framework import status
from two_factor.views.mixins import OTPRequiredMixin

from core.clients.aggregators.nordigen import NordigenClient
from core.forms import RequisitionForm
from core.models import Aggregator, Requisition
from core.util import logs
from core.views.helpers import synchronize_async_helper

log = logs.get_logger(__name__)


class BanksRequisitionUpdate(LoginRequiredMixin, OTPRequiredMixin, ObjectUpdate):
    model = Requisition
    form_class = RequisitionForm

    page_title = "Update settings for requisition"

    submit_url_name = "requisition_update"
    submit_url_args = ["type", "aggregator_id", "req_id"]

    pk_required = False

    hide_cancel = True

    def get_object(self, **kwargs):
        aggregator_id = self.kwargs["aggregator_id"]
        req_id = self.kwargs["req_id"]

        try:
            aggregator = Aggregator.objects.get(
                user=self.request.user, pk=aggregator_id
            )
        except Aggregator.DoesNotExist:
            return HttpResponse(status=status.HTTP_404_NOT_FOUND)
        req, _ = Requisition.objects.get_or_create(
            user=self.request.user,
            aggregator=aggregator,
            requisition_id=req_id,
        )
        return req


class BanksRequisitionDelete(LoginRequiredMixin, OTPRequiredMixin, ObjectDelete):
    model = Requisition


class BanksCurrencies(LoginRequiredMixin, OTPRequiredMixin, ObjectList):
    """
    Get a list of bank accounts with their details.
    """

    list_template = "partials/banks-currencies-list.html"
    page_title = "Bank currencies"

    context_object_name_singular = "currency"
    context_object_name = "currencies"

    list_url_name = "currencies"
    list_url_args = ["type"]

    def get_context_data(self):
        context = super().get_context_data()
        self.extra_buttons = [
            {
                "url": reverse("bank_fetch"),
                "action": "refresh",
                "method": "get",
                "label": "Fetch account details",
                "icon": "fa-solid fa-refresh",
            },
        ]
        return context

    def get_queryset(self, **kwargs):
        aggregators = Aggregator.objects.filter(user=self.request.user, enabled=True)

        account_info = {}
        for agg in aggregators:
            for bank, accounts in agg.account_info.items():
                for account in accounts:
                    ident = (bank, account["requisition_id"], account["aggregator_id"])
                    if ident not in account_info:
                        account_info[ident] = []
                    account_info[ident].append(account)

        return account_info


class BanksBalances(LoginRequiredMixin, OTPRequiredMixin, ObjectList):
    """
    Get the bank balances.
    """

    list_template = "partials/banks-balances-list.html"
    page_title = "Bank balances"

    context_object_name_singular = "balance"
    context_object_name = "balances"

    list_url_name = "balances"
    list_url_args = ["type"]

    def get_context_data(self):
        context = super().get_context_data()
        self.extra_buttons = [
            {
                "url": reverse("bank_fetch"),
                "action": "refresh",
                "method": "get",
                "label": "Fetch account details",
                "icon": "fa-solid fa-refresh",
            },
        ]
        return context

    def get_queryset(self, **kwargs):
        aggregators = Aggregator.objects.filter(user=self.request.user, enabled=True)
        account_balances = {}
        for aggregator in aggregators:
            run = synchronize_async_helper(NordigenClient(aggregator))
            balance_map = synchronize_async_helper(run.get_all_balances())
            for k, v in balance_map.items():
                if k not in account_balances:
                    account_balances[k] = []
                for item in v:
                    account_balances[k].append(item)

        return account_balances


class BanksTransactions(LoginRequiredMixin, OTPRequiredMixin, ObjectList):
    """
    Get bank transactions.
    """

    list_template = "partials/banks-transactions-list.html"
    page_title = "Bank transactions"

    context_object_name_singular = "transaction"
    context_object_name = "transactions"

    list_url_name = "transactions"
    list_url_args = ["type", "account_id", "aggregator_id"]

    def get_queryset(self, **kwargs):
        aggregator_id = self.kwargs.get("aggregator_id")
        account_id = self.kwargs.get("account_id")
        try:
            aggregator = Aggregator.get_by_id(aggregator_id, self.request.user)
        except Aggregator.DoesNotExist:
            context = {
                "message": "Aggregator does not exist",
                "class": "danger",
            }
            return self.render_to_response(context)

        run = synchronize_async_helper(NordigenClient(aggregator))
        transactions = synchronize_async_helper(
            run.get_transactions(account_id, pending=True)
        )
        return transactions