import uuid

from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import HttpResponseBadRequest
from django.shortcuts import render
from django.views import View
from rest_framework.parsers import FormParser
from rest_framework.views import APIView

from core.forms import TradeForm
from core.models import Account, Trade
from core.util import logs

log = logs.get_logger(__name__)


def get_trades(user, account=None):
    if user:
        trades = Trade.objects.filter(account__user=user)
    elif account:
        trades = Trade.objects.filter(account=account, account__user=user)
    return trades


class Trades(LoginRequiredMixin, View):
    allowed_types = ["modal", "widget", "window", "page"]
    window_content = "window-content/trades.html"

    async def get(self, request, type, account_id=None):
        if type not in self.allowed_types:
            return HttpResponseBadRequest
        template_name = f"wm/{type}.html"
        unique = str(uuid.uuid4())[:8]
        if account_id:
            try:
                trades = Account.objects.get(id=account_id, user=request.user)
            except Account.DoesNotExist:
                message = "Account does not exist."
                message_class = "danger"
                context = {
                    "message": message,
                    "class": message_class,
                    "type": type,
                }
                return render(request, template_name, context)
            trades = get_trades(request.user, account_id)
        else:
            trades = get_trades(request.user)
        if type == "page":
            type = "modal"
        context = {
            "title": f"Trades ({type})",
            "unique": unique,
            "window_content": self.window_content,
            "items": trades,
            "type": type,
        }
        return render(request, template_name, context)


class TradeAction(LoginRequiredMixin, APIView):
    allowed_types = ["modal", "widget", "window", "page"]
    window_content = "window-content/add-trade.html"
    parser_classes = [FormParser]

    def get(self, request, type, trade_id=None):
        """
        Get the form for adding or editing a trade.
        :param trade_id: The id of the trade to edit. Optional.
        """
        if type not in self.allowed_types:
            return HttpResponseBadRequest
        template_name = f"wm/{type}.html"
        unique = str(uuid.uuid4())[:8]
        if trade_id:
            try:
                trade = Trade.objects.get(id=trade_id, account__user=request.user)
                form = TradeForm(instance=trade)
            except Trade.DoesNotExist:
                message = "Trade does not exist"
                message_class = "danger"
                context = {
                    "message": message,
                    "message_class": message_class,
                    "window_content": self.window_content,
                }
                return render(request, template_name, context)
        else:
            form = TradeForm()
        if type == "page":
            type = "modal"
        context = {
            "form": form,
            "trade_id": trade_id,
            "type": type,
            "unique": unique,
            "window_content": self.window_content,
        }

        return render(request, template_name, context)

    def put(self, request, type, trade_id=None):
        """
        Add or edit a trade.
        :param trade_id: The id of the trade to edit. Optional.
        """
        if type not in self.allowed_types:
            return HttpResponseBadRequest
        message = None
        message_class = "success"

        if trade_id:
            try:
                form = TradeForm(
                    request.data,
                    instance=Trade.objects.get(id=trade_id, account__user=request.user),
                )
            except Trade.DoesNotExist:
                message = "Trade does not exist"
                message_class = "danger"
                context = {
                    "message": message,
                    "class": message_class,
                }
                return render(request, self.template_name, context)
        else:
            form = TradeForm(request.data)
        if form.is_valid():
            trade = form.save(commit=False)
            print("PRESAVE TRADE", trade)
            trade.user = request.user
            trade.save()
            success, returned = trade.post()
            if success:
                print("SAVED TRADE", trade)
                if trade_id:
                    message = f"Trade {trade_id} edited successfully"
                else:
                    message = f"Trade {trade.id} added successfully"
            else:
                message = f"Error adding trade: {returned}"
                message_class = "danger"
        else:
            message = "Error adding trade"
            message_class = "danger"

        trades = get_trades(request.user)

        context = {
            "items": trades,
            "type": type,
        }
        if message:
            context["message"] = message
            context["class"] = message_class
        template_name = "partials/trade-list.html"
        return render(request, template_name, context)

    def delete(self, request, type, trade_id):
        """
        Delete a trade.
        :param trade_id: The id of the trade to delete.
        """
        if type not in self.allowed_types:
            return HttpResponseBadRequest
        message = None
        message_class = "success"
        try:
            trade = Trade.objects.get(id=trade_id, account__user=request.user)
            trade.delete()
            message = "Trade deleted successfully"
        except Trade.DoesNotExist:
            message = "Error deleting trade"
            message_class = "danger"

        trades = get_trades(request.user)

        context = {
            "items": trades,
            "type": type,
        }
        if message:
            context["message"] = message
            context["class"] = message_class

        template_name = "partials/trade-list.html"
        return render(request, template_name, context)