from rest_framework import status
from rest_framework.views import APIView
from django.conf import settings
from manage_referrals.models import ReferralCode, ReferralRecord, ReferralRecordReward
from django.shortcuts import get_object_or_404
from goodtimes import constants
from django.db import transaction
from goodtimes.utils import ApiResponse
from manage_wallets.models import WithdrawalRequest
from .serializers import (
    ReferralCodeSerializer,
    ReferralRecordRewardSerializer,
    ReferralRecordSerializer,
)
from rest_framework.permissions import IsAuthenticated
from rest_framework_simplejwt.authentication import JWTAuthentication
from rest_framework.response import Response


class ReferralCodeViews(APIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = [IsAuthenticated]
    model = ReferralCode
    serializer = ReferralCodeSerializer

    def get(self, request, *args, **kwargs):
        referral_obj = self.model.filter_referral_code(principal=request.user)

        serializer_obj = self.serializer(referral_obj, many=True)

        success_message = {
            "status": status.HTTP_200_OK,
            "message": constants.SUCCESS,
            "data": serializer_obj.data,
        }
        return ApiResponse.success(**success_message)


class ReferralRecordViews(APIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = [IsAuthenticated]
    model = ReferralRecord
    serializer = ReferralRecordSerializer

    def get(self, request, *args, **kwargs):
        referral_obj = self.model.filter_invite_records(referrer_principal=request.user)

        serializer_obj = self.serializer(referral_obj, many=True)
        success_message = {
            "status": status.HTTP_200_OK,
            "message": constants.SUCCESS,
            "data": {"count": referral_obj.count(), "record": serializer_obj.data},
        }
        return ApiResponse.success(**success_message)


class RewardListView(APIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = [IsAuthenticated]
    model = ReferralRecordReward
    serializer = ReferralRecordRewardSerializer

    def get(self, request):
        # Filter rewards based on specified conditions
        current_principal = (
            request.user
        )  # Adjust based on how user is linked to principal

        # Filter rewards based on the authenticated referrer
        rewards_query = ReferralRecordReward.objects.filter(
            referral_record__referrer_principal=current_principal,
            sell=False,
            deleted=False,
            active=True,
        )
        # Serialize the results
        rewards_serializer = ReferralRecordRewardSerializer(rewards_query, many=True)
        # Get the count of unredeemed rewards
        unredeemed_count = rewards_query.count()
        success_message = {
            "status": status.HTTP_200_OK,
            "message": constants.SUCCESS,
            "data": {
                "reward_count": unredeemed_count,
                "rewards": rewards_serializer.data,
            },
        }
        return ApiResponse.success(**success_message)


class RedeemRewardView(APIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = [IsAuthenticated]

    def patch(self, request, unique_token):
        # Retrieve the reward using the unique token
        try:
            reward = ReferralRecordReward.objects.get(
                unique_token=unique_token, sell=False
            )
        except ReferralRecordReward.DoesNotExist:
            return ApiResponse.error(
                status=status.HTTP_404_NOT_FOUND,
                message=constants.FAILURE,
                errors="No unsold token found.",
            )

        # Check if a withdrawal request already exists for this token
        if WithdrawalRequest.objects.filter(token=unique_token).exists():
            return ApiResponse.error(
                status=status.HTTP_400_BAD_REQUEST,
                message=constants.FAILURE,
                errors="A withdrawal request for this token already exists.",
            )

        with transaction.atomic():
            # Create a new withdrawal request
            WithdrawalRequest.objects.create(
                principal=request.user, token=unique_token, coins=1, amount=reward.value
            )

            # Update reward to mark it as sold
            reward.sell = True
            reward.save()

        return ApiResponse.success(
            status=status.HTTP_200_OK,
            message=constants.SUCCESS,
            data="Token sold successfully.",
        )


class RedeemSelectedRewardsView(APIView):
    authentication_classes = [JWTAuthentication]
    permission_classes = [IsAuthenticated]

    def patch(self, request):
        # Extract the number of tokens from the request data
        num_tokens_to_sell = request.data.get("num_tokens", None)

        if num_tokens_to_sell is None:
            return ApiResponse.error(
                status=status.HTTP_400_BAD_REQUEST,
                message=constants.FAILURE,
                errors="Number of tokens to sell is required.",
            )

        try:
            num_tokens_to_sell = int(num_tokens_to_sell)
        except ValueError:
            return ApiResponse.error(
                status=status.HTTP_400_BAD_REQUEST,
                message=constants.FAILURE,
                errors="Invalid number of tokens.",
            )

        # Retrieve the rewards for the authenticated user
        rewards = ReferralRecordReward.objects.filter(
            referral_record__referrer_principal=request.user, sell=False
        ).order_by(
            "id"
        )  # FIFO method

        if rewards.count() < num_tokens_to_sell:
            return ApiResponse.error(
                status=status.HTTP_404_NOT_FOUND,
                message=constants.FAILURE,
                errors="Not enough unsold rewards available.",
            )

        # Select the required number of rewards
        rewards_to_sell = rewards[:num_tokens_to_sell]
        total_value = sum(reward.value for reward in rewards_to_sell)
        total_coins = sum(reward.coins for reward in rewards_to_sell)
        tokens = ",".join(str(reward.unique_token) for reward in rewards_to_sell)

        with transaction.atomic():
            # Create a new withdrawal request
            withdrawal_request = WithdrawalRequest.objects.create(
                principal=request.user,
                coins=total_coins,
                amount=total_value,
                token=tokens,
            )

            # Update each reward to mark it as sold
            for reward in rewards_to_sell:
                reward.sell = True
                reward.save()

        return ApiResponse.success(
            status=status.HTTP_200_OK,
            message=constants.SUCCESS,
            data="Selected tokens sold successfully.",
        )