import logging
from abc import ABC, abstractmethod
from typing import Any

from django.conf import settings
from djmoney.money import Money

from order.enum.status import PaymentStatus

logger = logging.getLogger(__name__)


class PaymentProvider(ABC):
    @abstractmethod
    def process_payment(
        self, amount: Money, order_id: str, **kwargs
    ) -> tuple[bool, dict[str, Any]]:
        pass

    @abstractmethod
    def refund_payment(
        self, payment_id: str, amount: Money | None = None
    ) -> tuple[bool, dict[str, Any]]:
        pass

    @abstractmethod
    def get_payment_status(
        self, payment_id: str
    ) -> tuple[PaymentStatus, dict[str, Any]]:
        pass


class StripePaymentProvider(PaymentProvider):
    def __init__(self):
        self.api_key = settings.STRIPE_API_KEY
        self.webhook_secret = settings.STRIPE_WEBHOOK_SECRET

        # @TODO - In a real implementation, we would import and use the Stripe SDK here
        # import stripe
        # stripe.api_key = self.api_key

    def process_payment(
        self, amount: Money, order_id: str, **kwargs
    ) -> tuple[bool, dict[str, Any]]:
        try:
            logger.info(
                "Processing Stripe payment",
                extra={
                    "amount": str(amount.amount),
                    "currency": amount.currency,
                    "order_id": order_id,
                },
            )

            # @TODO - In a real implementation:
            # payment_intent = stripe.PaymentIntent.create(
            #     amount=int(amount.amount * 100),  # Convert to cents
            #     currency=amount.currency.lower(),
            #     metadata={"order_id": order_id},
            #     **kwargs
            # )

            # Mock response for demonstration
            payment_data = {
                "payment_id": f"pi_{order_id}_mock",
                "status": PaymentStatus.COMPLETED,
                "amount": str(amount.amount),
                "currency": amount.currency,
                "provider": "stripe",
            }

            return True, payment_data

        except Exception as e:
            logger.error(
                f"Stripe payment processing failed: {e!s}",
                extra={"order_id": order_id, "error": str(e)},
            )
            return False, {"error": str(e)}

    def refund_payment(
        self, payment_id: str, amount: Money | None = None
    ) -> tuple[bool, dict[str, Any]]:
        try:
            logger.info(
                "Processing Stripe refund",
                extra={
                    "payment_id": payment_id,
                    "amount": str(amount.amount) if amount else "full",
                },
            )

            # @TODO - In a real implementation:
            # refund_params = {"payment_intent": payment_id}
            # if amount:
            #     refund_params["amount"] = int(amount.amount * 100)  # Convert to cents
            # refund = stripe.Refund.create(**refund_params)

            # Mock response
            refund_data = {
                "refund_id": f"re_{payment_id}_mock",
                "status": PaymentStatus.REFUNDED,
                "amount": str(amount.amount) if amount else "full refund",
                "payment_id": payment_id,
            }

            return True, refund_data

        except Exception as e:
            logger.error(
                f"Stripe refund failed: {e!s}",
                extra={"payment_id": payment_id, "error": str(e)},
            )
            return False, {"error": str(e)}

    def get_payment_status(
        self, payment_id: str
    ) -> tuple[PaymentStatus, dict[str, Any]]:
        try:
            logger.info(
                "Getting Stripe payment status",
                extra={"payment_id": payment_id},
            )

            # @TODO - In a real implementation:
            # payment_intent = stripe.PaymentIntent.retrieve(payment_id)
            # status_mapping = {
            #     "succeeded": PaymentStatus.COMPLETED,
            #     "processing": PaymentStatus.PROCESSING,
            #     "requires_payment_method": PaymentStatus.PENDING,
            #     "canceled": PaymentStatus.CANCELED,
            #     # ... other mappings
            # }
            # status = status_mapping.get(payment_intent.status, PaymentStatus.FAILED)

            # Mock response
            status = PaymentStatus.COMPLETED
            status_data = {
                "payment_id": payment_id,
                "raw_status": "succeeded",
                "provider": "stripe",
            }

            return status, status_data

        except Exception as e:
            logger.error(
                f"Failed to get Stripe payment status: {e!s}",
                extra={"payment_id": payment_id, "error": str(e)},
            )
            return PaymentStatus.FAILED, {"error": str(e)}


class PayPalPaymentProvider(PaymentProvider):
    def __init__(self):
        self.client_id = settings.PAYPAL_CLIENT_ID
        self.client_secret = settings.PAYPAL_CLIENT_SECRET

        # @TODO - In a real implementation, we would import and use the PayPal SDK here

    def process_payment(
        self, amount: Money, order_id: str, **kwargs
    ) -> tuple[bool, dict[str, Any]]:
        try:
            logger.info(
                "Processing PayPal payment",
                extra={
                    "amount": str(amount.amount),
                    "currency": amount.currency,
                    "order_id": order_id,
                },
            )

            # Mock response for demonstration
            payment_data = {
                "payment_id": f"PP_{order_id}_mock",
                "status": PaymentStatus.COMPLETED,
                "amount": str(amount.amount),
                "currency": amount.currency,
                "provider": "paypal",
            }

            return True, payment_data

        except Exception as e:
            logger.error(
                f"PayPal payment processing failed: {e!s}",
                extra={"order_id": order_id, "error": str(e)},
            )
            return False, {"error": str(e)}

    def refund_payment(
        self, payment_id: str, amount: Money | None = None
    ) -> tuple[bool, dict[str, Any]]:
        try:
            logger.info(
                "Processing PayPal refund",
                extra={
                    "payment_id": payment_id,
                    "amount": str(amount.amount) if amount else "full",
                },
            )

            # Mock response
            refund_data = {
                "refund_id": f"PP_RE_{payment_id}_mock",
                "status": PaymentStatus.REFUNDED,
                "amount": str(amount.amount) if amount else "full refund",
                "payment_id": payment_id,
            }

            return True, refund_data

        except Exception as e:
            logger.error(
                f"PayPal refund failed: {e!s}",
                extra={"payment_id": payment_id, "error": str(e)},
            )
            return False, {"error": str(e)}

    def get_payment_status(
        self, payment_id: str
    ) -> tuple[PaymentStatus, dict[str, Any]]:
        try:
            logger.info(
                "Getting PayPal payment status",
                extra={"payment_id": payment_id},
            )

            # Mock response
            status = PaymentStatus.COMPLETED
            status_data = {
                "payment_id": payment_id,
                "raw_status": "COMPLETED",
                "provider": "paypal",
            }

            return status, status_data

        except Exception as e:
            logger.error(
                f"Failed to get PayPal payment status: {e!s}",
                extra={"payment_id": payment_id, "error": str(e)},
            )
            return PaymentStatus.FAILED, {"error": str(e)}


def get_payment_provider(provider_name: str) -> PaymentProvider:
    providers = {
        "stripe": StripePaymentProvider,
        "paypal": PayPalPaymentProvider,
    }

    provider_class = providers.get(provider_name.lower())
    if not provider_class:
        raise ValueError(f"Unknown payment provider: {provider_name}")

    return provider_class()
