from flask import request, jsonify
from marshmallow import ValidationError
from app.api.services.base_service import BaseService
from app.api.enums import TransactionType   
from app.utils.logger import logger
from app.api.schemas.select_offer import SelectOfferSchema

class SelectOfferService(BaseService):
    TRANSACTION_TYPE = TransactionType.SELECT_OFFER 

    @staticmethod
    def process_request(data):
        """
        Process the SelectOffer request.

        Args:
            data (dict): The request data.

        Returns:
            dict: A standardized response.
        """
        try:
            validated_data = SelectOfferService.validate_data(data, SelectOfferSchema())
            account_id = validated_data.get('accountId')
            customer_id =  validated_data.get('customerId')

            if (SelectOfferService.validate_account_ownership(account_id = account_id, customer_id = customer_id)):
                transaction = SelectOfferService.log_transaction(validated_data = validated_data)

                if not transaction:
                    logger.error(f"Failed to log transaction")
                    return jsonify({
                        "message": "Failed to log transaction."
                    }), 400
            else: 
                return jsonify({
                        "message": "Invalid Customer or Account"
                    }), 400
         
            offers = [
                    {
                    "offerId": "14451",
                    "productId": "2030",
                    "amount": 10000.0,
                    "upfrontPayment": 1000.0,
                    "interestRate": 3.0,
                    "managementRate": 1.0,
                    "managementFee": 1.0,
                    "insuranceRate": 1.0,
                    "insuranceFee": 100.0,
                    "VATRate": 7.5,
                    "VATAmount": 100.0,
                    "recommendedRepaymentDates": ["2022-11-30"],
                    "installmentAmount": 11000.0,
                    "totalRepaymentAmount": 11000.0
                    }
                ]

            # Business logic - selecting an offer
            response_data = {
                "outstandingDebtAmount": 0,
                "requestId": "202111170001371256908",
                "transactionId": transaction.id,
                "customerId": customer_id,
                "accountId": account_id,
                "loan": offers,
                "resultCode": "00",
                "resultDescription": "Successful"
                }


            return response_data

        except ValidationError as err:

            logger.error(f"Validation Error: {getattr(err, 'messages', str(err))}")

            return jsonify({
                "message": "Validation exception"
                }) , 422
        
        except  ValueError as err:
            logger.error(f"{getattr(err, 'messages', str(err))}")

            return jsonify({
                "message": str(err)
                }) , 400

        except Exception as e:
            logger.error(f"An error occurred: {str(e)}", exc_info=True)
            return jsonify({
                "message": "Internal Server Error"
                }) , 500