from flask import request, jsonify
from marshmallow import ValidationError
from app.utils.logger import logger
from app.api.schemas.repayment import RepaymentSchema, RepaymentResponseSchema


class RepaymentService:
    @staticmethod
    def process_request(data):
        """
        Process the Repayment request.

        Args:
            data (dict): The request data.

        Returns:
            dict: A standardized response.
        """
        try:
            logger.info("Processing Repayment request")

            # Validate input data using RepaymentSchema
            schema = RepaymentSchema()
            validated_data = schema.load(data)  # Raises ValidationError if invalid

            # Simulated processing logic
            # In a real implementation, this would interact with your business logic
            # to process the repayment

            # For demonstration, we'll simulate a partial repayment
            collected_amount = validated_data.get('collectedAmount') * 0.75  # 75% of requested amount
            lien_amount = validated_data.get('lienAmount') * 0.25  # 25% of requested amount as lien

            response_data = {
                "requestId": validated_data.get('requestId'),
                "countryCode": validated_data.get('countryCode'),
                "transactionId": validated_data.get('transactionId'),
                "debtId": validated_data.get('debtId'),
                "customerId": validated_data.get('customerId'),
                "accountId": validated_data.get('accountId'),
                "productId": validated_data.get('productId'),
                "collectedAmount": collected_amount,
                "penalCharge": validated_data.get('penalCharge', 0),
                "lienAmount": lien_amount,
                "comment": validated_data.get('comment', ""),
                "resultCode": "00",
                "resultDescription": "Loan Collection Successful"
            }

            # Validate the response using the response schema
            response_schema = RepaymentResponseSchema()
            validated_response = response_schema.dump(response_data)

            return jsonify(validated_response)

        except ValidationError as err:
            logger.error(f"Validation Error: {err.messages}")
            return jsonify({
                "resultCode": "01",
                "resultDescription": f"Validation error: {err.messages}"
            }), 422

        except Exception as e:
            logger.error(f"An error occurred: {str(e)}", exc_info=True)
            return jsonify({
                "resultCode": "08",
                "resultDescription": f"Error occurred: {str(e)}"
            }), 500