from flask import request, jsonify
from marshmallow import ValidationError
from app.utils.logger import logger
from app.api.schemas.provide_loan import ProvideLoanSchema, ProvideLoanResponseSchema

class ProvideLoanService:
    @staticmethod
    def process_request(data):
        """
        Process the ProvideLoan request.

        Args:
            data (dict): The request data.

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

            # Validate input data using ProvideLoanSchema
            schema = ProvideLoanSchema()
            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 loan provision request
            response_data = {
                "requestId": validated_data.get('requestId', f"REQ-{validated_data.get('transactionId')}"),
                "transactionId": validated_data.get('transactionId'),
                "customerId": validated_data.get('customerId'),
                "accountId": validated_data.get('accountId'),
                "msisdn": validated_data.get('msisdn', ""),
                "resultCode": "00",
                "resultDescription": "Successful"
            }

            # Validate the response using the response schema
            response_schema = ProvideLoanResponseSchema()
            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