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


class LoanStatusService(BaseService):
    TRANSACTION_TYPE = TransactionType.LOAN_STATUS 

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

        Args:
            data (dict): The request data.

        Returns:
            dict: A standardized response.
        """
        try:
            validated_data = LoanStatusService.validate_data(data, LoanStatusSchema())
            customer_id =  validated_data.get('customerId')
            customer = LoanStatusService.get_or_create_customer(validated_data)
            account = customer.accounts[0]

            if (LoanStatusService.validate_account_ownership(account_id = account.id, customer_id = customer_id)):
                transaction = LoanStatusService.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
           

            loans = [
                {
                    "debtId": "123456789",
                    "loanDate": "2019-10-18 14:26:21.063",
                    "dueDate": "2019-11-20 14:26:21.063",
                    "currentLoanAmount": 8500,
                    "initialLoanAmount": 10000,
                    "defaultPenaltyFee": 0,
                    "continuousFee": 0,
                    "productId": "101"
                }
            ]

            # Simulated processing logic
            response_data = {
                "customerId": "CN621868",
                "transactionId": "Tr201712RK9232P115",
                "loans": loans,
                "totalDebtAmount": 8500,
                "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