"""
Controller for repayment endpoints.
"""
from flask import Blueprint, request, jsonify
from api.middleware import basic_auth_required
from api.models import RepaymentRequest, RepaymentResponse
import logging

# Configure logger
logger = logging.getLogger(__name__)

# Create blueprint
repayment_bp = Blueprint('repayment', __name__)

@repayment_bp.route('/Repayment', methods=['POST'])
@basic_auth_required
def repayment():
    """
    Endpoint to process loan repayment requests.
    
    This method handles customer repayment of loans.
    
    Returns:
        JSON response with repayment status
    """
    try:
        # Parse and validate request
        data = request.get_json()
        if not data:
            return jsonify({
                'resultCode': '400',
                'resultDescription': 'Invalid JSON payload'
            }), 400
        
        # Validate required fields
        required_fields = ['$type', 'transactionId', 'customerId', 'debtId', 
                          'productId', 'channel']
        for field in required_fields:
            if field not in data:
                return jsonify({
                    'resultCode': '422',
                    'resultDescription': f'Missing required field: {field}'
                }), 422
        
        # Create request model
        req = RepaymentRequest.from_dict(data)
        
        # Process repayment request (this would connect to the business logic)
        # For demonstration, we'll return a mock response
        
        # Create response
        response = RepaymentResponse(
            customerId=req.customerId,
            productId=req.productId,
            debtId=req.debtId,
            resultCode="00",
            resultDescription="Repayment processed successfully"
        )
        
        logger.info(f"Processed repayment for customer {req.customerId}, debt {req.debtId}")
        return jsonify(response.to_dict())
    
    except Exception as e:
        logger.error(f"Error processing repayment: {str(e)}")
        return jsonify({
            'resultCode': '500',
            'resultDescription': 'Internal server error'
        }), 500