"""
Controller for offer selection endpoints.
"""
from flask import Blueprint, request, jsonify
from app.middleware import basic_auth_required
from app.models import SelectOffersRequest, SelectOffersResponse, Offer
import logging

# Configure logger
logger = logging.getLogger(__name__)

# Create blueprint
offers_bp = Blueprint('offers', __name__)

@offers_bp.route('/SelectOffer', methods=['POST'])
@basic_auth_required
def select_offer():
    """
    Endpoint to send the offer the customer selected to Simbrella.
    
    This method processes the customer's selected offer and returns detailed offer information.
    
    Returns:
        JSON response with detailed offer information
    """
    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 = ['requestId', 'transactionId', 'customerId', 'accountId', 
                          'msisdn', 'requestedAmount', '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 = SelectOffersRequest.from_dict(data)
        
        # Process offer selection (this would connect to the business logic)
        # For demonstration, we'll return a mock response
        
        # Create sample offers
        offers = [
            Offer(
                offerId="14451",
                productId=req.productid,
                amount=req.requestedAmount,
                upfrontPayment=req.requestedAmount * 0.1,  # 10% upfront
                interestRate=3.0,
                Interest=req.requestedAmount * 0.03,  # 3% interest
                ManagementRate=1.0,
                ManagementFee=req.requestedAmount * 0.01,  # 1% management fee
                InsuranceRate=1.0,
                InsuranceFee=req.requestedAmount * 0.01,  # 1% insurance
                VATRate=7.5,
                VATamount=(req.requestedAmount * 0.01) * 0.075,  # VAT on management fee
                recommendedRepaymentDates=["2023-04-30", "2023-05-30", "2023-06-29"],
                installmentAmount=req.requestedAmount * 1.05 / 3,  # Split into 3 payments with 5% total fees
                totalRepaymentAmount=req.requestedAmount * 1.05  # Total with 5% fees
            )
        ]
        
        # Create response
        response = SelectOffersResponse(
            requestId=req.requestId,
            transactionId=req.transactionId,
            customerId=req.customerId,
            accountId=req.accountId,
            offers=[offer.to_dict() for offer in offers],
            resultCode="00",
            resultDescription="Successful",
            outstandingDebtAmount=0.0
        )
        
        logger.info(f"Processed offer selection for customer {req.customerId}")
        return jsonify(response.to_dict())
    
    except Exception as e:
        logger.error(f"Error processing offer selection: {str(e)}")
        return jsonify({
            'resultCode': '500',
            'resultDescription': 'Internal server error'
        }), 500