"""
Controller for SMS notification endpoints.
"""
from flask import Blueprint, request, jsonify
from api.middleware import api_key_required
from api.models import SMSRequest, SMSResponse
import logging

# Configure logger
logger = logging.getLogger(__name__)

# Create blueprint
sms_bp = Blueprint('sms', __name__)

@sms_bp.route('/SMS', methods=['POST'])
@api_key_required
def send_sms():
    """
    Endpoint to send SMS notifications.
    
    This method handles requests to send SMS messages to customers.
    
    Returns:
        JSON response with SMS sending 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 = ['text', 'dest', 'unicode']
        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 = SMSRequest.from_dict(data)
        
        # Process SMS request (this would connect to your business logic)
        # For demonstration, we'll return a mock response
        
        # Create response
        response = SMSResponse(
            data="",
            statusCode=200,
            IsSuccessful=True,
            errorMessage=None
        )
        
        logger.info(f"Processed SMS request to {req.dest}")
        return jsonify(response.to_dict())
    
    except Exception as e:
        logger.error(f"Error processing SMS request: {str(e)}")
        return jsonify({
            'resultCode': '500',
            'resultDescription': 'Internal server error'
        }), 500

@sms_bp.route('/BulkSMS', methods=['POST'])
@api_key_required
def send_bulk_sms():
    """
    Endpoint to send bulk SMS notifications.
    
    This method handles requests to send multiple SMS messages (up to 20)
    in a single request.
    
    Returns:
        JSON response with bulk SMS sending status
    """
    try:
        # Parse and validate request
        data = request.get_json()
        if not data:
            return jsonify({
                'resultCode': '400',
                'resultDescription': 'Invalid JSON payload'
            }), 400
        
        # Validate that data is an array
        if not isinstance(data, list):
            return jsonify({
                'resultCode': '422',
                'resultDescription': 'Request must be an array of SMS messages'
            }), 422
        
        # Validate array length
        if len(data) > 20:
            return jsonify({
                'resultCode': '422',
                'resultDescription': 'Maximum of 20 SMS messages allowed per request'
            }), 422
        
        # Validate each SMS in the array
        for i, sms in enumerate(data):
            required_fields = ['text', 'dest', 'unicode']
            for field in required_fields:
                if field not in sms:
                    return jsonify({
                        'resultCode': '422',
                        'resultDescription': f'Missing required field: {field} in SMS at index {i}'
                    }), 422
        
        # Process bulk SMS request (this would connect to the business logic)
        # For demonstration, we'll return a mock response
        
        # Create response
        response = SMSResponse(
            data="",
            statusCode=200,
            IsSuccessful=True,
            errorMessage=None
        )
        
        logger.info(f"Processed bulk SMS request with {len(data)} messages")
        return jsonify(response.to_dict())
    
    except Exception as e:
        logger.error(f"Error processing bulk SMS request: {str(e)}")
        return jsonify({
            'resultCode': '500',
            'resultDescription': 'Internal server error'
        }), 500