from flask import request, jsonify
from marshmallow import ValidationError
from app.utils.logger import logger
from app.api.schemas.bulk_sms import BulkSMSSchema, BulkSMSResponseSchema


class BulkSMSService:
    @staticmethod
    def process_request(data):
        """
        Process the BulkSMS request.

        Args:
            data (list): The request data as a list of SMS items.

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

            # Check if the data is a list and not too large
            if not isinstance(data, list):
                return jsonify({
                    "data": "",
                    "statusCode": 400,
                    "IsSuccessful": False,
                    "errorMessage": "Request must be a list of SMS items"
                }), 400

            if len(data) > 20:
                return jsonify({
                    "data": "",
                    "statusCode": 400,
                    "IsSuccessful": False,
                    "errorMessage": "Maximum of 20 SMS items allowed"
                }), 400

            # Validate each item in the list
            schema = BulkSMSSchema()
            # We need to wrap the list in a dictionary with a key that matches the schema field name
            validated_data = schema.load({"_schema": data})  # Raises ValidationError if invalid

            # Simulated processing logic
            # In a real implementation, this would interact with your business logic
            # to send bulk SMS messages to customers

            # For demonstration, we'll simulate a successful bulk SMS send
            response_data = {
                "data": "",
                "statusCode": 200,
                "IsSuccessful": True,
                "errorMessage": None
            }

            # Validate the response using the response schema
            response_schema = BulkSMSResponseSchema()
            validated_response = response_schema.dump(response_data)

            return jsonify(validated_response)

        except ValidationError as err:
            logger.error(f"Validation Error: {err.messages}")
            return jsonify({
                "data": "",
                "statusCode": 400,
                "IsSuccessful": False,
                "errorMessage": f"Validation error: {err.messages}"
            }), 400

        except Exception as e:
            logger.error(f"An error occurred: {str(e)}", exc_info=True)
            return jsonify({
                "data": "",
                "statusCode": 500,
                "IsSuccessful": False,
                "errorMessage": f"Error occurred: {str(e)}"
            }), 500