import requests
import logging

class ApprovePullRequest:
    def __init__(self, base_url, token, repo):
        self.base_url = base_url
        self.headers = {
            "Authorization": f"token {token}",
            "Accept": "application/vnd.github.v3+json"
        }
        self.repo = repo

        # Set up logging
        self.logger = logging.getLogger(__name__)
        self.logger.setLevel(logging.INFO)
        
        # Create a file handler
        file_handler = logging.FileHandler('approve_pull_request.log')
        file_handler.setLevel(logging.INFO)
        
        # Create a console handler
        console_handler = logging.StreamHandler()
        console_handler.setLevel(logging.INFO)
        
        # Create a formatting for the logs
        formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
        file_handler.setFormatter(formatter)
        console_handler.setFormatter(formatter)
        
        # Add the handlers to the logger
        self.logger.addHandler(file_handler)
        self.logger.addHandler(console_handler)

    def __call__(self, pull_number):
        self.logger.info(f"Approving pull request: {pull_number}")
        url = f"{self.base_url}/repos/{self.repo}/pulls/{pull_number}/reviews"
        data = {
            "event": "APPROVE"
        }
        response = requests.post(url, headers=self.headers, json=data)
        if response.status_code == 200:
            success_message = f"Pull request {pull_number} approved successfully"
            self.logger.info(success_message)
            return success_message
        else:
            error_message = f"Error approving pull request: {response.status_code}\nResponse: {response.text}"
            self.logger.error(error_message)
            return error_message

# JSON definition for the approve_pull_request function
approve_pull_request_definition = {
    "name": "approve_pull_request",
    "description": "Approve a pull request",
    "parameters": {
        "type": "object",
        "properties": {
            "pull_number": {
                "type": "integer",
                "description": "The number of the pull request"
            }
        },
        "required": ["pull_number"]
    }
}