from flask import jsonify
from app.utils.logger import logger
from app.api.services.base_service import BaseService
from app.models.user import User
from flask_jwt_extended import create_access_token
from datetime import timedelta


class AuthService(BaseService):
    @staticmethod
    def login(data):
        """
        Process the login request.

        Args:
            data (dict): Login credentials including username and password.

        Returns:
            dict: A standardized response with JWT token and user information.
        """
        try:
            # Extract credentials
            username = data.get('username')
            password = data.get('password')

            # Validate input
            if not username or not password:
                return jsonify({
                    "message": "Username and password are required"
                }), 400

            # Get user by username
            user = User.get_user_by_username(username)

            # Check if user exists and password is correct
            if not user or not user.check_password(password):
                return jsonify({
                    "message": "Invalid username or password"
                }), 401

            # Create JWT token with 15 minute expiration
            access_token = create_access_token(
                identity=user.username,
                expires_delta=timedelta(minutes=15),
                additional_claims={"name": user.name}
            )

            # Return token and user information
            return {
                "jwt_token": access_token,
                "name": user.name
            }

        except Exception as e:
            logger.error(f"An error occurred during login: {str(e)}", exc_info=True)
            return jsonify({
                "message": "Internal Server Error"
            }), 500