import requests
import time
import os
# Load environment variables from .env file

class DeviceFlowAuthenticator:
    def __init__(self):
        self.client_id = "cybershuttle-agent"
        self.realm = "default"
        self.auth_server_url = "https://auth.cybershuttle.org"

        if not self.client_id or not self.realm or not self.auth_server_url:
            raise ValueError("Missing required environment variables for client ID, realm, or auth server URL")

        self.device_code = None
        self.interval = None

    def login(self):
        # Step 1: Request device and user code
        auth_device_url = f"{self.auth_server_url}/realms/{self.realm}/protocol/openid-connect/auth/device"
        response = requests.post(auth_device_url, data={"client_id": self.client_id, "scope": "openid"})

        if response.status_code != 200:
            print(f"Error in device authorization request: {response.status_code} - {response.text}")
            return

        data = response.json()
        self.device_code = data.get("device_code")
        self.interval = data.get("interval", 5)

        print(f"User code: {data.get('user_code')}")
        print(f"Please authenticate by visiting: {data.get('verification_uri_complete')}")

        # Step 2: Poll for the token
        self.poll_for_token()

    def poll_for_token(self):
        assert self.interval is not None
        token_url = f"{self.auth_server_url}/realms/{self.realm}/protocol/openid-connect/token"
        while True:
            response = requests.post(token_url, data={
                "client_id": self.client_id,
                "grant_type": "urn:ietf:params:oauth:grant-type:device_code",
                "device_code": self.device_code
            })

            if response.status_code == 200:
                data = response.json()
                access_token = data.get("access_token")
                print(f"Received access token")
                os.environ['CS_ACCESS_TOKEN'] = access_token
                break
            elif response.status_code == 400 and response.json().get("error") == "authorization_pending":
                print("Authorization pending, retrying...")
            else:
                print(f"Error in token request: {response.status_code} - {response.text}")
                break

            time.sleep(self.interval)