import requests
import logging
from django.conf import settings

logger = logging.getLogger(__name__)

class ThawaniClient:
    def __init__(self):
        self.secret_key = getattr(settings, 'THAWANI_SECRET_KEY', '')
        self.publishable_key = getattr(settings, 'THAWANI_PUBLISHABLE_KEY', '')
        self.base_url = getattr(settings, 'THAWANI_BASE_URL', 'https://uatcheckout.thawani.om')
        self.headers = {
            'thawani-api-key': self.secret_key,
            'Content-Type': 'application/json'
        }

    def create_checkout_session(self, payload):
        """
        Create a checkout session with Thawani.
        Payload should include: client_reference_id, products, success_url, cancel_url, metadata.
        """
        url = f"{self.base_url}/api/v1/checkout/session"
        try:
            response = requests.post(url, json=payload, headers=self.headers)
            response.raise_for_status()
            return response.json()
        except requests.exceptions.RequestException as e:
            logger.error(f"Thawani session creation failed: {e}")
            if hasattr(e, 'response') and e.response:
                logger.error(f"Thawani error response: {e.response.text}")
            return None

    def get_checkout_session(self, session_id):
        """
        Retrieve a checkout session to check its status.
        """
        url = f"{self.base_url}/api/v1/checkout/session/{session_id}"
        try:
            response = requests.get(url, headers=self.headers)
            response.raise_for_status()
            return response.json()
        except requests.exceptions.RequestException as e:
            logger.error(f"Thawani session retrieval failed: {e}")
            return None

    def get_payment_url(self, session_id):
        """
        Construct the payment URL to redirect the user.
        """
        return f"{self.base_url}/pay/{session_id}?key={self.publishable_key}"
