import stripe
from decimal import Decimal


def handle_stripe_coupon(coupon_instance, stripe_secret_key):
    """
    Handles the creation or updating of a Stripe coupon.
    Returns True if successful, otherwise returns False.
    """
    try:
        stripe.api_key = stripe_secret_key

        # Prepare coupon data without setting the ID
        coupon_data = {
            "name": coupon_instance.title,
            "metadata": {
                "local_id": coupon_instance.id,
            },
            "redeem_by": int(coupon_instance.valid_to.timestamp()),
            "max_redemptions": (
                coupon_instance.max_redeems if coupon_instance.max_redeems > 0 else None
            ),
            "duration": "once",
        }

        if coupon_instance.discount_amount:
            coupon_data["amount_off"] = int(
                coupon_instance.discount_amount * Decimal(100)
            )  # Amount in cents/fils
            coupon_data["currency"] = "gbp"
        elif coupon_instance.discount_percentage:
            coupon_data["percent_off"] = float(coupon_instance.discount_percentage)

        # Creating a new Stripe coupon
        stripe_coupon = stripe.Coupon.create(**coupon_data)
        # Using the Stripe-generated ID for coupon_code and coupon_id
        coupon_instance.coupon_code = stripe_coupon.id
        coupon_instance.coupon_id = stripe_coupon.id

        # Saving the coupon instance after successful Stripe operation
        coupon_instance.save()
        return True, "Coupon successfully created."

    except Exception as e:
        error_message = f"Error creating Stripe coupon: {e}"
        print(error_message)
        return False, error_message