package adapter;

/**
 * The Adapter — bridges StripeClient (Adaptee) to PaymentGateway (Target).
 *
 * This is the Object Adapter variant: it holds a StripeClient instance
 * via composition (not inheritance), so it can adapt any StripeClient
 * including subclasses.
 *
 * The key responsibility: translate YOUR interface's methods into
 * calls that Stripe understands — data conversion included.
 */
public class StripePaymentAdapter implements PaymentGateway {

    private final StripeClient stripe;

    public StripePaymentAdapter(StripeClient stripe) {
        this.stripe = stripe;
    }

    @Override
    public boolean charge(String customerId, double amount, String currency) {
        // Translation: your code uses decimal dollars; Stripe wants integer cents
        long amountInCents = Math.round(amount * 100);
        StripeClient.StripeChargeResult result =
                stripe.createCharge(customerId, amountInCents, currency.toLowerCase());
        return result.success;
    }

    @Override
    public boolean refund(String transactionId, double amount) {
        // Translation: your "transactionId" is Stripe's "chargeId"
        long amountInCents = Math.round(amount * 100);
        return stripe.issueRefund(transactionId, amountInCents);
    }

    @Override
    public String getStatus(String transactionId) {
        // Translation: map Stripe's object to your simple status string
        StripeClient.StripeChargeResult result = stripe.retrieveCharge(transactionId);
        if (!result.success) return "FAILED";
        return result.status != null ? result.status.toUpperCase() : "UNKNOWN";
    }
}