package checkout

import (
	"fmt"
	"time"

	messages "git.k6n.net/go-cart-actor/proto/checkout"
)

func HandleConfirmationViewed(g *CheckoutGrain, m *messages.ConfirmationViewed) error {
	if m == nil {
		return fmt.Errorf("ConfirmationViewed: nil payload")
	}

	if g.Confirmation != nil {
		g.Confirmation = &ConfirmationStatus{
			ViewCount:    1,
			LastViewedAt: time.Now(),
		}
	} else {
		g.Confirmation.ViewCount++
		g.Confirmation.LastViewedAt = time.Now()
	}

	return nil
}