package gift

import (
	"context"
	"errors"
	"testing"
)

type sendRepoStub struct {
	Repo
	called bool
}

func (r *sendRepoStub) Send(_ context.Context, userID, roomID, giftID uint, quantity int) (*Send, error) {
	r.called = true
	return &Send{UserID: userID, RoomID: &roomID, GiftID: &giftID, Quantity: quantity}, nil
}

type availabilityStub struct {
	live bool
	err  error
}

func (s availabilityStub) IsLive(context.Context, uint) (bool, error) { return s.live, s.err }

func TestSendRejectsOfflineRoomBeforeWalletMutation(t *testing.T) {
	repo := &sendRepoStub{}
	uc := newUsecase(repo, nil, availabilityStub{live: false})

	if _, err := uc.Send(context.Background(), 1, 7, 3, 2); !errors.Is(err, ErrSendNotAllowed) {
		t.Fatalf("offline send error = %v", err)
	}
	if repo.called {
		t.Fatal("offline room reached gift repository")
	}
}

func TestSendAcceptsCustomQuantityForLiveRoom(t *testing.T) {
	repo := &sendRepoStub{}
	uc := newUsecase(repo, nil, availabilityStub{live: true})

	item, err := uc.Send(context.Background(), 1, 7, 3, 37)
	if err != nil {
		t.Fatal(err)
	}
	if !repo.called || item.Quantity != 37 {
		t.Fatalf("custom quantity result = %+v called=%v", item, repo.called)
	}
}