package grpc

import (
	"context"
	"testing"
	"time"

	roomv1 "hyapp.local/api/proto/room/v1"
	walletv1 "hyapp.local/api/proto/wallet/v1"
	"hyapp/pkg/xerr"
	"hyapp/services/room-service/internal/integration"
	roomservice "hyapp/services/room-service/internal/room/service"
	"hyapp/services/room-service/internal/router"
	"hyapp/services/room-service/internal/testutil/mysqltest"

	"google.golang.org/grpc/codes"
	grpcstatus "google.golang.org/grpc/status"
)

// fakeWallet 只满足 room-service 构造依赖；本测试走参数校验失败分支，不触发扣费。
type fakeWallet struct{}

// DebitGift 返回固定结果，避免 transport 测试依赖 wallet-service 进程。
func (fakeWallet) DebitGift(context.Context, *walletv1.DebitGiftRequest) (*walletv1.DebitGiftResponse, error) {
	return &walletv1.DebitGiftResponse{BillingReceiptId: "receipt-test"}, nil
}

// newTransportTestServer 构造完整领域服务，确保测试覆盖真实 service -> transport 错误边界。
func newTransportTestServer(t *testing.T) *Server {
	t.Helper()

	svc := roomservice.New(roomservice.Config{
		NodeID:         "node-transport-test",
		LeaseTTL:       10 * time.Second,
		RankLimit:      20,
		SnapshotEveryN: 1,
	}, router.NewMemoryDirectory(), mysqltest.NewRepository(t), fakeWallet{}, integration.NewNoopRoomEventPublisher(), integration.NewNoopOutboxPublisher())

	return NewServer(svc)
}

func TestCreateRoomMapsDomainErrorToGRPCReason(t *testing.T) {
	server := newTransportTestServer(t)

	_, err := server.CreateRoom(context.Background(), &roomv1.CreateRoomRequest{
		// room_id 缺失属于客户端参数错误，不能在 gRPC 边界丢失 reason 后变成 INTERNAL_ERROR。
		SeatCount: 8,
		Mode:      "voice",
	})
	if err == nil {
		t.Fatalf("CreateRoom without room_id should fail")
	}

	if got := grpcstatus.Code(err); got != codes.InvalidArgument {
		t.Fatalf("gRPC code mismatch: got %s", got)
	}
	if got := xerr.ReasonFromGRPC(err); got != xerr.InvalidArgument {
		t.Fatalf("reason mismatch: got %s", got)
	}
	if message := grpcstatus.Convert(err).Message(); message != "room_id is required" {
		t.Fatalf("message mismatch: got %q", message)
	}
}