package main

import (
	"errors"
	"net/http"
	"testing"
	"time"

	"github.com/tinode/chat/server/store/types"
)

func TestClusterReqShardIsStablePerTenantTopic(t *testing.T) {
	req := &ClusterReq{TenantID: types.TenantID(6), RcptTo: "p2p-topic"}
	want := clusterReqShard(req, 16)
	for i := 0; i < 100; i++ {
		if got := clusterReqShard(req, 16); got != want {
			t.Fatalf("unstable shard: got=%d want=%d", got, want)
		}
	}
	if got := clusterReqShard(req, 1); got != 0 {
		t.Fatalf("single worker shard=%d", got)
	}
}

func TestClusterRouteErrorReplySeparatesOverloadFromDisconnect(t *testing.T) {
	msg := &ClientComMessage{Id: "test", Timestamp: time.Now()}
	overload := clusterRouteErrorReply(msg, errClusterLoadExceeded)
	if overload.Ctrl == nil || overload.Ctrl.Code != http.StatusServiceUnavailable || overload.Ctrl.Text != "cluster overloaded" {
		t.Fatalf("unexpected overload reply: %+v", overload.Ctrl)
	}
	disconnected := clusterRouteErrorReply(msg, errors.New("disconnected"))
	if disconnected.Ctrl == nil || disconnected.Ctrl.Code != http.StatusBadGateway {
		t.Fatalf("unexpected disconnected reply: %+v", disconnected.Ctrl)
	}
}