package hub

import (
	"testing"
	"time"
)

func TestNew(t *testing.T) {
	h := New()
	if h == nil {
		t.Fatal("New returned nil")
	}
	if h.clients == nil {
		t.Error("clients map not initialized")
	}
	if h.broadcast == nil {
		t.Error("broadcast channel not initialized")
	}
	if h.stop == nil {
		t.Error("stop channel not initialized")
	}
}

func TestClientCount(t *testing.T) {
	h := New()
	go h.Run()
	defer h.Shutdown()

	if count := h.ClientCount(); count != 0 {
		t.Errorf("Expected 0 clients, got %d", count)
	}
}

func TestBroadcastChannel(t *testing.T) {
	h := New()
	go h.Run()
	defer h.Shutdown()

	select {
	case h.broadcast <- []byte("test"):
		// Channel is working
	case <-time.After(100 * time.Millisecond):
		t.Error("broadcast channel blocked")
	}
}

func TestShutdown(t *testing.T) {
	h := New()

	done := make(chan struct{})
	go func() {
		h.Run()
		close(done)
	}()

	// Ensure Run is processing before shutdown
	time.Sleep(10 * time.Millisecond)

	h.Shutdown()

	select {
	case <-done:
		// Hub.Run() returned successfully
	case <-time.After(1 * time.Second):
		t.Fatal("Hub.Run() did not return after Shutdown")
	}
}