package frontend

import (
	"testing"
	"time"
)

func TestNewDefaults(t *testing.T) {
	t.Setenv("ENV", "development")
	f := New()
	if f.SourceDir != "components" {
		t.Errorf("SourceDir = %q, want components", f.SourceDir)
	}
	if f.OutputDir != "views/static/scripts/gen" {
		t.Errorf("OutputDir = %q, want views/static/scripts/gen", f.OutputDir)
	}
	if !f.DevMode {
		t.Error("DevMode should be true when ENV != production")
	}
	close(f.hmrDone) // stop the hub goroutine
}

func TestNewProductionDisablesHMR(t *testing.T) {
	t.Setenv("ENV", "production")
	f := New()
	if f.DevMode {
		t.Error("DevMode should be false in production")
	}
	if f.hmrReload != nil {
		t.Error("HMR channels should be nil in production")
	}
}

func TestHMRHubBroadcastsReload(t *testing.T) {
	t.Setenv("ENV", "development")
	f := New()
	defer close(f.hmrDone)

	ch := make(chan struct{}, 1)
	f.hmrJoin <- ch // subscribe (unbuffered — returns once the hub has us)

	f.notifyClients() // trigger a reload
	select {
	case <-ch:
	case <-time.After(time.Second):
		t.Fatal("subscribed client did not receive reload signal")
	}

	f.hmrLeave <- ch  // unsubscribe (hub processes this before the next reload)
	f.notifyClients() // reload again — nobody should be listening
	select {
	case <-ch:
		t.Fatal("unsubscribed client still received a reload signal")
	case <-time.After(100 * time.Millisecond):
	}
}

func TestNotifyClientsProductionNoop(t *testing.T) {
	f := &Frontend{}  // no HMR channels
	f.notifyClients() // must not panic
}