package app

import "testing"

func TestNormalizeTransportIfaceID(t *testing.T) {
	cases := []struct {
		in   string
		want string
	}{
		{"", transportDefaultIfaceID},
		{"   ", transportDefaultIfaceID},
		{"Shared", "shared"},
		{"sb Main", "sb-main"},
	}
	for _, tc := range cases {
		if got := normalizeTransportIfaceID(tc.in); got != tc.want {
			t.Fatalf("normalizeTransportIfaceID(%q)=%q want=%q", tc.in, got, tc.want)
		}
	}
}

func TestNormalizeTransportInterfacesStateAddsSharedAndClientIfaceIDs(t *testing.T) {
	st := transportInterfacesState{
		Version: transportStateVersion,
		Items: []TransportInterface{
			{ID: "edge-eu", Name: "", Mode: ""},
		},
	}
	clients := []TransportClient{
		{ID: "c1", IfaceID: ""},
		{ID: "c2", IfaceID: "lab-net"},
	}
	norm, changed := normalizeTransportInterfacesState(st, clients)
	if !changed {
		t.Fatalf("expected normalization changes")
	}
	if len(norm.Items) != 3 {
		t.Fatalf("expected 3 interfaces, got %d", len(norm.Items))
	}
	want := map[string]TransportInterfaceMode{
		"edge-eu":               TransportInterfaceModeDedicated,
		transportDefaultIfaceID: TransportInterfaceModeShared,
		"lab-net":               TransportInterfaceModeDedicated,
	}
	wantTable := map[string]string{
		"edge-eu":               "agvpn_if_edge_eu",
		transportDefaultIfaceID: "",
		"lab-net":               "agvpn_if_lab_net",
	}
	for _, it := range norm.Items {
		mode, ok := want[it.ID]
		if !ok {
			t.Fatalf("unexpected interface id %q", it.ID)
		}
		if it.Mode != mode {
			t.Fatalf("interface %q mode=%q want=%q", it.ID, it.Mode, mode)
		}
		if it.Name == "" {
			t.Fatalf("interface %q has empty name", it.ID)
		}
		if got := it.RoutingTable; got != wantTable[it.ID] {
			t.Fatalf("interface %q routing_table=%q want=%q", it.ID, got, wantTable[it.ID])
		}
		delete(want, it.ID)
	}
	if len(want) != 0 {
		t.Fatalf("missing interfaces: %#v", want)
	}
}

func TestBuildTransportInterfaceItemsAggregatesClients(t *testing.T) {
	ifaces := []TransportInterface{
		{ID: transportDefaultIfaceID, Name: "Shared interface", Mode: TransportInterfaceModeShared},
		{ID: "lab-net", Name: "Lab net", Mode: TransportInterfaceModeDedicated, RoutingTable: "agvpn_if_lab_net"},
	}
	clients := []TransportClient{
		{ID: "c-up-1", IfaceID: "lab-net", Status: TransportClientUp},
		{ID: "c-down", IfaceID: "lab-net", Status: TransportClientDown},
		{ID: "c-up-2", IfaceID: "", Status: TransportClientUp},
	}

	items := buildTransportInterfaceItems(ifaces, clients)
	if len(items) != 2 {
		t.Fatalf("expected 2 items, got %d", len(items))
	}
	if items[0].ID != "lab-net" {
		t.Fatalf("expected first item lab-net, got %q", items[0].ID)
	}
	if items[0].ClientCount != 2 || items[0].UpCount != 1 {
		t.Fatalf("unexpected lab-net counters: %#v", items[0])
	}
	if items[0].RoutingTable != "agvpn_if_lab_net" {
		t.Fatalf("unexpected lab-net routing_table: %q", items[0].RoutingTable)
	}
	if items[1].ID != transportDefaultIfaceID {
		t.Fatalf("expected second item shared, got %q", items[1].ID)
	}
	if items[1].ClientCount != 1 || items[1].UpCount != 1 {
		t.Fatalf("unexpected shared counters: %#v", items[1])
	}
}

func TestAppendTransportVirtualInterfaceItemsAddsAdGuardRow(t *testing.T) {
	items := []TransportInterfaceItem{
		{ID: transportDefaultIfaceID, Name: "Shared interface", Mode: TransportInterfaceModeShared, ClientCount: 2, UpCount: 1},
	}
	virtual := []TransportClient{{
		ID:           transportPolicyTargetAdGuardID,
		Name:         "AdGuard VPN",
		Kind:         TransportClientKind(transportPolicyTargetAdGuardID),
		IfaceID:      transportPolicyTargetAdGuardIfaceID,
		Iface:        "tun0",
		RoutingTable: transportPolicyTargetAdGuardTable,
		Status:       TransportClientUp,
		UpdatedAt:    "2026-03-22T00:00:00Z",
	}}

	out := appendTransportVirtualInterfaceItems(items, virtual)
	if len(out) != 2 {
		t.Fatalf("expected 2 rows with virtual item, got %d", len(out))
	}
	var adg *TransportInterfaceItem
	var shared *TransportInterfaceItem
	for i := range out {
		if out[i].ID == transportPolicyTargetAdGuardID {
			adg = &out[i]
		}
		if out[i].ID == transportDefaultIfaceID {
			shared = &out[i]
		}
	}
	if adg == nil {
		t.Fatalf("missing adguard virtual row")
	}
	if adg.ClientCount != 1 || adg.UpCount != 1 {
		t.Fatalf("unexpected adguard counters: %#v", *adg)
	}
	if adg.RoutingTable != transportPolicyTargetAdGuardTable {
		t.Fatalf("unexpected adguard routing table: %q", adg.RoutingTable)
	}
	if shared == nil || shared.ClientCount != 2 || shared.UpCount != 1 {
		t.Fatalf("shared row was modified unexpectedly: %#v", shared)
	}
}