package handler

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"vctp/internal/settings"
)

func newLegacyGateHandler(enabled bool) *Handler {
	cfg := &settings.Settings{Values: &settings.SettingsYML{}}
	cfg.Values.Settings.EnableLegacyAPI = enabled
	return &Handler{
		Logger:   newTestLogger(),
		Settings: cfg,
	}
}

func TestDenyLegacyAPIDisabledByDefault(t *testing.T) {
	h := newLegacyGateHandler(false)
	rr := httptest.NewRecorder()

	denied := h.denyLegacyAPI(rr, "/api/event/vm/create")
	if !denied {
		t.Fatal("expected legacy API to be denied by default")
	}
	if rr.Code != http.StatusGone {
		t.Fatalf("expected %d, got %d", http.StatusGone, rr.Code)
	}
	if !strings.Contains(rr.Body.String(), "deprecated") {
		t.Fatalf("unexpected response body: %s", rr.Body.String())
	}
}

func TestDenyLegacyAPIEnabledViaSettings(t *testing.T) {
	h := newLegacyGateHandler(true)
	rr := httptest.NewRecorder()

	denied := h.denyLegacyAPI(rr, "/api/event/vm/create")
	if denied {
		t.Fatal("expected legacy API to be allowed when setting is enabled")
	}
	if rr.Body.Len() != 0 {
		t.Fatalf("expected no response body write, got: %s", rr.Body.String())
	}
}

func TestVmCreateEventHonorsLegacyGate(t *testing.T) {
	t.Run("disabled", func(t *testing.T) {
		h := newLegacyGateHandler(false)
		req := httptest.NewRequest(http.MethodPost, "/api/event/vm/create", strings.NewReader("{invalid"))
		rr := httptest.NewRecorder()
		h.VmCreateEvent(rr, req)
		if rr.Code != http.StatusGone {
			t.Fatalf("expected %d, got %d", http.StatusGone, rr.Code)
		}
	})

	t.Run("enabled", func(t *testing.T) {
		h := newLegacyGateHandler(true)
		req := httptest.NewRequest(http.MethodPost, "/api/event/vm/create", strings.NewReader("{invalid"))
		rr := httptest.NewRecorder()
		h.VmCreateEvent(rr, req)
		if rr.Code != http.StatusBadRequest {
			t.Fatalf("expected %d when gate is open, got %d", http.StatusBadRequest, rr.Code)
		}
	})
}

func TestLegacyInventoryEndpointsAreGatedWhenDisabled(t *testing.T) {
	h := newLegacyGateHandler(false)

	cases := []struct {
		name   string
		method string
		path   string
		body   string
		call   func(*Handler, *httptest.ResponseRecorder, *http.Request)
	}{
		{
			name:   "import vm",
			method: http.MethodPost,
			path:   "/api/import/vm",
			body:   `{"name":"vm1"}`,
			call:   func(h *Handler, rr *httptest.ResponseRecorder, req *http.Request) { h.VmImport(rr, req) },
		},
		{
			name:   "cleanup vm",
			method: http.MethodDelete,
			path:   "/api/inventory/vm/delete?vm_id=vm-1&datacenter_name=dc1",
			call:   func(h *Handler, rr *httptest.ResponseRecorder, req *http.Request) { h.VmCleanup(rr, req) },
		},
		{
			name:   "update vm details",
			method: http.MethodPost,
			path:   "/api/inventory/vm/update",
			call:   func(h *Handler, rr *httptest.ResponseRecorder, req *http.Request) { h.VmUpdateDetails(rr, req) },
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			req := httptest.NewRequest(tc.method, tc.path, strings.NewReader(tc.body))
			rr := httptest.NewRecorder()
			tc.call(h, rr, req)
			if rr.Code != http.StatusGone {
				t.Fatalf("expected %d, got %d", http.StatusGone, rr.Code)
			}
			if !strings.Contains(rr.Body.String(), "deprecated") {
				t.Fatalf("expected deprecated response, got: %s", rr.Body.String())
			}
		})
	}
}