package metrics

import (
	"io"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestNew(t *testing.T) {
	m := New("1.2.3")

	// Gather all metrics and check expected names exist.
	families, err := m.registry.Gather()
	if err != nil {
		t.Fatalf("gather: %v", err)
	}

	want := map[string]bool{
		"oubliette_ssh_connections_total":    false,
		"oubliette_ssh_connections_active":   false,
		"oubliette_auth_attempts_total":      false,
		"oubliette_sessions_total":           false,
		"oubliette_sessions_active":          false,
		"oubliette_session_duration_seconds": false,
		"oubliette_build_info":               false,
	}

	for _, f := range families {
		if _, ok := want[f.GetName()]; ok {
			want[f.GetName()] = true
		}
	}

	for name, found := range want {
		if !found {
			t.Errorf("metric %q not registered", name)
		}
	}
}

func TestHandler(t *testing.T) {
	m := New("1.2.3")

	req := httptest.NewRequest(http.MethodGet, "/metrics", nil)
	w := httptest.NewRecorder()
	m.Handler().ServeHTTP(w, req)

	if w.Code != http.StatusOK {
		t.Errorf("status = %d, want 200", w.Code)
	}

	body, err := io.ReadAll(w.Body)
	if err != nil {
		t.Fatalf("reading body: %v", err)
	}

	if !strings.Contains(string(body), `oubliette_build_info{version="1.2.3"} 1`) {
		t.Errorf("response should contain build_info metric, got:\n%s", body)
	}
}