package metrics

import (
	"context"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"
)

func TestMetricsHandlerExportsOnlyAggregateGatewayState(t *testing.T) {
	ObserveSubmit(true, 20*time.Millisecond)
	request := httptest.NewRequest(http.MethodGet, "/metrics", nil)
	response := httptest.NewRecorder()
	Handler(func(context.Context) Snapshot {
		return Snapshot{UpstreamDesired: 2, UpstreamConnected: 1, DownstreamConnected: 3, SubmitWorkerUp: true, QueueAvailable: true, QueuePending: 4, QueueLag: 5, QueueOldestAgeSeconds: 12}
	}).ServeHTTP(response, request)

	body := response.Body.String()
	if response.Code != http.StatusOK || !strings.Contains(body, "cmpp_gateway_submit_queue_pending 4") || !strings.Contains(body, "cmpp_gateway_upstream_connections{state=\"connected\"} 1") {
		t.Fatalf("unexpected metrics response: code=%d body=%s", response.Code, body)
	}
	for _, forbidden := range []string{"phone_number", "message_id", "channel_id"} {
		if strings.Contains(body, forbidden) {
			t.Fatalf("metrics expose forbidden label %q", forbidden)
		}
	}
}