package metrics

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

func TestRegistrySnapshotAndTextFormat(t *testing.T) {
	r := New()
	r.SetDirtyRows(7)
	r.IncAttempts()
	r.IncAttempts()
	r.IncAttempts()
	r.IncFailures()
	r.IncIdempotentNoopHits()

	snap := r.Snapshot()
	if snap.DirtyRows != 7 || snap.ReconciliationAttempts != 3 || snap.ReconciliationFailures != 1 || snap.IdempotentNoopHits != 1 {
		t.Fatalf("unexpected snapshot: %+v", snap)
	}

	req := httptest.NewRequest("GET", "/metrics", nil)
	w := httptest.NewRecorder()
	r.Handler().ServeHTTP(w, req)
	body := w.Body.String()
	for _, substr := range []string{
		"attest_reconciler_dirty_rows_total 7",
		"attest_reconciler_reconciliation_attempts_total 3",
		"attest_reconciler_reconciliation_failures_total 1",
		"attest_reconciler_idempotent_noop_total 1",
		"# TYPE attest_reconciler_dirty_rows_total gauge",
	} {
		if !strings.Contains(body, substr) {
			t.Errorf("metrics output missing %q:\n%s", substr, body)
		}
	}
}