package telemetry

import (
	"bytes"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestHTTPMiddlewareRecoversPanic(t *testing.T) {
	var buf bytes.Buffer
	logger := slog.New(slog.NewJSONHandler(&buf, nil))

	handler := HTTPMiddleware(logger, http.HandlerFunc(func(http.ResponseWriter, *http.Request) {
		panic("test panic")
	}))

	req := httptest.NewRequest(http.MethodGet, "/boom", nil)
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, req)

	if rec.Code != http.StatusInternalServerError {
		t.Fatalf("status = %d", rec.Code)
	}
	if !strings.Contains(buf.String(), "panic recovered") {
		t.Fatalf("expected panic log, got %q", buf.String())
	}
}

func TestHTTPMiddlewareSkipsHealthChecks(t *testing.T) {
	var buf bytes.Buffer
	logger := slog.New(slog.NewJSONHandler(&buf, nil))

	handler := HTTPMiddleware(logger, http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusOK)
	}))

	req := httptest.NewRequest(http.MethodGet, "/healthz", nil)
	rec := httptest.NewRecorder()
	handler.ServeHTTP(rec, req)

	if buf.Len() != 0 {
		t.Fatalf("expected no access log for /healthz, got %q", buf.String())
	}
}