package handlers

import (
	"fmt"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"sneak.berlin/go/pixa/internal/imageprocessor"
	"sneak.berlin/go/pixa/internal/imagerequest"
)

// TestAVIFOutputTooLargeAnswers400 checks that respondImageError, which
// answers the errors of both image routes, answers 400 naming the AVIF pixel
// limit when the image processor refuses an AVIF output above it, wrapped as
// the service wraps it. The request's source only goes into a log line, so it
// is left empty.
func TestAVIFOutputTooLargeAnswers400(t *testing.T) {
	t.Parallel()

	h := &Handlers{log: slog.New(slog.DiscardHandler)}
	err := fmt.Errorf("image processing failed: %w: 4097x4096",
		imageprocessor.ErrAVIFOutputTooLarge)
	wantBody := fmt.Sprintf("above %d pixels", imageprocessor.MaxAVIFOutputPixels)

	rec := httptest.NewRecorder()
	h.respondImageError(rec, &imagerequest.Request{}, err)
	t.Logf("status = %d, body = %q", rec.Code, rec.Body.String())

	if rec.Code != http.StatusBadRequest {
		t.Errorf("status = %d, want %d", rec.Code, http.StatusBadRequest)
	}

	if !strings.Contains(rec.Body.String(), wantBody) {
		t.Errorf("body = %q, want it to say %q", rec.Body.String(), wantBody)
	}
}