package handlers

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

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

// TestAVIFOutputTooLargeAnswers400 checks that respondImageError and
// handleImageError, which answer the errors of the two image routes, answer
// 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)

	plain := httptest.NewRecorder()
	h.respondImageError(plain, &imgcache.ImageRequest{}, err)

	encrypted := httptest.NewRecorder()
	h.handleImageError(encrypted, err)

	for name, rec := range map[string]*httptest.ResponseRecorder{
		"respondImageError": plain, "handleImageError": encrypted,
	} {
		t.Logf("%s: status = %d, body = %q", name, rec.Code, rec.Body.String())

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

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