package imageprocessor

import (
	"bytes"
	"io"
	"testing"
)

// TestImageProcessor_LoadsEachSourceFormat verifies that an image in each of
// the six source formats, saved by the processor itself, is loaded and saved
// again in its own format (orig).
func TestImageProcessor_LoadsEachSourceFormat(t *testing.T) {
	t.Parallel()

	proc := New(Params{})

	for _, format := range []Format{
		FormatJPEG, FormatPNG, FormatGIF, FormatWebP, FormatAVIF, FormatJXL,
	} {
		saved, err := proc.Process(t.Context(),
			bytes.NewReader(createTestPNG(t, 20, 20)), &Request{Format: format})
		if err != nil {
			t.Fatalf("saving the test image as %s: %v", format, err)
		}

		source, err := io.ReadAll(saved.Content)
		if err != nil {
			t.Fatalf("reading the %s image: %v", format, err)
		}

		result, err := proc.Process(t.Context(), bytes.NewReader(source),
			&Request{Format: FormatOriginal})
		if err != nil {
			t.Errorf("orig of the %s image: %v", format, err)

			continue
		}

		t.Logf("orig of the %s image: %s", format, result.ContentType)

		if result.ContentType != FormatToMIME(format) {
			t.Errorf("orig of the %s image is %s, want %s",
				format, result.ContentType, FormatToMIME(format))
		}
	}
}