package capture

import (
	"bufio"
	"bytes"
	"testing"

	"tea.chunkbyte.com/kato/go-worm/lib/models"
)

func TestCaptureProtocolRoundTrip(t *testing.T) {
	t.Parallel()
	var buf bytes.Buffer
	if err := writeRequest(&buf, 1, "jpeg", 40); err != nil {
		t.Fatal(err)
	}
	mon, format, quality, err := readRequest(bufio.NewReader(bytes.NewReader(buf.Bytes())))
	if err != nil {
		t.Fatal(err)
	}
	if mon != 1 || format != "jpeg" || quality != 40 {
		t.Fatalf("request = %d %s %d", mon, format, quality)
	}

	buf.Reset()
	want := models.CapturedImage{
		ContentType: "image/jpeg",
		Data:        []byte{0xff, 0xd8, '\n', 0x00, 0xff},
		Left:        10, Top: 20, Width: 100, Height: 50,
	}
	if err := writeFrame(&buf, want); err != nil {
		t.Fatal(err)
	}
	got, err := readResponse(bufio.NewReader(&buf))
	if err != nil {
		t.Fatal(err)
	}
	if got.ContentType != want.ContentType || got.Left != want.Left || got.Width != want.Width || !bytes.Equal(got.Data, want.Data) {
		t.Fatalf("frame mismatch: %#v", got)
	}
}

func TestCaptureProtocolError(t *testing.T) {
	t.Parallel()
	var buf bytes.Buffer
	if err := writeErr(&buf, "no displays found"); err != nil {
		t.Fatal(err)
	}
	_, err := readResponse(bufio.NewReader(&buf))
	if err == nil || err.Error() != "no displays found" {
		t.Fatalf("err = %v", err)
	}
}