package protocol

import "testing"

func TestLoopbackUsesFramePayload(t *testing.T) {
	client, daemon := NewLoopbackPair()
	defer client.Close()
	defer daemon.Close()

	sent, err := NewFrame(FrameInput, Input{PaneID: "p_123456", Bytes: []byte("hello")})
	if err != nil {
		t.Fatalf("NewFrame: %v", err)
	}
	if err := client.Send(sent); err != nil {
		t.Fatalf("Send: %v", err)
	}
	got, err := daemon.Recv()
	if err != nil {
		t.Fatalf("Recv: %v", err)
	}
	if got.Type != FrameInput {
		t.Fatalf("type = %q, want %q", got.Type, FrameInput)
	}
	payload, err := Decode[Input](got)
	if err != nil {
		t.Fatalf("Decode: %v", err)
	}
	if payload.PaneID != "p_123456" || string(payload.Bytes) != "hello" {
		t.Fatalf("payload = %#v", payload)
	}
}

func TestLoopbackCopiesPayloadOnSend(t *testing.T) {
	client, daemon := NewLoopbackPair()
	defer client.Close()
	defer daemon.Close()

	f := Frame{Type: FramePaneChunk, Payload: []byte(`{"pane_id":"p","bytes":"aGVsbG8="}`)}
	if err := client.Send(f); err != nil {
		t.Fatalf("Send: %v", err)
	}
	f.Payload[0] = 'x'

	got, err := daemon.Recv()
	if err != nil {
		t.Fatalf("Recv: %v", err)
	}
	if got.Payload[0] != '{' {
		t.Fatalf("payload was retained instead of copied: %q", string(got.Payload))
	}
}