//go:build nocgo

// This file provides a stub GhosttyEmulator for `go vet` / `go build`
// invocations that pass the `nocgo` build tag, so the rest of the Go code can
// be checked without `libghostty-vt` being installed. The stub fails at
// construction time — there is no functional emulator in `nocgo` builds.

package vt

import "errors"

type GhosttyEmulator struct{}

func NewGhosttyEmulator(cols, rows uint16) (*GhosttyEmulator, error) {
	return nil, errors.New("vt: built with -tags nocgo; libghostty-vt is unavailable")
}

func (e *GhosttyEmulator) Write(p []byte) (int, error)     { return 0, errStub }
func (e *GhosttyEmulator) Resize(cols, rows uint16) error  { return errStub }
func (e *GhosttyEmulator) Size() (uint16, uint16)          { return 0, 0 }
func (e *GhosttyEmulator) PlainText() (string, error)      { return "", errStub }
func (e *GhosttyEmulator) ScreenText() (string, error)     { return "", errStub }
func (e *GhosttyEmulator) SerializeVT() ([]byte, error)    { return nil, errStub }
func (e *GhosttyEmulator) StyledScreenVT() ([]byte, error) { return nil, errStub }
func (e *GhosttyEmulator) Cursor() (CursorState, error)    { return CursorState{}, errStub }
func (e *GhosttyEmulator) ActiveScreen() (Screen, error)   { return 0, errStub }
func (e *GhosttyEmulator) ScrollViewportTop() error        { return errStub }
func (e *GhosttyEmulator) ScrollViewportBottom() error     { return errStub }
func (e *GhosttyEmulator) ScrollViewportDelta(int) error   { return errStub }
func (e *GhosttyEmulator) OnWritePTY(fn func([]byte))      {}
func (e *GhosttyEmulator) Close() error                    { return nil }

var errStub = errors.New("vt: built with -tags nocgo")

var _ Emulator = (*GhosttyEmulator)(nil)