package ui

import "io"

// Terminal is used to write messages and display status lines which can be
// updated. See termstatus.Terminal for a concrete implementation.
type Terminal interface {
	// Print writes a line to the terminal. Appends a newline if not present.
	Print(line string)
	// Error writes an error to the terminal. Appends a newline if not present.
	Error(line string)
	// SetStatus sets the status lines to the terminal.
	SetStatus(lines []string)
	// CanUpdateStatus returns true if the terminal can update the status lines.
	CanUpdateStatus() bool
	// OutputRaw returns the output writer. Should only be used if there is no
	// other option. Must not be used in combination with Print, Error, SetStatus
	// or any other method that writes to the terminal.
	OutputRaw() io.Writer
}