package term

import "fmt"

// CursorFlag is used as a parameter to function TurnCursor and
// describes if cursor should be displayed or not.
type CursorFlag bool

const (
	CursorOn  CursorFlag = true  // Cursor should be visible
	CursorOff CursorFlag = false // Cursor should be hidden
)

// TurnCursor turns the cursor on and off according to the parameter.
func TurnCursor(onOff CursorFlag) {
	switch onOff {
	case CursorOn:
		fmt.Print("\033[?25h")
	case CursorOff:
		fmt.Print("\033[?25l")
	}
}

// ClearScreen clears current screen.
func ClearScreen() {
	fmt.Print("\033[2J")
}

// ResetTerminal resets terminal (ESC c)
func ResetTerminal() {
	fmt.Print("\033c")
}

// GoHome moves cursor to the home position (upper left corner)
func GoHome() {
	fmt.Print("\033[H")
}

// SaveCursor saves curent position of the SaveCursor
func SaveCursor() {
	fmt.Print("\033[s")
}

// RestoreCursor restore cursor to the position saved previously with SaveCursor().
func RestoreCursor() {
	fmt.Print("\033[u")
}

// EnableAlternateScreen switches the terminal to the alternative screen.
// The alternative screen doesn't have the scroll buffer.
func EnableAlternateScreen() {
	fmt.Print("\033[?1049h")
}

// DiableAlternateScreen switches the terminal to the primary screen.
func DisableAlternateScreen() {
	fmt.Print("\033[?1049l")
}

// StartFullscreen saves the cursor, enables alternate screen and clears it.
func StartFullscreen() {
	SaveCursor()
	EnableAlternateScreen()
	ClearScreen()
}

// FinishFullscreen returns to the primary screen and restores the cursor.
func FinishFullscreen() {
	DisableAlternateScreen()
	RestoreCursor()
}