// Copyright (c) 2026 Storm Dragon
// Authors: Storm Dragon, Angus Kola
// SPDX-License-Identifier: GPL-3.0-or-later

package input

// RepeatTracker is owned by the native input producer. Classic X11 repeats
// release and press with the same timestamp; detectable autorepeat emits
// another press while the key remains down. Neither is a fresh physical press.
type RepeatTracker struct {
	held              [256]bool
	releasedTimestamp [256]uint32
}

func (tracker *RepeatTracker) Observe(event Event) bool {
	code := event.Keycode
	if !event.Pressed {
		tracker.held[code] = false
		tracker.releasedTimestamp[code] = event.Timestamp
		return false
	}
	repeated := tracker.held[code] || event.Timestamp != 0 &&
		tracker.releasedTimestamp[code] == event.Timestamp
	tracker.held[code] = true
	tracker.releasedTimestamp[code] = 0
	return repeated
}

func (tracker *RepeatTracker) Reset() {
	*tracker = RepeatTracker{}
}