class_name StreakCounter
extends Node

## Sole writer of the streak count (AnchorV1.0 "ComboCounter").
## Pure fact subscriber: +1 on skill_executed, reset on miss / chart_reset.

var streak := 0


func _ready() -> void:
	for bus: Node in _event_buses():
		if bus.has_signal("skill_executed") and not bus.is_connected("skill_executed", _on_skill_executed):
			bus.connect("skill_executed", _on_skill_executed)
		if bus.has_signal("judgement_made") and not bus.is_connected("judgement_made", _on_judgement_made):
			bus.connect("judgement_made", _on_judgement_made)
		if bus.has_signal("time_anchor_resolved") and not bus.is_connected("time_anchor_resolved", _on_time_anchor_resolved):
			bus.connect("time_anchor_resolved", _on_time_anchor_resolved)
		if bus.has_signal("chart_reset") and not bus.is_connected("chart_reset", _on_chart_reset):
			bus.connect("chart_reset", _on_chart_reset)


func _on_skill_executed(_skill: Resource, _judgement: StringName) -> void:
	streak += 1
	_broadcast()


func _on_judgement_made(quality: StringName, _offset_ms: float, _beat_index: int) -> void:
	if quality != &"miss":
		return
	reset()


func _on_time_anchor_resolved(_anchor: Dictionary, held: bool, _judgement: Dictionary) -> void:
	if held:
		return
	reset()


func _on_chart_reset(_chart_id: StringName) -> void:
	reset()


func reset() -> void:
	if streak == 0:
		return
	streak = 0
	_broadcast()


func _broadcast() -> void:
	for bus: Node in _event_buses():
		if bus.has_signal("streak_changed"):
			bus.emit_signal("streak_changed", streak)


func _event_buses() -> Array[Node]:
	var buses: Array[Node] = []
	if not is_inside_tree():
		return buses
	for child: Node in get_tree().root.get_children():
		if child.has_signal("skill_executed") and child.has_signal("streak_changed"):
			buses.append(child)
	return buses