extends LevelState


var trans_tween: Tween


func _enter(_previous_state_path: String, _data: Dictionary = {"round": 0, "restart": false}) -> void:
	get_tree().paused = true
	assert((_data["round"] as int) in range(3), "round number is invalid")
	assert(
		(_data["restart"] as bool) == true or
		(_data["restart"] as bool) == false,
		"round restart data is invalid"
	)
	level.current_round = _data["round"]
	level.restarted = _data["restart"]
	
	if level.restarted:
		level.current_round = 0
		level.scoreboard = Vector2i(0,0)
		level.restarted = false
	
	assert(
		(level.player_1 != null and level.player_2 != null) or
		(level.player_1 == null and level.player_2 == null),
		"desynced player instantiation?"
	)
	
	if level.player_1 != null and level.player_2 != null:
		level.player_1.queue_free()
		level.player_2.queue_free()
		
	if level.ball != null:
		level.ball.queue_free()
	
	assert(level.player_1 == null and level.player_2 == null, "players werent nulled")
	assert(level.ball == null, "ball wasnt nulled")
	
	level.current_round += 1
	
	if level.current_round == 4:
		finished.emit(FINISHING)
		return
	
	level.player_1 = _instantiate_player(1)
	level.player_2 = _instantiate_player(2)
	level.ball = _instantiate_ball()
	
	_trans_zoom_out(level.ball.global_position, Vector2(4,4), 2)


func _instantiate_player(id: int) -> Player:
	var s: PlayerSpawnPoint = level.player_1_spawn if id == 1 else level.player_2_spawn
	var p: Player = s.player_scene.instantiate()
	
	p.id = id
	p.name = "Player"+str(id)
	
	level.add_child(p)
	
	p.global_position = s.global_position
	p.global_position = s.global_position
	
	return p


func _instantiate_ball() -> Ball:
	var s: BallSpawnPoint = level.ball_spawn
	var b: Ball = s.ball_scene.instantiate()
	
	level.add_child(b)
	
	b.global_position = s.global_position
	
	return b


func _trans_zoom_out(pos: Vector2, zoom_in: Vector2, duration: float = 1) -> void:
	if trans_tween:
		trans_tween.kill()
	
	assert(trans_tween == null, "transgender tween wasnt nulled")
	
	trans_tween = create_tween()
	
	level.camera.global_position = pos
	level.camera.zoom = zoom_in
	trans_tween.tween_property(level.camera, "zoom", Vector2(1,1), duration).set_trans(Tween.TRANS_BOUNCE).set_ease(Tween.EASE_OUT)
	trans_tween.tween_callback(func() -> void:
		finished.emit(PLAYING)
		trans_tween = null
	)