frame-of-mind/src/base-environments/transition/code/dolly.gd

## A dolly tweens all contents to and from two destination points, and to its origin.
class_name Dolly
extends Node3D

@export var index : int = -1
@export var signage_group : String

@export_group("Motion")
@export_subgroup("Arrival")
@export var pre_arrival_time : float = 17.0 # hold train for this long (to sync with audio!)
@export var arrival_time : float = 15.0 # train takes this long to enter (shorter = faster)
@export var trans_arrival : Tween.TransitionType = Tween.TRANS_CIRC
@export var ease_arrival : Tween.EaseType = Tween.EASE_OUT

@export_subgroup("In Station")
@export var station_wait_time : float = 20.0

@export_subgroup("Departure")
@export var door_close_time : float = 1.0
@export var leave_time : float  = 15.0 # train takes this long to leave the platform
@export var trans_departure : Tween.TransitionType = Tween.TRANS_QUAD
@export var ease_departure : Tween.EaseType = Tween.EASE_IN


@onready var origination : Node3D = $Origination
@onready var destination : Node3D = $Destination

@onready var subway : SubwayTrain = $Subway

@onready var subway_audio_main : AudioStreamPlayer3D = %SubwayTrainAudio
@onready var subway_audio_2 : AudioStreamPlayer3D = %SubwayTrainAudioIntense

var player_on_board : bool:
	get: return %EntryDetect.overlaps_body(State.player)

var tween : Tween = null


## Player is about to arrive
signal train_approaching(track : Dolly)

## Player has fully arrived at station
signal train_arrived(track : Dolly)

## Player is departing in train
signal train_departing(track : Dolly)

## Player has fully left the station with train
signal train_left(track : Dolly)


func _ready() -> void:
	reset()

func set_line(line: StringName):
	subway.set_line(line)
	
## One arrival and departure
func cycle() -> void:
	await arrive()
	await leave()

func reset() -> void:
	if tween: tween.kill()
	subway.global_position = origination.global_position

func _seat_player() -> void:
	prints("Player departs inside Train", self.name)
	State.player.reparent(subway)


func _unseat_player() -> void:
	prints("Player arrives on Train", self.name)
	State.player.reparent(get_parent())



func arrive(endstation : bool = false) -> void:
	subway_audio_main.play()
	subway_audio_2.play()

	await get_tree().create_timer(pre_arrival_time).timeout

	if player_on_board:
		train_approaching.emit(self)

	if tween: tween.kill()
	tween = create_tween().set_trans(trans_arrival).set_ease(ease_arrival)
	tween.parallel().tween_property(subway, "global_position", self.global_position, arrival_time)
	await tween.finished
	subway.door_open = true

	if player_on_board:
		_unseat_player()
		train_arrived.emit(self)


	if endstation:
		subway_audio_main.stop()
		subway_audio_2.stop()



func leave() -> void:
	await get_tree().create_timer(station_wait_time).timeout
	subway.door_open = false
	await get_tree().create_timer(door_close_time).timeout

	if player_on_board:
		_seat_player()
		train_departing.emit(self)


	if tween: tween.kill()
	tween = create_tween().set_trans(trans_departure).set_ease(ease_departure)
	tween.parallel().tween_property(subway, "global_position", destination.global_position, leave_time)

	# Player is on board and will be leaving
	await tween.finished

	# Player was on board and has left the station
	if player_on_board: train_left.emit(self)
	reset() # Warp back / rewind train position