Door.gd

extends Area


export(float) var openCloseTime = 0.5

var whatToDo = "open door"


#if not zero, then door is locked and must be unlocked with the item of the given id
export(int) var unlockItemId = 0
export(bool) var stayOpen = false
export(bool) var opensOnlyFromOneSide = false


# Declare member variables here. Examples:
# var a = 2
# var b = "text"

var doorOpen = false
var doorInUse = false

var lastOpeningAngle=0
var targetOpeningAngle = 0
var curOpeningAngle = 0
var timer = 0


# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.


func _door_interpolate(a, b, t):
	var steps=3
	var t2=round(t*steps)/steps
	return a+(b-a)*t2


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	if doorInUse:
		timer+=delta
		if timer >= openCloseTime:
			doorInUse=false
			timer=openCloseTime
			
			if doorOpen:
				whatToDo="close door"
			else:
				whatToDo="open door"

		var t =timer/openCloseTime
		#curOpeningAngle=lastOpeningAngle+(targetOpeningAngle-lastOpeningAngle)*t
		curOpeningAngle=_door_interpolate(lastOpeningAngle, targetOpeningAngle, t)
		
		$Anchor/Mesh.transform.basis = Basis(Vector3.UP, curOpeningAngle)
	


func _on_Area_body_entered(body):
	if stayOpen and doorOpen:
		return
	
	if body.name == "Player" and not doorInUse: # hardcoded, whatever
		if is_locked():
			whatToDo = "unlock door"
		if is_on_correct_side(body):
			body.enable_interaction(self)
		
	pass


func _on_Area_body_exited(body):
	if stayOpen and doorOpen:
		return
	
	if body.name == "Player" and not doorInUse:
		body.disable_interaction(self)
	
	
	pass # Replace with function body.


func on_player_interact(player):
	print("Player wants to open a door")
	if doorInUse or (stayOpen and doorOpen):
		return
	
	if is_locked():
		print("Player wants to unlock the door")
		
		#Hardcoded inventory
		var inventory = get_node("/root/Spatial/MarginContainer/CanvasLayer/Inventory")
		if inventory.contains(unlockItemId):
			unlockItemId=0
			whatToDo="open door"
			player.disable_interaction(self)
			player.enable_interaction(self)
		else:
			print("Player does not have the right key...")
			#TODO show this on screen
			$AudioStreamPlayer3D.play()

		return
	
	player.disable_interaction(self)
	
	doorInUse = true
	doorOpen = not doorOpen
	
	if doorOpen:
		lastOpeningAngle = 0
		targetOpeningAngle = PI/2
	else:
		lastOpeningAngle = PI/2
		targetOpeningAngle = 0
	
	curOpeningAngle = lastOpeningAngle
	timer = 0
	

func is_locked():
	return unlockItemId!=0


func is_on_correct_side(player):
	if not opensOnlyFromOneSide:
		return true
	
	#Hardcoded, whatever
	var normal = Vector3(-1, 0, 0)
	var diff = player.transform.origin-transform.origin
	return diff.dot(normal)>0