extends Spatial

onready var CardTemplate := preload("res://Scenes/Components/Card.tscn")

onready var camera := $Camera
onready var hand := $Camera/Hand
onready var ui := $BoardUI
onready var cards := $Cards

export var mouseHandThreshold = 0.9

var holdingCard: Card

var mouseOrigin: Vector2
var lastCameraTransform: Transform

func _ready():
	add_card("ff36", 0, true)
	add_card("ff36", 0, false)

func _input(event: InputEvent):
	# Camera zoom
	if event.is_action("zoom_in"):
		camera.zoom(true)
	elif event.is_action("zoom_out"):
		camera.zoom(false)
	# Save original camera and mouse position before panning
	if event.is_action_pressed("pan"):
		mouseOrigin = get_viewport().get_mouse_position()
		lastCameraTransform = camera.transform

func _process(delta: float):
	# If mouse is under a certain area then we're managing our hand
	var absMousePos := get_viewport().get_mouse_position()
	# If panning, translate mouse delta to camera delta
	if Input.is_action_pressed("pan"):
		var mouseDelta := absMousePos - mouseOrigin
		var mousePos: Vector2 = mouseDelta * 0.0096 * (1-camera.get_zoom()/5) # Magic numbers everywhere
		camera.transform.origin = lastCameraTransform.origin - Vector3(mousePos.x, 0, mousePos.y)
	# If holding a card, move it between board/hand
	if holdingCard != null:
		var relPos: float = absMousePos.y / get_viewport().size.y
		var selectingHand: bool = relPos > mouseHandThreshold
		if selectingHand and not holdingCard.inHand:
			holdingCard.inHand = true
			call_deferred("reparent", holdingCard, cards, hand)
		elif not selectingHand and holdingCard.inHand:
			holdingCard.inHand = false
			call_deferred("reparent", holdingCard, hand, cards)

func _card_picked(card: Card):
	holdingCard = card

func _card_dropped(card: Card):
	holdingCard = null

func reparent(object: Node, from: Node, to: Node):
	from.remove_child(object)
	to.add_child(object)
	object.set_owner(to)

func add_card(cardID: String, playerID: int, inHand: bool):
	var card := CardTemplate.instance()
	card.cardID = cardID
	card.playerID = playerID
	card.inHand = inHand
	card.connect("card_dropped", self, "_card_dropped", [card])
	card.connect("card_picked", self, "_card_picked", [card])
	card.connect("card_selected", ui, "_card_selected", [card])
	card.connect("card_unselected", ui, "_card_unselected", [card])
	if inHand:
		# TODO if player != me, put in opponent's hand
		hand.add_child(card)
	else:
		cards.add_child(card)