extends Sprite

signal positionReached
var Route
signal pathAnimationCompleted
var isSelected = false
var isMoving = false
var boardUnitsIndex
onready var region = get_parent().get_parent().get_parent()

func on_ready():#this connects the unit to the main node using signals
	connect("pathAnimationCompleted",region, "_on_pathAnimationCompleted")
	snapToPosition()
	if region.boardUnits[boardUnitsIndex].faction == "enemyFaction":
		modulate = Color(1,0,0,1)
	if region.boardUnits[boardUnitsIndex].faction == "allyFaction":
		modulate = Color(0,1,0,1)
#	emit_signal("pathAnimationCompleted")

func snapToPosition():
	self.position = get_parent().get_parent().map_to_world(region.boardUnits[boardUnitsIndex].coords)
	var undertiles = []
	undertiles.append(Vector2(region.boardUnits[boardUnitsIndex].coords.x,region.boardUnits[boardUnitsIndex].coords.y))
	undertiles.append(Vector2(region.boardUnits[boardUnitsIndex].coords.x,region.boardUnits[boardUnitsIndex].coords.y+1))
	undertiles.append(Vector2(region.boardUnits[boardUnitsIndex].coords.x+1,region.boardUnits[boardUnitsIndex].coords.y))
	undertiles.append(Vector2(region.boardUnits[boardUnitsIndex].coords.x+1,region.boardUnits[boardUnitsIndex].coords.y+1))
#	unitCurrentUndertiles = undertiles
	pass

func moveOnPath(route:Array):#this coordinates the movement/animation
	isMoving=true
	var indexPosition = 0
	for coords in route:
		if route[0] == coords:
			var t = Transform2D()
			t.origin = coords
		else:
			moveTo(route[indexPosition],coords)
			yield(self,"positionReached")
			indexPosition+=1
	emit_signal("pathAnimationCompleted")
	isMoving = false

var speed =4
onready var motion = Vector2(0,0)

func moveTo(start:Vector2, destination:Vector2):#this does a step of the movement/animation. coordinated by moveOnPath
	var travel = destination-start
	motion = travel*speed
	yield(get_tree().create_timer(travel.length()/motion.length()), "timeout")
	motion= Vector2(0,0)
	var t = Transform2D()
	t.origin = destination
	transform = t
	emit_signal("positionReached")
#	unitCurrentPosition=GlobalTileMap.world_to_map(destination)
	snapToPosition()

func _physics_process(delta):
	position += motion*delta