extends Unit

var current_command := WeakRef.new()

func _compose():
	$chief.visible = is_chief
	super._compose()

func tick():
	chief_maintenance()
	
	if is_chief:
		var command := current_command.get_ref() as Command
		if command and command.global_position.distance_to(global_position) > 100.0:
			# go near current command
			move_to(Tools.jitter(command.global_position, 50.0, 100.0))
			return
	else:
		var chief = get_chief()
		if chief and chief.global_position.distance_to(global_position) > 100.0:
			# go near chief
			move_to(Tools.jitter(chief.global_position, 50.0, 100.0))
			return
	
	var enemy := Tools.get_nearest(self, get_tree().get_nodes_in_group("unit"), 
		func filter(unit): return unit is Unit and unit.player != player)
	if enemy:
		# go near current target enemy
		move_to(Tools.jitter(enemy.global_position, 100.0, 300.0))
		$turret.set_target(enemy)

func chief_maintenance():
	if is_chief:
		# already chief
		return
		
	var chief = get_chief()
	if chief == null:
		# find a chief
		var chiefs = list_chiefs()
		# TODO sort by distance, experience and subordinate count
		if chiefs.size() > 0:
			set_chief(chiefs[0])
		else:
			promote_chief()
			_compose()

func _on_commands_changed(commands):
	if is_chief:
		var defend := Tools.get_nearest(self, commands, 
			func filter(command): return command.player == player and command.code == "defend")
			
		if defend:
			current_command = weakref(defend)