extends HBoxContainer


const upgradeBtnScene : PackedScene = preload("res://UI/upgrade_button.tscn")


var tower : Tower


func _ready() -> void:
	EventBus.tower_selected.connect(onTowerSelected)
	EventBus.tower_changed.connect(onTowerChange)


func onTowerSelected(towerType : Tower.TYPE) -> void:
	if towerType == Tower.TYPE.NONE:
		visible = false
		tower = null
		return

	tower = Game.towers.get(towerType)
	visible = true
	onTowerChange(tower)
	if not tower.builded:
		%UpgradeContainer.visible = false
		return

	createTowerUpgradeButton()


func onTowerChange(_tower : Tower) -> void:
	if _tower == tower:
		%TowerIcon.texture = tower.icone
		%TowerName.text = tower.tower_name
		%TowerDamage.text = "Dmg : %d" % tower.projectileRessource.damage
		%TowerCooldown.text = "cooldown : %.1f" % tower.action_cooldown
		# TODO Check for better UI to display it
		#%TowerBio.text = tower.bio
		%TowerEnergy.text = "%d/%d" % [ tower.energy, tower.max_energy ]


func createTowerUpgradeButton() -> void:
	%UpgradeContainer.visible = true
	%UpgradeContainer.get_children().map(func(btn): btn.queue_free())
	for upgrade in tower.upgrades:
		prints(upgrade.baseCost, upgrade.cost)
		var btn : UpgradeButton = upgradeBtnScene.instantiate()
		%UpgradeContainer.add_child(btn)
		btn.setData(tower, upgrade)