extends HBoxContainer


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

var tower : Tower

func _ready() -> void:
	EventBus.tower_selected.connect(onTowerSelected)
	EventBus.cube_selected.connect(onCubeSelected)


func onCubeSelected() -> void:
	visible = true
	$PanelContainer2.visible = false
	createTowerUpgradeButtons(Game.upgrades)


func onTowerSelected(towerType : Tower.TYPE) -> void:
	if tower:
		tower.energy_changed.disconnect(onEnergyChange)
		tower.changed.disconnect(onTowerChange)

	if towerType == Tower.TYPE.NONE:
		tower = null
		visible = false
		return

	$PanelContainer2.visible = true
	tower = Game.towers.get(towerType)
	tower.energy_changed.connect(onEnergyChange)
	tower.changed.connect(onTowerChange)
	createTowerUpgradeButtons(tower.upgrades)
	visible = true
	onTowerChange()


func onEnergyChange() -> void:
	%TowerEnergy.text = "%d/%d" % [ tower.energy, tower.max_energy ]


func onTowerChange() -> void:
	onEnergyChange()
	%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

	if tower.builded && not %UpgradeContainer.visible:
		createTowerUpgradeButtons(tower.upgrades)


func createTowerUpgradeButtons(upgrades : Array) -> void:
	if tower && not tower.builded:
		%UpgradeContainer.visible = false
		return

	%UpgradeContainer.visible = true
	%UpgradeContainer.get_children().map(func(btn): btn.queue_free())
	for upgrade in upgrades:
		var btn : UpgradeButton = upgradeBtnScene.instantiate()
		%UpgradeContainer.add_child(btn)
		btn.setUpgrade(upgrade)
		if tower:
			btn.setTower(tower)