## Tower.gd
## Represents a placed tower during the build phase.
## During combat phase, spawns/morphs into a Fighter.
class_name Tower
extends Node2D

@export var tower_id: String = ""
@export var player_id: int = 0

var _data: Dictionary = {}
var _fighter: Node = null

func _ready() -> void:
	EventBus.phase_changed.connect(_on_phase_changed)

func setup(tower_data: Dictionary, pid: int) -> void:
	_data = tower_data
	tower_id = tower_data.get("id", "")
	player_id = pid

func get_data() -> Dictionary:
	return _data

func can_upgrade() -> bool:
	return _data.has("upgrades_to") and _data["upgrades_to"] != ""

func get_upgrade_id() -> String:
	return _data.get("upgrades_to", "")

func _on_phase_changed(new_phase: GameState.Phase) -> void:
	match new_phase:
		GameState.Phase.COMBAT:
			_spawn_fighter()
		GameState.Phase.BUILD:
			_recall_fighter()

func _spawn_fighter() -> void:
	var fighter_scene = load("res://scenes/gameplay/Fighter.tscn") as PackedScene
	if not fighter_scene:
		return
	_fighter = fighter_scene.instantiate()
	_fighter.setup(_data)
	get_parent().add_child(_fighter)
	_fighter.global_position = global_position

func _recall_fighter() -> void:
	if _fighter and is_instance_valid(_fighter):
		_fighter.queue_free()
		_fighter = null