## BuildPanel.gd
## Displays available towers for the selected player's race and handles placement.
extends PanelContainer

@onready var tower_list: VBoxContainer = $ScrollContainer/TowerList
@onready var race_label: Label = $RaceLabel
@onready var close_btn: Button = $CloseButton

var _player_id: int = 0
var _selected_slot: Node = null
var _tower_defs: Array = []

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

func open_for_slot(slot: Node, player_id: int) -> void:
	_selected_slot = slot
	_player_id = player_id
	var race = GameState.get_player_race(player_id)
	race_label.text = race.capitalize()
	_tower_defs = DataLoader.load_towers(race)
	_populate_list()
	show()

func _populate_list() -> void:
	for child in tower_list.get_children():
		child.queue_free()
	for tower in _tower_defs:
		var btn := Button.new()
		var cost = tower.get("cost_minerals", 0)
		btn.text = "%s  [%dM]" % [tower.get("id", "?").replace("_", " ").capitalize(), cost]
		btn.disabled = Economy.get_minerals(_player_id) < cost
		btn.pressed.connect(_on_tower_selected.bind(tower))
		tower_list.add_child(btn)

func _on_tower_selected(tower_data: Dictionary) -> void:
	if _selected_slot == null:
		return
	var cost = tower_data.get("cost_minerals", 0)
	if Economy.spend_minerals(_player_id, cost):
		_selected_slot.place_tower(tower_data, _player_id)
	hide()

func _on_phase_changed(new_phase: GameState.Phase) -> void:
	if new_phase != GameState.Phase.BUILD:
		hide()