class_name PaletteEntryButton
extends Control

# One selectable tile in the setup editor's palette: either the generic
# capture-point marker, or one enemy definition's own hull/colour. Drawn
# directly from the definition rather than a fixed icon set, so a new
# EnemyDefinitions entry shows up automatically with no editor code change.

signal pressed

@export var is_capture_point: bool = false
const ENEMY_DEFINITIONS = preload("res://enemies/EnemyDefinitions.gd")

@export var enemy_definition: Resource
@export var selected: bool = false: set = set_selected

const RING_COLOR: Color = Color(0.55, 0.85, 1.0)


func set_selected(value: bool) -> void:
	selected = value
	queue_redraw()


func _ready() -> void:
	queue_redraw()


func _gui_input(event: InputEvent) -> void:
	if event is InputEventScreenTouch and not event.pressed \
			and Rect2(Vector2.ZERO, size).has_point(event.position):
		pressed.emit()
	elif event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and not event.pressed:
		pressed.emit()


func _draw() -> void:
	var center: Vector2 = size / 2.0
	var margin: float = 4.0
	var frame: PackedVector2Array = PackedVector2Array([
		Vector2(margin, margin), Vector2(size.x - margin, margin),
		Vector2(size.x - margin, size.y - margin), Vector2(margin, size.y - margin),
	])
	var frame_color: Color = Color(1.0, 0.95, 0.9) if selected else Color(0.4, 0.45, 0.5)
	NeonDraw.draw_glowing_polygon(self, frame, frame_color, 0.85 if selected else 0.5)

	if is_capture_point:
		var points: PackedVector2Array = PackedVector2Array()
		for i in range(16):
			var angle: float = float(i) / 16.0 * TAU
			points.append(center + Vector2(cos(angle), sin(angle)) * (size.x * 0.28))
		NeonDraw.draw_glowing_polygon(self, points, RING_COLOR, 0.8)
	elif enemy_definition != null:
		# Same routine as the marker and the enemy, so the button previews
		# what will actually be placed.
		var scale_factor: float = (size.x * 0.5) / 28.0 * 0.6
		ENEMY_DEFINITIONS.draw_definition(self, enemy_definition,
			enemy_definition.glow_color, scale_factor, center)