class_name NumberTile
extends Label

var dragging = false
var drag_offset = Vector2()
var original_position = Vector2()
var correct_slot = null  

func _input(event):
	var is_touch = event is InputEventScreenTouch
	var is_mouse_button = event is InputEventMouseButton
	var is_mouse_motion = event is InputEventMouseMotion
	var is_screen_drag = event is InputEventScreenDrag

	# Iniciar arrastre (táctil o ratón)
	if (is_touch and event.pressed) or (is_mouse_button and event.button_index == MOUSE_BUTTON_LEFT and event.pressed):
		if not dragging:
			var viewport_rect = get_viewport_rect()
			var input_pos = event.position
			if get_global_rect().intersects(Rect2(input_pos, Vector2(1, 1))):
				dragging = true
				drag_offset = global_position - input_pos
				original_position = global_position
				z_index = 10

	# Soltar (táctil o ratón)
	if (is_touch and not event.pressed and dragging) or (is_mouse_button and event.button_index == MOUSE_BUTTON_LEFT and not event.pressed and dragging):
		if dragging:  
			dragging = false
			z_index = 0
			check_drop_on_board()

	# Arrastrar (táctil o ratón)
	if (is_screen_drag and dragging) or (is_mouse_motion and dragging and Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT)):
		global_position = event.position + drag_offset

func check_drop_on_board():
	if not get_parent() or not get_parent().get_parent() or not get_parent().get_parent().has_node("GameBoardContainer"):
		return

	var game_board = get_parent().get_parent().get_node("GameBoardContainer").get_node("GameBoard/GridContainer")
	var tile_rect = get_global_rect()
	var placed_on_board = false

	for i in range(game_board.get_child_count()):
		var slot = game_board.get_child(i)
		if slot is Label:
			var slot_rect = slot.get_global_rect()
			if tile_rect.intersects(slot_rect) and text == slot.text and not slot.get("is_occupied"):
				global_position = slot.global_position
				
				slot.add_theme_stylebox_override("normal", StyleBoxFlat.new())
				slot.get_theme_stylebox("normal").bg_color = Color(0.6, 0.9, 0.6)
				
				set_process_input(false)
				dragging = false
				slot.set("is_occupied", true)
				queue_free()
				placed_on_board = true
				break

	if not placed_on_board:
		global_position = original_position