extends Node


signal mode_changed
signal path_grid_changed


enum Mode {
	DEFAULT,
	BUILD,
}

var mode: Mode = Mode.DEFAULT :
	set(value):
		mode = value
		mode_changed.emit()


var selected_tower: Tower
var selected_unit: Mob


var path_grid: AStarGrid2D
var map: TileMapLayer

func initialize_stage(tilemap: TileMapLayer):
	map = tilemap
	
	path_grid = AStarGrid2D.new()
	path_grid.region = map.get_used_rect()
	path_grid.cell_size = map.tile_set.tile_size
	path_grid.diagonal_mode = AStarGrid2D.DIAGONAL_MODE_ONLY_IF_NO_OBSTACLES
	path_grid.update()
	
	for tower in get_tree().current_scene.get_node("Towers").get_children():
		path_grid.set_point_solid(
			map.local_to_map(
				tower.global_position
			)
		)


func place_tower(tower: Tower, position: Vector2):
	var grid_position = map.local_to_map(position)
	path_grid.set_point_solid(grid_position, true)
	
	tower.global_position = position
	get_tree().current_scene.get_node("Towers").add_child(tower)
	
	path_grid_changed.emit()

func remove_tower(tower: Tower):
	var grid_position = map.local_to_map(tower.global_position)
	path_grid.set_point_solid(grid_position, false)
	tower.queue_free()
	
	path_grid_changed.emit()

func select_tower(tower: Tower):
	if selected_tower != tower:
		selected_tower = tower
		tower.select()

func deselect_tower():
	if selected_tower:
		get_tree().current_scene.get_node("%Tower").text = ""


func spawn_mob(mob: Mob, spawn: Spawn):
	mob.global_position = spawn.global_position
	mob.target = spawn.next_node.global_position
	mob.hp = randi_range(50, 200)
	mob.speed = randi_range(50, 150)
	mob.get_node("Sprite2D").modulate = Color(randf_range(0, 1), randf_range(0, 1), randf_range(0, 1))
	
	return mob