extends Node3D
class_name AStarGraph3D

@export var grid_size := Vector2(21, 13)
@export var point_gap := 1.2
var non_build_locations = []
var astar := AStar3D.new()

#TODO generalize this better
@export var start : Node3D
@export var end : Node3D
@export var spawner : EnemySpawner
@export var visualized_path : VisualizedPath
var tower_base_scene = load("res://Scenes/tower_base.tscn")
var tower_frame_scene = load("res://Scenes/tower_frame.tscn")
var tower_bases = []


func toggle_point(point_id):
	networked_toggle_point.rpc(point_id)


func point_is_build_location(point_id):
	return !non_build_locations.has(point_id)


func test_path_if_point_toggled(point_id):
	if astar.is_point_disabled(point_id):
		astar.set_point_disabled(point_id, false)
	else:
		astar.set_point_disabled(point_id, true)
	var result = find_path()
	if astar.is_point_disabled(point_id):
		astar.set_point_disabled(point_id, false)
	else:
		astar.set_point_disabled(point_id, true)
	return result


@rpc("reliable", "any_peer", "call_local")
func networked_toggle_point(point_id):
	if astar.is_point_disabled(point_id):
		astar.set_point_disabled(point_id, false)
	else:
		astar.set_point_disabled(point_id, true)
	var base = tower_base_scene.instantiate()
	base.position = astar.get_point_position(point_id)
	tower_bases.append(base)
	add_child(base)
	find_path()


func find_path() -> bool:
	var path = astar.get_point_path(astar.get_point_count() - 2, astar.get_point_count() - 1)
	if !path.is_empty():
		var curve = Curve3D.new()
		for point in path:
			curve.add_point(point)
		spawner.path.curve = curve
		spawner.path.spawn_visualizer_points()
		return true
	return false


func make_grid():
	for x in grid_size.x:
		for y in grid_size.y:
			var point_position = Vector3((x - floori(grid_size.x / 2)) * point_gap, 0.5, (y - floori(grid_size.y / 2)) * point_gap)
			astar.add_point(int(x * grid_size.y + y), point_position)
			var frame = tower_frame_scene.instantiate()
			frame.position = point_position
			add_child(frame)
	
	for x in grid_size.x:
		for y in grid_size.y:
			var point_id = grid_size.y * x + y
			if x > 0:
				var north_point_id = grid_size.y * (x - 1) + y
				astar.connect_points(point_id, north_point_id, false)
			if x < grid_size.x - 1:
				var south_point_id = grid_size.y * (x + 1) + y
				astar.connect_points(point_id, south_point_id, false)
			if y > 0:
				var east_point_id = grid_size.y * x + (y - 1)
				astar.connect_points(point_id, east_point_id, false)
			if y < grid_size.y - 1:
				var west_point_id = grid_size.y * x + (y + 1)
				astar.connect_points(point_id, west_point_id, false)
	
	non_build_locations.append(astar.get_point_count())
	astar.add_point(astar.get_point_count(), start.global_position)
	for x in grid_size.y:
		astar.connect_points(int(astar.get_point_count() - 1), x)
	non_build_locations.append(astar.get_point_count())
	astar.add_point(astar.get_point_count(), end.global_position)
	for x in grid_size.y:
		astar.connect_points(astar.get_point_count() - 1, int(grid_size.y * (grid_size.x - 1) + x))