extends Node

var astar_grid: AStarGrid2D
var toFollow: Array[Vector2i]
@onready var world: TileMapLayer = get_parent().get_parent();
@onready var obstacles: TileMapLayer = world.get_children()[2]

@onready var controled:Human = get_parent()
var destination:Node2D
var HumanLayer = 0

func _ready() -> void:	
	astar_grid = AStarGrid2D.new()
	astar_grid.region = world.get_used_rect()
	astar_grid.cell_size = Vector2(48, 48)
	astar_grid.diagonal_mode = AStarGrid2D.DIAGONAL_MODE_NEVER
	astar_grid.default_compute_heuristic = AStarGrid2D.HEURISTIC_EUCLIDEAN
	astar_grid.default_estimate_heuristic = AStarGrid2D.HEURISTIC_EUCLIDEAN
	astar_grid.update()

	# only take into account the tiles that are marked with a navigation layer for cars
	for x in world.get_used_rect().size.x:
		for y in world.get_used_rect().size.y:
			var tile_position = Vector2(
				x + world.get_used_rect().position.x,
				y + world.get_used_rect().position.y,
			)
			var tile_data = world.get_cell_tile_data(tile_position)
			if tile_data == null or tile_data.get_navigation_polygon(HumanLayer) == null:
				astar_grid.set_point_solid(tile_position)	
			
			if obstacles.get_cell_tile_data(tile_position) != null and  obstacles.get_cell_tile_data(tile_position).get_collision_polygons_count(0):
				astar_grid.set_point_solid(tile_position)

func _process(delta: float) -> void:
	if !controled:
		return
	if destination:
		var my_global_position = controled.get_feet_global_position()
		var target_global_position = destination.get_feet_global_position()

		# make the wanted position on the track move ahead by a certain amount
		#if toFollow == null or toFollow.is_empty():
		# compute the new navigation points the car should follow
		var points = astar_grid.get_id_path(
			world.local_to_map(world.to_local(my_global_position)),
			world.local_to_map(world.to_local(target_global_position))
		).slice(1, -1)
		if !points.is_empty():
			toFollow = points

		if $Label.visible:
			$Label.text = (
				"position "+str(world.local_to_map(world.to_local(my_global_position)))+" , "+str(my_global_position)+
				"\ntarget position "+ str(world.local_to_map(world.to_local(target_global_position)))+" , "+str(target_global_position)+
				"\npoint to follow "+str(toFollow)
				)

		if !toFollow.is_empty():
			if world.local_to_map(world.to_local(my_global_position)) == toFollow.front():
				toFollow.pop_front()
			
			if !toFollow.is_empty():
				controled.moveFeetTo(world.to_global(world.map_to_local(toFollow.front())));
		else:
			controled.face(target_global_position)

func _on_character_body_2d_start_intracting(interactingWith: Human) -> void:
	controled.face(interactingWith.global_position)
	# ouvre un dialogue
	var resource = load("res://caracters/bob/bob.dialogue")
	DialogueManager.show_dialogue_balloon(resource, "start")