extends Node2D

@export var navigation_polygon: Array[Polygon2D] = []

@onready var graph: NavigationGraph = $NavGraph
@onready var character: CharacterBody2D = $CharacterBody2D

var seleted_polygon: int = 0


func _ready() -> void:
    for polygon in navigation_polygon:
        polygon.hide()

        update_polygon()


func update_polygon():
    var polygons: Array[PackedVector2Array] = Geometry2D.decompose_polygon_in_convex(navigation_polygon[seleted_polygon].polygon)
    graph.erase_and_create_nodes_from_polygons(polygons)


func _process(delta: float) -> void:
    # check for left and right arrow keys to change the selected polygon (0, len(navigation_polygon)-1)
    if Input.is_action_just_pressed("ui_right"):
        seleted_polygon += 1
        if seleted_polygon >= len(navigation_polygon):
            seleted_polygon = 0
        update_polygon()

    if Input.is_action_just_pressed("ui_left"):
        seleted_polygon -= 1
        if seleted_polygon < 0:
            seleted_polygon = len(navigation_polygon) - 1
        update_polygon()

    if Input.is_action_just_pressed("draw_toggle_polygon"):
        graph.draw_polygons = !graph.draw_polygons
    if Input.is_action_just_pressed("draw_toggle_nodes") or Input.is_action_just_pressed("draw_toggle_edges"):
        graph.draw_nodes = !graph.draw_nodes
        graph.draw_edges = !graph.draw_edges