extends Node3D

var rng = RandomNumberGenerator.new()
@export var target_location_xz = transform.origin * Vector3(1, 0, 1)
@export var location_xz = transform.origin * Vector3(1, 0, 1)
@export var target_direction_xz = (transform.basis * Vector3(1, 0, 1)).normalized()
@export var direction_xz = (transform.basis * Vector3(1, 0, 1)).normalized()
var task = "idle"

# Percentage chances of the character performing certain actions while idle.
@export var walk_chance = 0.5
@export var spin_chance = 0.8

@export var walk_speed = 1

# Rate at which character corrects their direction after going off course (decimal percentage).
@export var spin_speed = 0.90

# Margin of accuracy to which the character will correct their direction when off course (radians).
@export var dir_accuracy = deg_to_rad(0.1)

# Get the gravity from the project settings to be synced with RigidBody nodes.
var gravity = ProjectSettings.get_setting("physics/3d/default_gravity")

# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	location_xz = transform.origin * Vector3(1, 0, 1)
	direction_xz = (transform.basis * Vector3(1, 0, 1)).normalized()
	
	match task:
		"idle":
			task = rng.randi_range(0, 100)
			
			target_location_xz = location_xz
			
			# Chance to walk somewhere.
			if task <= walk_chance:
				task = "walk"
				target_location_xz = transform.origin * Vector3(1, 0, 1) + (direction_xz * 4)
			# Chance to rotate.
			elif task > walk_chance and task <= (walk_chance + spin_chance):
				task = "spin"
			elif task > 50:
				task = "wait"
		
		"walk":
			pass
		
		"spin":
			if !spinning:
				var spin_amount = rng.randi_range(-360, 360)
				spinning = true
				
			if spin_amount > 0:
				rotate_y(5)
				spin_amount -= 5
			elif spin_amount < 0:
				rotate_y(-5)
				spin_amount += 5
			else:
				task = "idle"
				spinning = false 
							
		"wait":
			# Idle Animation goes here!
			wait_time += 1
			if wait_time == 100:
				task = "idle"
				wait_time = 0
		
	# Walk to target location.
	if (location_xz.distance_to(target_location_xz) > walk_speed) and task == "walk":
		velocity.x = direction_xz.x * walk_speed
		velocity.z = direction_xz.z * walk_speed
	else:
		velocity.x = 0
		velocity.z = 0
	
	move_and_slide()