extends KinematicBody2D

#refs
onready var sprite: AnimatedSprite = get_node("Sprite")
# Constants
const DEFAULT_SNAP		= Vector2(0, 32)
const SPEEDY 			= 250
const GRAVITY 			= 900
const JUMP_FORCE 		= 500
const slope_slide_threshold = 50.0

# State
var velocity 			= Vector2(0, 0)
var snap 				= false
var friction			= 0.5
var animation 			= "idle_1"
var flip				= false
# Input
var action_jump			= false
var jump_release 		= false;
var direction_x 		= 0


func _ready():
	set_process_input(true)
	pass


func update_animation(velocity: Vector2):

	var walking = abs(velocity.x) > 10

	if walking and is_on_floor():
		animation = "run"
	elif is_on_floor():
		animation = "idle_1"
	elif not is_on_floor():
		animation = "jump" if velocity.y < 0 else "fall";

	if walking:
		sprite.flip_h = velocity.x < 0

	if sprite.animation != animation:
		sprite.play(animation)


################################################################################################
#    Handle Physics
#
################################################################################################
func _physics_process(delta):
	# Handle left and right
	direction_x = Input.get_action_strength("ui_right") - Input.get_action_strength("ui_left")
	velocity.x = direction_x * SPEEDY

	# Handle Jump
	if is_on_floor() and snap:
		if Input.is_action_just_pressed("ui_jump"):
			velocity.y = -JUMP_FORCE
			snap = false

	# Normalizations
	velocity.y += GRAVITY * delta;
	velocity.x = lerp(velocity.x, 0, friction)

	var snap_vector = DEFAULT_SNAP if snap else Vector2()

	# Physics
	velocity = move_and_slide(velocity, Vector2.UP, true)

	var just_landed = is_on_floor() and not snap

	if just_landed:
		snap = true

	update_animation(velocity)

	action_jump = false
	jump_release = false