class_name Avatar
extends Node2D
## The local player's figure. It moves outside the lockstep simulation; only
## its pickaxe hits become commands.

## Walking speed: five tiles per second.
const SPEED := 5.0 * GridMotion.TILE_SIZE
const RADIUS := 5.0
## Longest frame that moves the figure in one go. Longer frames are cut, so
## that the figure cannot pass through a wall after a stall.
const MAX_STEP_SECONDS := 0.1

## Callable(x: int, y: int) -> bool that says whether a tile can be walked on.
var is_walkable: Callable


func _process(delta: float) -> void:
	walk(Input.get_vector("move_left", "move_right", "move_up", "move_down"), delta)


## Moves the figure in `direction` for `delta` seconds, sliding along walls.
func walk(direction: Vector2, delta: float) -> void:
	if direction == Vector2.ZERO or not is_walkable.is_valid():
		return
	var motion := direction * SPEED * minf(delta, MAX_STEP_SECONDS)
	position = GridMotion.move(position, motion, RADIUS, is_walkable)


func _draw() -> void:
	draw_circle(Vector2.ZERO, RADIUS + 1.0, Color(0.15, 0.1, 0.05))
	draw_circle(Vector2.ZERO, RADIUS, Color(0.95, 0.85, 0.6))