@tool
class_name AbstractPlatform
extends AnimatableBody2D


const TILE_SIZE = 8
const MIN_WIDTH = TILE_SIZE * 2
const MAX_WIDTH = TILE_SIZE * 32


@export_range(MIN_WIDTH, MAX_WIDTH, TILE_SIZE) var platform_width: int = MIN_WIDTH:
	set(value):
		value = clampi(value, MIN_WIDTH, MAX_WIDTH)
		platform_width = value - (value % TILE_SIZE)
		if is_node_ready():
			rebuild_platform()


@onready var collision: CollisionShape2D = $CollisionShape2D
@onready var sub_viewport: SubViewport = $SubViewport
@onready var platform_rect: ColorRect = $SubViewport/PlatformRect
@onready var icon_sprite: AnimatedSprite2D = $SubViewport/IconSprite


func _ready() -> void:
	if not Engine.is_editor_hint():
		platform_rect.material.set_shader_parameter("seed", randf())
	platform_rect.material.set_shader_parameter("tile_size", TILE_SIZE)
	rebuild_platform()


func rebuild_platform() -> void:
	var shape := collision.shape as RectangleShape2D
	shape.size.x = platform_width
	
	var platfor_size := Vector2(platform_width, TILE_SIZE)
	
	sub_viewport.size = platfor_size
	icon_sprite.position = platfor_size/2
	platform_rect.size.x = platform_width
	platform_rect.position = Vector2.ZERO
	
	platform_rect.material.set_shader_parameter("platform_width", platform_width)