class_name ActionFormat


## Byte Length: 2 [br]
## SP
var signature: String = "AC"

## Byte Type: u8 [br]
## Byte Length: 2
var version: Version

## Byte Type: u16 [br]
## Byte Length: 2
var action_count: int

## Byte Type: u8 [br]
## Byte Length: 10
var reserved: PackedByteArray

## Length: [member action_count]
var actions: Array[Action]

## Byte Type: u16 [br]
## Byte Length: 2
var event_count: int

## Length: [member event_count]
var events: Array[Event]

## Byte Type: f32 [br]
## Byte Length: 4
var frame_times: float


func get_byte_length() -> int:
		var length := 22
		
		for action in actions:
			length += action.get_byte_length()
			
		length += Event.BYTE_LENGTH * event_count
		
		return length


static func from_bytes(bytes: PackedByteArray):
	var action = ActionFormat.new()
	
	@warning_ignore("shadowed_variable")
	var version = Version.new()
	version.minor = bytes.decode_u8(2)
	version.major = bytes.decode_u8(3)
	action.version = version
	
	print(version)
	
	action.action_count = bytes.decode_u16(4)
	action.reserved = bytes.slice(6, 6 + 10)
	
	# TODO
	action.actions = [] as Array[Action]
	
	action.event_count = 0
	
	action.frame_times = 0.0
	
	print(inst_to_dict(action))
	
	return action


class Action:
	## Byte Type: u32 [br]
	## Byte Length: 4
	var motion_count: int
	
	## Length: [member motion_count]
	var motions: Array[Motion]
	
	
	func get_byte_length() -> int:
		var length := 4
		for motion in motions:
			length += motion.get_byte_length()
		
		return length


class Motion:
	## Byte Type: u8 [br]
	## Byte Length: 32
	var unused: PackedByteArray
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var sprite_layer_count: int

	## Length: [member sprite_layer_count]
	var sprite_layers: Array[SpriteLayer]
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var event_id: int
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var sprite_anchor_count: int
	
	## Length: [member sprite_anchor_count]
	var sprite_anchors: Array[SpriteAnchor]
	
	
	func get_byte_length() -> int:
		return 44 + SpriteLayer.BYTE_LENGTH * sprite_layer_count + SpriteAnchor.BYTE_LENGTH * sprite_anchor_count


class SpriteLayer:
	const BYTE_LENGTH := 48
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var position_u: int
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var position_v: int
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var sprite_index: int
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var is_flipped_vertical: int
	
	## Byte Type: u8 [br]
	## Byte Length: 1
	var color_r: int
	
	## Byte Type: u8 [br]
	## Byte Length: 1
	var color_g: int
	
	## Byte Type: u8 [br]
	## Byte Length: 1
	var color_b: int
	
	## Byte Type: u8 [br]
	## Byte Length: 1
	var color_a: int
	
	## Byte Type: f32 [br]
	## Byte Length: 4
	var scale_u: float
	
	## Byte Type: f32 [br]
	## Byte Length: 4
	var scale_v: float
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var rotation_degrees: int
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var sprite_type: int
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var sprite_width: int
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var sprite_height: int
	
	
	func get_position() -> Vector2:
		return Vector2(position_u, position_v)
	
	
	func get_color() -> Color:
		return Color8(color_r, color_g, color_b, color_a)
	
	
	func get_scale() -> Vector2:
		return Vector2(scale_u, scale_v)
	
	
	func get_size() -> Vector2:
		return Vector2(sprite_width, sprite_height)


class SpriteAnchor:
	const BYTE_LENGTH := 16
	
	## Byte Type: u8 [br]
	## Byte Length: 4
	var unused: PackedByteArray
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var position_u: int
	
	## Byte Type: i32 [br]
	## Byte Length: 4
	var position_v: int
	
	## Byte Type: u32 [br]
	## Byte Length: 4
	var flag: int
	
	
	func get_position() -> Vector2:
		return Vector2(position_u, position_v)


class Event:
	const BYTE_LENGTH := 40
	
	## Byte Type: u8 [br]
	## Byte Length: 40
	var name: String