extends Draggable
class_name StickyNote

var sticky_id
var parent_id : StringName

var sibling: StickyNote
var shift_tween: Tween
var modulate_tween: Tween

# cannot be explicitly typed, as this can be both handled by picker and physics-board
var current_handle: Node

var position_locked: bool = false

## Computed property: Is this currently attached to a card
var is_attached : bool:
	get: return get_parent() is Card

## Replaces the need for tracking attached_to as state
var attached_to: Card:
	get: return get_parent() as Card if is_attached else null


@onready var background_sprite: AnimatedSprite2D = %BackgroundSprite

@export var text: String = "" :
	set (value):
		if is_node_ready():
			_on_text_updated.call_deferred()
		text = value
var content: Node2D
var label: Label

@export var shift_by: Vector2 = Vector2(-32, 0)
@export_color_no_alpha var highlight_color: Color = Color(1.5, 1.5, 1.5)


## Override set_highlight to add visual feedback for sticky notes
func set_highlight(value: bool) -> void:
	if value != _highlighted:
		_highlighted = value

		if modulate_tween: modulate_tween.kill()
		if shift_tween: shift_tween.kill()

		if _highlighted:
			modulate_tween = create_tween()
			modulate_tween.tween_property(self, "modulate", highlight_color, 0.1)
			shift_tween = create_tween()
			shift_tween.tween_property(content, "position", shift_by, 0.2)
		else:
			modulate_tween = create_tween()
			modulate_tween.tween_property(self, "modulate", Color(1, 1, 1), 0.3)
			shift_tween = create_tween()
			shift_tween.tween_property(content, "position", Vector2.ZERO, 0.5)

@export var voice_line: AudioStream = null
@export var is_draggable: bool = false

var mouse_offset: Vector2

@onready var diameter := 312.0
@export_range(1.0, 10.0) var bounce_speed: float = 8


func init(sticky_name: String = "sticky_note", card_id: StringName = "-1") -> void:
	name = sticky_name
	text = sticky_name
	parent_id = StringName(card_id.rsplit(".", false, 1)[0])
	sticky_id = card_id

func _ready() -> void:
	super._ready()
	label = $Content/Label
	background_sprite = $Content/BackgroundSprite
	content = $Content

	_on_text_updated.call_deferred()


func _on_text_updated():
	label.text = text
	background_sprite.frame = text.hash() % background_sprite.sprite_frames.get_frame_count(background_sprite.animation)


func _process(_delta: float) -> void:
	if is_dragged:
		update_drag_position(get_viewport().get_mouse_position())


# === DRAG LIFECYCLE OVERRIDES ===

## End drag operation and return the node we were dropped on
func end_drag() -> Node:
	super.end_drag()
	return _find_drop_target()


## Find best drop target: Card > Panel > Board (in priority order)
func _find_drop_target() -> Node:
	# Priority 1: Check for overlapping cards in dropzone
	var closest : Card = null
	for area in get_overlapping_areas():
		if area is StickyNote and not area.is_attached: continue # Can only drop on attached stickies

		if area is Card:
			if (not closest) or ((area.position - position).length() < (closest.position - position).length()):
				closest = area

	return closest


## Sticky notes are exempt from confinement if stuck to a card
func confine_to_screen() -> void:
	if attached_to is not Card: super.confine_to_screen()