@tool

extends Area2D
class_name StickyNote

var sticky_id
var parent_id

var sibling: StickyNote
var shift_tween: Tween
var modulate_tween: Tween
var card_stick_tween: Tween
var hovering_cards: Array[Card]
var hover_pos_shift: float
var attached_to: Node = null:
	set(new_attatchement):
		attached_to = new_attatchement
# cannot be explicitly typed, as this can be bnoth handled by picker and physics-board
var current_handle: Node

var position_locked: bool = false

signal transform_tween_finished

@export var text: String = "" :
	set (value):
		if is_node_ready():
			_on_text_updated()
		text = value
var content: Node2D
var label: Label
var background_sprite: AnimatedSprite2D

@export var shift_by: Vector2 = Vector2(-32, 0)
@export_color_no_alpha var highlight_color: Color = Color(1.5, 1.5, 1.5)
@export var highlighted: bool = false:
	set(highlight):
		if highlight != highlighted:
			highlighted = highlight

			if is_inside_tree() and is_node_ready():
				if modulate_tween: modulate_tween.kill()
				if shift_tween: shift_tween.kill()
				if highlighted:
					modulate_tween = get_tree().create_tween()
					modulate_tween.tween_property(self, "modulate", highlight_color, 0.1)
					shift_tween = get_tree().create_tween()
					shift_tween.tween_property(content, "position", shift_by, 0.2)
				else:
					modulate_tween = get_tree().create_tween()
					modulate_tween.tween_property(self, "modulate", Color(1, 1, 1), 0.3)
					shift_tween = get_tree().create_tween()
					shift_tween.tween_property(content, "position", Vector2.ZERO, 0.5)
			else:
				if highlighted:
					modulate = Color(1, 1, 1)
				else:
					modulate = Color(1, 1, 1)

@export var voice_line: AudioStream = null
@export var is_dragable: bool = false
@onready var base_rotation = rotation
@onready var base_scale = scale
var is_dragged: bool = false:
	set(dragged):
		is_dragged = dragged
		z_index = int(dragged)
		if not is_dragged: highlighted = false

var initial_drag_position: Vector2
var mouse_diff: Vector2

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

func _init(sticky_name: String = "card", card_id: StringName = "-1", own_id:StringName = "-1") -> void:
	text = sticky_name
	parent_id = card_id
	sticky_id = own_id

func _ready() -> void:
	if get_child_count() == 0:
		content = Node2D.new()
		add_child(content, false, Node.INTERNAL_MODE_BACK)
		label = Label.new()
		label.autowrap_mode = TextServer.AUTOWRAP_WORD
		label.size = Vector2( 295.0, 97.0 )
		label.position = Vector2( -52.0, -50.0 )
		label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
		#FIXME eventually replace with better theme handling
		label.theme = State.current_main_theme
		State.theme_changed.connect(func change_theme(new_theme): label.theme = new_theme)
		content.add_child(label, false, Node.INTERNAL_MODE_BACK)
		background_sprite = AnimatedSprite2D.new()
		background_sprite.sprite_frames = preload("res://logic-scenes/board/card-textures/sticky-note_sprites.tres")
		background_sprite.scale = Vector2(0.65, 0.65)
		background_sprite.position = Vector2(99.5, 0)
		content.add_child(background_sprite, false, Node.INTERNAL_MODE_FRONT)
		var collision_shape := CollisionShape2D.new()
		var capsule := CapsuleShape2D.new()
		capsule.radius = 48.0
		capsule.height = diameter
		collision_shape.shape = capsule
		add_child(collision_shape, false, Node.INTERNAL_MODE_FRONT)
		collision_shape.position.x = 99.5
		collision_shape.rotation = PI/2
		
		label.theme_type_variation = "card_text"
	else:
		label = $Content/Label
		background_sprite = $Content/BackgroundSprite
		content = $Content
	_on_text_updated()
	
	input_event.connect(_on_input_event)
	mouse_entered.connect(_on_mouse_entered)
	mouse_exited.connect(_on_mouse_exited)
	area_entered.connect(_on_area_enter)
	area_exited.connect(_on_area_exit)
	
	

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

func replace_with(sticky_note: StickyNote):
	self.text = sticky_note.text
	self.voice_line = sticky_note.voice_line
	self.sibling = sticky_note.sibling
	self.name = sticky_note.name
	for group in self.get_groups():
		self.remove_from_group(group)
	for group in sticky_note.get_groups():
		self.add_to_group(group)

func _process(delta: float) -> void:
	if get_overlapping_areas().size() > 0 and is_dragable and on_board:
		for area in get_overlapping_areas():
			if area is Card or area is CardCollider:
				if area is CardCollider:
					position += area.direction * delta
				elif not area.highlighted or self.highlighted: 
					var diff:Vector2 = position - area.position
					position -= diff.normalized() * ((diff.length()-diameter)/diameter) * bounce_speed * (delta/(1.0/60))
	
	_move_sticky_note()

func _on_mouse_entered():
	if not Input.is_action_pressed("mouse_left"):
		highlighted = true
		if current_handle != null:
			if "handle_hover" in current_handle:
				current_handle.handle_hover(self)

func _on_mouse_exited():
	if not is_dragged:
		highlighted = false
		
	if is_sticky_note_attached() and "check_hover" in attached_to:
		attached_to.check_hover()

func _on_area_enter(card: Area2D):
	if card is Card:
		if hovering_cards == []:
			hovering_cards = [card]
			card_stick_tween = get_tree().create_tween()
			card_stick_tween.set_ease(Tween.EASE_IN_OUT)
			card_stick_tween.tween_property(self, "hover_pos_shift", 0.3, 0.1)
		else:
			hovering_cards.append(card)
	elif card is StickyNote and is_sticky_note_in_panel() and not is_dragged:
		attached_to.create_gap()

func _on_area_exit(card: Area2D):
	if hovering_cards != [] and card is Card:
		if card in hovering_cards:
			hovering_cards.erase(card)
			card.highlighted = false
			if hovering_cards == []:
				hover_pos_shift = 0
				content.position = Vector2.ZERO
	elif card is StickyNote and is_sticky_note_in_panel():
		attached_to.collapse_gap()

func _on_input_event(_viewport, event, _shape_idx):
	if event is InputEventMouseButton:
		if (event.button_index == MOUSE_BUTTON_LEFT and event.pressed) or event.button_index == MOUSE_BUTTON_RIGHT:
			if "handle_hover" in current_handle:
				mouse_diff = get_viewport().get_mouse_position()
				initial_drag_position = global_position
				current_handle.handle_mouse_button(event, self)

func _move_sticky_note():
	if is_dragged:
		var old_position = position
		position = initial_drag_position + get_viewport().get_mouse_position() - mouse_diff
		
		if hovering_cards != []:
			var closest: Card = hovering_cards[0]
			for card in hovering_cards:
				card.highlighted = false
				if (closest.position - position).length() > (closest.position - position).length():
					card = closest
			closest.highlighted = true
			content.position = (closest.sticky_note_anchor.global_position - global_position) * hover_pos_shift

func is_sticky_note_attached() -> bool:
	return attached_to is Card

func is_sticky_note_in_panel() -> bool:
	return attached_to is StickyNotePanel

func tween_transform_to(target: Transform2D):
	var transform_tween: Tween = create_tween()
	transform_tween.tween_property(self, "transform", target, 0.25)
	await transform_tween.finished
	transform_tween_finished.emit()

func reset_drag():
	if attached_to != null:
		attached_to.reclaim_sticky_note()

func free() -> void:
	assert(false)