@tool

extends Area2D
class_name PostIt
var sibling
var shift_tween
var modulate_tween

@export var text: String = "" :
    set (value):
        if is_inside_tree() or Engine.is_editor_hint():
            $Content/Label.text = value
            $Content/BackgroundSprite.frame = text.hash() % $Content/BackgroundSprite.sprite_frames.get_frame_count($Content/BackgroundSprite.animation)
        text = value
        

@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)

var mouse_offset: Vector2

@onready var diameter = $CollisionShape2D.shape.height
@export_range(1.0, 10.0) var bounce_speed: float = 8
var on_board = false

func _ready() -> void:
    
    self.set_meta("type", "post-it")  # set type information to find out if this node is a post-it
    
    $Content/Label.text = self.text
    $Content/BackgroundSprite.frame = text.hash() % $Content/BackgroundSprite.sprite_frames.get_frame_count($Content/BackgroundSprite.animation)
    

func replace_with(postit: PostIt):
    self.text = postit.text
    self.voice_line = postit.voice_line
    self.sibling = postit.sibling
    self.name = postit.name
    for group in self.get_groups():
        self.remove_from_group(group)
    for group in postit.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_post_it()


func _on_focus_entered():
    print(self, "is focused")

func _on_focus_exited():
    print(self, "is not focused")

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

func _on_mouse_exited():
    highlighted = false
    if is_postit_attached() and "check_hover" in get_parent():
        get_parent().check_hover()

func _on_input_event(viewport, event, shape_idx):
    if event is InputEventMouseMotion:
        _move_post_it()
        
    if event is InputEventMouseButton:
        if event.button_index == MOUSE_BUTTON_LEFT:
            if "handle_mouse_button" in owner:
                mouse_offset = (get_viewport().get_mouse_position() - global_position)
                owner.handle_mouse_button(self, event)

func _move_post_it():
    if is_dragged:
        position += (get_viewport().get_mouse_position() - position) - mouse_offset

func is_postit_attached() -> bool:
    if self.get_parent().get_meta("type") == "card":
        return true
    return false

func tween_transform_to(target: Vector2):
    var transform_tween = create_tween()
    transform_tween.tween_property(self, "position", target, 0.25)