extends Control


@onready var v_label: Label = %VLabel
@onready var panel_label: Label = %PanelLabel
@onready var transition_overlay: ColorRect = %TransitionOverlay
@onready var vbox: VBoxContainer = %VBox

var _elapsed: float = 0.0
var _animating: bool = false
var _v_start: int
var _v_end: int
var _p_start: int
var _p_end: int


func _ready() -> void:
	if not Engine.is_editor_hint():
		get_window().mode = Window.MODE_FULLSCREEN

	var screen_size: Vector2 = get_viewport_rect().size

	# Compute end font sizes as a large fraction of screen height.
	# Use set() to go through the property system directly.
	_v_end = maxi(1, int(screen_size.y * 0.55))
	_p_end = maxi(1, int(screen_size.y * 0.30))
	_v_start = 4
	_p_start = 4

	_set_v_size(_v_start)
	_set_p_size(_p_start)
	vbox.modulate = Color(1, 1, 1, 0)
	transition_overlay.color = Color(0, 0, 0, 1)

	await get_tree().process_frame

	# Reveal background
	var reveal := create_tween()
	reveal.tween_property(transition_overlay, "color", Color(0, 0, 0, 0), 0.4)
	await reveal.finished

	# Phase 1: Animate font sizes up + fade in
	_elapsed = 0.0
	_animating = true
	var grow := create_tween()
	grow.set_parallel(true)
	grow.tween_method(_set_sizes, 0.0, 1.0, 2.0).set_ease(Tween.EASE_OUT).set_trans(Tween.TRANS_BACK)
	grow.tween_property(vbox, "modulate", Color(1, 1, 1, 1), 1.8).set_ease(Tween.EASE_OUT)
	await grow.finished
	_animating = false

	# Phase 2: Hold
	await get_tree().create_timer(1.0).timeout

	# Phase 3: Fade out
	var fade_out := create_tween()
	fade_out.tween_property(vbox, "modulate", Color(1, 1, 1, 0), 0.8).set_ease(Tween.EASE_IN)
	await fade_out.finished

	# Phase 4: Crossfade to dashboard
	var to_black := create_tween()
	to_black.tween_property(transition_overlay, "color", Color(0, 0, 0, 1), 0.3)
	await to_black.finished

	var dashboard := preload("res://scenes/dashboard.tscn").instantiate()
	add_child(dashboard)

	var from_black := create_tween()
	from_black.tween_property(transition_overlay, "color", Color(0, 0, 0, 0), 0.6)
	await from_black.finished

	remove_child(dashboard)
	get_tree().root.add_child(dashboard)
	queue_free()


func _set_v_size(px: int) -> void:
	v_label.set("theme_override_font_sizes/font_size", px)


func _set_p_size(px: int) -> void:
	panel_label.set("theme_override_font_sizes/font_size", px)


func _set_sizes(progress: float) -> void:
	var v_size: int = maxi(1, int(round(_v_start + progress * (_v_end - _v_start))))
	var p_size: int = maxi(1, int(round(_p_start + progress * (_p_end - _p_start))))
	_set_v_size(v_size)
	_set_p_size(p_size)