extends VBoxContainer

const Brand := preload("res://scripts/ui/medmind_style.gd")
const STAR_ICON := preload("res://assets/icons/lucide/star.svg")
const CLOCK_ICON := preload("res://assets/icons/lucide/clock-3.svg")
const CABINET_FRAME := preload("res://assets/slot_machine/cabinet_frame.png")
const LEVER_TEXTURE := preload("res://assets/slot_machine/lever.png")
const SLOT_COIN := preload("res://assets/slot_machine/slot_coin.png")
const SLOT_GEM := preload("res://assets/slot_machine/slot_gem.png")
const SLOT_POTION := preload("res://assets/slot_machine/slot_potion.png")
const SLOT_SHIELD := preload("res://assets/slot_machine/slot_shield.png")
const SLOT_COIN_STACK := preload("res://assets/slot_machine/slot_coin_stack.png")
const SLOT_GIFT := preload("res://assets/slot_machine/slot_gift.png")
const REEL_SYMBOLS := [SLOT_COIN, SLOT_GEM, SLOT_POTION, SLOT_SHIELD, SLOT_COIN_STACK, SLOT_GIFT]
# fraction-of-image rect of the cabinet's empty reel window, measured against cabinet_frame.png
const WINDOW_RECT := Rect2(0.203, 0.246, 0.591, 0.604)
const REWARD_ICONS := {
	"jackpot": {"texture": SLOT_COIN, "modulate": false},
	"epic": {"texture": SLOT_GEM, "modulate": false},
	"great": {"texture": SLOT_SHIELD, "modulate": false},
	"exam_token": {"texture": CLOCK_ICON, "modulate": true},
	"qbank_reset": {"texture": SLOT_GIFT, "modulate": false},
	"nice": {"texture": SLOT_COIN_STACK, "modulate": false},
	"good_luck": {"texture": SLOT_COIN, "modulate": false, "tint": true},
}

var main: Control

var subtitle_label: Label
var machine_root: Control
var lever_button: TextureButton
var reel_states: Array = []
var win_up_to_card: PanelContainer
var win_up_to_label: Label
var cost_card: PanelContainer
var cost_value_label: Label
var auto_card: PanelContainer
var spin_button: Button
var auto_spin_toggle: CheckButton
var status_label: Label
var rewards_list: VBoxContainer
var footer_card: PanelContainer
var footer_icon_panel: PanelContainer
var footer_icon: TextureRect
var footer_heading: Label
var footer_description: Label

var _spinning := false


func _ready() -> void:
	size_flags_horizontal = Control.SIZE_EXPAND_FILL
	size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_theme_constant_override("separation", 18)

	_build_header()

	var body := HBoxContainer.new()
	body.add_theme_constant_override("separation", 18)
	body.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(body)

	var left_column := VBoxContainer.new()
	left_column.add_theme_constant_override("separation", 16)
	left_column.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	body.add_child(left_column)

	_build_machine(left_column)
	_build_controls(left_column)
	_build_rewards_panel(body)

	status_label = Label.new()
	status_label.add_theme_font_override("font", Brand.font)
	status_label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	add_child(status_label)

	_build_footer()

	CreditsService.credits_changed.connect(_refresh_spin_button)
	CreditsService.spin_config_loaded.connect(_refresh_rewards)
	UIThemeService.theme_changed.connect(func(_dark: bool): _refresh_theme_controls())
	_refresh_rewards()
	_refresh_spin_button()


func on_show(_payload: Variant = null) -> void:
	CreditsService.refresh()
	CreditsService.fetch_spin_config()
	_refresh_rewards()
	_refresh_spin_button()


func _build_header() -> void:
	var title := Label.new()
	title.text = "RZ Coin Slot Machine"
	title.add_theme_font_override("font", Brand.font)
	title.add_theme_font_size_override("font_size", 30)
	add_child(title)
	subtitle_label = Label.new()
	subtitle_label.text = "Test your luck and win exciting rewards!"
	subtitle_label.add_theme_font_override("font", Brand.font)
	subtitle_label.add_theme_font_size_override("font_size", 14)
	subtitle_label.add_theme_color_override("font_color", Brand.muted_color(UIThemeService.is_dark_mode()))
	add_child(subtitle_label)


func _build_machine(parent: Control) -> void:
	machine_root = Control.new()
	machine_root.custom_minimum_size = Vector2(560, 560)
	machine_root.size_flags_horizontal = Control.SIZE_SHRINK_BEGIN
	machine_root.size_flags_vertical = Control.SIZE_SHRINK_BEGIN
	parent.add_child(machine_root)

	var frame := TextureRect.new()
	frame.texture = CABINET_FRAME
	frame.set_anchors_preset(Control.PRESET_FULL_RECT)
	frame.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	frame.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT
	frame.mouse_filter = Control.MOUSE_FILTER_IGNORE
	machine_root.add_child(frame)

	var window := Control.new()
	window.anchor_left = WINDOW_RECT.position.x
	window.anchor_top = WINDOW_RECT.position.y
	window.anchor_right = WINDOW_RECT.position.x + WINDOW_RECT.size.x
	window.anchor_bottom = WINDOW_RECT.position.y + WINDOW_RECT.size.y
	window.mouse_filter = Control.MOUSE_FILTER_IGNORE
	machine_root.add_child(window)

	var center := CenterContainer.new()
	center.set_anchors_preset(Control.PRESET_FULL_RECT)
	window.add_child(center)

	var reels_grid := HBoxContainer.new()
	reels_grid.add_theme_constant_override("separation", 16)
	center.add_child(reels_grid)

	var cell := 66.0
	reel_states.clear()
	for _column_index in range(3):
		var clip := Control.new()
		clip.clip_contents = true
		clip.custom_minimum_size = Vector2(cell, cell * 3)
		reels_grid.add_child(clip)

		var strip := VBoxContainer.new()
		strip.add_theme_constant_override("separation", 0)
		clip.add_child(strip)

		var icons: Array = []
		for _row_index in range(4):
			var icon := TextureRect.new()
			icon.texture = REEL_SYMBOLS[randi() % REEL_SYMBOLS.size()]
			icon.custom_minimum_size = Vector2(cell, cell)
			icon.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
			icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
			strip.add_child(icon)
			icons.append(icon)

		reel_states.append({
			"strip": strip,
			"icons": icons,
			"step": cell,
			"speed": 620.0,
			"spinning": false,
			"stop_requested": false,
			"target_texture": null,
			"recycles_after_target": -1,
			"done": true,
		})

	lever_button = TextureButton.new()
	lever_button.texture_normal = LEVER_TEXTURE
	lever_button.ignore_texture_size = true
	lever_button.stretch_mode = TextureButton.STRETCH_KEEP_ASPECT_CENTERED
	lever_button.anchor_left = 0.80
	lever_button.anchor_right = 1.06
	lever_button.anchor_top = 0.24
	lever_button.anchor_bottom = 0.88
	lever_button.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND
	lever_button.tooltip_text = "Pull to spin"
	lever_button.resized.connect(func(): lever_button.pivot_offset = Vector2(lever_button.size.x * 0.5, lever_button.size.y * 0.92))
	lever_button.pressed.connect(_on_lever_pulled)
	machine_root.add_child(lever_button)


func _build_controls(parent: Control) -> void:
	var dark := UIThemeService.is_dark_mode()

	win_up_to_card = PanelContainer.new()
	win_up_to_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	parent.add_child(win_up_to_card)
	var win_margin := MarginContainer.new()
	win_margin.add_theme_constant_override("margin_left", 14)
	win_margin.add_theme_constant_override("margin_right", 14)
	win_margin.add_theme_constant_override("margin_top", 10)
	win_margin.add_theme_constant_override("margin_bottom", 10)
	win_up_to_card.add_child(win_margin)
	win_up_to_label = Label.new()
	win_up_to_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	win_up_to_label.add_theme_font_override("font", Brand.font)
	win_up_to_label.add_theme_font_size_override("font_size", 15)
	win_up_to_label.add_theme_color_override("font_color", Brand.text_color(dark))
	win_margin.add_child(win_up_to_label)

	var controls_row := HBoxContainer.new()
	controls_row.add_theme_constant_override("separation", 12)
	parent.add_child(controls_row)

	cost_card = PanelContainer.new()
	cost_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	controls_row.add_child(cost_card)
	var cost_margin := MarginContainer.new()
	cost_margin.add_theme_constant_override("margin_left", 14)
	cost_margin.add_theme_constant_override("margin_right", 14)
	cost_margin.add_theme_constant_override("margin_top", 8)
	cost_margin.add_theme_constant_override("margin_bottom", 8)
	cost_card.add_child(cost_margin)
	var cost_box := VBoxContainer.new()
	cost_box.add_theme_constant_override("separation", 0)
	cost_margin.add_child(cost_box)
	var cost_caption := Label.new()
	cost_caption.text = "Cost per spin"
	cost_caption.add_theme_font_override("font", Brand.font)
	cost_caption.add_theme_font_size_override("font_size", 11)
	cost_caption.add_theme_color_override("font_color", Brand.muted_color(dark))
	cost_box.add_child(cost_caption)
	cost_value_label = Label.new()
	cost_value_label.add_theme_font_override("font", Brand.font)
	cost_value_label.add_theme_font_size_override("font_size", 15)
	cost_value_label.add_theme_color_override("font_color", Brand.text_color(dark))
	cost_box.add_child(cost_value_label)

	spin_button = Button.new()
	spin_button.text = "Spin"
	spin_button.custom_minimum_size = Vector2(140, 58)
	spin_button.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	spin_button.size_flags_vertical = Control.SIZE_SHRINK_CENTER
	spin_button.add_theme_font_override("font", Brand.font)
	spin_button.add_theme_font_size_override("font_size", 17)
	_style_spin_button()
	spin_button.pressed.connect(_on_spin_pressed)
	controls_row.add_child(spin_button)

	auto_card = PanelContainer.new()
	auto_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	controls_row.add_child(auto_card)
	var auto_margin := MarginContainer.new()
	auto_margin.add_theme_constant_override("margin_left", 14)
	auto_margin.add_theme_constant_override("margin_right", 14)
	auto_margin.add_theme_constant_override("margin_top", 8)
	auto_margin.add_theme_constant_override("margin_bottom", 8)
	auto_card.add_child(auto_margin)
	var auto_box := VBoxContainer.new()
	auto_box.add_theme_constant_override("separation", 0)
	auto_margin.add_child(auto_box)
	auto_spin_toggle = CheckButton.new()
	auto_spin_toggle.text = "Auto Spin"
	auto_spin_toggle.add_theme_font_override("font", Brand.font)
	auto_box.add_child(auto_spin_toggle)
	var auto_caption := Label.new()
	auto_caption.text = "10 spins"
	auto_caption.add_theme_font_override("font", Brand.font)
	auto_caption.add_theme_font_size_override("font_size", 11)
	auto_caption.add_theme_color_override("font_color", Brand.muted_color(dark))
	auto_box.add_child(auto_caption)

	var info_label := Label.new()
	info_label.text = "All rewards are instant and sent to your account."
	info_label.add_theme_font_override("font", Brand.font)
	info_label.add_theme_font_size_override("font_size", 11)
	info_label.add_theme_color_override("font_color", Brand.muted_color(dark))
	info_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	parent.add_child(info_label)


func _build_rewards_panel(parent: Control) -> void:
	var dark := UIThemeService.is_dark_mode()
	var panel := PanelContainer.new()
	panel.custom_minimum_size = Vector2(280, 0)
	panel.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	parent.add_child(panel)

	var margin := MarginContainer.new()
	margin.add_theme_constant_override("margin_left", 16)
	margin.add_theme_constant_override("margin_right", 16)
	margin.add_theme_constant_override("margin_top", 14)
	margin.add_theme_constant_override("margin_bottom", 14)
	panel.add_child(margin)

	var column := VBoxContainer.new()
	column.add_theme_constant_override("separation", 10)
	margin.add_child(column)

	var heading := Label.new()
	heading.text = "Possible Rewards"
	heading.add_theme_font_override("font", Brand.font)
	heading.add_theme_font_size_override("font_size", 16)
	heading.add_theme_color_override("font_color", Brand.text_color(dark))
	column.add_child(heading)

	rewards_list = VBoxContainer.new()
	rewards_list.add_theme_constant_override("separation", 10)
	column.add_child(rewards_list)


func _build_footer() -> void:
	var dark := UIThemeService.is_dark_mode()
	footer_card = PanelContainer.new()
	footer_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	add_child(footer_card)

	var margin := MarginContainer.new()
	margin.add_theme_constant_override("margin_left", 16)
	margin.add_theme_constant_override("margin_right", 16)
	margin.add_theme_constant_override("margin_top", 12)
	margin.add_theme_constant_override("margin_bottom", 12)
	footer_card.add_child(margin)

	var row := HBoxContainer.new()
	row.add_theme_constant_override("separation", 14)
	margin.add_child(row)

	footer_icon_panel = PanelContainer.new()
	footer_icon_panel.custom_minimum_size = Vector2(36, 36)
	footer_icon_panel.size_flags_vertical = Control.SIZE_SHRINK_CENTER
	footer_icon_panel.add_theme_stylebox_override("panel", Brand.icon_circle_box(dark, Brand.ROYAL_BLUE, 18))
	footer_icon = TextureRect.new()
	footer_icon.texture = STAR_ICON
	footer_icon.custom_minimum_size = Vector2(18, 18)
	footer_icon.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	footer_icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	footer_icon.modulate = Brand.ROYAL_BLUE
	footer_icon_panel.add_child(footer_icon)
	row.add_child(footer_icon_panel)

	var copy := VBoxContainer.new()
	copy.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	copy.size_flags_vertical = Control.SIZE_SHRINK_CENTER
	copy.add_theme_constant_override("separation", 2)
	footer_heading = Label.new()
	footer_heading.text = "How it works"
	footer_heading.add_theme_font_override("font", Brand.font)
	footer_heading.add_theme_font_size_override("font_size", 15)
	footer_heading.add_theme_color_override("font_color", Brand.text_color(dark))
	copy.add_child(footer_heading)
	footer_description = Label.new()
	footer_description.text = "Spend RZ Coins to spin the slot machine. Win coins, boosts, tokens, and more!"
	footer_description.add_theme_font_override("font", Brand.font)
	footer_description.add_theme_font_size_override("font_size", 12)
	footer_description.add_theme_color_override("font_color", Brand.muted_color(dark))
	footer_description.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	copy.add_child(footer_description)
	row.add_child(copy)


func _refresh_theme_controls() -> void:
	var dark := UIThemeService.is_dark_mode()
	subtitle_label.add_theme_color_override("font_color", Brand.muted_color(dark))
	win_up_to_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	win_up_to_label.add_theme_color_override("font_color", Brand.text_color(dark))
	cost_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	cost_value_label.add_theme_color_override("font_color", Brand.text_color(dark))
	auto_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	footer_card.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
	footer_icon_panel.add_theme_stylebox_override("panel", Brand.icon_circle_box(dark, Brand.ROYAL_BLUE, 18))
	footer_heading.add_theme_color_override("font_color", Brand.text_color(dark))
	footer_description.add_theme_color_override("font_color", Brand.muted_color(dark))
	_refresh_rewards()


func _reward_color(key: String) -> Color:
	match key:
		"jackpot": return Brand.AMBER
		"epic": return Brand.PURPLE
		"great": return Brand.ROYAL_BLUE
		"exam_token": return Brand.ROYAL_BLUE
		"qbank_reset": return Brand.SUCCESS
		"nice": return Brand.SKY_BLUE
		"good_luck": return Brand.SLATE
		_: return Brand.ROYAL_BLUE


func _refresh_rewards() -> void:
	var dark := UIThemeService.is_dark_mode()
	cost_value_label.text = "%d RZ Coins" % CreditsService.spin_cost

	var max_coins := 0
	for reward_variant in CreditsService.spin_rewards:
		if typeof(reward_variant) != TYPE_DICTIONARY:
			continue
		max_coins = maxi(max_coins, int((reward_variant as Dictionary).get("coinAmount", 0)))
	win_up_to_label.text = "Win up to %s RZ Coins!" % _format_thousands(max_coins) if max_coins > 0 else ""

	for child in rewards_list.get_children():
		child.queue_free()
	for reward_variant in CreditsService.spin_rewards:
		if typeof(reward_variant) != TYPE_DICTIONARY:
			continue
		var reward: Dictionary = reward_variant
		rewards_list.add_child(_build_reward_row(dark, reward))


func _build_reward_row(dark: bool, reward: Dictionary) -> HBoxContainer:
	var key := str(reward.get("key", ""))
	var accent := _reward_color(key)
	var row := HBoxContainer.new()
	row.add_theme_constant_override("separation", 10)

	var icon_panel := PanelContainer.new()
	icon_panel.custom_minimum_size = Vector2(36, 36)
	icon_panel.size_flags_vertical = Control.SIZE_SHRINK_CENTER
	icon_panel.add_theme_stylebox_override("panel", Brand.icon_circle_box(dark, accent, 18))
	var icon := TextureRect.new()
	var spec: Dictionary = REWARD_ICONS.get(key, {"texture": SLOT_COIN, "modulate": false})
	icon.texture = spec.get("texture")
	icon.custom_minimum_size = Vector2(22, 22)
	icon.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	if spec.get("modulate", false):
		icon.modulate = accent
	elif spec.get("tint", false):
		icon.modulate = Color("94a3b8")
	icon_panel.add_child(icon)
	row.add_child(icon_panel)

	var copy := VBoxContainer.new()
	copy.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	copy.size_flags_vertical = Control.SIZE_SHRINK_CENTER
	copy.add_theme_constant_override("separation", 0)
	var label := Label.new()
	label.text = str(reward.get("label", ""))
	label.add_theme_font_override("font", Brand.font)
	label.add_theme_font_size_override("font_size", 13)
	label.add_theme_color_override("font_color", Brand.text_color(dark))
	copy.add_child(label)
	var description := Label.new()
	description.text = str(reward.get("description", ""))
	description.add_theme_font_override("font", Brand.font)
	description.add_theme_font_size_override("font_size", 11)
	description.add_theme_color_override("font_color", Brand.muted_color(dark))
	copy.add_child(description)
	row.add_child(copy)

	var percent_label := Label.new()
	percent_label.text = "%s%%" % _format_percent(float(reward.get("probability", 0.0)) * 100.0)
	percent_label.add_theme_font_override("font", Brand.font)
	percent_label.add_theme_font_size_override("font_size", 13)
	percent_label.add_theme_color_override("font_color", accent)
	row.add_child(percent_label)

	return row


func _refresh_spin_button() -> void:
	var disabled := _spinning or CreditsService.credits < CreditsService.spin_cost
	spin_button.disabled = disabled
	lever_button.disabled = disabled


func _on_lever_pulled() -> void:
	_play_lever_pull_animation()
	_on_spin_pressed()


func _play_lever_pull_animation() -> void:
	var tween := create_tween()
	tween.tween_property(lever_button, "rotation_degrees", -20.0, 0.1).set_trans(Tween.TRANS_QUAD).set_ease(Tween.EASE_OUT)
	tween.tween_property(lever_button, "rotation_degrees", 0.0, 0.3).set_trans(Tween.TRANS_ELASTIC).set_ease(Tween.EASE_OUT)


func _on_spin_pressed() -> void:
	if _spinning:
		return
	_spinning = true
	_refresh_spin_button()
	var spin_count := 10 if auto_spin_toggle.button_pressed else 1
	for _i in range(spin_count):
		if CreditsService.credits < CreditsService.spin_cost:
			break
		var should_continue := await _do_one_spin()
		if not should_continue:
			break
	_spinning = false
	_refresh_spin_button()


func _do_one_spin() -> bool:
	for state in reel_states:
		state["stop_requested"] = false
		state["target_texture"] = null
		state["recycles_after_target"] = -1
		state["done"] = false
		_spin_reel(state)

	var result := await _await_spin_result()

	if not result.get("ok", false):
		for state in reel_states:
			state["target_texture"] = REEL_SYMBOLS[randi() % REEL_SYMBOLS.size()]
			state["stop_requested"] = true
		await _await_reels_done()
		status_label.text = str(result.get("message", "The spin could not be completed."))
		status_label.add_theme_color_override("font_color", Brand.MAGENTA)
		return false

	var reward_key := str(result.get("reward_key", ""))
	var reward_texture := _icon_for_reward(reward_key)
	for index in range(reel_states.size()):
		var state: Dictionary = reel_states[index]
		get_tree().create_timer(index * 0.25).timeout.connect(func():
			state["target_texture"] = reward_texture
			state["stop_requested"] = true)
	await _await_reels_done()

	var reward_label := str(result.get("reward_label", ""))
	var coins_won := int(result.get("coins_won", 0))
	status_label.text = "You won: %s" % reward_label
	status_label.add_theme_color_override("font_color", Brand.SUCCESS)
	if coins_won > 0:
		_play_coin_burst(coins_won)
	elif main != null:
		var credits_badge: Object = main.get("credits_badge")
		if credits_badge != null:
			credits_badge.bump()
	return true


func _icon_for_reward(key: String) -> Texture2D:
	var spec: Dictionary = REWARD_ICONS.get(key, {})
	var texture: Texture2D = spec.get("texture", SLOT_COIN)
	return texture if texture != null else SLOT_COIN


func _await_reels_done() -> void:
	while true:
		var all_done := true
		for state in reel_states:
			if not state.get("done", false):
				all_done = false
				break
		if all_done:
			return
		await get_tree().process_frame


func _await_spin_result() -> Dictionary:
	var result := {}
	var on_resolved := func(reward_key: String, reward_label: String, coins_won: int):
		result.merge({"ok": true, "reward_key": reward_key, "reward_label": reward_label, "coins_won": coins_won}, true)
	var on_failed := func(message: String):
		result.merge({"ok": false, "message": message}, true)
	CreditsService.spin_resolved.connect(on_resolved, CONNECT_ONE_SHOT)
	CreditsService.credits_failed.connect(on_failed, CONNECT_ONE_SHOT)
	CreditsService.spin()
	var deadline := Time.get_ticks_msec() + 20000
	while result.is_empty() and Time.get_ticks_msec() < deadline:
		await get_tree().process_frame
	if result.is_empty():
		result = {"ok": false, "message": "The spin timed out. Check your connection and try again."}
	if CreditsService.spin_resolved.is_connected(on_resolved):
		CreditsService.spin_resolved.disconnect(on_resolved)
	if CreditsService.credits_failed.is_connected(on_failed):
		CreditsService.credits_failed.disconnect(on_failed)
	return result


func _spin_reel(state: Dictionary) -> void:
	state["spinning"] = true
	var strip: VBoxContainer = state["strip"]
	var icons: Array = state["icons"]
	var step: float = state["step"]
	var speed: float = state["speed"]
	while true:
		var current_speed: float = speed if state["recycles_after_target"] == -1 else speed * 0.45
		strip.position.y -= current_speed * get_process_delta_time()
		if strip.position.y <= -step:
			strip.position.y += step
			var front: TextureRect = icons.pop_front()
			strip.move_child(front, strip.get_child_count() - 1)
			icons.append(front)
			if state["stop_requested"] and state["recycles_after_target"] == -1:
				front.texture = state["target_texture"]
				state["recycles_after_target"] = 0
			else:
				front.texture = REEL_SYMBOLS[randi() % REEL_SYMBOLS.size()]
				if state["recycles_after_target"] >= 0:
					state["recycles_after_target"] += 1
			if state["recycles_after_target"] == 2:
				strip.position.y = 0.0
				break
		await get_tree().process_frame
	state["spinning"] = false
	state["done"] = true


func _play_coin_burst(coins_won: int) -> void:
	if main == null:
		return
	var credits_badge: Control = main.get("credits_badge")
	if credits_badge == null or not is_instance_valid(credits_badge):
		return
	var origin := machine_root.get_global_rect().get_center()
	var target := credits_badge.get_global_rect().get_center()
	var coin_count := clampi(3 + coins_won / 500, 4, 10)
	var flight_time := 0.55
	var stagger := 0.035
	for index in range(coin_count):
		var coin := TextureRect.new()
		coin.texture = SLOT_COIN
		coin.custom_minimum_size = Vector2(16, 16)
		coin.size = Vector2(16, 16)
		coin.top_level = true
		coin.mouse_filter = Control.MOUSE_FILTER_IGNORE
		coin.pivot_offset = Vector2(8, 8)
		var jitter := Vector2(randf_range(-24.0, 24.0), randf_range(-16.0, 16.0))
		coin.global_position = origin + jitter - coin.size * 0.5
		add_child(coin)
		var tween := create_tween()
		tween.tween_interval(index * stagger)
		tween.set_parallel(true)
		tween.tween_property(coin, "global_position", target - coin.size * 0.5, flight_time).set_trans(Tween.TRANS_CUBIC).set_ease(Tween.EASE_IN)
		tween.tween_property(coin, "scale", Vector2(0.6, 0.6), flight_time).set_trans(Tween.TRANS_CUBIC).set_ease(Tween.EASE_IN)
		tween.set_parallel(false)
		tween.tween_callback(coin.queue_free)
	var settle_time := (coin_count - 1) * stagger + flight_time
	get_tree().create_timer(settle_time).timeout.connect(func():
		if is_instance_valid(credits_badge):
			credits_badge.bump())


func _style_spin_button() -> void:
	var normal := StyleBoxFlat.new()
	normal.bg_color = Brand.ROYAL_BLUE
	normal.set_corner_radius_all(8)
	var hover := StyleBoxFlat.new()
	hover.bg_color = Brand.SKY_BLUE
	hover.set_corner_radius_all(8)
	var disabled := StyleBoxFlat.new()
	disabled.bg_color = Color(Brand.ROYAL_BLUE, 0.35)
	disabled.set_corner_radius_all(8)
	spin_button.add_theme_stylebox_override("normal", normal)
	spin_button.add_theme_stylebox_override("hover", hover)
	spin_button.add_theme_stylebox_override("pressed", normal)
	spin_button.add_theme_stylebox_override("disabled", disabled)
	spin_button.add_theme_color_override("font_color", Brand.DARK_TEXT)
	spin_button.add_theme_color_override("font_hover_color", Brand.DARK_TEXT)
	spin_button.add_theme_color_override("font_disabled_color", Color(Brand.DARK_TEXT, 0.7))


func _format_thousands(value: int) -> String:
	var digits := str(absi(value))
	var grouped := ""
	var count := 0
	for index in range(digits.length() - 1, -1, -1):
		grouped = digits[index] + grouped
		count += 1
		if count % 3 == 0 and index != 0:
			grouped = "," + grouped
	return ("-" if value < 0 else "") + grouped


func _format_percent(value: float) -> String:
	if absf(value - roundf(value)) < 0.001:
		return str(int(roundf(value)))
	return "%.1f" % value