@namespace sGBA

@inherits PanelComponent

<root class="@(IsVisible ? "visible" : "")">
	<div class="modal-backdrop" onclick=@HideWithMouse />

	<div class="settings-modal">
		<div class="settings-title">#settings.title</div>
		<div class="settings-subtitle">#settings.sub</div>

		<div class="dialog-body">
			<div class="toggle-list">
				<SettingsToggleRow Label="#settings.classicfeel" Active=@IsClassicFeelFocused [email protected] RingAlpha=@_ringAlpha Hovered=@(() => SelectAction(ClassicFeelAction)) Clicked=@ToggleClassicFeelWithMouse />

				<div class="settings-row-divider" />

				<SettingsToggleRow Label="#settings.smallscreen" Active=@IsSmallScreenFocused [email protected] RingAlpha=@_ringAlpha Hovered=@(() => SelectAction(SmallScreenAction)) Clicked=@ToggleSmallScreenWithMouse />
			</div>
		</div>
	</div>
</root>

@code
{
	private const int ClassicFeelAction = 0;
	private const int SmallScreenAction = 1;

	public static SettingsModal Current { get; private set; }
	public bool IsVisible { get; private set; }

	private int _selectedIndex = ClassicFeelAction;
	private readonly FocusInput _input = new();
	private bool _openedThisFrame;
	private float _ringAlpha;

	private bool IsClassicFeelFocused => _input.UseGamepad && _selectedIndex == ClassicFeelAction;
	private bool IsSmallScreenFocused => _input.UseGamepad && _selectedIndex == SmallScreenAction;

	protected override void OnTreeFirstBuilt()
	{
		Current = this;
	}

	protected override void OnDestroy()
	{
		if (Current == this)
			Current = null;
	}

	public void Show(bool useGamepad = false)
	{
		Current = this;
		IsVisible = true;
		_openedThisFrame = true;
		_selectedIndex = ClassicFeelAction;
		_ringAlpha = 0f;
		_input.Begin(useGamepad);
		Sound.Play("ui.popup.message.open");
		StateHasChanged();
	}

	public void Hide()
	{
		IsVisible = false;
		_ringAlpha = 0f;
		var wasGamepad = _input.UseGamepad;
		_input.End();
		HomeScreen.Current?.FocusSettingsAction(wasGamepad);
		Sound.Play("ui.popup.message.close");
		StateHasChanged();
	}

	private void SelectAction(int action)
	{
		_input.ForceMouseMode();
		_selectedIndex = action;
	}

	private void HideWithMouse()
	{
		_input.ForceMouseMode();
		Hide();
	}

	private void ToggleClassicFeel(bool playSound = true)
	{
		if (playSound)
			Sound.Play("ui.button.press");

		GamePreferences.SetReproduceClassicFeel(!GamePreferences.ReproduceClassicFeel);
		StateHasChanged();
	}

	private void ToggleClassicFeelWithMouse()
	{
		_input.ForceMouseMode();
		ToggleClassicFeel();
	}

	private void ToggleSmallScreen(bool playSound = true)
	{
		if (playSound)
			Sound.Play("ui.button.press");

		GamePreferences.SetDisplayWithSmallScreen(!GamePreferences.DisplayWithSmallScreen);
		StateHasChanged();
	}

	private void ToggleSmallScreenWithMouse()
	{
		_input.ForceMouseMode();
		ToggleSmallScreen();
	}

	private void SetGamepadMode() => _input.ForceGamepadMode();

	protected override void OnUpdate()
	{
		if (!IsVisible)
			return;
		if (new Game.Overlay().IsOpen)
			return;

		float nextRingAlpha = MathF.Min(1f, _ringAlpha + Time.Delta / 0.16f);
		if (MathF.Abs(nextRingAlpha - _ringAlpha) > 0.001f)
		{
			_ringAlpha = nextRingAlpha;
			StateHasChanged();
		}

		if (_openedThisFrame)
		{
			_openedThisFrame = false;
			return;
		}

		var nav = _input.TickRepeating();
		if (nav.Up) NavigateUp();
		if (nav.Down) NavigateDown();

		if (Input.Pressed("GBA_A"))
		{
			SetGamepadMode();
			Sound.Play("ui.button.press");

			if (_selectedIndex == ClassicFeelAction)
				ToggleClassicFeel(playSound: false);
			else
				ToggleSmallScreen(playSound: false);
		}

		if (Input.Pressed("GBA_B"))
		{
			SetGamepadMode();
			Sound.Play("ui.button.press");
			Hide();
		}
	}

	private void NavigateUp()
	{
		SetGamepadMode();
		if (_selectedIndex > ClassicFeelAction)
		{
			_selectedIndex--;
			Sound.Play("ui.button.over");
		}
	}

	private void NavigateDown()
	{
		SetGamepadMode();
		if (_selectedIndex < SmallScreenAction)
		{
			_selectedIndex++;
			Sound.Play("ui.button.over");
		}
	}

	protected override int BuildHash()
	{
		return HashCode.Combine(IsVisible, _selectedIndex, _input.UseGamepad, _openedThisFrame, _ringAlpha, GamePreferences.ReproduceClassicFeel, GamePreferences.DisplayWithSmallScreen);
	}
}