@using Sandbox;
@using Sandbox.UI;
@inherits PanelComponent
@namespace Sandbox

<root>
    @if (!string.IsNullOrEmpty(_flashClass))
    {
        <div class="screen-flash @_flashClass">
            @if (!string.IsNullOrEmpty(_flashText))
            {
                <div class="flash-text">@_flashText</div>
            }
        </div>
    }
</root>

@code {
    public static ScreenFlash Instance { get; private set; }
    string _flashClass = "";
    string _flashText  = "";
    float  _flashEndsAt = 0f;
    protected override void OnStart()
    {
        Instance = this;
    }
	protected override void OnUpdate()
	{
		 if (!string.IsNullOrEmpty(_flashClass))
		{
			if (Time.Now >= _flashEndsAt)
			{
				Log.Info($"Flash clearing: was {_flashClass}");
				_flashClass = "";
				_flashText  = "";
				StateHasChanged();
			}
			else
			{
				// Keep component updated while flash is active
				//StateHasChanged();
			}
		}
	}

    // Generic flash — pass any css class
    public void Flash(string cssClass, float duration, string text = "")
    {
    	Log.Info($"Flash called: {cssClass} for {duration}s, text='{text}'");

        _flashClass  = cssClass;
        _flashText   = text;
        _flashEndsAt = Time.Now + duration;
       StateHasChanged();
    }

    // Convenience shorthands    public void BossSpawn()  => Flash("flash-boss-spawn",  0.8f);
 	public void BossSpawn()  => Flash("flash-boss-spawn",  0.8f, $"Boss has spawned!");
    public void BossDeath()  => Flash("flash-boss-death",  0.6f);
    public void WaveStart(int wave) => Flash("flash-wave-start", 1.0f, $"WAVE {wave}");
    public void NewBest()    => Flash("flash-new-best",    1.0f, "🏆 NEW BEST!");
    public void GameOver()   => Flash("flash-game-over",   0.8f);

    protected override int BuildHash() => 
        System.HashCode.Combine(_flashClass, _flashText, _flashEndsAt);
}