using System.Numerics;
using DaggerFramework;
using DaggerFramework.Rendering;
using DaggerFramework.SceneGraph;
using DaggerFramework.UI;
using DaggerFramework.Utils;

public class UiLayer : Layer
{
    protected override void OnStart()
    {
        base.OnStart();

        GetResources();
        CreateUiElements();
    }

    protected override void OnUpdate(double dt)
    {
        base.OnUpdate(dt);
        if (Scene is null) return;
        _screenContainer.UpdateRect(Vector2.Zero, Scene.Renderer.WindowSize);
    }

    protected override void OnBeginDraw(Renderer renderer)
    {

    }

    protected override void OnDraw(Renderer renderer)
    {
        _screenContainer.Render(renderer);
    }

    protected override void OnEndDraw(Renderer renderer)
    {

    }

    private void CreateUiElements()
    {
        if (Scene is null) return;

        _screenContainer.UpdateRect(Vector2.Zero, Scene.Renderer.WindowSize);

        var style = new PanelStyle()
        {
            BackgroundColor = new Color(0.2f, 0.2f, 0.2f, 1.0f)
        };

        _panel = new MarginPanel(style)
        {
            ExpandRatio = new Vector2(0.5f, 1f),
            AbsoluteMargin = Vector2.One * 16f
        };
        _screenContainer.AddChild(_panel);

        var exampleText = new TextLabel()
        {
            Font = _defaultFont!,
            FontSize = 20,
            Text = "This Panel will occupy 50% of the screen.\nThis text in particular is inside a panel with an absolute margin of 16px.\nHow cool is that?"
        };

        var contentPanel = new MarginPanel(new PanelStyle()
        {
            BackgroundColor = new Color(0.25f, 0.25f, 0.25f, 1.0f)
        })
        {
            AbsoluteMargin = Vector2.One * 32f
        };

        _panel.AddChild(contentPanel);

        var verticalPanel = new MarginPanel(new PanelStyle()
        {
            BackgroundColor = new Color(0.1f, 0.1f, 0.1f, 1.0f),
        })
        {
            AbsoluteMargin = Vector2.One * 8f,
        };

        contentPanel.AddChild(verticalPanel);
        verticalPanel.AddChild(exampleText);
    }

    private void GetResources()
    {
        ResourceManager.TryGetResource("inter_regular", out _defaultFont);
    }


    private Font? _defaultFont;
    private Container _screenContainer = new();
    private Panel? _panel;

    private Logger _logger = new(nameof(UiLayer));
}