using Godot;
using Polonium.Attributes;

// ReSharper disable once CheckNamespace
namespace GlobalClasses;
[ProxyNode]
[GlobalClass]
[Tool]
public partial class MouseControlledCamera : Camera2D
{
    private Vector2 DragStartPosition { get; set; }
    private bool IsDragging { get; set; }
    [Signal]
    public delegate void ZoomInEventHandler();
    [Signal]
    public delegate void ZoomOutEventHandler();

    [Export]
    public MouseButton DragButton { get; set; } = MouseButton.Middle;

    public override void _UnhandledInput(InputEvent @event)
    {
        if (@event is InputEventMouseButton mouseButtonEvent)
        {
            if(mouseButtonEvent.ButtonIndex == MouseButton.WheelUp)
                EmitSignalZoomIn();
            else if(mouseButtonEvent.ButtonIndex == MouseButton.WheelDown)
                EmitSignalZoomOut();
            else if (mouseButtonEvent.ButtonIndex == DragButton)
            {
                IsDragging = mouseButtonEvent.Pressed;
                if(IsDragging)
                    DragStartPosition = GetGlobalMousePosition();
            }
        }
        else if (@event is InputEventMouseMotion mouseMotionEvent && IsDragging)
        {
            Vector2 mousePos = GetGlobalMousePosition();
            Vector2 offset = DragStartPosition - mousePos;
            Position += offset;
            DragStartPosition = mousePos;
        }


    }

}