using System;
using System.Runtime.InteropServices;

namespace Essgee.Utilities.XInput
{
	/* https://msdn.microsoft.com/en-us/library/windows/desktop/microsoft.directx_sdk.reference.xinput_gamepad%28v=vs.85%29.aspx */
	[StructLayout(LayoutKind.Explicit)]
	public struct XInputGamepad
	{
		[FieldOffset(0)]
		ushort wButtons;
		[FieldOffset(2)]
		public byte bLeftTrigger;
		[FieldOffset(3)]
		public byte bRightTrigger;
		[FieldOffset(4)]
		public short sThumbLX;
		[FieldOffset(6)]
		public short sThumbLY;
		[FieldOffset(8)]
		public short sThumbRX;
		[FieldOffset(10)]
		public short sThumbRY;

		public const int LeftThumbDeadzone = 7849;
		public const int RightThumbDeadzone = 8689;
		public const int TriggerThreshold = 30;

		public Buttons Buttons { get { return (Buttons)wButtons; } }
	}

	[Flags]
	public enum Buttons
	{
		None = 0x0000,
		DPadUp = 0x0001,
		DPadDown = 0x0002,
		DPadLeft = 0x0004,
		DPadRight = 0x0008,
		Start = 0x0010,
		Back = 0x0020,
		LeftThumb = 0x0040,
		RightThumb = 0x0080,
		LeftShoulder = 0x0100,
		RightShoulder = 0x0200,
		A = 0x1000,
		B = 0x2000,
		X = 0x4000,
		Y = 0x8000
	}
}