using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using System.Runtime.InteropServices;
using CUE.NET.Devices.Generic;
using CUE.NET.Devices.Keyboard.Enums;
using CUE.NET.Devices.Keyboard.Keys;
using CUE.NET.Native;

namespace CUE.NET.Devices.Keyboard
{
    public class CorsairKeyboard : AbstractCueDevice, IEnumerable<CorsairKey>
    {
        #region Properties & Fields

        public CorsairKeyboardDeviceInfo KeyboardDeviceInfo { get; }

        private Dictionary<CorsairKeyboardKeyId, CorsairKey> _keys = new Dictionary<CorsairKeyboardKeyId, CorsairKey>();
        public CorsairKey this[CorsairKeyboardKeyId keyId]
        {
            get
            {
                CorsairKey key;
                return _keys.TryGetValue(keyId, out key) ? key : null;
            }
            private set { throw new NotSupportedException(); }
        }

        #endregion

        #region Constructors

        internal CorsairKeyboard(CorsairKeyboardDeviceInfo info)
            : base(info)
        {
            this.KeyboardDeviceInfo = info;

            InitializeKeys();
        }

        #endregion

        #region Methods

        private void InitializeKeys()
        {
            _CorsairLedPositions nativeLedPositions = (_CorsairLedPositions)Marshal.PtrToStructure(_CUESDK.CorsairGetLedPositions(), typeof(_CorsairLedPositions));
            int structSize = Marshal.SizeOf(typeof(_CorsairLedPosition));
            IntPtr ptr = nativeLedPositions.pLedPosition;
            for (int i = 0; i < nativeLedPositions.numberOfLed; i++)
            {
                _CorsairLedPosition ledPosition = Marshal.PtrToStructure<_CorsairLedPosition>(ptr);
                _keys.Add(ledPosition.ledId, new CorsairKey(ledPosition.ledId, GetLed((int)ledPosition.ledId),
                //TODO DarthAffe 19.09.2015: Is something like RectangleD needed? I don't think so ...
                    new RectangleF((float)ledPosition.left, (float)ledPosition.top, (float)ledPosition.width, (float)ledPosition.height)));
                ptr = new IntPtr(ptr.ToInt64() + structSize);
            }
        }

        #region IEnumerable

        public IEnumerator<CorsairKey> GetEnumerator()
        {
            return _keys.Values.GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }

        #endregion

        #endregion
    }
}