using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

//

using System.Runtime.InteropServices;

//using System.Runtime.Serialization;

namespace SharpDisplayManager

{

    /// <summary>

    /// Provide access to our display hardware through MiniDisplay API.

    /// </summary>

    public class Display

    {

		public delegate void OnOpenedHandler(Display aDisplay);

		public event OnOpenedHandler OnOpened;

		public delegate void OnClosedHandler(Display aDisplay);

		public event OnClosedHandler OnClosed;

		//Our display device handle

		IntPtr iDevice;

		//static functions

		public static int TypeCount()

		{

			return MiniDisplayTypeCount();

		}

		public static string TypeName(TMiniDisplayType aType)

		{

			IntPtr ptr = MiniDisplayTypeName(aType);

			string str = Marshal.PtrToStringUni(ptr);

			return str;

		}

        //Constructor

        public Display()

        {

            iDevice = IntPtr.Zero;

        }

        //

        public bool Open(TMiniDisplayType aType)

        {

			if (IsOpen())

			{

				//Already open return an error

				return false;

			}

            iDevice = MiniDisplayOpen(aType);

            bool success = iDevice != IntPtr.Zero;

			if (success)

			{

				//Broadcast opened event

				OnOpened(this);

			}

			return success;

        }

        public void Close()

        {

			if (!IsOpen())

			{

				//Pointless

				return;

			}

			//Controversially clearing our screen before closing

			//Consider moving this up into the UI layer

			Clear(); 

			SwapBuffers();

			//

            MiniDisplayClose(iDevice);

            iDevice = IntPtr.Zero;

			//Broadcast closed event

			OnClosed(this);

        }

        public bool IsOpen()

        {

            return iDevice != IntPtr.Zero;

        }

        public void Clear()

        {

            MiniDisplayClear(iDevice);

        }

        public void Fill()

        {

            MiniDisplayFill(iDevice);

        }

        public void SwapBuffers()

        {

            MiniDisplaySwapBuffers(iDevice);

        }

        public int MaxBrightness()

        {

            return MiniDisplayMaxBrightness(iDevice);

        }

        public int MinBrightness()

        {

            return MiniDisplayMinBrightness(iDevice);

        }

        public void SetBrightness(int aBrightness)

        {

            if (!IsOpen()) return;

            MiniDisplaySetBrightness(iDevice, aBrightness);

        }

        public int WidthInPixels()

        {

            return MiniDisplayWidthInPixels(iDevice);

        }

        public int HeightInPixels()

        {

            return MiniDisplayHeightInPixels(iDevice);

        }

        public void SetPixel(int aX, int aY, uint aValue)

        {

            MiniDisplaySetPixel(iDevice,aX,aY,aValue);

        }

        public void RequestPowerSupplyStatus()

        {

            MiniDisplayRequest(iDevice, TMiniDisplayRequest.EMiniDisplayRequestPowerSupplyStatus);

        }

        public void RequestDeviceId()

        {

            MiniDisplayRequest(iDevice, TMiniDisplayRequest.EMiniDisplayRequestDeviceId);

        }

        public void RequestFirmwareRevision()

        {

            MiniDisplayRequest(iDevice, TMiniDisplayRequest.EMiniDisplayRequestFirmwareRevision);

        }

        public void PowerOn()

        {

            MiniDisplayPowerOn(iDevice);

        }

        public void PowerOff()

        {

            MiniDisplayPowerOff(iDevice);

        }

        public bool SupportPowerOnOff()

        {

            return MiniDisplaySupportPowerOnOff(iDevice);

        }

        public void ShowClock()

        {

            MiniDisplayShowClock(iDevice);

        }

        public void HideClock()

        {

            MiniDisplayHideClock(iDevice);

        }

        public bool SupportClock()

        {

            return MiniDisplaySupportClock(iDevice);

        }

        public bool PowerSupplyStatus()

        {

            bool res = MiniDisplayPowerSupplyStatus(iDevice);

            return res;

        }

        public TMiniDisplayRequest AttemptRequestCompletion()

        {

            return MiniDisplayAttemptRequestCompletion(iDevice);

        }

        public TMiniDisplayRequest CurrentRequest()

        {

            return MiniDisplayCurrentRequest(iDevice);

        }

        public bool IsRequestPending()

        {

            return CurrentRequest() != TMiniDisplayRequest.EMiniDisplayRequestNone;

        }

		//

		public int IconCount(TMiniDisplayIconType aIcon)

		{

			return MiniDisplayIconCount(iDevice,aIcon);

		}

		public int IconStatusCount(TMiniDisplayIconType aIcon)

		{

			return MiniDisplayIconStatusCount(iDevice, aIcon);

		}

		public void SetIconStatus(TMiniDisplayIconType aIcon, int aIndex, int aStatus)

		{

			MiniDisplaySetIconStatus(iDevice, aIcon, aIndex, aStatus);

		}

		public void SetIconOn(TMiniDisplayIconType aIcon, int aIndex)

		{

			MiniDisplaySetIconStatus(iDevice, aIcon, aIndex, IconStatusCount(aIcon) - 1);

		}

		public void SetIconOff(TMiniDisplayIconType aIcon, int aIndex)

		{

			MiniDisplaySetIconStatus(iDevice, aIcon, aIndex, 0);

		}

		public void SetAllIconsStatus(int aStatus)

		{

			foreach (TMiniDisplayIconType icon in Enum.GetValues(typeof(TMiniDisplayIconType)))

			{

				int count=IconCount(icon);

				for (int i = 0; i < count; i++)

				{

					SetIconStatus(icon,i,aStatus);

				}

			}

		}

		/// <summary>

		/// Set all elements of an icon to the given status.

		/// </summary>

		/// <param name="aIcon"></param>

		/// <param name="aStatus"></param>

		public void SetIconStatus(TMiniDisplayIconType aIcon, int aStatus)

		{

			int iconCount = IconCount(aIcon);

			for (int i = 0; i < iconCount; i++)

			{

				SetIconStatus(aIcon, i, aStatus);

			}

		}

		/// <summary>

		/// Set all elements of an icon to be either on or off.

		/// </summary>

		/// <param name="aIcon"></param>

		/// <param name="aOn"></param>		

		public void SetIconOnOff(TMiniDisplayIconType aIcon, bool aOn)

		{

			if (aOn)

			{

				SetIconOn(aIcon);

			}

			else

			{

				SetIconOff(aIcon);

			}

		}

		/// <summary>

		/// Set all elements of an icon to there maximum status.

		/// </summary>

		/// <param name="aIcon"></param>

		public void SetIconOn(TMiniDisplayIconType aIcon)

		{

			int iconCount = IconCount(aIcon);

			for (int i = 0; i < iconCount; i++)

			{

				SetIconStatus(aIcon, i, IconStatusCount(aIcon) - 1);

			}

		}

		/// <summary>

		/// Turn off all elements of an icon.

		/// </summary>

		/// <param name="aIcon"></param>

		public void SetIconOff(TMiniDisplayIconType aIcon)

		{

			int iconCount = IconCount(aIcon);

			for (int i = 0; i < iconCount; i++)

			{

				SetIconStatus(aIcon, i, 0);

			}

		}

        public string Vendor()

        {

            IntPtr ptr = MiniDisplayVendor(iDevice);

            string str = Marshal.PtrToStringUni(ptr);

            return str;

        }

        public string Product()

        {

            IntPtr ptr = MiniDisplayProduct(iDevice);

            string str = Marshal.PtrToStringUni(ptr);

            return str;

        }

        public string SerialNumber()

        {

            IntPtr ptr = MiniDisplaySerialNumber(iDevice);

            string str = Marshal.PtrToStringUni(ptr);

            return str;

        }

        public string DeviceId()

        {

            IntPtr ptr = MiniDisplayDeviceId(iDevice);

            string str = Marshal.PtrToStringAnsi(ptr);

            return str;

        }

        public string FirmwareRevision()

        {

            IntPtr ptr = MiniDisplayFirmwareRevision(iDevice);

            string str = Marshal.PtrToStringAnsi(ptr);

            return str;

        }

        //[Serializable]

        public enum TMiniDisplayType

        {

            EMiniDisplayAutoDetect, /*Not yet implemented*/

            //[EnumMember(Value = "EMiniDisplayFutabaGP1212A01")]

            EMiniDisplayFutabaGP1212A01,

            //[EnumMember(Value = "EMiniDisplayFutabaGP1212A01")]

            EMiniDisplayFutabaGP1212A02

        };

		/// <summary>

		/// 

		/// </summary>

        public enum TMiniDisplayRequest

        {

            EMiniDisplayRequestNone,

            EMiniDisplayRequestDeviceId,

            EMiniDisplayRequestFirmwareRevision,

            EMiniDisplayRequestPowerSupplyStatus

        };

		/// <summary>

		/// Define the various type of icons we support.

		/// For binary compatibility new entries must be added at the end.

		/// </summary>

		public enum TMiniDisplayIconType

		{

			EMiniDisplayIconNetworkSignal=0,

			EMiniDisplayIconInternet,

			EMiniDisplayIconEmail,

			EMiniDisplayIconMute,

			EMiniDisplayIconVolume,

			EMiniDisplayIconVolumeLabel,

			EMiniDisplayIconPlay,

			EMiniDisplayIconPause,

			EMiniDisplayIconRecording

		};

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern IntPtr MiniDisplayOpen(TMiniDisplayType aType);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayClose(IntPtr aDevice);

		[DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

		public static extern int MiniDisplayTypeCount();

		[DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

		public static extern IntPtr MiniDisplayTypeName(TMiniDisplayType aType);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayClear(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayFill(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplaySwapBuffers(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplaySetBrightness(IntPtr aDevice, int aBrightness);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern int MiniDisplayMinBrightness(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern int MiniDisplayMaxBrightness(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern int MiniDisplayWidthInPixels(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern int MiniDisplayHeightInPixels(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern int MiniDisplaySetPixel(IntPtr aDevice, int aX, int aY, uint aValue);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern IntPtr MiniDisplayVendor(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern IntPtr MiniDisplayProduct(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern IntPtr MiniDisplaySerialNumber(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern IntPtr MiniDisplayDeviceId(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern IntPtr MiniDisplayFirmwareRevision(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        [return: MarshalAs(UnmanagedType.I1)]

        public static extern bool MiniDisplayPowerSupplyStatus(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayRequest(IntPtr aDevice, TMiniDisplayRequest aRequest);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern TMiniDisplayRequest MiniDisplayAttemptRequestCompletion(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern TMiniDisplayRequest MiniDisplayCurrentRequest(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayCancelRequest(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayPowerOn(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayPowerOff(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        [return: MarshalAs(UnmanagedType.I1)]

        public static extern bool MiniDisplaySupportPowerOnOff(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayShowClock(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        public static extern void MiniDisplayHideClock(IntPtr aDevice);

        [DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

        [return: MarshalAs(UnmanagedType.I1)]

        public static extern bool MiniDisplaySupportClock(IntPtr aDevice);

		[DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

		public static extern int MiniDisplayIconCount(IntPtr aDevice, TMiniDisplayIconType aIcon);

		[DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

		public static extern int MiniDisplayIconStatusCount(IntPtr aDevice, TMiniDisplayIconType aIcon);

		[DllImport("MiniDisplay.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)]

		public static extern void MiniDisplaySetIconStatus(IntPtr aDevice, TMiniDisplayIconType aIcon, int aIndex, int aStatus);

    }

}