/****************************************************************************
* Copyright 2019 Nreal Techonology Limited. All rights reserved.
*                                                                                                                                                          
* This file is part of NRSDK.                                                                                                          
*                                                                                                                                                           
* https://www.nreal.ai/        
* 
*****************************************************************************/

namespace NRKernal
{
    using System;
    using System.Runtime.InteropServices;

    /// <summary>
    /// The callback method type which will be called when put on or take off nreal glasses. </summary>
    /// <param name="glasses_control_handle"> glasses_control_handle The handle of GlassesControl.</param>
    /// <param name="wearing_status">         wear_or_not , 1: put on glasses . 0: take off glasses.</param>
    /// <param name="user_data">              The custom user data.</param>
    public delegate void NRGlassesControlWearCallback(UInt64 glasses_control_handle, int wearing_status, UInt64 user_data);

    /// <summary>
    /// The callback method type which will be called when plug off nreal glasses. </summary>
    /// <param name="glasses_control_handle"> glasses_control_handle The handle of GlassesControl.</param>
    /// <param name="user_data">              The custom user data.</param>
    public delegate void NRGlassesControlPlugOffCallback(UInt64 glasses_control_handle, UInt64 user_data);

    /// <summary>
    /// The callback method type which will be called when plug off nreal glasses. </summary>
    /// <param name="glasses_control_handle"> glasses_control_handle The handle of GlassesControl.</param>
    /// <param name="user_data">              user_data The custom user data.</param>
    /// <param name="reason">                 The reason of glasses disconnect.</param>
    public delegate void NRGlassesControlNotifyQuitAppCallback(UInt64 glasses_control_handle, IntPtr user_data, GlassesDisconnectReason reason);

    /// <summary> A controller for handling native glasses. </summary>
    public partial class NativeGlassesController
    {
        /// <summary> Handle of the glasses controller. </summary>
        private UInt64 m_GlassesControllerHandle = 0;
        /// <summary> Gets the handle of the glasses controller. </summary>
        /// <value> The glasses controller handle. </value>
        public UInt64 GlassesControllerHandle
        {
            get
            {
                return m_GlassesControllerHandle;
            }
        }

        /// <summary> Creates this object. </summary>
        public void Create()
        {
            NativeResult result = NativeApi.NRGlassesControlCreate(ref m_GlassesControllerHandle);
            NativeErrorListener.Check(result, this, "Create");
        }

        /// <summary> Back, called when the regis glasses wear. </summary>
        /// <param name="callback"> The callback.</param>
        /// <param name="userdata"> The userdata.</param>
        public void RegisGlassesWearCallBack(NRGlassesControlWearCallback callback, ulong userdata)
        {
            NativeResult result = NativeApi.NRGlassesControlSetGlassesWearingCallback(m_GlassesControllerHandle, callback, userdata);
            NativeErrorListener.Check(result, this, "RegisGlassesWearCallBack");
        }

        /// <summary> Gets temprature level. </summary>
        /// <returns> The temprature level. </returns>
        public GlassesTemperatureLevel GetTempratureLevel()
        {
            GlassesTemperatureLevel level = GlassesTemperatureLevel.TEMPERATURE_LEVEL_NORMAL;
            NativeResult result = NativeApi.NRGlassesControlGetTemperatureLevel(m_GlassesControllerHandle, ref level);
            NativeErrorListener.Check(result, this, "GetTempratureLevel");
            return level;
        }

        /// <summary> Back, called when the regis glasses plug out. </summary>
        /// <param name="callback"> The callback.</param>
        /// <param name="userdata"> The userdata.</param>
        public void RegisGlassesPlugOutCallBack(NRGlassesControlPlugOffCallback callback, ulong userdata)
        {
            NativeResult result = NativeApi.NRGlassesControlSetGlassesDisconnectedCallback(m_GlassesControllerHandle, callback, userdata);
            NativeErrorListener.Check(result, this, "RegisGlassesPlugOutCallBack");
        }

        /// <summary> Back, called when the regist glasses event. </summary>
        /// <param name="callback"> The callback.</param>
        public void RegistGlassesEventCallBack(NRGlassesControlNotifyQuitAppCallback callback)
        {
            NativeResult result = NativeApi.NRGlassesControlSetNotifyQuitAppCallback(m_GlassesControllerHandle, callback, 0);
            NativeErrorListener.Check(result, this, "RegistGlassesEventCallBack");
        }

        /// <summary> Starts this object. </summary>
        public void Start()
        {
            NativeResult result = NativeApi.NRGlassesControlStart(m_GlassesControllerHandle);
            NativeErrorListener.Check(result, this, "Start", true);
        }

        /// <summary> Pauses this object. </summary>
        public void Pause()
        {
            NativeResult result = NativeApi.NRGlassesControlPause(m_GlassesControllerHandle);
            NativeErrorListener.Check(result, this, "Pause", true);
        }

        /// <summary> Resumes this object. </summary>
        public void Resume()
        {
            NativeResult result = NativeApi.NRGlassesControlResume(m_GlassesControllerHandle);
            NativeErrorListener.Check(result, this, "Resume", true);
        }

        /// <summary> Stops this object. </summary>
        public void Stop()
        {
            NativeResult result = NativeApi.NRGlassesControlStop(m_GlassesControllerHandle);
            NativeErrorListener.Check(result, this, "Stop");
        }

        /// <summary> Destroys this object. </summary>
        public void Destroy()
        {
            NativeResult result = NativeApi.NRGlassesControlDestroy(m_GlassesControllerHandle);
            NativeErrorListener.Check(result, this, "Destroy");
        }

        private partial struct NativeApi
        {
            /// <summary> Create the GlassesControl object. </summary>
            /// <param name="out_glasses_control_handle"> [in,out] The handle of GlassesControl.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlCreate(ref UInt64 out_glasses_control_handle);

            /// <summary> Start the GlassesControl system. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlStart(UInt64 glasses_control_handle);

            /// <summary> Pause the GlassesControl system. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlPause(UInt64 glasses_control_handle);

            /// <summary> Resume the GlassesControl system. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlResume(UInt64 glasses_control_handle);

            /// <summary> Stop the GlassesControl system. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlStop(UInt64 glasses_control_handle);

            /// <summary> Release memory used by the GlassesControl. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlDestroy(UInt64 glasses_control_handle);

            /// <summary> Nr glasses control get temperature level. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <param name="temperature_level">      [in,out] The temperature level.</param>
            /// <returns> A NativeResult. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlGetTemperatureLevel(UInt64 glasses_control_handle, ref GlassesTemperatureLevel temperature_level);

            /// <summary> Set the callback method when put on or take off glasses. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <param name="data_callback">          The callback method.</param>
            /// <param name="user_data">              The data which will be returned when callback is
            ///                                       triggered.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlSetGlassesWearingCallback(
                    UInt64 glasses_control_handle, NRGlassesControlWearCallback data_callback, UInt64 user_data);

            /// <summary>
            /// Callback, called when the nr glasses control set notify quit application. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <param name="callback">               The callback.</param>
            /// <param name="user_data">              The data which will be returned when callback is
            ///                                       triggered.</param>
            /// <returns> A NativeResult. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlSetNotifyQuitAppCallback(UInt64 glasses_control_handle,
                NRGlassesControlNotifyQuitAppCallback callback, UInt64 user_data);

            /// <summary> Set the callback method when plug off the glasses. </summary>
            /// <param name="glasses_control_handle"> The handle of GlassesControl.</param>
            /// <param name="data_callback">          The callback method.</param>
            /// <param name="user_data">              The data which will be returned when callback is
            ///                                       triggered.</param>
            /// <returns> The result of operation. </returns>
            [DllImport(NativeConstants.NRNativeLibrary)]
            public static extern NativeResult NRGlassesControlSetGlassesDisconnectedCallback(
                    UInt64 glasses_control_handle, NRGlassesControlPlugOffCallback data_callback, UInt64 user_data);
        }
    }
}