/*
 * Copyright(c) 2017 Samsung Electronics Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

namespace Tizen.NUI
{

    using System;
    using System.Runtime.InteropServices;


    internal class Image : BaseHandle
    {
        private global::System.Runtime.InteropServices.HandleRef swigCPtr;

        internal Image(global::System.IntPtr cPtr, bool cMemoryOwn) : base(NDalicPINVOKE.Image_SWIGUpcast(cPtr), cMemoryOwn)
        {
            swigCPtr = new global::System.Runtime.InteropServices.HandleRef(this, cPtr);
        }

        internal static global::System.Runtime.InteropServices.HandleRef getCPtr(Image obj)
        {
            return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
        }

        protected override void Dispose(DisposeTypes type)
        {
            if (disposed)
            {
                return;
            }

            if (type == DisposeTypes.Explicit)
            {
                //Called by User
                //Release your own managed resources here.
                //You should release all of your own disposable objects here.

            }

            //Release your own unmanaged resources here.
            //You should not access any managed member here except static instance.
            //because the execution order of Finalizes is non-deterministic.

            if (swigCPtr.Handle != global::System.IntPtr.Zero)
            {
                if (swigCMemOwn)
                {
                    swigCMemOwn = false;
                    NDalicPINVOKE.delete_Image(swigCPtr);
                }
                swigCPtr = new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero);
            }

            base.Dispose(type);
        }



        /**
          * @brief Event arguments that passed via Uploaded signal
          *
          */
        /// <since_tizen> 3 </since_tizen>
        public class UploadedEventArgs : EventArgs
        {
            private Image _image;
            /**
              * @brief Image - is the image data that gets uploaded to GL.
              *
              */
            /// <since_tizen> 3 </since_tizen>
            public Image Image
            {
                get
                {
                    return _image;
                }
                set
                {
                    _image = value;
                }
            }
        }

        [UnmanagedFunctionPointer(CallingConvention.StdCall)]
        private delegate void UploadedEventCallbackDelegate(IntPtr image);
        private DaliEventHandler<object, UploadedEventArgs> _imageUploadedEventHandler;
        private UploadedEventCallbackDelegate _imageUploadedEventCallbackDelegate;

        /**
          * @brief Event for Uploaded signal which can be used to subscribe/unsubscribe the event handler
          * provided by the user. Uploaded signal is emitted when the image data gets uploaded to GL.
          */
        public event DaliEventHandler<object, UploadedEventArgs> Uploaded
        {
            add
            {
                lock (this)
                {
                    // Restricted to only one listener
                    if (_imageUploadedEventHandler == null)
                    {
                        _imageUploadedEventHandler += value;

                        _imageUploadedEventCallbackDelegate = new UploadedEventCallbackDelegate(OnUploaded);
                        this.UploadedSignal().Connect(_imageUploadedEventCallbackDelegate);
                    }
                }
            }

            remove
            {
                lock (this)
                {
                    if (_imageUploadedEventHandler != null)
                    {
                        this.UploadedSignal().Disconnect(_imageUploadedEventCallbackDelegate);
                    }

                    _imageUploadedEventHandler -= value;
                }
            }
        }

        // Callback for Image UploadedSignal
        private void OnUploaded(IntPtr data)
        {
            UploadedEventArgs e = new UploadedEventArgs();

            // Populate all members of "e" (UploadedEventArgs) with real data
            e.Image = Image.GetImageFromPtr(data);

            if (_imageUploadedEventHandler != null)
            {
                //here we send all data to user event handlers
                _imageUploadedEventHandler(this, e);
            }
        }


        public static Image GetImageFromPtr(global::System.IntPtr cPtr)
        {
            Image ret = new Image(cPtr, false);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }


        public Image() : this(NDalicPINVOKE.new_Image__SWIG_0(), true)
        {
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
        }

        public Image(Image handle) : this(NDalicPINVOKE.new_Image__SWIG_1(Image.getCPtr(handle)), true)
        {
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
        }

        public Image Assign(Image rhs)
        {
            Image ret = new Image(NDalicPINVOKE.Image_Assign(swigCPtr, Image.getCPtr(rhs)), false);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        public static Image DownCast(BaseHandle handle)
        {
            Image ret =  Registry.GetManagedBaseHandleFromNativePtr(handle) as Image;
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        public uint GetWidth()
        {
            uint ret = NDalicPINVOKE.Image_GetWidth(swigCPtr);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        public uint GetHeight()
        {
            uint ret = NDalicPINVOKE.Image_GetHeight(swigCPtr);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

        public ImageSignal UploadedSignal()
        {
            ImageSignal ret = new ImageSignal(NDalicPINVOKE.Image_UploadedSignal(swigCPtr), false);
            if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
            return ret;
        }

    }

}