/*
* Copyright (c) 2016 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.
*
*/

using System;
using System.Runtime.InteropServices;
using Dali;
using Dali.Constants;

namespace ImageViewExample
{

  class Example
  {
    public static void Log(string str)
    {
      Console.WriteLine("[DALI C# SAMPLE] " + str);
    }

    private Dali.Application _application;
    private Animation _animation;
    private ImageView _imageView;
    private bool _isAniFinised = true;
    private Layer layer, _layer1, _layer2;
    private PushButton _pushButton1, _pushButton2;
    private Stage stage;

    public Example(Dali.Application application)
    {
      _application = application;
      _application.Initialized += Initialize;
    }

    public void Initialize(object source, NUIApplicationInitEventArgs e)
    {
      Log("Customized Application Initialize event handler");
      stage = Stage.Instance;
      stage.BackgroundColor = Color.Cyan;
      stage.Touch += OnStageTouched;
      stage.Wheel += OnStageWheelMoved;
      stage.Key += OnStageKeyPressed;
      //stage.EventProcessingFinished += OnStageEventProcessingFinished;

      layer = stage.GetDefaultLayer();
      _layer1 = new Layer();
      _layer2 = new Layer();
      stage.AddLayer(_layer1);
      stage.AddLayer(_layer2);
      Log("_layer1.Behavior =" + _layer1.Behavior );
      if( _layer1.Behavior == Layer.LayerBehavior.LAYER_UI )
      {
        _layer1.Behavior = Layer.LayerBehavior.LAYER_2D;
        Log("again _layer1.Behavior =" + _layer1.Behavior );
      }
      // Add a ImageView to the stage
      _imageView = new ImageView();
      _imageView.ResourceUrl = "./images/gallery-3.jpg";
      _imageView.ParentOrigin = ParentOrigin.Center;
      _imageView.AnchorPoint = AnchorPoint.Center;
      _imageView.PixelArea = new Vector4(0.0f, 0.0f, 0.5f, 0.5f);
      //_imageView.SetResizePolicy(ResizePolicyType.USE_NATURAL_SIZE, DimensionType.ALL_DIMENSIONS);
      layer.Add(_imageView);

      _pushButton1 = new PushButton();
      _pushButton1.ParentOrigin = ParentOrigin.BottomLeft;
      _pushButton1.AnchorPoint = AnchorPoint.BottomLeft;
      _pushButton1.LabelText = "start animation";
      _pushButton1.Position = new Vector3(0.0f, stage.Size.Height * 0.1f, 0.0f);
      _pushButton1.Clicked += OnPushButtonClicked1;
      _layer1.Add(_pushButton1);

      _pushButton2 = new PushButton();
      _pushButton2.ParentOrigin = ParentOrigin.BottomLeft;
      _pushButton2.AnchorPoint = AnchorPoint.BottomLeft;
      _pushButton2.LabelText = "reload image with same URL";
      _pushButton2.Position = new Vector3(0.0f, stage.Size.Height * 0.2f, 0.0f);
      _pushButton2.Clicked += OnPushButtonClicked2;
      _layer2.Add(_pushButton2);

    }

    public bool OnPushButtonClicked2(object sender, Button.ClickedEventArgs e)
    {
      if( _imageView )
      {
        Log("OnPushButtonClicked2()!");
        layer.Remove(_imageView);
        _imageView = new ImageView();
        _imageView.ResourceUrl = "./images/gallery-3.jpg";
        _imageView.ParentOrigin = ParentOrigin.Center;
        _imageView.AnchorPoint = AnchorPoint.Center;
        _imageView.PixelArea = new Vector4(0.0f, 0.0f, 0.5f, 0.5f);
        //_imageView.SetResizePolicy(ResizePolicyType.USE_NATURAL_SIZE, DimensionType.ALL_DIMENSIONS);
        layer.Add(_imageView);
      }

      return true;
    }


    public bool OnPushButtonClicked1(object sender, Button.ClickedEventArgs e)
    {
      if( _isAniFinised == true )
      {
        _isAniFinised = false;
        Log("OnPushButtonClicked1()!");

        // Create a new _animation
        if( _animation )
        {
          //_animation.Stop(Dali.Constants.Animation.EndAction.Stop);
          _animation.Reset();
        }

        _animation = new Animation();
        _animation.StartTime = 0;
        _animation.EndTime = 1000;
        _animation.TargetProperty = "PixelArea";
        _animation.Destination = new Vector4(0.5f, 0.0f, 0.5f, 0.5f);
        _animation.AnimateTo(_imageView);

        _animation.StartTime = 1000;
        _animation.EndTime = 2000;
        _animation.TargetProperty = "PixelArea";
        _animation.Destination = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
        _animation.AnimateTo(_imageView);

        _animation.StartTime = 2000;
        _animation.EndTime = 3000;
        _animation.TargetProperty = "PixelArea";
        _animation.Destination = new Vector4(0.0f, 0.0f, 1.0f, 1.0f);
        _animation.AnimateTo(_imageView);

        _animation.StartTime = 3000;
        _animation.EndTime = 4000;
        _animation.TargetProperty = "PixelArea";
        _animation.Destination = new Vector4(0.5f, 0.5f, 0.5f, 0.5f);
        _animation.AnimateTo(_imageView);

        _animation.StartTime = 4000;
        _animation.EndTime = 6000;
        _animation.TargetProperty = "Size";
        KeyFrames _keyFrames = new KeyFrames();
        _keyFrames.Add(0.0f, new Size3D(0.0f, 0.0f, 0.0f) );
        _keyFrames.Add(0.3f, new Size3D( (stage.Size * 0.7f) ) );
        _keyFrames.Add(1.0f, new Size3D( stage.Size ) );
        _animation.AnimateBetween(_imageView, _keyFrames, Animation.Interpolation.Linear);

        _animation.EndAction = Animation.EndActions.Discard;

        // Connect the signal callback for animaiton finished signal
        _animation.Finished += AnimationFinished;
        _animation.Finished += AnimationFinished2;

        // Play the _animation
        _animation.Play();
      }

      return true;
    }

    // Callback for _animation finished signal handling
    public void AnimationFinished(object sender, EventArgs e)
    {
        Log("AnimationFinished()!");
    }

    // Callback for second _animation finished signal handling
    public void AnimationFinished2(object sender, EventArgs e)
    {
      Log("AnimationFinished2()!");
      if(_animation)
      {
        Log("Duration= " + _animation.Duration);
        Log("EndAction= " + _animation.EndAction);
        _isAniFinised = true;
      }
    }

    public void OnStageEventProcessingFinished(object sender, EventArgs e)
    {
      Log("OnStageEventProcessingFinished()!");
      if( e != null)
      {
        Log("e != null !");
      }
    }

    public void OnStageKeyPressed(object sender, Stage.KeyEventArgs e)
    {
      Log("OnStageKeyEventOccured()!");
      Log("keyPressedName=" + e.Key.KeyPressedName);
      Log("state=" + e.Key.State);
    }

    public void OnStageWheelMoved(object sender, Stage.WheelEventArgs e)
    {
      Log("OnStageWheelEventOccured()!");
      Log("direction=" + e.Wheel.Direction);
      Log("type=" + e.Wheel.Type);
    }

    // Callback for stage touched signal handling
    public void OnStageTouched(object sender, Stage.TouchEventArgs e)
    {
      Log("OnStageTouched()! e.TouchData.GetState(0)=" + e.Touch.GetState(0));
    }

    public void MainLoop()
    {
      _application.MainLoop ();
    }

    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main(string[] args)
    {
      Log("Main() called!");

      Example example = new Example(Application.NewApplication());
      example.MainLoop ();
    }
  }
}