#if UNITY_4_6 || UNITY_4_7 || UNITY_4_8 || UNITY_5 || UNITY_5_4_OR_NEWER

	#define UNITY_FEATURE_UGUI

#endif



using UnityEngine;

#if UNITY_FEATURE_UGUI

using UnityEngine.UI;

using System.Collections;

using System.Collections.Generic;



//-----------------------------------------------------------------------------

// Copyright 2015-2017 RenderHeads Ltd.  All rights reserverd.

//-----------------------------------------------------------------------------



namespace RenderHeads.Media.AVProVideo.Demos

{

	public class SampleApp_Multiple : MonoBehaviour

	{

		public string m_videoPath = "BigBuckBunny_360p30.mp4";

		private int			m_NumVideosAdded = 0;



		List<DisplayUGUI>	m_aAddedVideos = new List<DisplayUGUI>();

		



		void Update()

		{

#if UNITY_ANDROID

			// To handle 'back' button on Android devices

			if (Input.GetKeyDown(KeyCode.Escape))

			{

				Application.Quit();

			}

#endif



			foreach( DisplayUGUI gui in m_aAddedVideos )

			{

				if( gui.gameObject != null && gui.gameObject.activeSelf == false && 

					gui._mediaPlayer != null && gui._mediaPlayer.Control != null && ( gui._mediaPlayer.Control.IsPlaying() ) )

				{

					gui.gameObject.SetActive( true );

				}

			}

		}



		private void UpdateVideosLayout()

		{

			GameObject canvasPanel = GameObject.Find("Canvas/Panel");

			RectTransform canvasRectTransform = ( canvasPanel ) ? canvasPanel.GetComponent<RectTransform>() : null;

			if( canvasRectTransform )

			{

				Vector2 canvasSize = canvasRectTransform.sizeDelta;

				Vector2 halfCanvasSize = new Vector2( canvasSize.x * 0.5f, canvasSize.y * 0.5f );



				int iNumMovies = m_aAddedVideos.Count;

				int iNumColRows = Mathf.CeilToInt (Mathf.Sqrt( iNumMovies ));



				float fWidth = (1.0f / iNumColRows) * canvasSize.x;

				float fHeight = (1.0f / iNumColRows) * canvasSize.y;



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

				{

					DisplayUGUI gui = m_aAddedVideos[ i ];



					int x = i % iNumColRows;

					int y = i / iNumColRows;



					gui.rectTransform.anchoredPosition = new Vector2( ((fWidth * x) - halfCanvasSize.x), ((fHeight * -y) + halfCanvasSize.y) );

					gui.rectTransform.sizeDelta = new Vector2( fWidth, fHeight );

				}

			}

		}



		

		public void AddVideoClicked()

		{

			++m_NumVideosAdded;



			// New media player

			GameObject newMediaPlayerGameObject = new GameObject( "AVPro MediaPlayer " + m_NumVideosAdded.ToString() );

			MediaPlayer newMediaPlayer = newMediaPlayerGameObject.AddComponent<MediaPlayer>();

			newMediaPlayer.m_VideoPath = m_videoPath;

			newMediaPlayer.m_AutoStart = true;

			newMediaPlayer.m_Loop = true;

			newMediaPlayer.SetGuiPositionFromVideoIndex( m_NumVideosAdded - 1 );

			newMediaPlayer.SetDebugGuiEnabled( m_NumVideosAdded < 5 );



			// New uGUI object

			GameObject canvasPanel = GameObject.Find("Canvas/Panel");

			if( canvasPanel != null )

			{

				// New game object, and make it a child of the canvas panel

				GameObject newGuiGameObject = new GameObject( "AVPro Video uGUI " + m_NumVideosAdded.ToString() );

				newGuiGameObject.transform.parent = canvasPanel.transform;

				newGuiGameObject.SetActive( false );



				// Add the components

				newGuiGameObject.AddComponent<RectTransform>();

				newGuiGameObject.AddComponent<CanvasRenderer>();



				// Add the DisplayUGUI;

				DisplayUGUI newGuiObject = newGuiGameObject.AddComponent<DisplayUGUI>();

				newGuiObject._mediaPlayer = newMediaPlayer;

				newGuiObject._scaleMode = ScaleMode.StretchToFill;

				newGuiObject.rectTransform.localScale = Vector3.one; 

				newGuiObject.rectTransform.pivot = new Vector2( 0.0f, 1.0f );

				m_aAddedVideos.Add( newGuiObject );



				// Update layout

				UpdateVideosLayout();

			}

		}



		public void RemoveVideoClicked()

		{

			if (m_aAddedVideos.Count > 0)

			{

				// Pick a random element to remove

				int index = Random.Range(0, m_aAddedVideos.Count);

				DisplayUGUI gui = m_aAddedVideos[index];



				// Stop and destroy the MediaPlayer

				if (gui._mediaPlayer != null)

				{

					gui._mediaPlayer.CloseVideo();

					GameObject.Destroy(gui._mediaPlayer.gameObject);

					gui._mediaPlayer = null;

					

				}

				// Destroy the Display object

				GameObject.Destroy(gui.gameObject);



				// Update variables

				m_aAddedVideos.RemoveAt(index);

				m_NumVideosAdded--;

			}

		}



		void OnDestroy()

		{

			foreach( DisplayUGUI gui in m_aAddedVideos )

			{

				if( gui._mediaPlayer )

				{

					gui._mediaPlayer = null;

				}

			}

			m_aAddedVideos.Clear();

		}

	}

}

#endif