//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Demonstrates the use of the controller hint system
//
//=============================================================================

using UnityEngine;
using System.Collections;
using Valve.VR;

namespace Valve.VR.InteractionSystem
{
	//-------------------------------------------------------------------------
	public class ControllerHintsExample : MonoBehaviour
	{
		private Coroutine buttonHintCoroutine;
		private Coroutine textHintCoroutine;

		//-------------------------------------------------
		public void ShowButtonHints( Hand hand )
		{
			if ( buttonHintCoroutine != null )
			{
				StopCoroutine( buttonHintCoroutine );
			}
			buttonHintCoroutine = StartCoroutine( TestButtonHints( hand ) );
		}


		//-------------------------------------------------
		public void ShowTextHints( Hand hand )
		{
			if ( textHintCoroutine != null )
			{
				StopCoroutine( textHintCoroutine );
			}
			textHintCoroutine = StartCoroutine( TestTextHints( hand ) );
		}


		//-------------------------------------------------
		public void DisableHints()
		{
			if ( buttonHintCoroutine != null )
			{
				StopCoroutine( buttonHintCoroutine );
				buttonHintCoroutine = null;
			}

			if ( textHintCoroutine != null )
			{
				StopCoroutine( textHintCoroutine );
				textHintCoroutine = null;
			}

			foreach ( Hand hand in Player.instance.hands )
			{
				ControllerButtonHints.HideAllButtonHints( hand );
				ControllerButtonHints.HideAllTextHints( hand );
			}
		}


		//-------------------------------------------------
		// Cycles through all the button hints on the controller
		//-------------------------------------------------
		private IEnumerator TestButtonHints( Hand hand )
		{
			ControllerButtonHints.HideAllButtonHints( hand );

			while ( true )
			{
				ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_ApplicationMenu );
				yield return new WaitForSeconds( 1.0f );
				ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_System );
				yield return new WaitForSeconds( 1.0f );
				ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_Grip );
				yield return new WaitForSeconds( 1.0f );
				ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_SteamVR_Trigger );
				yield return new WaitForSeconds( 1.0f );
				ControllerButtonHints.ShowButtonHint( hand, EVRButtonId.k_EButton_SteamVR_Touchpad );
				yield return new WaitForSeconds( 1.0f );

				ControllerButtonHints.HideAllButtonHints( hand );
				yield return new WaitForSeconds( 1.0f );
			}
		}


		//-------------------------------------------------
		// Cycles through all the text hints on the controller
		//-------------------------------------------------
		private IEnumerator TestTextHints( Hand hand )
		{
			ControllerButtonHints.HideAllTextHints( hand );

			while ( true )
			{
				ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_ApplicationMenu, "Application" );
				yield return new WaitForSeconds( 3.0f );
				ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_System, "System" );
				yield return new WaitForSeconds( 3.0f );
				ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_Grip, "Grip" );
				yield return new WaitForSeconds( 3.0f );
				ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_SteamVR_Trigger, "Trigger" );
				yield return new WaitForSeconds( 3.0f );
				ControllerButtonHints.ShowTextHint( hand, EVRButtonId.k_EButton_SteamVR_Touchpad, "Touchpad" );
				yield return new WaitForSeconds( 3.0f );

				ControllerButtonHints.HideAllTextHints( hand );
				yield return new WaitForSeconds( 3.0f );
			}
		}
	}
}