using UnityEngine;
using VR = UnityEngine.VR;

/// <summary>
/// Toggles an on-screen debug graph with VR rendering and performance statistics.
/// </summary>
public class ARG_OVRDebugGraph : MonoBehaviour
{
	public enum DebugPerfMode
	{
		DEBUG_PERF_OFF,         // data still being collected, just not displayed
		DEBUG_PERF_RUNNING,     // display continuously changing graph
		DEBUG_PERF_FROZEN,      // no new data collection, but displayed
		DEBUG_PERF_MAX,
	}

	/// <summary>
	/// The current display mode.
	/// </summary>
	public DebugPerfMode debugMode = DebugPerfMode.DEBUG_PERF_OFF;

	/// <summary>
	/// The gamepad button that will toggle the display mode.
	/// </summary>
	public OVRGamepadController.Button toggleButton = OVRGamepadController.Button.Start;

	/// <summary>
	/// Initialize the debug mode
	/// </summary>
	void Start()
	{
		if (!OVRManager.isHmdPresent)
		{
			enabled = false;
			return;
		}

		OVRPlugin.debugDisplay = (debugMode != DebugPerfMode.DEBUG_PERF_OFF);
		OVRPlugin.collectPerf = (debugMode != DebugPerfMode.DEBUG_PERF_FROZEN);
	}

	/// <summary>
	/// Check input and toggle the debug graph.
	/// See the input mapping setup in the Unity Integration guide.
	/// </summary>
	void Update()
	{
		// NOTE: some of the buttons defined in OVRGamepadController.Button are not available on the Android game pad controller
		if (OVRGamepadController.GPC_GetButtonDown( toggleButton ))
		{
			Debug.Log(" TOGGLE GRAPH ");

			//*************************
			// toggle the debug graph .. off -> running -> paused
			//*************************
			switch (debugMode)
			{
				case DebugPerfMode.DEBUG_PERF_OFF:
					debugMode = DebugPerfMode.DEBUG_PERF_RUNNING;
					break;
				case DebugPerfMode.DEBUG_PERF_RUNNING:
					debugMode = DebugPerfMode.DEBUG_PERF_FROZEN;
					break;
				case DebugPerfMode.DEBUG_PERF_FROZEN:
					debugMode = DebugPerfMode.DEBUG_PERF_OFF;
					break;
			}
			
			// Turn on/off debug graph
			OVRPlugin.debugDisplay = (debugMode != DebugPerfMode.DEBUG_PERF_OFF);
			OVRPlugin.collectPerf = (debugMode == DebugPerfMode.DEBUG_PERF_FROZEN);
		}
	}
}

OVROverlay