#if UNITY_EDITOR

using UnityEngine;
using UnityEditor;
using System.Collections.Generic;
using Assets.OVR.Scripts;

public class OVRProfiler : EditorWindow
{
	enum TargetPlatform
	{
		OculusGo,
		GearVR,
		SantaCruz,
		OculusRift
	};

	private static List<RangedRecord> mRecords = new List<RangedRecord>();
	private Vector2 mScrollPosition;
	static private TargetPlatform mTargetPlatform;

	[MenuItem("Tools/Oculus/OVR Profiler")]
	static void Init()
	{
		// Get existing open window or if none, make a new one:
		EditorWindow.GetWindow(typeof(OVRProfiler));
#if UNITY_ANDROID
		mTargetPlatform = TargetPlatform.OculusGo;
#else
		mTargetPlatform = TargetPlatform.OculusRift;
#endif
	}

	void OnGUI()
	{
		GUILayout.Label("OVR Profiler", EditorStyles.boldLabel);
		string[] options = new string[]
		{
			"Oculus Go", "Gear VR", "Santa Cruz", "Oculus Rift",
		};
		mTargetPlatform = (TargetPlatform)EditorGUILayout.Popup("Target Oculus Platform", (int)mTargetPlatform, options);

		if (EditorApplication.isPlaying)
		{
			UpdateRecords();
			DrawResults();
		}
		else
		{
			ShowCenterAlignedMessageLabel("Click Run in Unity to view stats.");
		}
	}

	void OnInspectorUpdate()
	{
		Repaint();
	}

	void DrawResults()
	{
		string lastCategory = "";

		mScrollPosition = EditorGUILayout.BeginScrollView(mScrollPosition);

		foreach (RangedRecord record in mRecords)
		{
			// Add separator and label for new category
			if (!record.category.Equals(lastCategory))
			{
				lastCategory = record.category;
				EditorGUILayout.Separator();
				EditorGUILayout.BeginHorizontal();
				GUILayout.Label(lastCategory, EditorStyles.label, GUILayout.Width(200));
				EditorGUILayout.EndHorizontal();
			}

			// Draw records
			EditorGUILayout.BeginHorizontal();
			Rect r = EditorGUILayout.BeginVertical();
			EditorGUI.ProgressBar(r, record.value / (record.max * 2), record.category + " " + record.value.ToString());
			GUILayout.Space(16);
			EditorGUILayout.EndVertical();
			EditorGUILayout.EndHorizontal();

			EditorGUILayout.BeginHorizontal();
			GUILayout.Label(record.message);
			EditorGUILayout.EndHorizontal();

			GUI.enabled = true;

		}

		EditorGUILayout.EndScrollView();
	}

	private void UpdateRecords()
	{
		mRecords.Clear();

		if (mTargetPlatform == TargetPlatform.OculusRift)
		{
			AddRecord("Client Frame CPU Time (ms)", "", UnityStats.frameTime * 1000, 0, 11);
			AddRecord("Render Frame CPU Time (ms)", "", UnityStats.renderTime * 1000, 0, 11);
		}
		else
		{
			// Graphics memory
			long memSizeByte = UnityStats.usedTextureMemorySize + UnityStats.vboTotalBytes;
			AddRecord("Graphics Memory (MB)", "Please use less than 1024 MB of vertex and texture memory.", ConvertBytes(memSizeByte, "MB"), 0, 1024);
		}

		float triVertRec = mTargetPlatform == TargetPlatform.OculusRift ? 1000000 : 100000;
		// Triangle count
		AddRecord("Triangles", "Please use less than 100000 triangles.", UnityStats.triangles, 0, triVertRec);

		// Vertices count
		AddRecord("Vertices", "Please use less than 100000 vertices.", UnityStats.vertices, 0, triVertRec);

		float dcRec = mTargetPlatform == TargetPlatform.OculusRift ? 1000 : 100;
		// Draw call count
		AddRecord("Draw Call", "Please use less than 100 draw calls.", UnityStats.drawCalls, 0, dcRec);
	}

	private string FormatBytes(long bytes, string target)
	{
		return System.String.Format("{0:0.##} {1}", ConvertBytes(bytes, target), target);
	}

	private float ConvertBytes(long bytes, string target)
	{
		string[] Suffix = { "B", "KB", "MB", "GB", "TB" };
		int i;
		double dblSByte = bytes;
		for (i = 0; i < Suffix.Length; i++, bytes /= 1024)
		{
			if (Suffix[i] == target)
				return (float)dblSByte;
			dblSByte = bytes / 1024.0;
		}
		return 0;
	}

	private void ShowCenterAlignedMessageLabel(string message)
	{
		GUILayout.BeginVertical();
		GUILayout.FlexibleSpace();
		GUILayout.BeginHorizontal();
		GUILayout.FlexibleSpace();
		GUILayout.Label(message, EditorStyles.boldLabel);
		GUILayout.FlexibleSpace();
		GUILayout.EndHorizontal();
		GUILayout.FlexibleSpace();
		GUILayout.EndVertical();
	}

	private void AddRecord(string category, string message, float value, float min, float max)
	{
		RangedRecord record = new RangedRecord(category, message, value, min, max);
		mRecords.Add(record);
	}
}

#endif