using UnityEngine;

namespace Gaia
{
	public class FrameRateManager : MonoBehaviour
	{
		public bool m_showFPS = true;

		public bool m_showGUI = true;

		public bool m_autoQualityManagement = true;

		public float m_autoCheckInterval = 10f;

		public int m_targetFrameRate = 60;

		public int m_fontSize = 25;

		private float m_autoCheckTimeLeft;

		private int m_currentQuality;

		private int m_maxQuality = 1;

		private string[] m_qualityNames;

		private float m_fpsUpdateInterval = 0.5f;

		private float m_fpsAccum;

		private int m_fpsFrames;

		private float m_fpsTimeLeft;

		private float m_fpsValue;

		private string m_fpsValueStr = string.Empty;

		private GUIStyle m_fpsStyle = new GUIStyle();

		private GUIStyle m_fpsShadowStyle = new GUIStyle();

		private Rect m_fpsLocation = new Rect(5f, 5f, 100f, 25f);

		private Rect m_fpsShadowLocation = new Rect(6f, 6f, 100f, 25f);

		private void Start()
		{
			Application.targetFrameRate = m_targetFrameRate;
			m_maxQuality = QualitySettings.names.Length - 1;
			m_qualityNames = QualitySettings.names;
			m_currentQuality = QualitySettings.GetQualityLevel();
			m_autoCheckTimeLeft = m_autoCheckInterval;
			Debug.Log("Current quality is " + m_qualityNames[m_currentQuality]);
			m_fpsStyle.fontSize = m_fontSize;
			m_fpsShadowStyle.fontSize = m_fontSize;
			m_fpsTimeLeft = m_fpsUpdateInterval;
			m_fpsLocation = new Rect(Screen.width - 250, 5f, 100f, 25f);
			m_fpsShadowLocation = new Rect(Screen.width - 250 + 1, 6f, 100f, 25f);
		}

		private void OnGUI()
		{
			if (!m_showFPS && !m_showGUI)
			{
				return;
			}
			if (m_showFPS)
			{
				GUI.Label(m_fpsShadowLocation, m_fpsValueStr, m_fpsShadowStyle);
				GUI.Label(m_fpsLocation, m_fpsValueStr, m_fpsStyle);
			}
			if (!m_showGUI)
			{
				return;
			}
			GUILayout.BeginVertical();
			for (int i = 0; i <= m_maxQuality; i++)
			{
				if (GUILayout.Button(m_qualityNames[i]))
				{
					QualitySettings.SetQualityLevel(i, applyExpensiveChanges: true);
					m_currentQuality = i;
					UpdateQuality();
					m_autoQualityManagement = false;
				}
			}
			GUILayout.EndVertical();
		}

		private void Update()
		{
			m_fpsTimeLeft -= Time.deltaTime;
			m_fpsAccum += Time.timeScale / Time.deltaTime;
			m_fpsFrames++;
			if (m_fpsTimeLeft <= 0f)
			{
				m_fpsValue = m_fpsAccum / (float)m_fpsFrames;
				if (m_fpsValue < 30f)
				{
					m_fpsStyle.normal.textColor = Color.yellow;
				}
				else if (m_fpsValue < 10f)
				{
					m_fpsStyle.normal.textColor = Color.red;
				}
				else
				{
					m_fpsStyle.normal.textColor = Color.green;
				}
				m_fpsValueStr = $"{m_fpsValue:f0} {m_qualityNames[m_currentQuality].Substring(0, 3)}";
				m_fpsTimeLeft = m_fpsUpdateInterval;
				m_fpsAccum = 0f;
				m_fpsFrames = 0;
			}
			if (!m_autoQualityManagement)
			{
				return;
			}
			m_autoCheckTimeLeft -= Time.deltaTime;
			if (m_autoCheckTimeLeft < 0f)
			{
				if (m_fpsValue + 10f >= (float)m_targetFrameRate)
				{
					IncreaseQuality();
				}
				else if (m_fpsValue - 10f <= (float)m_targetFrameRate)
				{
					DecreaseQuality();
				}
				m_autoCheckTimeLeft = m_autoCheckInterval;
			}
		}

		private void UpdateQuality()
		{
			if (QualitySettings.GetQualityLevel() != m_currentQuality)
			{
				Debug.Log("Changing quality to " + m_qualityNames[m_currentQuality]);
				switch (m_currentQuality)
				{
				case 0:
					Terrain.activeTerrain.treeDistance = 250f;
					Terrain.activeTerrain.treeBillboardDistance = 30f;
					Terrain.activeTerrain.treeCrossFadeLength = 5f;
					Terrain.activeTerrain.treeMaximumFullLODCount = 5;
					Terrain.activeTerrain.detailObjectDistance = 40f;
					Terrain.activeTerrain.detailObjectDensity = 0.1f;
					Terrain.activeTerrain.heightmapPixelError = 20f;
					Terrain.activeTerrain.heightmapMaximumLOD = 1;
					Terrain.activeTerrain.basemapDistance = 100f;
					break;
				case 1:
					Terrain.activeTerrain.treeDistance = 500f;
					Terrain.activeTerrain.treeBillboardDistance = 50f;
					Terrain.activeTerrain.treeCrossFadeLength = 10f;
					Terrain.activeTerrain.treeMaximumFullLODCount = 10;
					Terrain.activeTerrain.detailObjectDistance = 50f;
					Terrain.activeTerrain.detailObjectDensity = 0.25f;
					Terrain.activeTerrain.heightmapPixelError = 10f;
					Terrain.activeTerrain.heightmapMaximumLOD = 1;
					Terrain.activeTerrain.basemapDistance = 250f;
					break;
				case 2:
					Terrain.activeTerrain.treeDistance = 650f;
					Terrain.activeTerrain.treeBillboardDistance = 75f;
					Terrain.activeTerrain.treeCrossFadeLength = 25f;
					Terrain.activeTerrain.treeMaximumFullLODCount = 20;
					Terrain.activeTerrain.detailObjectDistance = 60f;
					Terrain.activeTerrain.detailObjectDensity = 0.4f;
					Terrain.activeTerrain.heightmapPixelError = 8f;
					Terrain.activeTerrain.heightmapMaximumLOD = 0;
					Terrain.activeTerrain.basemapDistance = 500f;
					break;
				case 3:
					Terrain.activeTerrain.treeDistance = 800f;
					Terrain.activeTerrain.treeBillboardDistance = 100f;
					Terrain.activeTerrain.treeCrossFadeLength = 40f;
					Terrain.activeTerrain.treeMaximumFullLODCount = 30;
					Terrain.activeTerrain.detailObjectDistance = 80f;
					Terrain.activeTerrain.detailObjectDensity = 0.7f;
					Terrain.activeTerrain.heightmapPixelError = 5f;
					Terrain.activeTerrain.heightmapMaximumLOD = 0;
					Terrain.activeTerrain.basemapDistance = 800f;
					break;
				case 4:
					Terrain.activeTerrain.treeDistance = 1000f;
					Terrain.activeTerrain.treeBillboardDistance = 150f;
					Terrain.activeTerrain.treeCrossFadeLength = 50f;
					Terrain.activeTerrain.treeMaximumFullLODCount = 50;
					Terrain.activeTerrain.detailObjectDistance = 120f;
					Terrain.activeTerrain.detailObjectDensity = 1f;
					Terrain.activeTerrain.heightmapPixelError = 5f;
					Terrain.activeTerrain.heightmapMaximumLOD = 0;
					Terrain.activeTerrain.basemapDistance = 1000f;
					break;
				case 5:
					Terrain.activeTerrain.treeDistance = 2000f;
					Terrain.activeTerrain.treeBillboardDistance = 200f;
					Terrain.activeTerrain.treeCrossFadeLength = 50f;
					Terrain.activeTerrain.treeMaximumFullLODCount = 100;
					Terrain.activeTerrain.detailObjectDistance = 150f;
					Terrain.activeTerrain.detailObjectDensity = 1f;
					Terrain.activeTerrain.heightmapPixelError = 5f;
					Terrain.activeTerrain.heightmapMaximumLOD = 0;
					Terrain.activeTerrain.basemapDistance = 1000f;
					break;
				}
			}
		}

		private bool IncreaseQuality()
		{
			if (m_currentQuality < m_maxQuality)
			{
				m_currentQuality++;
				UpdateQuality();
			}
			return true;
		}

		private bool DecreaseQuality()
		{
			if (m_currentQuality > 0)
			{
				m_currentQuality--;
				UpdateQuality();
			}
			return true;
		}
	}
}