using UnityEngine;

namespace DebuggingEssentials
{
	[DefaultExecutionOrder(99000000)]
	public class NavigationCamera : MonoBehaviour
	{
		public static NavigationCamera instance;

		public static float fov;

		public static bool followTarget;

		public static Camera cam;

		public SO_NavigationCamera data;

		private Transform t;

		private GameObject go;

		private Vector3 currentSpeed;

		private Vector3 position;

		private Vector3 startPosition;

		private Vector3 navPosition;

		private Vector3 followPosition;

		private Quaternion rotation;

		private Quaternion startRotation;

		private Quaternion navRotation;

		private Quaternion followRotation;

		private Vector2 deltaMouse;

		private Vector2 mousePosOld;

		private float tStamp;

		private float deltaTime;

		private float oldFov;

		private float scrollWheel;

		private GameObject selectionIndicatorGO;

		private Transform selectionIndicatorT;

		public static void ResetStatic()
		{
			followTarget = false;
		}

		private void Awake()
		{
			instance = this;
			go = base.gameObject;
			t = base.transform;
			cam = GetComponent<Camera>();
			tStamp = Time.realtimeSinceStartup;
			startPosition = (navPosition = t.position);
			startRotation = (navRotation = t.rotation);
			navRotation = ResetRotZ(navRotation, roundTo180: false);
			fov = (oldFov = cam.fieldOfView);
			selectionIndicatorGO = RuntimeInspector.selectionIndicatorGO;
			selectionIndicatorT = selectionIndicatorGO.transform;
			if (followTarget)
			{
				ResetFollowPosRot();
			}
		}

		private void OnDestroy()
		{
			if (instance == this)
			{
				instance = null;
			}
			RestoreCam();
		}

		private void Update()
		{
			if (RuntimeInspector.instance == null)
			{
				Object.Destroy(this);
				return;
			}
			if (EventInput.isKeyDownFollowCamera)
			{
				followTarget = !followTarget;
				if (followTarget)
				{
					ResetFollowPosRot();
				}
			}
			if (WindowManager.eventHandling.hasEntered)
			{
				scrollWheel = 0f;
			}
			else
			{
				scrollWheel = (0f - EventInput.mouseScrollDelta) * data.mouseScrollWheelMulti.value;
			}
		}

		private Quaternion ResetRotZ(Quaternion rot, bool roundTo180 = true)
		{
			Vector3 eulerAngles = rot.eulerAngles;
			if (roundTo180)
			{
				eulerAngles.z = Mathf.Round(eulerAngles.z / 180f) * 180f;
			}
			else
			{
				eulerAngles.z = 0f;
			}
			return Quaternion.Euler(eulerAngles);
		}

		private void LateUpdate()
		{
			if (RuntimeInspector.instance == null)
			{
				Object.Destroy(this);
				return;
			}
			deltaMouse = EventInput.mousePos - mousePosOld;
			mousePosOld = EventInput.mousePos;
			float speedMulti = GetSpeedMulti();
			cam.fieldOfView = fov;
			deltaTime = Time.realtimeSinceStartup - tStamp;
			tStamp = Time.realtimeSinceStartup;
			Vector3 zero = Vector3.zero;
			if (followTarget)
			{
				RuntimeInspector.UpdateSelectedIndicatorTransform();
				FollowTarget();
			}
			if (EventInput.isMouseButtonDown1)
			{
				Quaternion quaternion = t.rotation;
				if (followTarget)
				{
					t.rotation = rotation;
				}
				else
				{
					t.rotation = navRotation;
				}
				t.Rotate(0f, deltaMouse.x * data.mouseSensitity.value * 0.125f, 0f, Space.World);
				t.Rotate(deltaMouse.y * data.mouseSensitity.value * 0.125f, 0f, 0f, Space.Self);
				if (followTarget)
				{
					followRotation = Quaternion.Inverse(ResetRotZ(selectionIndicatorT.rotation, roundTo180: false)) * ResetRotZ(t.rotation);
				}
				else
				{
					navRotation = ResetRotZ(t.rotation);
				}
				t.rotation = quaternion;
				if (EventInput.isKeyW)
				{
					zero.z = 1f;
				}
				else if (EventInput.isKeyS)
				{
					zero.z = -1f;
				}
				if (EventInput.isKeyD)
				{
					zero.x = 1f;
				}
				else if (EventInput.isKeyA)
				{
					zero.x = -1f;
				}
				if (EventInput.isKeyE)
				{
					zero.y = 1f;
				}
				else if (EventInput.isKeyQ)
				{
					zero.y = -1f;
				}
				zero *= speedMulti;
			}
			if (EventInput.isMouseButtonDown2)
			{
				zero.x = (0f - deltaMouse.x / deltaTime) / 60f;
				zero.y = deltaMouse.y / deltaTime / 60f;
				zero *= speedMulti * data.mouseStrafeMulti.value * 0.1f;
				currentSpeed = zero;
			}
			else
			{
				Lerp2Way(ref currentSpeed, zero, data.accelMulti.value, data.decelMulti.value);
			}
			if (RuntimeInspector.selectionIndicatorGO.activeInHierarchy && EventInput.isFocusCameraKey && !EventInput.isAlignWithViewKey && !EventInput.isMoveToViewKey)
			{
				ResetFollowPosRot();
				FollowTarget();
			}
			if (!followTarget)
			{
				t.rotation = (rotation = navRotation);
				navPosition += t.TransformDirection(currentSpeed * deltaTime) + t.forward * scrollWheel * GetSpeedMultiScrollWheel() * deltaTime;
				t.position = (position = navPosition);
			}
			if (RuntimeInspector.selectedGO != null && EventInput.isFocusCameraKey)
			{
				if (EventInput.isAlignWithViewKey)
				{
					RuntimeInspector.selectedGO.transform.position = t.position;
					RuntimeInspector.selectedGO.transform.forward = t.forward;
				}
				else if (EventInput.isMoveToViewKey)
				{
					RuntimeInspector.selectedGO.transform.position = t.position + t.forward * 2f;
				}
			}
		}

		private void FollowTarget()
		{
			if (RuntimeInspector.selectedGO == go || RuntimeInspector.selectedGO == RuntimeInspector.selectionIndicatorGO)
			{
				followTarget = false;
				return;
			}
			t.rotation = (rotation = (navRotation = ResetRotZ(selectionIndicatorT.rotation, roundTo180: false) * followRotation));
			followPosition += selectionIndicatorT.InverseTransformDirection(t.TransformDirection(currentSpeed * deltaTime) + t.forward * scrollWheel * deltaTime);
			t.position = (position = (navPosition = selectionIndicatorT.position + selectionIndicatorT.rotation * followPosition));
		}

		public void ResetFollowPosRot()
		{
			Transform transform = RuntimeInspector.selectionIndicatorGO.transform;
			t.rotation = transform.rotation;
			t.position = transform.position;
			followPosition = new Vector3(0f, 0f, -2f);
			followRotation = Quaternion.identity;
		}

		public void SetCam()
		{
			t.rotation = rotation;
			t.position = position;
		}

		public void RestoreCam()
		{
			t.position = startPosition;
			t.rotation = startRotation;
			cam.fieldOfView = oldFov;
		}

		private float GetSpeedMulti()
		{
			if (EventInput.isShiftKey)
			{
				return data.speedFast.value;
			}
			if (EventInput.isControlKey)
			{
				return data.speedSlow.value;
			}
			return data.speedNormal.value;
		}

		private float GetSpeedMultiScrollWheel()
		{
			if (EventInput.isShiftKey)
			{
				return 2f;
			}
			if (EventInput.isControlKey)
			{
				return 0.5f;
			}
			return 1f;
		}

		private void Lerp2Way(ref Vector3 v, Vector3 targetV, float upMulti, float downMulti)
		{
			Lerp2Way(ref v.x, targetV.x, upMulti, downMulti);
			Lerp2Way(ref v.y, targetV.y, upMulti, downMulti);
			Lerp2Way(ref v.z, targetV.z, upMulti, downMulti);
		}

		private void Lerp2Way(ref float v, float targetV, float upMulti, float downMulti)
		{
			v = Mathf.Lerp(t: ((!(Mathf.Abs(v) < Mathf.Abs(targetV))) ? downMulti : upMulti) * deltaTime, a: v, b: targetV);
		}
	}
}