using UnityEngine;

namespace Obi
{
	[RequireComponent(typeof(Camera))]
	public class LookAroundCamera : MonoBehaviour
	{
		public struct CameraShot
		{
			public Vector3 position;

			public Quaternion rotation;

			public Vector3 up;

			public float fieldOfView;

			public CameraShot(Vector3 position, Quaternion rotation, Vector3 up, float fieldOfView)
			{
				this.position = position;
				this.rotation = rotation;
				this.up = up;
				this.fieldOfView = fieldOfView;
			}
		}

		private Camera cam;

		private CameraShot currentShot;

		public float movementSpeed = 5f;

		public float rotationSpeed = 8f;

		public float translationResponse = 10f;

		public float rotationResponse = 10f;

		public float fovResponse = 10f;

		private void Awake()
		{
			cam = GetComponent<Camera>();
			currentShot = new CameraShot(base.transform.position, base.transform.rotation, base.transform.up, cam.fieldOfView);
		}

		private void LookAt(Vector3 position, Vector3 up)
		{
			currentShot.up = up;
			currentShot.rotation = Quaternion.LookRotation(position - currentShot.position, currentShot.up);
		}

		private void UpdateShot()
		{
			base.transform.position = Vector3.Lerp(base.transform.position, currentShot.position, translationResponse * Time.deltaTime);
			base.transform.rotation = Quaternion.Slerp(base.transform.rotation, currentShot.rotation, rotationResponse * Time.deltaTime);
			cam.fieldOfView = Mathf.Lerp(cam.fieldOfView, currentShot.fieldOfView, fovResponse * Time.deltaTime);
		}

		private void LateUpdate()
		{
			Vector3 zero = Vector3.zero;
			if (Input.GetKey(KeyCode.W))
			{
				zero += cam.transform.forward;
			}
			if (Input.GetKey(KeyCode.A))
			{
				zero -= cam.transform.right;
			}
			if (Input.GetKey(KeyCode.S))
			{
				zero -= cam.transform.forward;
			}
			if (Input.GetKey(KeyCode.D))
			{
				zero += cam.transform.right;
			}
			currentShot.position += zero * Time.deltaTime * movementSpeed;
			if (Input.GetKey(KeyCode.Mouse0))
			{
				float angle = Input.GetAxis("Mouse X") * rotationSpeed;
				float angle2 = Input.GetAxis("Mouse Y") * rotationSpeed;
				Quaternion quaternion = currentShot.rotation * Quaternion.AngleAxis(angle, Vector3.up) * Quaternion.AngleAxis(angle2, -Vector3.right);
				LookAt(currentShot.position + quaternion * Vector3.forward, Vector3.up);
			}
			UpdateShot();
		}
	}
}