using RootMotion.FinalIK;
using UnityEngine;

[RequireComponent(typeof(CCDIK))]
public class RodIK : MonoBehaviour
{
	[SerializeField]
	private CCDIK ik;

	[SerializeField]
	private Transform tipBone;

	[Header("Creation")]
	[Tooltip("Use this variable to assign IK automation from button")]
	[SerializeField]
	private Transform boneIKRoot;

	public float action = 5f;

	public float minBendWeight = 0.01f;

	public float maxBendWeight = 1f;

	private Transform bendTarget;

	private float tension;

	private float currentWeight;

	private float tensionMomentum;

	private void Start()
	{
		ik.fixTransforms = false;
		ik.solver.SetIKPositionWeight(0.001f);
		ik.solver.FixTransforms();
		ik.solver.Update();
		float num = 0f;
		float num2 = 1f / (float)ik.solver.bones.Length / 2f;
		ik.solver.tolerance = 0f;
		ik.solver.maxIterations = 1;
		IKSolver.Bone[] bones = ik.solver.bones;
		for (int i = 0; i < bones.Length; i++)
		{
			bones[i].weight = 0.1f;
			num += num2;
		}
	}

	public void SetIkWeight(float value)
	{
		tension = value;
	}

	private void Update()
	{
		tensionMomentum = Mathf.Lerp(tensionMomentum, tension, Time.deltaTime * 15f * action);
		float iKPositionWeight = Mathf.Lerp(minBendWeight, maxBendWeight, tensionMomentum);
		ik.solver.SetIKPositionWeight(iKPositionWeight);
		if (bendTarget != null)
		{
			Vector3.Lerp(tipBone.position, bendTarget.position, tension);
			ik.solver.SetIKPosition(bendTarget.position);
		}
		ik.solver.FixTransforms();
		ik.solver.Update();
	}

	public void SetIKTarget(Transform target)
	{
		bendTarget = target;
	}

	private void SetRodIKBones()
	{
		ik = GetComponent<CCDIK>();
		Transform[] componentsInChildren = boneIKRoot.GetComponentsInChildren<Transform>();
		foreach (Transform bone in componentsInChildren)
		{
			ik.solver.AddBone(bone);
		}
	}
}