using System;
using RootMotion.FinalIK;
using UnityEngine;

[Serializable]
public class ElbowKneeIKData : LimbIKData
{
	public ElbowKneeIKData(FBIKChain chain, IKMappingLimb ik_mapping, FullBodyIKCtrl ik_ctrl, Transform tgt_bone) : base(ik_ctrl, chain, ik_mapping, tgt_bone, false)
	{
		this.Chain.bendConstraint.bendGoal = base.IKTarget;
		this.PositionWeight = 0f;
		this.m_IsUpperBody = (this.TargetBone == this.MyIKCtrl.GetIKBone(FullBodyIKCtrl.IKBoneType.Forearm_L) || this.TargetBone == this.MyIKCtrl.GetIKBone(FullBodyIKCtrl.IKBoneType.Forearm_R));
		this.m_ForceIKEnable = true;
		this.m_FABRIK = ik_ctrl.IKTgtRoot.gameObject.AddComponent<FABRIK>();
		this.m_FABRIK.solver.SetChain(new Transform[]
		{
			base.ChainBones[0],
			base.ChainBones[1]
		}, base.ChainBones[0]);
		this.m_FABRIK.solver.target = base.IKTarget;
		this.m_FABRIK.enabled = false;
	}

	public override float PositionWeight
	{
		get
		{
			return this.Chain.bendConstraint.weight;
		}
		set
		{
			this.Chain.bendConstraint.weight = value;
		}
	}

	public override float RotationWeight { get; set; }

	public ShoulderThighIKData ShoulderThighData
	{
		get
		{
			return this.m_ShoulderThighData;
		}
	}

	public HandFootIKData HandFootData
	{
		get
		{
			return this.m_HandFootData;
		}
	}

	public override void ApplyIKSetting()
	{
		this.m_TargetBoneLocalRot = this.TargetBone.localRotation;
		this.m_HandFootLocalRot = this.HandFootData.TargetBone.localRotation;
		base.ApplyIKSetting();
	}

	protected override void SetTargetTransform(IKCtrlData.IKSettingData data, Vector3 pos, Quaternion rot)
	{
		base.SetTargetTransform(data, pos, rot);
		Transform iktarget = this.m_ShoulderThighData.IKTarget;
		if (data.IsPointAttach)
		{
			iktarget.rotation = Quaternion.FromToRotation(this.TargetBone.position - iktarget.position, base.IKTarget.position - iktarget.position) * iktarget.rotation;
		}
		else
		{
			Vector3 axis = base.IKTarget.position - iktarget.position;
			Quaternion rotation = base.IKTarget.rotation;
			Vector3 lhs = rotation * Vector3.forward;
			Vector3 rhs = this.TargetBone.rotation * Vector3.forward;
			float f = Vector3.Dot(lhs, rhs);
			float num = Mathf.Acos(f) * 57.29578f;
			if (float.IsNaN(num))
			{
				num = 0f;
			}
			iktarget.rotation = Quaternion.AngleAxis(num, axis) * iktarget.rotation;
		}
	}

	public void SetChainData(HandFootIKData handfoot_data, ShoulderThighIKData shoulderthigh_data)
	{
		this.m_HandFootData = handfoot_data;
		this.m_ShoulderThighData = shoulderthigh_data;
	}

	public override void Update()
	{
		if (this.HandFootData.IsIKExecTruth)
		{
			return;
		}
		if (base.RotateIK.IsIKExec)
		{
			this.ShoulderThighData.TargetBone.rotation = Quaternion.Slerp(this.ShoulderThighData.TargetBone.rotation, this.ShoulderThighData.IKTarget.rotation, this.RotationWeight);
			this.TargetBone.localRotation = this.m_TargetBoneLocalRot;
			this.HandFootData.TargetBone.localRotation = this.m_HandFootLocalRot;
		}
		Quaternion rotation = this.TargetBone.rotation;
		if (base.PointIK.IsIKExec)
		{
			this.m_FABRIK.solver.IKPositionWeight = this.PositionWeight;
			this.m_FABRIK.solver.Update();
			this.TargetBone.rotation = rotation;
		}
	}

	private ShoulderThighIKData m_ShoulderThighData;

	private HandFootIKData m_HandFootData;

	private FABRIK m_FABRIK;

	private Quaternion m_HandFootLocalRot = Quaternion.identity;

	private Quaternion m_TargetBoneLocalRot = Quaternion.identity;
}