namespace Net.Project.B.World
{
 using UnityEngine;

using UnityEngine;

public class RagdollConfigurator : MonoBehaviour
{
    void Start()
    {
        foreach (var joint in GetComponentsInChildren<ConfigurableJoint>())
        {
            ConfigureJointAxis(joint);
            ApplyJointLimits(joint);
        }
        Destroy(this);
    }

    /// <summary>
    /// 自动配置 ConfigurableJoint 的 axis 和 secondaryAxis
    /// </summary>
    void ConfigureJointAxis(ConfigurableJoint joint)
    {
        Transform jointTransform = joint.transform;
        HumanBodyBones boneType = GetBoneType(jointTransform);

        if (boneType == HumanBodyBones.LastBone) return;

        Vector3 primaryAxis;
        Vector3 secondaryAxis;

        switch (boneType)
        {
            case HumanBodyBones.Hips:
            case HumanBodyBones.Spine:
                primaryAxis = jointTransform.right;
                secondaryAxis = jointTransform.up;
                break;

            case HumanBodyBones.LeftUpperArm:
            case HumanBodyBones.RightUpperArm:
                primaryAxis = jointTransform.forward; // 手臂通常绕前后旋转
                secondaryAxis = jointTransform.up;
                break;

            case HumanBodyBones.LeftLowerArm:
            case HumanBodyBones.RightLowerArm:
                primaryAxis = jointTransform.forward;
                secondaryAxis = jointTransform.right;
                break;

            case HumanBodyBones.LeftUpperLeg:
            case HumanBodyBones.RightUpperLeg:
                primaryAxis = jointTransform.right;
                secondaryAxis = jointTransform.up;
                break;

            case HumanBodyBones.LeftLowerLeg:
            case HumanBodyBones.RightLowerLeg:
                primaryAxis = jointTransform.right;
                secondaryAxis = jointTransform.forward;
                break;

            default:
                primaryAxis = jointTransform.right;
                secondaryAxis = jointTransform.up;
                break;
        }

        joint.axis = primaryAxis;
        joint.secondaryAxis = secondaryAxis;

        //Debug.Log($"{boneType} -> Axis: {primaryAxis}, SecondaryAxis: {secondaryAxis}");
    }

    /// <summary>
    /// 自动配置关节角度限制
    /// </summary>
    void ApplyJointLimits(ConfigurableJoint joint)
    {
        Transform jointTransform = joint.transform;
        HumanBodyBones boneType = GetBoneType(jointTransform);

        if (boneType == HumanBodyBones.LastBone) return;

        int muscleIndex = HumanTrait.MuscleFromBone((int)boneType, 0);
        if (muscleIndex < 0) return;

        // 获取默认角度范围，并限制在合理范围内
        float minLimit = Mathf.Clamp(HumanTrait.GetMuscleDefaultMin(muscleIndex), -60f, 60f);
        float maxLimit = Mathf.Clamp(HumanTrait.GetMuscleDefaultMax(muscleIndex), -60f, 60f);
        float limitRange = Mathf.Abs(maxLimit - minLimit) * 0.5f;

        // 配置关节限制
        SoftJointLimit limit = new SoftJointLimit { limit = limitRange };
        SoftJointLimitSpring spring = new SoftJointLimitSpring { spring = 50f, damper = 10f };

        joint.lowAngularXLimit = limit;
        joint.highAngularXLimit = limit;
        joint.angularYLimit = limit;
        joint.angularZLimit = limit;
        joint.angularXLimitSpring = spring;
        joint.angularYZLimitSpring = spring;

        joint.angularXMotion = ConfigurableJointMotion.Limited;
        joint.angularYMotion = ConfigurableJointMotion.Limited;
        joint.angularZMotion = ConfigurableJointMotion.Limited;

        // 额外优化
        joint.targetRotation = Quaternion.identity;
        joint.configuredInWorldSpace = false;
        joint.enablePreprocessing = false;

        // 设置刚体质量
        Rigidbody rb = joint.GetComponent<Rigidbody>();
        if (rb != null)
        {
            rb.mass = boneType == HumanBodyBones.Hips ? 8f : 2f;
        }

        //Debug.Log($"{boneType} 关节设置完毕: 限制角度 {limitRange}");
    }

    /// <summary>
    /// 通过 Transform 获取 Humanoid 骨骼类型
    /// </summary>
    HumanBodyBones GetBoneType(Transform jointTransform)
    {
        Animator animator = GetComponent<Animator>();
        if (animator == null || !animator.isHuman) return HumanBodyBones.LastBone;

        foreach (HumanBodyBones bone in System.Enum.GetValues(typeof(HumanBodyBones)))
        {
            if (bone == HumanBodyBones.LastBone) continue;

            if (animator.GetBoneTransform(bone) == jointTransform)
            {
                return bone;
            }
        }

        return HumanBodyBones.LastBone;
    }
}



}