using UnityEngine;
using System.Collections;


public class RandomMove : MonoBehaviour
{
    [Header("Movement Settings")]
    [Tooltip("移动速度")]
    public float moveSpeed = 1f;

    [Tooltip("移动范围半径")]
    public float moveRange = 5f;
    

    [Header("Objects to Move")]
    [Tooltip("需要移动的物体数组")]
    public Transform[] moveObjects;

    private Vector3[] initialPositions;
    private Vector3[] targetPositions;

    void Start()
    {
        InitializeRandomRangeMode();
    }

    /// <summary>
    /// 初始化随机范围模式
    /// </summary>
    private void InitializeRandomRangeMode()
    {
        if (moveObjects.Length > 0)
        {
            initialPositions = new Vector3[moveObjects.Length];
            targetPositions = new Vector3[moveObjects.Length];

            for (int i = 0; i < moveObjects.Length; i++)
            {
                if (moveObjects[i] != null)
                {
                    // 记录每个物体的初始位置
                    initialPositions[i] = moveObjects[i].position;

                    // 为每个物体设置一个随机目标位置
                    SetNewRandomTarget(i);
                }
            }
        }
    }

    void Update()
    {
        UpdateRandomRangeMode();
    }

    /// <summary>
    /// 更新随机范围模式下的物体移动
    /// </summary>
    private void UpdateRandomRangeMode()
    {
        if (moveObjects.Length > 0 && initialPositions != null && targetPositions != null)
        {
            for (int i = 0; i < moveObjects.Length; i++)
            {
                if (moveObjects[i] != null)
                {
                    // 向目标位置移动
                    moveObjects[i].position = Vector3.MoveTowards(
                        moveObjects[i].position,
                        targetPositions[i],
                        moveSpeed * Time.deltaTime
                    );

                    // 如果到达目标位置，设置新的目标位置
                    if (Vector3.Distance(moveObjects[i].position, targetPositions[i]) < 0.1f)
                    {
                        SetNewRandomTarget(i);
                    }
                }
            }
        }
    }

    /// <summary>
    /// 为指定索引的物体设置新的随机目标位置
    /// </summary>
    /// <param name="index">物体索引</param>
    private void SetNewRandomTarget(int index)
    {
        targetPositions[index] = initialPositions[index] + new Vector3(
            Random.Range(-moveRange, moveRange),
            Random.Range(-moveRange, moveRange),
            Random.Range(-moveRange, moveRange)
        );
    }

    /// <summary>
    /// 在Scene视图中绘制移动范围的辅助线框
    /// </summary>
    void OnDrawGizmosSelected()
    {
        // 绘制移动范围的线框球体
        if (moveObjects.Length > 0)
        {
            for (int i = 0; i < moveObjects.Length; i++)
            {
                if (moveObjects[i] != null)
                {
                    Gizmos.color = Color.yellow;
                    Vector3 center = Application.isPlaying ?
                        initialPositions[i] : moveObjects[i].position;
                    Gizmos.DrawWireSphere(center, moveRange);
                }
            }
        }
        else
        {
            // 如果没有指定物体，则在脚本所在位置绘制范围
            Gizmos.color = Color.yellow;
            Gizmos.DrawWireSphere(transform.position, moveRange);
        }
    }
}