using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace WildAttack
{
    /// <summary>
    /// 动物类
    /// </summary>
    public class Animal : MonoBehaviour
    {
        #region Members
        private Animator anim;
        /// <summary>
        /// 移动范围
        /// </summary>
        [SerializeField] private float targetRange;
        private Vector3 oriPos;
        private Vector3 randomPoint;

        [SerializeField] private float idlerestSpawnTime = 0;
        #endregion

        #region Lifecycle
        // Start is called before the first frame update
        void Start()
        {
            anim = GetComponent<Animator>();
            oriPos = transform.localPosition;
            idlerestSpawnTime = Random.Range(3f, 15f);
            GetNewRandomTarget();
        }

        // Update is called once per frame
        void Update()
        {
            // 判断死亡动画状态
            if (anim.GetCurrentAnimatorStateInfo(0).IsName("Dead") && anim.GetCurrentAnimatorStateInfo(0).normalizedTime > 0.9f)
            {
                Destroy(gameObject);
            }
            // 随机idle run

            float runWeight = Random.Range(0f, 1f);
            anim.SetFloat("run", runWeight);

            if (Vector3.Distance(transform.position, randomPoint) < 1f)
            {
                GetNewRandomTarget();
            }
            else
            {
                // 判断状态
                transform.LookAt(new Vector3(randomPoint.x, transform.position.y, randomPoint.z));
                if (anim.GetCurrentAnimatorStateInfo(0).IsName("Run") && idlerestSpawnTime > 0)
                {
                    transform.Translate(Vector3.forward * 5 * Time.deltaTime);
                }
            }

            // idlerest动作3~15秒随机播放一次
            if (idlerestSpawnTime <= 0)
            {
                anim.SetTrigger("idlerest");
                idlerestSpawnTime = Random.Range(3f, 15f);
            }
            else
            {
                idlerestSpawnTime -= Time.deltaTime;
            }
        }
        #endregion

        #region Functions
        public void Dead()
        {
            anim.SetTrigger("dead");
        }

        /// <summary>
        /// 获取新目标点
        /// </summary>
        void GetNewRandomTarget()
        {
            float randomX = Random.Range(-targetRange, targetRange);
            float randomZ = Random.Range(-targetRange, targetRange);

            //会根据角当前位置的一定范围进行随机移动
            //Vector3 randomPint = new Vector3(transform.position.x + randomX, transform.position.y, transform.position.z + randomZ);
            randomPoint = new Vector3(oriPos.x + randomX, transform.position.y, oriPos.z + randomZ);
        }
        #endregion
    }
}