using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.AI;
/// <summary>
/// 车辆管理类
/// 功能：车辆生成
///      车辆AI
/// 
/// </summary>
public class CarSys : MonoBehaviour
{
    //计时器
    private float timer = 0f;
    //车辆生成间隔
    public float bornTime = 10;
    //车辆种类列表
    public GameObject[] carList;
    

    //移动点列表
    private Dictionary<string, Transform> MoveList = new Dictionary<string, Transform>();
    //生成点列表
    private Dictionary<string, Transform> BornList = new Dictionary<string, Transform>();


    public void Init()
    {
        CheckBornoint();
        CheckMovePoint();
        
    }


    //检索移动点
    public void CheckBornoint()
    {
        GameObject[] bornPoints = GameObject.FindGameObjectsWithTag("BornPoint");
        for (int i = 0; i < bornPoints.Length; i++)
        {
            BornList.Add(bornPoints[i].name, bornPoints[i].transform);

        }
    }

    //检索移动点
    public void CheckMovePoint()
    {
        GameObject[] moveObjs = GameObject.FindGameObjectsWithTag("MoveList");
        for (int i = 0; i < moveObjs.Length; i++)
        {
            MoveList.Add(moveObjs[i].name, moveObjs[i].transform);
            
        }
    }

    //车辆AI移动函数
   public IEnumerator CarMove(string lineName,NavMeshAgent agent)
    {
        if (lineName != "" && agent != null)
        {
            Transform moveListParent = null;
            MoveList.TryGetValue(lineName,out moveListParent);
            if (moveListParent != null)
            {
                Transform[] moveList=new Transform[moveListParent.childCount];
                //遍历移动列表
                for (int i = 0; i < moveListParent.childCount; i++)
                {
                    moveList[i] = moveListParent.GetChild(i);
                    if (moveList[i] != null)
                    {
                        //向移动列表支点移动
                        agent.speed = 20;
                        agent.SetDestination(moveList[i].position);
                        //携程检测距离与路况
                        while (true)
                        {
                            //*********************//
                            yield return new WaitForEndOfFrame();
                            float distance = Vector3.Distance(agent.transform.position, moveList[i].position);
                            if(distance <= 40f)
                            {
                                agent.speed = 10;
                            }
                            if (distance <= 0.4f) {
                                agent.velocity= Vector3.zero;
                                break; 
                            }
                           
                           
                        }
                    }

                }

                //回收车辆
                Destroy(agent.gameObject);
            }

        }


    }

    //汽车生成函数
    public void CreatCar(float time)
    {
        //计时
        timer += Time.deltaTime;
        if (timer < time)
        {
            return;
        }
        else
        {
            timer = 0;
        }
        //随机获取出生点
        Transform parent = null;
        int pointIndex= Random.Range(1, BornList.Count);
        BornList.TryGetValue("0" + pointIndex.ToString(),out parent);
        //随机创建车辆种类
        if (parent != null)
        {
            int carIndex = Random.Range(0, carList.Length-1);
            GameObject car = GameObject.Instantiate(carList[carIndex],parent.position,Quaternion.identity,parent);
            car.transform.localEulerAngles = parent.localEulerAngles;
            //执行寻路AI
            NavMeshAgent agent = car.GetComponent<NavMeshAgent>();
            if (agent != null)
            {
                StartCoroutine(CarMove(parent.name,agent));
            }
        }
    }
}