using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

namespace BuildSystem
{
    public class CarController : MonoSingleton<CarController>
    {
        [Header("车辆生成位置")]
        public List<Vector2Int> birth = new List<Vector2Int>();
        [Header("车辆预制体")]
        public Car[] carPrefabs;
        [Header("生成最大车辆数")]
        public int carNumber;
        [NonSerialized]
        public int number = 0;
        [Header("车辆创建时间")]
        public Vector2 createTime;
        [Header("40为标准速度")]
        public Vector2 speed;

        public List<Car> allCar = new List<Car>();
        void Start()
        {
            birth.Add(new Vector2Int(0 , 2));
            birth.Add(new Vector2Int(13, 3));
            //birth.Add(new Vector2Int(13, 4));
        }

        /// <summary>
        /// 开启创建车辆协程
        /// </summary>
        public void StartCreateCar() {
            StartCoroutine(CreateCar());
            StartCoroutine(ReduceCar());
        }
        /// <summary>
        /// 创建车辆
        /// </summary>
        /// <returns></returns>
        IEnumerator CreateCar() {
            while (true) {
                yield return new WaitUntil(() => { return number < carNumber; });
                yield return new WaitForSeconds(UnityEngine.Random.Range(createTime.x, createTime.y));
                number++;
                GameObject car = Instantiate(carPrefabs[UnityEngine.Random.Range(0, carPrefabs.Length)].gameObject,transform);
                car.GetComponent<Car>().OpenMove(birth[UnityEngine.Random.Range(0, birth.Count)], UnityEngine.Random.Range(speed.x,speed.y));
                allCar.Add(car.GetComponent<Car>());
            }
        }

        /// <summary>
        /// 删减车辆协程
        /// </summary>
        /// <returns></returns>
        IEnumerator ReduceCar()
        {
            while (true)
            {
                yield return new WaitUntil(() => { return number > carNumber; });
                yield return new WaitForSeconds(UnityEngine.Random.Range(createTime.x, createTime.y));
                number--;
                int id = UnityEngine.Random.Range(0, allCar.Count - 1);
                Car car = allCar[id];
                allCar.RemoveAt(id);
                Destroy(car.gameObject);
            }
        }

        public void ClearCar(Car car) {
            allCar.Remove(car);
            Destroy(car.gameObject);
            number--;
        }

        public void CarNumberChange(float num) {
            carNumber = (int)(num * 30) + 30;
        }


    }
}