using System.Collections.Generic;
using AibisDream.Framework;
using UnityEngine;

namespace AibisDream
{
    public class Spawner : MonoBehaviour
    {
        
        [SerializeField] private MobileObjectData[] mobileObjectDatas;
        [SerializeField] private bool flip;

        [SerializeField] private bool isDistanceMode = true;
        [SerializeField] private float existTime;
        [SerializeField] private float existDistance;

        [SerializeField] private bool isFixedInterval = true;
        [SerializeField] private float fixedInterval;
        [SerializeField] private Vector2 intervalRange;

        private RandomSelector<MobileObjectData> _selector;
        private MobileObjectFactory _factory;

        public readonly List<AbsMobileObject> mobileObjects = new();

        private float _curInterval;
        private float _targetInterval;

        public void Awake()
        {
            // 先为Data赋一些公共值
            var newMobileDatas = new List<MobileObjectData>();
            foreach (var temp in mobileObjectDatas)
            {
                var dataItem = temp;
                dataItem.isFlip = flip;
                dataItem.isDistanceMode = isDistanceMode;
                dataItem.existTime = existTime;
                dataItem.existDistance = existDistance;
                
                newMobileDatas.Add(dataItem);
            }
            // 处理随机权重
            _selector = new RandomSelector<MobileObjectData>(newMobileDatas, data => data.weight);
            // 创建工厂
            _factory = new MobileObjectFactory(transform);
            // 间隔归零
            _curInterval = 0;
            _targetInterval = isFixedInterval ? fixedInterval : Random.Range(intervalRange.x, intervalRange.y);
        }
        
        public void Update()
        {
            _curInterval += Time.deltaTime;
            // 按时间间隔生成物体
            if (_curInterval >= _targetInterval)
            {
                Spawn();
                _curInterval = 0;
                _targetInterval = isFixedInterval ? fixedInterval : Random.Range(intervalRange.x, intervalRange.y);
            }
        }

        private void Spawn()
        {
            // 生成物体
            var data = _selector.Select();
            var mobileObj = _factory.CreateMobileObject(data);
            mobileObjects.Add(mobileObj);
            // 销毁时同样记录
            mobileObj.OnDisposed += o => mobileObjects.Remove(o);
        }
    }
}