using System;
using System.Linq;
using AibisDream.FixSystem;
using AibisDream.Framework;
using AibisDream.Kit;
using Framework.Core;
using UnityEngine;

namespace AibisDream
{
    public class GearSystem : SystemHasData
    {
        #region 索引

        [SerializeField] private GameObject gearPrefab;
        [SerializeField] private GameObject shaftPrefab;
        private Shaft[] _shafts;

        #endregion

        private ShaftGraph _shaftGraph;

        private void Awake()
        {
            Init();
        }

        #region 生命周期管理

        public void Init()
        {
            FixSystemCenter.SystemDic.Register(this);
            this.FindComponents();
            _shafts = GetComponentsInChildren<Shaft>();
        }

        public void Start()
        {
            _shaftGraph = new ShaftGraph(_shafts);
        }

        #endregion

        /// <summary>
        /// 判断吸附位置
        /// </summary>
        /// <param name="pos">齿轮当前位置</param>
        /// <param name="gearRadius">齿轮半径</param>
        /// <returns>能够被吸附的轴</returns>
        public Shaft CheckClosestShaft(Vector3 pos, float gearRadius)
        {
            return _shaftGraph.QuerySnapShaft(pos, gearRadius);
        }

        /// <summary>
        /// 判断齿轮能不能放进轴内
        /// </summary>
        /// <param name="sourceShaft">当前轴</param>
        /// <param name="gearRadius">齿轮半径</param>
        /// <returns>是否可用</returns>
        public bool CheckGearSuitable(Shaft sourceShaft, float gearRadius)
        {
            return _shaftGraph.CheckGearSuitable(sourceShaft, gearRadius);
        }

        /// <summary>
        /// 生成齿轮
        /// </summary>
        /// <param name="pos">位置</param>
        /// <param name="radius">半径</param>
        /// <param name="sprite">齿轮图片</param>
        /// <param name="speed">速度</param>
        /// <returns>齿轮Obj</returns>
        public GameObject InitGear(Vector3 pos, float radius, Sprite sprite)
        {
            GameObject gearObj = Instantiate(gearPrefab, pos, Quaternion.identity);
            gearObj.transform.parent = transform.Find("Gears").transform;
            Gear gear = gearObj.GetComponent<Gear>();
            gear.radius = radius;
            gear.gearSprite = sprite;
            return gearObj;
        }

        /// <summary>
        /// 某个轴上齿轮发生变化时更新临接关系
        /// </summary>
        /// <param name="shaftId">轴ID</param>
        public void ChangeGraphVertex(int shaftId)
        {
            _shaftGraph?.ChangeVertex(shaftId);
        }

        public void Succeed()
        {
            Debug.Log("达成目标");
        }

        #region 数据保存与加载

        public static string DataPath = Application.streamingAssetsPath + "/LevelData/GearSystem/";
        private string[] _keyOptions;
        public override string CurDataKey { get; set; }

        public override string[] GetDataKeyOptions()
        {
            return _keyOptions ??= ConfigUtil.Instance.GetFileNames(DataPath);
        }

        public override void Load()
        {
            if (string.IsNullOrEmpty(CurDataKey))
            {
                Debug.Log("配置项名称为空");
                return;
            }

            if (!ConfigUtil.Instance.TryLoadConfig<GearSystemData>(DataPath + CurDataKey, out var data))
            {
                Debug.Log("没有找到配置项");
                return;
            }

#if UNITY_EDITOR
            // 现将当前配置保存为temp避免丢失
            if (CurDataKey != "temp.json")
            {
                SaveByKey("temp.json");
            }
#endif

            LoadByData(data);
        }

        private void LoadByData(GearSystemData gearSystemData)
        {
            // 先清除
            var shaftRoot = transform.Find("Shafts");
            var shaftsObj = shaftRoot.GetComponentsInChildren<Shaft>();
            foreach (var oldShaft in shaftsObj)
            {
#if UNITY_EDITOR
                DestroyImmediate(oldShaft.gameObject);
#else
                Destory(oldShaft.gameObject);
#endif
            }

            // 再添加
            foreach (var shaftData in gearSystemData.shaftLevelDataArray)
            {
                var newShaft = Instantiate(shaftPrefab, shaftRoot).GetComponent<Shaft>();
                newShaft.Load(shaftData);
            }
        }

        public override void Save()
        {
            if (string.IsNullOrEmpty(CurDataKey)) return;

            SaveByKey(CurDataKey);
            if (!_keyOptions.Contains(CurDataKey))
            {
                // 重新读取key
                _keyOptions = ConfigUtil.Instance.GetFileNames(DataPath);
            }
        }

        private void SaveByKey(string key)
        {
            var shaftsObj = transform.Find("Shafts").GetComponentsInChildren<Shaft>();
            var shaftDataArray = new ShaftLevelData[shaftsObj.Length];

            for (int i = 0; i < shaftDataArray.Length; i++)
            {
                shaftDataArray[i] = shaftsObj[i].Save();
            }

            var data = new GearSystemData
            {
                shaftLevelDataArray = shaftDataArray
            };

            ConfigUtil.Instance.SaveConfig(data, DataPath + key);
        }

        public void AddShaft()
        {
            var shaftRoot = transform.Find("Shafts");
            Instantiate(shaftPrefab, shaftRoot);
        }

        #endregion
    }

    [Serializable]
    public struct GearSystemData
    {
        public ShaftLevelData[] shaftLevelDataArray;
    }
}