using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Cysharp.Threading.Tasks;
using JNGame.Math;
using JNGame.Sync.Entity;
using JNGame.Sync.Frame.Service;
using JNGame.Sync.State.Tile.Entity;
using UnityEngine;

namespace JNGame.Sync.State.Tile
{
    /// <summary>
    /// 瓦片状态同步 ： 用于开放世界类型的游戏 将 世界分多个Tile 不同的Service管理
    /// </summary>
    public abstract partial class JNSSTileServerService : JNSStateServerService
    {

        /// <summary>
        /// 区块索引组
        /// </summary>
        protected abstract int[][] Tiles { get; }

        /// <summary>
        /// 区块大小
        /// </summary>
        protected abstract int TileSize { get; }

        /// <summary>
        /// 区块ID
        /// 用于管理当前 Service 负责的区块ID
        /// </summary>
        public int TID { get; private set; }

        /// <summary>
        /// 随机数大小(100000000000UL * RandomSize)
        /// </summary>
        public int RandomSize { get; protected set; } = 1;

        /// <summary>
        /// 区块最大最小位置
        /// </summary>
        public LVector2 MinContains{ get; private set; }
        public LVector2 MaxContains{ get; private set; }

        public override void Initialize()
        {
            OnInit();
        }

        protected virtual async Task OnInit()
        {
            try
            {
                //获取权限
                this.TID = await FetchTileId();

                //更新范围
                UpdateContains();
                base.Initialize();
            }
            catch (Exception e)
            {
                Debug.LogError(e.Message);
                throw;
            }
        }
        
        public sealed override JNContexts CreateContexts()
        {
            return CreateTileContexts();
        }

        public sealed override JNRandomSystem CreateRandom()
        {
            //根据区块设置Id 起始值
            var random = base.CreateRandom();
            random.SetIdValue(100000000000UL * (ulong)RandomSize,(100000000000UL * ((ulong)RandomSize + 1) - 1));
            return random;
        }

        protected virtual JNTileContexts CreateTileContexts()
        {
            return new JNTileContexts();
        }
        
        /// <summary>
        /// 更新区块范围
        /// </summary>
        public void UpdateContains()
        {
            MinContains = new LVector2();
            MaxContains = new LVector2();
                
            try
            {
                //更新区块最大最小位置
                (LVector2 max, LVector2 min) = GetTileContains(TID);
                MinContains = min;
                MaxContains = max;
            }
            catch (Exception e)
            {
                // ignored
                return;
            }

        }
        
        public int GetTileIndex(LVector3 pos)
        {
            return JNSSTileTool.GetTileIndex(Tiles, TileSize, pos);
        }

        /// <summary>
        /// 判断位置是否在区块内
        /// </summary>
        /// <param name="pos"></param>
        /// <returns></returns>
        public bool IsContains(LVector3 position)
        {
            return IsContains(position,MaxContains,MinContains);
        }
        public bool IsContains(LVector3 position,LVector3 Max,LVector3 Min)
        {
            // 假设LVector2是一个包含X和Y属性的结构体或类  
            // 检查X坐标是否在范围内  
            if (position.x < Min.x || position.x >= Max.x)  
            {  
                return false; // X坐标不在范围内  
            }  
  
            // 检查Y坐标是否在范围内  
            if (position.z < Min.y || position.z >= Max.y)  
            {  
                return false; // Y坐标不在范围内  
            }  
  
            // 如果X和Y坐标都在范围内，则返回true  
            return true;  
        }

        /// <summary>
        /// 根据TileId 获取最大最小范围
        /// </summary>
        /// <returns></returns>
        public (LVector2 Max,LVector2 Min) GetTileContains(int index)
        {
            return JNSSTileTool.GetTileContains(Tiles,TileSize,index);
        }

        /// <summary>
        /// 获取九宫格Index
        /// </summary>
        /// <returns></returns>
        public List<int> GetTileGridIndex(int index)
        {
            return JNSSTileTool.GetTileGridIndex(Tiles,TileSize,index);
        }
        
        /// <summary>
        /// 获取 TileId 权限 (返回多少 Service 则管理所属Tile)
        /// </summary>
        /// <returns></returns>
        protected abstract UniTask<int> FetchTileId();

        /// <summary>
        /// 获取当前连接的区块
        /// </summary>
        /// <returns></returns>
        public virtual int[] GetLinkTiles()
        {
            return Array.Empty<int>();
        }

    }
}