using System;
using System.Collections;
using System.Collections.Generic;
using BITKit;
using Net.BITKit.Quadtree;
using Unity.Mathematics;
using UnityEngine;
using Random = UnityEngine.Random;

namespace Net.Project.B.Quadtree
{
    public class MonoQuadtreeDrawer : MonoBehaviour
    {
        [SerializeField] private int size;
        private BITKit.Quadtree.Quadtree _quadtree;
        
        [BIT]
        private void Init()
        {
            _quadtree = new BITKit.Quadtree.Quadtree(default, new float2(512, 512));

            for (var i = 0; i < 512*8; i++)
            {
                _quadtree.Insert(i,Random.insideUnitCircle * 512,Random.value>0.5f ? Random.insideUnitCircle * 8 :default);
            }

            _quadtree.Query(default, default);
        }
        private void OnDrawGizmos()
        {
            if(_quadtree is null)return;

            var repeatedObject = new HashSet<int>();
           Draw(_quadtree.Root);

           {
               Gizmos.color = Color.red;
               var worldPos = transform.position;
               Gizmos.DrawWireSphere(worldPos, size);
               foreach (var id in _quadtree.Query(new float2(worldPos.x,worldPos.z),size).Span)
               {
                   var pos = _quadtree.Positions[id];
                   Gizmos.DrawSphere(new Vector3(pos.x,0,pos.y),1);
               }
           }
        

            return;

            void Draw(QuadtreeNode quadtreeNode)
            {
                Gizmos.color = Color.white;
                
                if(quadtreeNode.Size.x is 0)return;

                var nodeCenter = quadtreeNode.Center;
                var nodeSize = quadtreeNode.Size;

                foreach (var (id,rectangle) in _quadtree.Sizes)
                {
                    var pos = _quadtree.Positions[id];
                    Gizmos.DrawWireCube(new Vector3(pos.x,0,pos.y),new Vector3(rectangle.x,0,rectangle.y));
                }

                foreach (var id in quadtreeNode.Objects)
                {
                    if (repeatedObject.Add(id) is false)
                    {
                        Debug.Log("重复对象");
                    }
                    var pos = _quadtree.Positions[id];
                    var worldPos = new Vector3(pos.x, 0, pos.y);
                    Gizmos.DrawSphere(worldPos,1);
                }
                
                Gizmos.DrawWireCube(new Vector3(nodeCenter.x,0,nodeCenter.y),new Vector3(nodeSize.x,0,nodeSize.y));

                foreach (var child in quadtreeNode.Children)
                {
                    Draw(child);
                }
            }
        }
    }

}