using mh;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting.Antlr3.Runtime.Tree;
using UnityEngine;

public partial class PhysicsManager : Singleton<PhysicsManager>
{
    private List<IQuadTreeObject> m_SharedCollideResults = new List<IQuadTreeObject>();

    public Vector4 GetCircleBound(Vector3 circle)
    {
        float size = circle.z * 2;
        return new Vector4(circle.x, circle.y, size, size);
    }

    public Vector4 GetBoxBound(Vector4 box)
    {
        return box;
    }

    public Vector4 GetRayBound(Vector4 line, float maxLen=20f)
    {
        Vector2 tr = line.xy() + maxLen * line.zw().normalized;
        Vector4 bound = new Vector4();
        bound.x = (tr.x + line.x) / 2;
        bound.y = (tr.y + line.y) / 2;
        bound.z = Mathf.Abs(tr.x - line.x);
        bound.w = Mathf.Abs(tr.y - line.y);
        return bound;
    }

    public Vector4 GetPointBound(Vector2 point)
    {
        Vector4 bound = new Vector4();
        bound.x = point.x;
        bound.y = point.y;
        bound.z = 1;
        bound.w = 1;
        return bound;
    }

    public ref readonly List<IQuadTreeObject> CircleCast(ColliderType target, Vector3 circle)
    {
        m_SharedCollideResults.Clear();
        var retriver = GetRetriverByType(target);
        if(retriver != null)
        {
            if (retriver(GetCircleBound(circle)))
            {
                for(int i = 0; i < m_SharedRetriveResults.Count; ++i)
                {
                    var collider = m_SharedRetriveResults[i];
                    if(collider != null)
                    {
                        if(collider is FastCircleCollider)
                        {
                            if(CircleVsCircle((collider as FastCircleCollider).circle, circle))
                            {
                                m_SharedCollideResults.Add(collider);
                            }
                        }
                        else if(collider is FastBoxCollider)
                        {
                            if (BoxVsCircle((collider as FastBoxCollider).box, circle))
                            {
                                m_SharedCollideResults.Add(collider);
                            }
                        }
                    }
                }
            }
        }
        return ref m_SharedCollideResults;
    }

    public ref readonly List<IQuadTreeObject> BoxCast(ColliderType target, Vector4 box)
    {
        m_SharedCollideResults.Clear();
        var retriver = GetRetriverByType(target);
        if (retriver != null)
        {
            if (retriver(GetBoxBound(box)))
            {
                for (int i = 0; i < m_SharedRetriveResults.Count; ++i)
                {
                    var collider = m_SharedRetriveResults[i];
                    if (collider != null)
                    {
                        if (collider is FastCircleCollider)
                        {
                            if (BoxVsCircle(box, (collider as FastCircleCollider).circle))
                            {
                                m_SharedCollideResults.Add(collider);
                            }
                        }
                        else if (collider is FastBoxCollider)
                        {
                            if (BoxVsBox(box, (collider as FastBoxCollider).box))
                            {
                                m_SharedCollideResults.Add(collider);
                            }
                        }
                    }
                }
            }
        }
        return ref m_SharedCollideResults;
    }

    /// <summary>
    /// x,y dir.x dir.y
    /// </summary>
    /// <param name="target"></param>
    /// <param name="line"></param>
    /// <returns></returns>
    public ref readonly List<IQuadTreeObject> RayCast(ColliderType target, Vector4 ray, float maxLength = 20f)
    {
        return ref m_SharedCollideResults;
    }

    public ref readonly List<IQuadTreeObject> PointCast(ColliderType target, Vector2 point)
    {
        return ref m_SharedCollideResults;
    }

}