using System;
using System.Collections.Generic;
using o0.Geometry2D;
using o0.Geometry2D.Float;
using UnityEngine;

namespace ZIM
{
    // 屏幕识别使用，记录摄像机画面内的四边形
    public class QuadrilateralInCamera
    {
        public Vector2 CameraSize;
        public OrdinalQuadrilateral2 Quad;


        public QuadrilateralInCamera(Vector2 a, Vector2 b, Vector2 c, Vector2 d, Vector2 cameraSize)
        {
            CameraSize = cameraSize;
            Quad = new OrdinalQuadrilateral2(a.o0Vector(), b.o0Vector(), c.o0Vector(), d.o0Vector());
        }

        public QuadrilateralInCamera(Vector a, Vector b, Vector c, Vector d, Vector cameraSize)
        {
            CameraSize = cameraSize.UnityVector();
            Quad = new OrdinalQuadrilateral2(a, b, c, d);
        }

        public QuadrilateralInCamera(IEnumerable<Vector> enumable, Vector2 cameraSize)
        {
            CameraSize = cameraSize;
            Quad = new OrdinalQuadrilateral2(enumable);
        }

        public QuadrilateralInCamera(OrdinalQuadrilateral2 quad, Vector2 cameraSize)
        {
            CameraSize = cameraSize;
            Quad = quad;
        }

        // 四边形是否完整的在屏幕内
        public bool IsQuadComplete()
        {
            if (Quad.A.x < Quad.B.x && Quad.A.y < Quad.C.y && Quad.B.y < Quad.D.y && Quad.C.x < Quad.D.x && Quad.A.x > 0 && Quad.A.y > 0 &&
                Quad.B.x < CameraSize.x && Quad.B.y > 0 && Quad.C.x > 0 && Quad.C.y < CameraSize.y && Quad.D.x < CameraSize.x && Quad.D.y < CameraSize.y)
                return true;
            return false;
        }

        public List<Vector2> GetVertexList()
        {
            return new List<Vector2>() {
                new Vector2(Quad[0].x / CameraSize.x, Quad[0].y / CameraSize.y),
                new Vector2(Quad[1].x / CameraSize.x, Quad[1].y / CameraSize.y),
                new Vector2(Quad[2].x / CameraSize.x, Quad[2].y / CameraSize.y),
                new Vector2(Quad[3].x / CameraSize.x, Quad[3].y / CameraSize.y)
            };
        }
    }
}