using StgSharp.Control;
using StgSharp.Math;
using System;
using System.Collections.Generic;
using System.Text;

namespace StgSharp.Geometries
{
    internal class Parallelogram : IGeometry
    {
        internal Point _basePoint;
        internal Point _center;
        internal Point _corner1;
        internal Point _corner2;
        internal RenderMode _renderMode;
        internal readonly uint bornTick;

        public override sealed Point BasePoint => _basePoint;
        public override sealed Point RefPoint => _center;

        public override sealed Point RefVec01 => _corner1;

        public override sealed Point RefVec02 => _corner2;

        public override RenderMode renderMode => _renderMode;

        public Parallelogram(uint bornTime) : base(bornTime)
        {
            bornTick = bornTime;
        }

        public Parallelogram(Counter<uint> tickCounter) : base(tickCounter)
        {
            bornTick = tickCounter._value;
        }

        internal override sealed void OnRender(uint tick)
        {
            tick -= bornTick;
            CalcVec01(tick);
            switch (renderMode)
            {
                case RenderMode.BasePoint:
                    CalcVec02(_basePoint._position, tick);
                    CalcVec03(_basePoint._position, tick);
                    break;
                case RenderMode.RefPoint:
                    CalcVec02(_center._position, tick);
                    CalcVec03(_center._position, tick);
                    break;
                default:
                    break;
            }
        }

        public override sealed float SetArrayX()
        {
            throw new NotImplementedException();
        }

        public override sealed float SetArrayY()
        {
            throw new NotImplementedException();
        }

        //计算参考中心点的位移
        internal override void CalcVec01(uint tick)
        {
            _center._position = _basePoint._position + MovCenter(tick);
        }

        //计算第一个顶点的位移，存在相对中心位移和相对参考原点位移两种模式
        internal override void CalcVec02(vec3d vec, uint tick)
        {
            _corner1._position = vec + UpdateCTC1(tick);
        }

        //计算第二个顶点的位移，存在相对中心位移和相对参考原点位移两种模式
        internal override void CalcVec03(vec3d vec, uint tick)
        {
            _corner2._position = vec + UpdateCTC2(tick);
        }

        public virtual vec3d MovCenter(uint tick) => default(vec3d);

        public virtual vec3d UpdateCTC1(uint tick) => default(vec3d);

        public virtual vec3d UpdateCTC2(uint tick) => default(vec3d);

        public override Line[] GetAllSides()
        {

            Line[] lines = new Line[4]
                {   
                    new Line(GameTimeLine.tickCounter),
                    new Line(GameTimeLine.tickCounter),
                    new Line(GameTimeLine.tickCounter),
                    new Line(GameTimeLine.tickCounter),
                };


            lines[0]._basePoint = this._corner1;
            lines[0]._beginPoint = this._corner1;
            lines[0]._endPoint = this._corner2;

            lines[1]._basePoint = this._corner2;
            lines[1]._beginPoint = this._corner2;
            lines[1]._endPoint = new Point() { _position = getCorner3(GameTimeLine.tickCounter)};
            lines[1].movEnd += this.getCorner3;

            lines[2]._basePoint = lines[1]._endPoint;
            lines[2]._beginPoint = lines[2]._basePoint;
            lines[2]._endPoint = new Point() { _position = this.getCorner4(GameTimeLine.tickCounter) };
            lines[2].movEnd+= this.getCorner4;

            lines[3]._beginPoint = lines[2]._endPoint;
            lines[3]._endPoint = this._corner1;

            return lines;
        }

        protected vec3d getCorner1(Counter<uint> tick)
        {
            return this._corner1._position;
        }
        protected vec3d getCorner2(Counter<uint> tick)
        {
            return this._corner2._position;
        }
        protected vec3d getCorner3(Counter<uint> tick)
        {
            return 2 * this._center._position - this._corner1._position;
        }

        protected vec3d getCorner4(Counter<uint> tick)
        {
            return 2 * this._center._position - this._corner2._position;
        }
    }
}