using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RichCreator.Utility.Structs
{
    /// <summary>
    /// 方框
    /// </summary>
    public struct ZTRectangle:IEquatable<ZTRectangle>
    {
        public static ZTRectangle Empty = new ZTRectangle(0, 0, 0, 0);

        public ZTRectangle(Int32 startX, Int32 startY, Int32 endX, Int32 endY)
        {
            this.Start = new ZTPoint(startX, startY);
            this.End = new ZTPoint(endX, endY);
        }

        /// <summary>
        /// 左上角点
        /// </summary>
        public ZTPoint Start;

        /// <summary>
        /// 右下角点
        /// </summary>
        public ZTPoint End;

        /// <summary>
        /// 得到中心点
        /// </summary>
        /// <returns></returns>
        public ZTPoint GetCenterPoint()
        {
            return GetRatioPoint(0.5f);
        }

        /// <summary>
        /// 得到一个比例的某个点
        /// </summary>
        /// <param name="ratio"></param>
        /// <returns></returns>
        public ZTPoint GetRatioPoint(float ratio)
        {
            return new ZTPoint((Int32)(Start.X + (End.X - Start.X)*ratio), (Int32)(Start.Y + (End.Y - Start.Y) *ratio));
        }

        public Int32 GetWidth()
        {
            return End.X - Start.X;
        }

        public Int32 GetHight()
        {
            return End.Y - Start.Y;
        }

        public static bool operator ==(ZTRectangle a, ZTRectangle b)
        {
            if (a.Start == b.Start && a.End == b.End)
            {
                return true;
            }
            return false;
        }

        public static bool operator !=(ZTRectangle a, ZTRectangle b)
        {
            if (a.Start != b.Start || a.End != b.End)
            {
                return true;
            }
            return false;
        }


        public override string ToString()
        {
            return "start:" + Start.ToString() + ",end:" + End.ToString();
        }

        #region IEquatable
        public bool Equals(ZTRectangle other)
        {
            if (this.Start == other.Start && this.End == other.End)
            {
                return true;
            }
            return false;
        }
        #endregion
    }
}