using PaintDotNet.Annotation.Enum;
using PaintDotNet.Base;
using PaintDotNet.Base.SettingModel;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Globalization;
using System.Runtime.Serialization;
using System.Windows.Forms;

namespace PaintDotNet.Annotation
{
    public abstract class DrawObject
    {
        /// <summary>
        /// 目标被选择状态
        /// </summary>
        private bool selected;
        /// <summary>
        /// 鼠标按下状态, 静态，所有现存的公用
        /// </summary>
        public static bool mouseStatus = false;

        public static int smallRectangleWidth = MarkPointRect.markPointRectWidth;

        public static int MarkpointStyle = MarkPointRect.MarkpointStyle;

        public static int MarkpointLineColor = MarkPointRect.MarkpointLineColor;

        public static int MarkpointLineWidth = MarkPointRect.MarkpointLineWidth;

        public static int MarkpointAreaColor = MarkPointRect.MarkpointAreaColor;

        public static bool isFollow = MarkPointRect.isFollow;

        /// <summary>
        /// 点集合
        /// </summary>
        public List<PointF> pointArrayList;

        /// <summary>
        /// 颜色
        /// </summary>
        private Color color;
        /// <summary>
        /// 线宽
        /// </summary>
        private int penWidth;
        /// <summary>
        /// 用于撤消-重做
        /// </summary>
        int id;
        /// <summary>
        /// 上次使用的属性值
        /// 也许可以不用？？
        /// </summary>
        private static Color lastUsedColor = Color.Black;
        /// <summary>
        /// 上次使用的线宽
        /// 也许可以不用？？
        /// </summary>
        private static int lastUsedPenWidth = 1;
        /// <summary>
        /// 用于序列化-颜色
        /// </summary>
        private const string entryColor = "Color";
        /// <summary>
        /// 用于序列化-线宽
        /// </summary>
        private const string entryPenWidth = "PenWidth";
        /// <summary>
        /// 画板
        /// </summary>
        private ISurfaceBox surfaceBox;
        /// <summary>
        /// 主要用于区分是标注、测量、视场、其它
        /// </summary>
        public DrawClass objectType;
        /// <summary>
        /// 用于标注自身是什么工具
        /// </summary>
        public DrawToolType drawToolType;
        /// <summary>
        /// 外接矩形，或者是计算的矩形
        /// </summary>
        protected RectangleF rectangle;
        /// <summary>
        /// 起始点
        /// </summary>
        public PointF startPoint;
        /// <summary>
        /// 物理长度
        /// </summary>
        public double length = 0;
        /// <summary>
        /// 结束点
        /// </summary>
        public PointF endPoint;
        /// <summary>
        /// 判断辅助线方向的点
        /// </summary>
        public Point judgeP;
        /// <summary>
        /// 文本框内容
        /// </summary>
        public string textboxMessage;
        /// <summary>
        /// 目标点状态 0：添加 1：选择 2：删除
        /// </summary>
        public int CompoundRatioSelected;
        /// <summary>
        /// 删除状态 0：不删除 1：删除
        /// </summary>
        public int delete;

        public bool isLocked = false;

        public virtual RectangleF Rectangle
        {
            get
            {
                return rectangle;
            }
            set
            {
                rectangle = value;
                OnPropertyChanged();
            }
        }

        public virtual double Height
        { get; set; }
        public virtual double Width
        { get; set; }
        /// <summary>
        /// 公开出去的自定义事件
        /// 当对象本身属性有所改变的时候
        /// 比如边长，原点等有变化
        /// </summary>
        public event EventHandler PropertyChanged;
        protected virtual void OnPropertyChanged()
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, EventArgs.Empty);
            }
        }
        /// <summary>
        /// 选中状态改变的事件
        /// </summary>
        public event Action SelectedChanged;

        public ISurfaceBox ISurfaceBox
        {
            set
            {
                this.surfaceBox = value;
            }
            get
            {
                return this.surfaceBox;
            }
        }

        public DrawObject()
        {
            id = this.GetHashCode();
        }

        /// <summary>
        /// Selection flag
        /// </summary>
        public bool Selected
        {
            get
            {
                return selected;
            }
            set
            {
                selected = value;
                SelectedChanged?.Invoke();
            }
        }

        /// <summary>
        /// Color
        /// </summary>
        public Color Color
        {
            get
            {
                return color;
            }
            set
            {
                color = value;
            }
        }

        /// <summary>
        /// Pen width
        /// </summary>
        public int PenWidth
        {
            get
            {
                return penWidth;
            }
            set
            {
                penWidth = value;
            }
        }

        /// <summary>
        /// Number of handles
        /// </summary>
        public virtual int HandleCount
        {
            get
            {
                return 0;
            }
        }

        /// <summary>
        /// Object ID
        /// </summary>
        public int ID
        {
            get { return id; }
            set { id = value; }
        }

        /// <summary>
        /// Last used color
        /// </summary>
        public static Color LastUsedColor
        {
            get
            {
                return lastUsedColor;
            }
            set
            {
                lastUsedColor = value;
            }
        }

        /// <summary>
        /// Last used pen width
        /// </summary>
        public static int LastUsedPenWidth
        {
            get
            {
                return lastUsedPenWidth;
            }
            set
            {
                lastUsedPenWidth = value;
            }
        }

        #region 虚函数

        /// <summary>
        /// Clone this instance.
        /// </summary>
        public abstract DrawObject Clone();

        public virtual DrawObject Clone(ISurfaceBox ISurfaceBox) { return null; }

        /// <summary>
        /// Draw object
        /// </summary>
        /// <param name="g"></param>
        public virtual void Draw(Graphics g)
        {
        }

        public abstract RectangleF GetBoundingBox();

        /// <summary>
        /// Get handle pointscroll by 1-based number
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public virtual PointF GetHandle(int handleNumber)
        {
            return new PointF(0, 0);
        }

        /// <summary>
        /// Get handle rectangle by 1-based number
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public virtual Rectangle GetHandleRectangle(int handleNumber)
        {
            PointF point = GetHandle(handleNumber);

            int tempLess;
            int tempPlus;

            if (isFollow)
            {
                if (smallRectangleWidth == 0)
                {
                    tempLess = (int)(6 * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                    tempPlus = (int)(12 * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                }
                else
                {
                    tempLess = (int)((smallRectangleWidth / 2) * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                    tempPlus = (int)(smallRectangleWidth * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                }
            }
            else
            {
                if (smallRectangleWidth == 0)
                {
                    tempLess = (int)(6 * 1);
                    tempPlus = (int)(12 * 1);
                }
                else
                {
                    tempLess = (int)((smallRectangleWidth / 2) * 1);
                    tempPlus = (int)(smallRectangleWidth * 1);
                }
            }

            return new Rectangle((int)(point.X - tempLess), (int)(point.Y - tempLess), tempPlus, tempPlus);
        }


        /// <summary>
        /// Get handle rectangle by 1-based number
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public virtual PointF[] GetHandlePoint(int handleNumber)
        {
            PointF point = GetHandle(handleNumber);

            int tempLess;
            int tempPlus;

            if (isFollow)
            {
                if (smallRectangleWidth == 0)
                {
                    tempLess = (int)(6 * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                    tempPlus = (int)(12 * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                }
                else
                {
                    tempLess = (int)((smallRectangleWidth / 2) * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                    tempPlus = (int)(smallRectangleWidth * (this.surfaceBox.ScaleRatio < 1 ? 1 / this.surfaceBox.ScaleRatio : 1));
                }
            }
            else {
                if (smallRectangleWidth == 0)
                {
                    tempLess = (int)(6 * 1);
                    tempPlus = (int)(12 * 1);
                }
                else
                {
                    tempLess = (int)((smallRectangleWidth / 2) * 1);
                    tempPlus = (int)(smallRectangleWidth *  1);
                }
            }

            PointF point1 = new PointF(point.X,point.Y - tempLess);
            PointF point2 = new PointF(point.X - tempLess, point.Y + tempLess);
            PointF point3 = new PointF(point.X + tempLess, point.Y + tempLess);

            return new PointF[3] { point1,point2,point3 };
        }

        /// <summary>
        /// Draw tracker for selected object
        /// </summary>
        /// <param name="g"></param>
        public virtual void DrawTracker(Graphics g)
        {
            if (!Selected)
                return;

            SolidBrush brush = new SolidBrush(Color.FromArgb(MarkpointAreaColor));
            Pen pen = new Pen(Color.FromArgb(MarkpointLineColor),MarkpointLineWidth);

            for (int i = 1; i <= HandleCount; i++)
            {
                switch (MarkpointStyle) 
                {
                    case 0:
                        g.FillRectangle(brush, GetHandleRectangle(i));
                        g.DrawRectangle(pen, GetHandleRectangle(i));
                        break;
                    case 1:
                        g.FillEllipse(brush, GetHandleRectangle(i));
                        g.DrawEllipse(pen, GetHandleRectangle(i));
                        break;
                    case 2:
                        g.FillPolygon(brush, GetHandlePoint(i));
                        g.DrawPolygon(pen, GetHandlePoint(i));
                        break;
                }
            }
            brush.Dispose();
            pen.Dispose();
        }

        /// <summary>
        /// Hit test.
        /// Return value: -1 - no hit
        ///                0 - hit anywhere
        ///                > 1 - handle number
        /// </summary>
        /// <param name="pointscroll"></param>
        /// <returns></returns>
        public virtual int HitTest(Point point)
        {
            return -1;
        }
        /// <summary>
        /// 获取鼠标按下时的坐标
        /// </summary>
        /// <param name="point"></param>
        public virtual void MouseDownPoint(Point point)
        {
        }
        public virtual void MouseUp(bool up)
        {
        }
        /// <summary>
        /// Test whether pointscroll is inside of the object
        /// </summary>
        /// <param name="pointscroll"></param>
        /// <returns></returns>
        protected virtual bool PointInObject(Point point)
        {
            return false;
        }


        /// <summary>
        /// Get cursor for the handle
        /// </summary>
        /// <param name="handleNumber"></param>
        /// <returns></returns>
        public virtual Cursor GetHandleCursor(int handleNumber)
        {
            return Cursors.Default;
        }

        /// <summary>
        /// Test whether object intersects with rectangle
        /// </summary>
        /// <param name="rectangle"></param>
        /// <returns></returns>
        public virtual bool IntersectsWith(Rectangle rectangle)
        {
            return false;
        }

        /// <summary>
        /// Move object
        /// </summary>
        /// <param name="deltaX"></param>
        /// <param name="deltaY"></param>
        public virtual void Move(int deltaX, int deltaY)
        {
            OnPropertyChanged();
        }

        /// <summary>
        /// Move handle to the pointscroll
        /// </summary>
        /// <param name="pointscroll"></param>
        /// <param name="handleNumber"></param>
        public virtual void MoveHandleTo(Point point, int handleNumber)
        {
            OnPropertyChanged();
        }

        public virtual void MoveHandleTo(PointF point, int handleNumber)
        {
            OnPropertyChanged();
        }

        /// <summary>
        /// Dump (for debugging)
        /// </summary>
        public virtual void Dump()
        {
            Trace.WriteLine(this.GetType().Name);
            Trace.WriteLine("Selected = " +
                selected.ToString(CultureInfo.InvariantCulture)
                + " ID = " + id.ToString(CultureInfo.InvariantCulture));
        }

        /// <summary>
        /// Normalize object.
        /// Call this function in the end of object resizing.
        /// </summary>
        public virtual void Normalize()
        {
            this.Rectangle = GetNormalizedRectangleF(this.Rectangle);
        }

        public static RectangleF GetNormalizedRectangleF(RectangleF r)
        {
            return GetNormalizedRectangleF(r.X, r.Y, r.X + r.Width, r.Y + r.Height);
        }

        public static RectangleF GetNormalizedRectangleF(PointF p1, PointF p2)
        {
            return GetNormalizedRectangleF(p1.X, p1.Y, p2.X, p2.Y);
        }

        public static RectangleF GetNormalizedRectangleF(float x1, float y1, float x2, float y2)
        {
            if (x2 < x1)
            {
                float tmp = x2;
                x2 = x1;
                x1 = tmp;
            }

            if (y2 < y1)
            {
                float tmp = y2;
                y2 = y1;
                y1 = tmp;
            }

            return new RectangleF(x1, y1, (x2 - x1), (y2 - y1));
        }

        public static Rectangle GetNormalizedRectangle(RectangleF r)
        {
            return GetNormalizedRectangle(r.X, r.Y, r.X + r.Width, r.Y + r.Height);
        }

        public static Rectangle GetNormalizedRectangle(PointF p1, PointF p2)
        {
            return GetNormalizedRectangle(p1.X, p1.Y, p2.X, p2.Y);
        }

        public static Rectangle GetNormalizedRectangle(float x1, float y1, float x2, float y2)
        {
            if (x2 < x1)
            {
                float tmp = x2;
                x2 = x1;
                x1 = tmp;
            }

            if (y2 < y1)
            {
                float tmp = y2;
                y2 = y1;
                y1 = tmp;
            }

            return new Rectangle((int)x1, (int)y1, (int)(x2 - x1), (int)(y2 - y1));
        }

        /// <summary>
        /// Save object to serialization stream
        /// </summary>
        /// <param name="info"></param>
        /// <param name="orderNumber"></param>
        public virtual void SaveToStream(SerializationInfo info, int orderNumber)
        {
            info.AddValue(
                String.Format(CultureInfo.InvariantCulture,
                    "{0}{1}",
                    entryColor, orderNumber),
                Color.ToArgb());

            info.AddValue(
                String.Format(CultureInfo.InvariantCulture,
                "{0}{1}",
                entryPenWidth, orderNumber),
                PenWidth);
        }

        /// <summary>
        /// Load object from serialization stream
        /// </summary>
        /// <param name="info"></param>
        /// <param name="orderNumber"></param>
        public virtual void LoadFromStream(SerializationInfo info, int orderNumber)
        {
            int n = info.GetInt32(
                String.Format(CultureInfo.InvariantCulture,
                    "{0}{1}",
                    entryColor, orderNumber));

            Color = Color.FromArgb(n);

            PenWidth = info.GetInt32(
                String.Format(CultureInfo.InvariantCulture,
                "{0}{1}",
                entryPenWidth, orderNumber));

            id = this.GetHashCode();
        }

        /// <summary>
        /// 用于返回组成标注/测量/视场的所有的点的集合
        /// 暂时没有想到有特殊的数据需要处理，想到再说
        /// </summary>
        /// <returns></returns>
        public virtual List<PointF> GetPoints()
        {
            return null;
        }

        public virtual ParentStyleModel GetStyle()
        {
            return null;
        }

        public virtual string GetContent()
        {
            return "";
        }
        #endregion

        #region 其它方法

        /// <summary>
        /// Initialization
        /// </summary>
        protected void Initialize()
        {
            color = lastUsedColor;
            penWidth = LastUsedPenWidth;
        }

        /// <summary>
        /// Copy fields from this instance to cloned instance drawObject.
        /// Called from Clone functions of derived classes.
        /// </summary>
        protected void FillDrawObjectFields(DrawObject drawObject)
        {
            drawObject.selected = this.selected;
            drawObject.color = this.color;
            drawObject.penWidth = this.penWidth;
            drawObject.ID = this.ID;
        }

        #endregion

    }
}