using GeoSigmaDrawLib;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using UCDraw;

namespace KevServer
{
    public class WebDrawToolSelect : WebDrawTool
    {
        private Point pointStart = new Point(0, 0);
        private Point pointPrev = new Point(0, 0);
        private Point pointCur = new Point(0, 0);
        public Point CacheImgLocation { get; set; } = new Point(0, 0);
        public WebDrawToolSelect() : base()
        {
            ToolCursor = CursorType.Select;
            ItemType = DrawItemType.ITEM_SELECT;
        }

        public WebDrawToolSelect(GeoSigmaXY geo)
            : this()
        {
            this.Geo = geo;
        }

        public override void Start()
        {
            base.Start();
        }
        public Bitmap OnLButtonDown(MouseEventArgs e, Keys key = Keys.None)
        {
            Bitmap bmpBack = null;
            bool bMoving = Geo.SelectIsOnMoving();
            Geo.OnLButtonDown(e.X, e.Y, IntPtr.Zero);
            bMoving = Geo.SelectIsOnMoving();
            pointStart = e.Location;
            pointPrev = new Point(e.X, e.Y);

            // 移动轮廓图
            if (Geo.SelectIsOnMoving())
            {
                int kind = Geo.Select_GetKindOfSelectedElement();
                if ((DrawElementType)kind == DrawElementType.ELEMENT_MESH
                    && Geo.SelectGetCount() == 1)
                {
                    return bmpBack;
                }
                try
                {
                    int nLeft = 0, nTop = 0, nRight = 0, nBottom = 0;
                    Geo.SelectGetTrackerRect(ref nLeft, ref nTop, ref nRight, ref nBottom);
                    bmpBack = new Bitmap(nRight - nLeft + 1, nBottom - nTop + 1,
                    PixelFormat.Format16bppRgb555);
                    Graphics gBack = Graphics.FromImage(bmpBack);
                    gBack.Clear(Color.White);
                    IntPtr pBmpDC = gBack.GetHdc();
                    Geo.SelectDrawTrackPath(pBmpDC);
                    gBack.ReleaseHdc();
                    CacheImgLocation = new Point(nLeft, nTop);
                    // bmpBack.Save("C:\\temp\\bmpSelect.bmp", ImageFormat.Bmp);
                    //bmpBack.MakeTransparent(Color.White);
                }
                catch (Exception ex)
                {
                    Trace.WriteLine("图形放的太大了！\r\n" + ex.Message);
                }
            }
            else
            {
                return bmpBack;
            }
            return bmpBack;
        }
        public bool OnLButtonUp(MouseEventArgs e, Keys key = Keys.None)
        {
            //Bitmap bmp = (Bitmap)drawArea.Bmp.Clone();
            if (Geo == null)
            {
                return false;
            }
            Geo.OnLButtonUp(e.X, e.Y, IntPtr.Zero, key);

            //if (drawArea.PaintingImage != null)
            //{
            //    drawArea.Bmp = (Bitmap)drawArea.PaintingImage.Clone();
            //    drawArea.PaintingImage = null;
            //}
            // 判断选中数量和是否移动状态
            if (Geo.SelectStatusChanged() == false && Geo.SelectGetCount() == 0)
            {
                return false;
            }
            return true;
        }
        /// <summary>
        /// Moves the elements to.
        /// </summary>
        /// <param name="x">The x.</param>
        /// <param name="y">The y.</param>
        /// <returns>A bool.</returns>
        public bool MoveElementsTo(int x, int y)
        {
            if (Geo == null)
            {
                return false;
            }
            this.Geo.SelectMoveElementsTo(x, y);
            return true;
        }
        public int OnMouseMove(MouseEventArgs e)
        {
            //Trace.WriteLine($"{e.X}, {e.Y}");
            if (e.X == pointPrev.X && e.Y == pointPrev.Y)
            {
                return -2;
            }
            // Trace.WriteLine($"{DateTime.Now}:{e.X},{e.Y}--{pointPrev.X},{pointPrev.Y}");
            //if (cursorType == -1)
            //{
            //    drawArea.Cursor = ToolCursor;
            //}
            int handleType = -2;
            handleType = Geo.SelectSetCursor(e.X, e.Y);
            //bool shiftPressed = (Control.ModifierKeys & Keys.Shift) == Keys.Shift;
            //if (shiftPressed == true && handleType == 5)
            //{
            //    handleType = -1;
            //}
            pointPrev.X = e.X;
            pointPrev.Y = e.Y;

            return handleType;
        }
        public void SelectAll()
        {
            Geo.Select_SelectAll();
        }
    }
}