using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Drawing;
using System.Windows.Forms;
using PaintDotNet.Annotation.Enum;

namespace PaintDotNet.Annotation.Measure
{
    public class ToolMeasureBrokenLine : ToolMeasureObject
    {
        private static MeasureBrokenLine newBrokenLine;
        private static int clickCount = 0; //辅助计算点击次数

        /// <summary>
        /// Left nouse button is pressed
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public static void OnMouseDown(ISurfaceBox drawArea, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left && e.Clicks != 2)
            {
                clickCount += 1;
                Point p = GetEventPointInArea(drawArea, e.Location);
                if (newBrokenLine == null)
                {
                    newBrokenLine = new MeasureBrokenLine(drawArea, p.X, p.Y, true);
                    newBrokenLine.ISurfaceBox = drawArea;
                    AddNewObject(drawArea, newBrokenLine);
                }
                drawArea.Refresh();
            }
            else
            {
                if(newBrokenLine != null)
                {
                    if (e.Clicks == 2 && clickCount == 1)
                    {
                        for (int i = 0; i < drawArea.GraphicsList.Count; i++)
                        {
                            if (drawArea.GraphicsList[i].drawToolType == newBrokenLine.drawToolType)
                            {
                                drawArea.GraphicsList.RemoveAt(i);
                                break;
                            }
                        }
                    }
                }
                OnMouseNotLeftDown(drawArea, newBrokenLine);
                if (newBrokenLine != null)
                    newBrokenLine.pointChange = false;
                clickCount = 0;
                newBrokenLine = null;
                OnMouseUpTwo(drawArea, e);
                if (!drawArea.ContinuousDrawingMeasure())
                    drawArea.ActiveTool = DrawToolType.Pointer;
            }
        }

        /// <summary>
        /// 目前设计的交互形式是左键点击
        /// 所以鼠标移动什么都不做
        /// 如果交互形式改变，再说
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public static void OnMouseMove(ISurfaceBox drawArea, MouseEventArgs e)
        {
            //drawArea.Cursor = Cursor;

            Point pointscroll = GetEventPointInArea(drawArea, e.Location);

            if (newBrokenLine != null)
            {
                if (drawArea.GraphicsList[0] != null)
                {
                    if (clickCount == 1)
                    {
                        if (newBrokenLine.pointArray.Count == 1)
                            newBrokenLine.setNextPoint(pointscroll);
                        else
                            newBrokenLine.pointArray[1] = pointscroll;
                    }
                    if (clickCount > 1)
                    {
                        if (newBrokenLine.pointArray.Count == clickCount)
                            newBrokenLine.setNextPoint(pointscroll);
                        else
                            newBrokenLine.pointArray[clickCount] = pointscroll;
                    }

                    drawArea.Refresh();
                    drawArea.GraphicsList.Dirty = true;
                }
            }
        }
        /// <summary>
        /// 鼠标抬起事件(连续绘制)
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public static void OnMouseUp(ISurfaceBox drawArea, MouseEventArgs e)
        {
        }

        public static void OnMouseClick(ISurfaceBox surfacebox, MouseEventArgs e)
        {

        }

        /// <summary>
        /// 鼠标左键双击
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public static void OnMouseLeftDoubleClick(ISurfaceBox surfacebox, MouseEventArgs e)
        {

        }

        /// <summary>
        /// 删除按键
        /// </summary>
        /// <param name="surfacebox"></param>
        /// <param name="e"></param>
        public static void OnDelKeyDown(ISurfaceBox surfacebox, MouseEventArgs e)
        {

        }

        /// <summary>
        /// 删除划痕处理&污迹处理选择区域的痕迹
        /// </summary>
        /// <param name="surfacebox"></param>
        /// <param name="e"></param>
        public static void OnDel2KeyDown(ISurfaceBox surfacebox, MouseEventArgs e)
        {

        }

        /// <summary>
        /// 清空全部时调用该方法，将可能未绘制完的对象清空
        /// </summary>
        public static void beginWithNewObject()
        {
            newBrokenLine = null;
            clickCount = 0;
        }
    }
}