using PaintDotNet.Annotation.Enum;
using System.Drawing;
using System.Windows.Forms;

namespace PaintDotNet.Annotation.Measure
{
    /// <summary>
    /// 测量->点垂线->点垂线
    /// </summary>
    public class ToolMeasurePointHLine : ToolMeasureObject
    {
        private static MeasurePointHLine newPLine;
        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 (newPLine == null)
                {
                    newPLine = new MeasurePointHLine(drawArea, p.X, p.Y, true);
                    newPLine.ISurfaceBox = drawArea;
                    AddNewObject(drawArea, newPLine);
                }
                drawArea.Refresh();
                if (clickCount == 3)
                {
                    newPLine.pointChange = false;
                    clickCount = 0;
                    newPLine = null;
                    OnMouseUpTwo(drawArea, e);
                    if (!drawArea.ContinuousDrawingMeasure())
                        drawArea.ActiveTool = DrawToolType.Pointer;
                }
            }
            else
            {
                if(newPLine != null)
                {
                    if ((e.Clicks == 1 && clickCount == 1) || (e.Clicks == 2 && clickCount < 3))
                    {
                        for (int i = 0; i < drawArea.GraphicsList.Count; i++)
                        {
                            if (drawArea.GraphicsList[i].drawToolType == newPLine.drawToolType)
                            {
                                drawArea.GraphicsList.RemoveAt(i);
                                break;
                            }
                        }
                    }
                }

                OnMouseNotLeftDown(drawArea, newPLine);

                if (newPLine != null)
                    newPLine.pointChange = false;
                clickCount = 0;
                newPLine = null;
                OnMouseUpTwo(drawArea, e);
                if (!drawArea.ContinuousDrawingMeasure())
                {
                    drawArea.ActiveTool = DrawToolType.Pointer;
                }
            }
        }

        /// <summary>
        /// 鼠标移动，需要进行绘制
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public static void OnMouseMove(ISurfaceBox drawArea, MouseEventArgs e)
        {
            Point pointscroll = GetEventPointInArea(drawArea, e.Location);
            if (newPLine != null)
            {
                if (clickCount < 3)
                {
                    if (drawArea.GraphicsList[0] != null)
                    {
                        if (clickCount == 1)
                        {
                            if (newPLine.pointArray.Count == 1)
                                newPLine.setNextPoint(new Point(pointscroll.X, (int)newPLine.pointArray[0].Y));
                            else
                                newPLine.pointArray[1] = new Point(pointscroll.X, (int)newPLine.pointArray[0].Y);
                        }
                        if (clickCount == 2)
                        {
                            if (newPLine.pointArray.Count == 2)
                                newPLine.setNextPoint(pointscroll);
                            else
                                newPLine.pointArray[2] = pointscroll;
                        }

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

        public static void OnMouseClick(ISurfaceBox drawArea, 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()
        {
            newPLine = null;
            clickCount = 0;
        }
    }
}