using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using WinFormControl;

namespace ButcherFactory.WeightCount_
{
  public partial class DiscontWeightSetDialog : Form
  {
    BindingList<DiscontSetting> list;

    public DiscontWeightSetDialog()
    {
      InitializeComponent();

      this.Load += DiscontWeightSetDialog_Load;
    }

    void DiscontWeightSetDialog_Load(object sender, EventArgs e)
    {
      list = DiscontSetting.Load();
      mGrid.DataSource = list;
      mGrid.Refresh();
      BindTotalLbl();
    }

    private void addBtn_Click(object sender, EventArgs e)
    {
      var name = nameBox.Text.Trim();
      if (string.IsNullOrEmpty(name))
        throw new Exception("请输入扣重项");
      if (list.Any(x => x.Name == name))
        throw new Exception("名称已存在");
      decimal discont;
      if (!decimal.TryParse(discontBox.Text.Trim(), out discont))
        throw new Exception("标准重输入不正确");
      if (discont == 0)
        throw new Exception("标准值不能为0");


      list.Insert(0, new DiscontSetting { Name = name, Standard = discont, Number = 0 });
      mGrid.Refresh();
    }

    private void okBtn_Click(object sender, EventArgs e)
    {
      DiscontSetting.Save(list);
      DialogResult = DialogResult.OK;
    }

    SolidBrush btnBrush = new SolidBrush(Color.LightBlue);

    private void mGrid_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
      if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
      {
        if (this.mGrid.Columns[e.ColumnIndex].HeaderText == "数量")
        {
          StringFormat sf = StringFormat.GenericDefault.Clone() as StringFormat;//设置重绘入单元格的字体样式
          sf.FormatFlags = StringFormatFlags.DisplayFormatControl;
          sf.Alignment = StringAlignment.Center;
          sf.LineAlignment = StringAlignment.Center;
          sf.Trimming = StringTrimming.EllipsisCharacter;

          e.PaintBackground(e.CellBounds, false);//重绘边框
          var entity = this.mGrid.Rows[e.RowIndex].DataBoundItem as DiscontSetting;
          //设置要写入字体的大小
          System.Drawing.Font myFont = new System.Drawing.Font("宋体", 15F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
          SizeF sizeDel = e.Graphics.MeasureString("-", myFont);
          SizeF sizeMod = e.Graphics.MeasureString(entity.Number.ToString(), myFont);
          SizeF sizeLook = e.Graphics.MeasureString("+", myFont);

          float fDel = sizeDel.Width / (sizeDel.Width + sizeMod.Width + sizeLook.Width); //
          float fMod = sizeMod.Width / (sizeDel.Width + sizeMod.Width + sizeLook.Width);
          float fLook = sizeLook.Width / (sizeDel.Width + sizeMod.Width + sizeLook.Width);

          //设置每个“按钮的边界”
          RectangleF rectDel = new RectangleF(e.CellBounds.Left, e.CellBounds.Top, e.CellBounds.Width * fDel, e.CellBounds.Height);
          RectangleF rectMod = new RectangleF(rectDel.Right, e.CellBounds.Top, e.CellBounds.Width * fMod, e.CellBounds.Height);
          RectangleF rectLook = new RectangleF(rectMod.Right, e.CellBounds.Top, e.CellBounds.Width * fLook, e.CellBounds.Height);
          e.Graphics.FillRectangles(btnBrush, new RectangleF[] { rectDel });
          e.Graphics.DrawString("-", myFont, Brushes.Black, rectDel, sf); //绘制“按钮”
          e.Graphics.DrawString(entity.Number.ToString(), myFont, Brushes.Black, rectMod, sf);
          e.Graphics.FillRectangles(btnBrush, new RectangleF[] { rectLook });
          e.Graphics.DrawString("+", myFont, Brushes.Black, rectLook, sf);
          e.Handled = true;
        }
      }
    }

    private void mGrid_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
    {
      if (e.ColumnIndex >= 0 && e.RowIndex >= 0)
      {
        if (this.mGrid.Columns[e.ColumnIndex].HeaderText == "删除")
        {
          var itemName = mGrid.CurrentRow.Cells[1].Value.ToString();
          var tag = list.First(x => x.Name == itemName);
          list.Remove(tag);
          mGrid.Refresh();
          BindTotalLbl();
          return;
        }
        Point curPosition = e.Location;//当前鼠标在当前单元格中的坐标
        if (this.mGrid.Columns[e.ColumnIndex].HeaderText == "数量")
        {
          Graphics g = this.mGrid.CreateGraphics();
          System.Drawing.Font myFont = new System.Drawing.Font("宋体", 15F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(134)));

          var entity = this.mGrid.Rows[e.RowIndex].DataBoundItem as DiscontSetting;

          SizeF sizeDel = g.MeasureString("-", myFont);
          SizeF sizeMod = g.MeasureString(entity.Number.ToString(), myFont);
          SizeF sizeLook = g.MeasureString("+", myFont);
          float fDel = sizeDel.Width / (sizeDel.Width + sizeMod.Width + sizeLook.Width);
          float fMod = sizeMod.Width / (sizeDel.Width + sizeMod.Width + sizeLook.Width);
          float fLook = sizeLook.Width / (sizeDel.Width + sizeMod.Width + sizeLook.Width);

          Rectangle rectTotal = new Rectangle(0, 0, this.mGrid.Columns[e.ColumnIndex].Width, this.mGrid.Rows[e.RowIndex].Height);
          RectangleF rectDel = new RectangleF(rectTotal.Left, rectTotal.Top, rectTotal.Width * fDel, rectTotal.Height);
          RectangleF rectMod = new RectangleF(rectDel.Right, rectTotal.Top, rectTotal.Width * fMod, rectTotal.Height);
          RectangleF rectLook = new RectangleF(rectMod.Right, rectTotal.Top, rectTotal.Width * fLook, rectTotal.Height);

          //判断当前鼠标在哪个“按钮”范围内
          if (rectDel.Contains(curPosition))//-
            SubStract(entity);
          else if (rectMod.Contains(curPosition))
          {
            var keyBoard = new NumberPad();
            if (keyBoard.ShowDialog() == true)
            {
              var v = 0;
              if (int.TryParse(keyBoard.Result, out v) && v >= 0)
              {
                entity.Number = v;
                mGrid.Refresh();
                BindTotalLbl();
              }
              else
                throw new Exception("输入数量有误！");
            }
          }
          else if (rectLook.Contains(curPosition))//+
            Add(entity);
        }
      }
    }

    private void SubStract(DiscontSetting entity)
    {
      if (entity.Number == 0)
        return;
      entity.Number -= 1;
      mGrid.Refresh();
      BindTotalLbl();
    }

    private void Add(DiscontSetting entity)
    {
      entity.Number += 1;
      mGrid.Refresh();
      BindTotalLbl();
    }

    void BindTotalLbl()
    {
      totalLbl.Text = string.Format("{0:#0.##}", list.Sum(x => x.Weight));
    }
  }
}