using System;
using System.Drawing;
using System.Windows.Forms;

namespace JinYuan.ControlLib
{
    public partial class LightweightGridPanel : Panel
    {
        public int Rows { get; set; }
        public int Columns { get; set; }
        public int CellSize { get; set; }
        public int HeaderHeight { get; set; }
        public int RowHeaderWidth { get; set; }
        public int BorderWidth { get; set; } = 1;

        private bool _styleSet = false;

        public LightweightGridPanel(int rows, int cols, int cellSize, int headerHeight, int rowHeaderWidth)
        {
            Rows = rows;
            Columns = cols;
            CellSize = cellSize;
            HeaderHeight = headerHeight;
            RowHeaderWidth = rowHeaderWidth;

            DoubleBuffered = true;
            SetControlStyles();
            UpdateStyles();

            CalculateAndSetSize();

            BackColor = Color.FromArgb(28, 40, 55);
            BorderStyle = BorderStyle.FixedSingle;
        }

        /// <summary>
        /// 尺寸计算
        /// </summary>
        private void CalculateAndSetSize()
        {
            // 总宽度 = 行号列宽度 + 列数*单元格尺寸 + (列数+1)*边框宽度
            int totalWidth = RowHeaderWidth + (Columns * CellSize) + (Columns + 1) * BorderWidth;
            // 总高度 = 表头高度 + 行数*单元格尺寸 + (行数+1)*边框宽度
            int totalHeight = HeaderHeight + (Rows * CellSize) + (Rows + 1) * BorderWidth;

            // 关键：设置最小/最大尺寸，同时允许手动调整（避免固定死导致适配问题）
            MinimumSize = new Size(totalWidth, totalHeight);
            Size = MinimumSize;
            MaximumSize = new Size(totalWidth + 100, totalHeight + 100); // 留余量
        }

        private void SetControlStyles()
        {
            if (_styleSet) return;

            // 仅保留必要的双缓冲样式，关闭ResizeRedraw
            SetStyle(ControlStyles.OptimizedDoubleBuffer |
                     ControlStyles.AllPaintingInWmPaint |
                     ControlStyles.UserPaint, true);
            SetStyle(ControlStyles.ResizeRedraw, false);

            _styleSet = true;
        }

        /// <summary>
        /// 控件位置/尺寸计算，确保在可视区域内
        /// </summary>
        public void AddControl(Control ctrl, int row, int col)
        {
            if (ctrl == null) return;

            int x = 0, y = 0;
            int ctrlWidth = 0, ctrlHeight = 0;

            // 左上角角落（行\列）
            if (row == 0 && col == 0)
            {
                x = BorderWidth;
                y = BorderWidth;
                ctrlWidth = RowHeaderWidth - BorderWidth * 2;
                ctrlHeight = HeaderHeight - BorderWidth * 2;
            }
            // 表头列（列号）
            else if (row == 0)
            {
                x = RowHeaderWidth + (col - 1) * (CellSize + BorderWidth) + BorderWidth;
                y = BorderWidth;
                ctrlWidth = CellSize - BorderWidth * 2;
                ctrlHeight = HeaderHeight - BorderWidth * 2;
            }
            // 行号列
            else if (col == 0)
            {
                x = BorderWidth;
                y = HeaderHeight + (row - 1) * (CellSize + BorderWidth) + BorderWidth;
                ctrlWidth = RowHeaderWidth - BorderWidth * 2;
                ctrlHeight = CellSize - BorderWidth * 2;
            }
            // 电池控件（数据区）
            else
            {
                x = RowHeaderWidth + (col - 1) * CellSize + (col) * BorderWidth;
                y = HeaderHeight + (row - 1) * CellSize + (row) * BorderWidth;
                ctrlWidth = CellSize - BorderWidth * 2;
                ctrlHeight = CellSize - BorderWidth * 2;
            }

            // 强制设置控件尺寸（避免尺寸为0）
            ctrl.Size = new Size(Math.Max(10, ctrlWidth), Math.Max(10, ctrlHeight));
            ctrl.Location = new Point(x, y);
            ctrl.Margin = new Padding(0);
            ctrl.Padding = new Padding(0);
            ctrl.Dock = DockStyle.None;
            ctrl.Visible = true; 

            // 确保子控件在最上层绘制
            ctrl.BringToFront();
            Controls.Add(ctrl);
        }


        // 重写SetStyle，直接调用基类
        protected new void SetStyle(ControlStyles flags, bool value)
        {
            base.SetStyle(flags, value);
        }

        protected override void OnSizeChanged(EventArgs e)
        {
            base.OnSizeChanged(e);

            // 确保控件重新布局
            if (Controls.Count > 0)
            {
                Invalidate(); // 触发重绘
            }
        }

        // 添加网格线抗锯齿
        protected override void OnPaint(PaintEventArgs e)
        {
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
            e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;

            base.OnPaint(e);
        }
    }

    
}