using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text.RegularExpressions;

namespace LYFZ.Software.MainBusiness.ReportPrint
{
    /// <summary>
    /// <类名>    PrinterDrawMethod 
    /// <描述>    用于打印的绘图函数 
    /// <作者>    藏锋 
    /// <日期>    2017年11月23日
    /// </summary>
    public static class PrinterDrawMethod
    {
        #region 静态变量;
        // 画刷;
        public static SolidBrush _drawBrush = new SolidBrush( Color.Black );
        // 自动缩放是否使用页边距;
        public static bool AutoScaleNotMargion = true;
        #endregion

        /// <summary>
        /// 文本填充类型
        /// </summary>
        public enum TextPaddingType
        {
            // 正常模式;
            TP_Normal = 0X00001,
            // 自动换行;
            TP_AutoLine = 0X00002,
            // 自动缩放;
            TP_AutoScale = 0X00004,
            // cell自动
            TP_AutoCell = 0X00008

        }

        #region 打印绘图函数
        /// <summary>
        /// 绘制文本框;(换行的字符未处理!!!!)
        /// </summary>
        /// <param name="grahpics">绘图对象</param>
        /// <param name="strText">要绘制的文本</param>
        /// <param name="rcDisplay">文本要显示的区域</param>
        /// <param name="fontSize">文本字号</param>
        /// <param name="fontName">文本字体</param>
        /// <param name="autoWrap">是否自动换行,如果使用自动换行,则自动缩放不处理</param>
        /// <param name="autoScale">字号是否自动缩放,如果自动缩放,则自动换行不处理</param>
        /// <param name="showFrame">是否显示边框</param>
        /// <param name="nWrapLineSpace">换行时的行间距</param>
        public static int DrawCellTextAutroWrap( Graphics grahpics, string strText, Rectangle rcDisplay, Font textFont, bool autoWrap = true, int nWrapLineSpace = 3, bool showFrame = true )
        {
            // 文本索引;
            int nIndex = 0;
            // 行数;
            int nRowsCount = 0;
            // 所有行总高;
            int nRowsHeight = 0;
            // 显示区域结果;
            Rectangle rcResult = rcDisplay;
            // 获取指定的 Font 绘制的指定字符串大小;
            SizeF textfontSize = grahpics.MeasureString( strText, textFont );
            // 换行的文本;
            List<string> listText = new List<string>();
            // 画刷;
            SolidBrush drawBrush = new SolidBrush( Color.Black );

            if ( autoWrap )
            { // 自动换行;
                // 换行符字符串数组;
                List<string> listWrapText = Regex.Split( strText, "\r\n", RegexOptions.IgnoreCase ).ToList();
                foreach ( string text in listWrapText )
                {
                    strText = text;
                    nIndex = strText.Length;
                    textfontSize = grahpics.MeasureString( strText, textFont );
                    while ( textfontSize.Width > rcDisplay.Width )
                    {
                        textfontSize = grahpics.MeasureString( strText.Substring( 0, --nIndex ), textFont );
                        if ( textfontSize.Width < rcDisplay.Width )
                        {
                            // 行数自增;
                            nRowsCount++;
                            // 添加新行文本;
                            listText.Add( strText.Substring( 0, nIndex ) );
                            // 剩余文本;
                            strText = strText.Substring( nIndex );
                            // 重置索引;
                            nIndex = strText.Length;
                            // 重新获取剩余行字体宽高;
                            textfontSize = grahpics.MeasureString( strText, textFont );
                        }
                    }

                    // 是否有剩余文本;
                    if ( !string.IsNullOrEmpty( strText ) )
                    {
                        listText.Add( strText );
                        nRowsCount++;
                    }
                }

                // 计算行总高;
                nRowsHeight = (int)Math.Ceiling( nRowsCount * ( textfontSize.Height + nWrapLineSpace ) );
                // 设置显示结果区域;
                rcResult.Height = nRowsHeight; //向上取整;

                // 重新输出所有文本;
                for ( int i = 0; i < listText.Count; i++ )
                {
                    grahpics.DrawString( listText[i], textFont, drawBrush, new RectangleF( rcDisplay.Left, rcDisplay.Top + i * textfontSize.Height + ( i + 1 ) * nWrapLineSpace, rcDisplay.Width, textfontSize.Height ) );
                }
            }
            else
            { // 不换行,则可能显示不完全;
                grahpics.DrawString( strText, textFont, drawBrush, new RectangleF( rcDisplay.Left, rcDisplay.Top + nWrapLineSpace, rcDisplay.Width, textfontSize.Height ) );
            }

            // 是否画边框;
            if ( showFrame )
                grahpics.DrawRectangle( new Pen( drawBrush ), rcResult );

            // 返回所有行总高;
            return nRowsHeight;
        }

        /// <summary>
        /// 绘制文本框;
        /// </summary>
        /// <param name="grahpics">绘图对象</param>
        /// <param name="strText">要绘制的文本</param>
        /// <param name="rcDisplay">文本要显示的区域</param>
        /// <param name="fontSize">文本字号</param>
        /// <param name="fontName">文本字体</param>
        /// <param name="autoWrap">是否自动换行,如果使用自动换行,则自动缩放不处理</param>
        /// <param name="autoScale">字号是否自动缩放,如果自动缩放,则自动换行不处理</param>
        /// <param name="showFrame">是否显示边框</param>
        /// <param name="nWrapLineSpace">换行时的行间距</param>
        public static int DrawCellTextAutroWrap( Graphics grahpics, string strText, Rectangle rcDisplay, Single fontSize, string fontName, bool autoWrap = true, int nWrapLineSpace = 3, bool showFrame = true )
        {
            // 文本索引;
            int nIndex = 0;
            // 行数;
            int nRowsCount = 0;
            // 所有行总高;
            int nRowsHeight = 0;
            // 显示区域结果;
            Rectangle rcResult = rcDisplay;
            // 创建字体;
            Font textFont = new Font( fontName, fontSize );
            // 获取指定的 Font 绘制的指定字符串大小;
            SizeF textfontSize = grahpics.MeasureString( strText, textFont );
            // 换行的文本;
            List<string> listText = new List<string>();
            // 画刷;
            SolidBrush drawBrush = new SolidBrush( Color.Black );

            if ( autoWrap )
            { // 自动换行;
                // 换行符字符串数组;
                List<string> listWrapText = Regex.Split( strText, "\r\n", RegexOptions.IgnoreCase ).ToList();
                foreach ( string text in listWrapText )
                {
                    strText = text;
                    nIndex = strText.Length;
                    textfontSize = grahpics.MeasureString( strText, textFont );
                    while ( textfontSize.Width > rcDisplay.Width )
                    {
                        textfontSize = grahpics.MeasureString( strText.Substring( 0, --nIndex ), textFont );
                        if ( textfontSize.Width < rcDisplay.Width )
                        {
                            // 行数自增;
                            nRowsCount++;
                            // 添加新行文本;
                            listText.Add( strText.Substring( 0, nIndex ) );
                            // 剩余文本;
                            strText = strText.Substring( nIndex );
                            // 重置索引;
                            nIndex = strText.Length;
                            // 重新获取剩余行字体宽高;
                            textfontSize = grahpics.MeasureString( strText, textFont );
                        }
                    }

                    // 是否有剩余文本;
                    if ( !string.IsNullOrEmpty( strText ) )
                    {
                        listText.Add( strText );
                        nRowsCount++;
                    }
                }

                // 计算行总高;
                nRowsHeight = (int)Math.Ceiling( nRowsCount * ( textfontSize.Height + nWrapLineSpace ) );
                // 设置显示结果区域;
                rcResult.Height = nRowsHeight; //向上取整;

                // 重新输出所有文本;
                for ( int i = 0; i < listText.Count; i++ )
                {
                    grahpics.DrawString( listText[i], textFont, drawBrush, new RectangleF( rcDisplay.Left, rcDisplay.Top + i * textfontSize.Height + ( i + 1 ) * nWrapLineSpace, rcDisplay.Width, textfontSize.Height ) );
                }
            }
            else
            { // 不换行,则可能显示不完全;
                grahpics.DrawString( strText, textFont, drawBrush, new RectangleF( rcDisplay.Left, rcDisplay.Top + nWrapLineSpace, rcDisplay.Width, textfontSize.Height ) );
            }

            // 是否画边框;
            if ( showFrame )
                grahpics.DrawRectangle( new Pen( drawBrush ), rcResult );

            // 返回所有行总高;
            return nRowsHeight;
        }

        /// <summary>
        /// 计算缩放字体;
        /// </summary>
        /// <param name="grahpics"></param>
        /// <param name="strText"></param>
        /// <param name="rcDisplay"></param>
        /// <param name="textFont"></param>
        /// <param name="minFontSize"></param>
        /// <returns></returns>
        public static Font ComputeAutoScaleFont( Graphics grahpics, string strText, Rectangle rcDisplay, Font textFont, Single minFontSize = 6 )
        {
            // 字符索引;
            int nIndex = 0;
            // 行数;
            int nRowsCount = 0;
            // 所有行总高;
            int nRowsHeight = 0;
            // 缩放字体;
            Font scaleFont = textFont;
            // 字体名称;
            string fontName = textFont.Name;
            // 字体大小;
            Single fontSize = textFont.Size;
            // 获取指定的 Font 绘制的指定字符串大小;
            SizeF textfontSize = grahpics.MeasureString( strText, scaleFont );
            // 换行符字符串数组;
            List<string> listWrapText = Regex.Split( strText, "\r\n", RegexOptions.IgnoreCase ).ToList();
        again:
            foreach ( string text in listWrapText )
            {
                strText = text;
                nIndex = strText.Length;
                textfontSize = grahpics.MeasureString( strText, scaleFont );
                while ( textfontSize.Width > rcDisplay.Width )
                {
                    textfontSize = grahpics.MeasureString( strText.Substring( 0, --nIndex ), scaleFont );
                    if ( textfontSize.Width < rcDisplay.Width )
                    {
                        // 行数自增;
                        nRowsCount++;
                        // 剩余文本;
                        strText = strText.Substring( nIndex );
                        // 重置字符索引;
                        nIndex = strText.Length;
                        // 重新计算剩余文本大小;
                        textfontSize = grahpics.MeasureString( strText, scaleFont );
                    }
                }

                // 是否有剩余文本;
                if ( !string.IsNullOrEmpty( strText ) )
                {
                    nRowsCount++;
                }
            }

            // 计算行总高;
            nRowsHeight = (int)Math.Ceiling( nRowsCount * textfontSize.Height );
            if ( rcDisplay.Height < nRowsHeight && fontSize > minFontSize )
            {
                // 字号递减;
                fontSize--;
                // 新建缩放字体;
                scaleFont = new Font( fontName, fontSize );
                // 重置行数;
                nRowsCount = 0;
                // 回执goto;
                goto again;
            }

            // 返回缩放字体;
            return scaleFont;
        }

        public static Font ComputeAutoScaleFontEx( Graphics grahpics, string strText, Rectangle rcDisplay, Font textFont, Single minFontSize = 6 )
        {
            Font scaleFont = textFont;
            string fontName = textFont.Name;
            Single fontSize = textFont.Size;
            Rectangle rcResult = ComputeTextCell( grahpics, strText, rcDisplay, scaleFont );
            while ( rcResult.Height > rcDisplay.Height && fontSize > minFontSize )
                rcResult = ComputeTextCell( grahpics, strText, rcDisplay, scaleFont = new Font( fontName, --fontSize ) );

            // 返回缩放字体;
            return scaleFont;
        }

        /// <summary>
        /// 绘制文本框;
        /// </summary>
        /// <param name="grahpics">绘图对象</param>
        /// <param name="strText">要绘制的文本</param>
        /// <param name="rcDisplay">文本要显示的区域</param>
        /// <param name="fontSize">文本字号</param>
        /// <param name="fontName">文本字体</param>
        /// <param name="autoWrap">是否自动换行,如果使用自动换行,则自动缩放不处理</param>
        /// <param name="autoScale">字号是否自动缩放,如果自动缩放,则自动换行不处理</param>
        /// <param name="showFrame">是否显示边框</param>
        /// <param name="nWrapLineSpace">换行时的行间距</param>
        /// <param name="minFontSize"></param>
        public static int DrawCellTextAutroScale( Graphics grahpics, string strText, Rectangle rcDisplay, Font textFont, bool autoScale = true, bool showFrame = true, Single minFontSize = 6 )
        {
            // 新建缩放字体 ;
            Font scaleFont = textFont;
            // 字体名称;
            string fontName = textFont.Name;
            // 字号;
            Single fontSize = textFont.Size;
            // 获取指定的 Font 绘制的指定字符串大小;
            SizeF textfontSize = grahpics.MeasureString( strText, textFont );
            // 画刷;
            SolidBrush drawBrush = new SolidBrush( Color.Black );
            // 字体递减;
            if ( autoScale )
            {
                while ( textfontSize.Width > rcDisplay.Width && fontSize > minFontSize )
                {
                    fontSize--;
                    textfontSize = grahpics.MeasureString( strText, scaleFont = new Font( fontName, fontSize ) );
                }
            }

            // 上边空白区域值;
            int nTopMargin = ( rcDisplay.Height - (int)Math.Ceiling( textfontSize.Height ) ) <= 0 ? 0 : (int)Math.Ceiling( ( rcDisplay.Height - textfontSize.Height ) / 2 );
            // 垂直居中显示;
            grahpics.DrawString(
                strText,
                scaleFont,
                drawBrush,
                new RectangleF( rcDisplay.Left, rcDisplay.Top + ( AutoScaleNotMargion ? nTopMargin : 0 ), rcDisplay.Width, textfontSize.Height ) );

            // 是否显示边框;
            if ( showFrame )
                grahpics.DrawRectangle( new Pen( drawBrush ), rcDisplay );

            // 返回新高;
            return (int)Math.Ceiling( textfontSize.Height ) + ( AutoScaleNotMargion ? nTopMargin : 0 );
        }

        /// <summary>
        /// 绘制文本框;
        /// </summary>
        /// <param name="grahpics">绘图对象</param>
        /// <param name="strText">要绘制的文本</param>
        /// <param name="rcDisplay">文本要显示的区域</param>
        /// <param name="fontSize">文本字号</param>
        /// <param name="fontName">文本字体</param>
        /// <param name="autoWrap">是否自动换行,如果使用自动换行,则自动缩放不处理</param>
        /// <param name="autoScale">字号是否自动缩放,如果自动缩放,则自动换行不处理</param>
        /// <param name="showFrame">是否显示边框</param>
        /// <param name="nWrapLineSpace">换行时的行间距</param>
        /// <param name="minFontSize"></param>
        public static int DrawCellTextAutroScale( Graphics grahpics, string strText, Rectangle rcDisplay, Single fontSize, string fontName, bool autoScale = true, bool showFrame = true, Single minFontSize = 6 )
        {
            Font textFont = new Font( fontName, fontSize );
            // 获取指定的 Font 绘制的指定字符串大小;
            SizeF textfontSize = grahpics.MeasureString( strText, textFont );
            // 画刷;
            SolidBrush drawBrush = new SolidBrush( Color.Black );
            if ( autoScale )
            {
                while ( textfontSize.Width > rcDisplay.Width && fontSize > minFontSize )
                {
                    fontSize--;
                    textfontSize = grahpics.MeasureString( strText, textFont = new Font( fontName, fontSize ) );
                }
            }

            // 上边空白区域值;
            int nTopMargin = ( rcDisplay.Height - (int)Math.Ceiling( textfontSize.Height ) ) <= 0 ? 0 : (int)Math.Ceiling( ( rcDisplay.Height - textfontSize.Height ) / 2 );
            // 垂直居中显示;
            grahpics.DrawString(
                strText,
                textFont,
                drawBrush,
                new RectangleF( rcDisplay.Left, rcDisplay.Top + ( AutoScaleNotMargion ? nTopMargin : 0 ), rcDisplay.Width, textfontSize.Height ) );

            // 是否显示边框;
            if ( showFrame )
                grahpics.DrawRectangle( new Pen( drawBrush ), rcDisplay );

            // 返回新高;
            return (int)Math.Ceiling( textfontSize.Height ) + ( AutoScaleNotMargion ? nTopMargin : 0 );
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="grahpics"></param>
        /// <param name="strText"></param>
        /// <param name="rcText"></param>
        /// <param name="fText"></param>
        /// <param name="brush"></param>
        /// <returns></returns>
        public static Rectangle ComputeTextCell( Graphics grahpics, string strText, Rectangle rcDisplay, Font textFont )
        {
            // 字符索引;
            int nIndex = 0;
            // 换行行数;
            int nRowsCount = 0;
            // 获取文本宽高;
            SizeF textfontSize = grahpics.MeasureString( strText, textFont );
            // 换行符字符集;
            List<string> listText = Regex.Split( strText, "\r\n", RegexOptions.IgnoreCase ).ToList();
            foreach ( string text in listText )
            {
                strText = text;
                nIndex = strText.Length;
                textfontSize = grahpics.MeasureString( strText, textFont );
                while ( textfontSize.Width > rcDisplay.Width )
                {
                    textfontSize = grahpics.MeasureString( strText.Substring( 0, --nIndex ), textFont );
                    if ( textfontSize.Width < rcDisplay.Width )
                    {
                        // 行数自增;
                        nRowsCount++;
                        // 剩余文本;
                        strText = strText.Substring( nIndex );
                        // 重置索引;
                        nIndex = strText.Length;
                        // 重新获取剩余行字体宽高;
                        textfontSize = grahpics.MeasureString( strText, textFont );
                    }
                }

                // 是否有剩余文本;
                if ( !string.IsNullOrEmpty( strText ) )
                {
                    nRowsCount++;
                }
            }

            // 返回新区域;
            return new Rectangle( rcDisplay.X, rcDisplay.Y, rcDisplay.Width, (int)Math.Ceiling( textfontSize.Height * nRowsCount ) );
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="grahpics"></param>
        /// <param name="strText"></param>
        /// <param name="rcDisplay"></param>
        /// <param name="textFont"></param>
        /// <param name="colorBackground"></param>
        /// <param name="paddingType"></param>
        /// <param name="showFrame"></param>
        public static void DrawCell( Graphics grahpics, string strText, Rectangle rcDisplay, Font textFont, Color colorBackground, TextPaddingType paddingType, bool showFrame = true )
        {

        }
        #endregion
    }
}