using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace WeChatServerServices.WeiXin.GenHtml
{
    public class GenHtmlHelper
    {
        string AppendSign = "<!--$AppendKey:4c751cd8-b7da-4787-b166-818ab328146e-->";

        #region 模板标签处理
        /// <summary>
        /// 模板模型类
        /// </summary>
        public class WxTemplateModel
        {
            Dictionary<string, string> _WxTempData = new Dictionary<string, string>();
            public Dictionary<string, string> WxTempData
            {
                get { return _WxTempData; }
                set { _WxTempData = value; }
            }


            List<object> _WxForeach = new List<object>();
            public List<object> WxForeach
            {
                get { return _WxForeach; }
                set { _WxForeach = value; }
            }
        }

        /// <summary>
        /// 模板标签处理
        /// </summary>
        /// <param name="sb">模板文件</param>
        /// <param name="model">生成文件的数据模型</param>
        /// <param name="ForeachTemplate">模板中循环的标签代码块</param>
        /// <returns></returns>
        public StringBuilder ReplaceSign(ref StringBuilder sb, WxTemplateModel model, string ForeachTemplate)
        {
            StringBuilder s = sb;
            try
            {
                //TempData标签处理
                foreach (string key in model.WxTempData.Keys)
                {
                    sb.Replace("$WxTempData[" + key + "]", model.WxTempData[key]);
                }

                string newHtml = ForeachTemplate;
                newHtml = newHtml.Replace("$WxForeachStart", "<!--s-->");
                newHtml = newHtml.Replace("$WxForeachEnd", "<!--e-->");
                string tempstr = "";
                //Foreach标签处理
                if (!string.IsNullOrEmpty(ForeachTemplate))
                {
                    foreach (var obj in model.WxForeach)
                    {
                        tempstr += newHtml;
                        var pinfo = obj.GetType().GetProperties();
                        foreach (var p in pinfo)
                        {
                            string v = string.Format("{0}", p.GetValue(obj));
                            string r = string.Format("$WxForeach.{0}", p.Name);
                            tempstr = tempstr.Replace(r, v);
                        }
                    }
                }
                sb.Replace(ForeachTemplate, tempstr);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return sb;
        }

        /// <summary>
        /// 追加记录(扩展方法)
        /// </summary>
        /// <param name="sb"></param>
        /// <param name="model"></param>
        /// <param name="ForeachTemplate"></param>
        /// <returns></returns>
        public StringBuilder AppendExt(ref StringBuilder sb, WxTemplateModel model, string ForeachTemplate)
        {
            StringBuilder s = sb;
            try
            {
                string newHtml = ForeachTemplate;
                newHtml = newHtml.Replace("$WxForeachStart", "<!--s-->");
                newHtml = newHtml.Replace("$WxForeachEnd", "<!--e-->");
                string tempstr = "";
                //Foreach标签处理
                if (!string.IsNullOrEmpty(ForeachTemplate))
                {
                    foreach (var obj in model.WxForeach)
                    {
                        tempstr += newHtml;
                        var pinfo = obj.GetType().GetProperties();
                        foreach (var p in pinfo)
                        {
                            string v = string.Format("{0}", p.GetValue(obj));
                            string r = string.Format("$WxForeach.{0}", p.Name);
                            tempstr = tempstr.Replace(r, v);
                        }
                    }
                }
                tempstr += AppendSign;
                sb.Replace(AppendSign, tempstr);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return sb;
        }
        #endregion

        #region 读写模板文件
        /// <summary>
        /// 获取模板文件
        /// </summary>
        /// <param name="ForeachTemplate">模板中循环的标签代码块</param>
        /// <param name="path">模板路径</param>
        /// <returns></returns>
        public StringBuilder GetTemplate(out string ForeachTemplate, string path = "")
        {
            ForeachTemplate = "";
            StringBuilder htmltext = new StringBuilder();
            if (string.IsNullOrEmpty(path))
                path = System.AppDomain.CurrentDomain.BaseDirectory + "/WeiXin/GenHtml/Template/chatlog.html";

            try
            {
                using (StreamReader sr = new StreamReader(path))
                {
                    //1循环标签开始
                    int sign = 0;
                    String line;
                    while ((line = sr.ReadLine()) != null)
                    {
                        htmltext.Append(line);

                        if (line.IndexOf("$WxForeachStart") >= 0)
                            sign = 1;
                        if (sign == 1)
                            ForeachTemplate += line;
                        if (line.IndexOf("$WxForeachEnd") >= 0)
                            sign = 0;
                    }
                    sr.Close();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return htmltext;
        }

        /// <summary>
        /// 获取已存在的html页面
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public StringBuilder GetExtHtml(string path)
        {
            StringBuilder htmltext = new StringBuilder();
            try
            {
                using (StreamReader sr = new StreamReader(path))
                {
                    String line;
                    while ((line = sr.ReadLine()) != null)
                    {
                        htmltext.Append(line);
                    }
                    sr.Close();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return htmltext;
        }

        /// <summary>
        /// 保存html文伯
        /// </summary>
        /// <param name="htmltext">html文件</param>
        /// <param name="savePath">文件保存路径(根目录下的路径)</param>
        /// <returns></returns>
        public bool SaveHtmlFile(StringBuilder htmltext, string savePath, int tableMaxtCount)
        {
            bool r = false;
            try
            {
                if (string.IsNullOrEmpty(savePath))
                    throw new Exception("文件路径不能为空！");

                var htmlDocument = new HtmlAgilityPack.HtmlDocument();
                string htmlstr = htmltext.ToString();
                htmlDocument.LoadHtml(htmlstr);
                var baseInfo = htmlDocument.GetElementbyId("TemplateTableSetMaxCount");
                var trs = baseInfo.SelectNodes("tbody/tr");
                if (trs != null && trs.Count > tableMaxtCount)
                {
                    int c = trs.Count;
                    for (int i = 0; i < c - tableMaxtCount; i++)
                    {
                        var delinfo = trs.FirstOrDefault();
                        trs.Remove(delinfo);
                        htmltext.Replace(delinfo.OuterHtml, "");
                        //WX.CRM.Common.LogHelper.Info(delinfo.OuterHtml);
                    }
                }

                //路径如果不存在则创建路径
                string tempPath = savePath.Substring(0, savePath.LastIndexOf('/'));
                if (!Directory.Exists(tempPath))
                {
                    DirectoryInfo directoryInfo = new DirectoryInfo(tempPath);
                    directoryInfo.Create();
                }
                //保存文件
                using (StreamWriter sw = new StreamWriter(savePath, false, System.Text.Encoding.GetEncoding("UTF-8")))
                {
                    sw.WriteLine(htmltext);
                    sw.Flush();
                    sw.Close();
                }
                r = true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return r;
        }
        #endregion

    }
}