using iTextSharp.text;
using iTextSharp.text.pdf;
using System.Text;
using YLErp.BLL;
using YLErp.Configuration;
using YLErp.Modules.TradeDalModule;
using YLErp.Office.iTextModule;

namespace YLErp.Modules.TradeModule.DealModule
{
    /// <summary>
    /// 变更确认书生成
    /// </summary>
    public class ChangeConfirmBookGenerator : TradeServiceBase
    {
        public ChangeConfirmBookGenerator(YLBaseService baseService) : base(baseService)
        {
        }

        public ChangeConfirmBookGenerator(OptUserInfo userInfo) : base(userInfo)
        {
        }


        /// <summary>
        /// 生成变更确认书并返回文件生成路径
        /// </summary>
        public string GenerateChangeConfirmBook(int tradeId, out string errorMsg)
        {
            errorMsg = null;

            if (!PS.Config.TradeElement.IsGenerateAmendDoc)
            {
                return null;
            }

            //var td = DbContext.trade.FirstOrDefault(n => n.id == tradeId);
            var td = new TradeDalService(this).GetTradeOrEodTrade(new[] { tradeId }, SystemValueDate).FirstOrDefault();

            if (td.TradeStatus != ConsTrade.确认成交)
            {
                throw new ServiceException("交易状态不是确认成交");
            }

            var changes = new TradeAuditLogService(this).GetLastConfirmChangeMsg(tradeId);
            if (changes == null || !changes.Any())
            {
                errorMsg = "没有交易确认变更的信息";
                return null;
            }

            //--------------------------------------------------
            // 生成交易变更文档
            //--------------------------------------------------

            //设置文件夹名称
            var saveFileDir = OtcAppContext.MapPath("~/App_Docs/ChangeConfirmBook");
            if (!Directory.Exists(saveFileDir))
            {
                Directory.CreateDirectory(saveFileDir);
            }

            var fileName = $"{td.TradeNumber}交易变更确认书{DateTime.Now:yyyyMMddHHmmss}.pdf";
            var filePath = Path.Combine(saveFileDir, fileName);

            var document = new Document(HeaderAndFooterEvent.rect);
            var writer = PdfWriter.GetInstance(document, new FileStream(filePath, FileMode.Create));
            try
            {
                document.Open();
                writer.PageEvent = new HeaderAndFooterEvent();

                HeaderAndFooterEvent.PAGE_NUMBER = true; //实现页眉跟页脚  
                HeaderAndFooterEvent.tpl = writer.DirectContent.CreateTemplate(1000, 1000); //定义模板

                HeaderAndFooterEvent.HeaderLeft = "";
                HeaderAndFooterEvent.HeaderRight = "";

                //每次在添加文本内容之前可以先设置字体，有效期持续到重新设置之前
                HeaderAndFooterEvent.SetFont(BaseColor.DARK_GRAY, "宋体", 16, Font.BOLD);
                document.Add(HeaderAndFooterEvent.AddParagraph("交易信息变更确认书", 1, 1.5f));

                //每次在添加文本内容之前可以先设置字体，有效期持续到重新设置之前
                HeaderAndFooterEvent.SetFont(BaseColor.DARK_GRAY, "宋体", 12);
                //增加空行
                document.Add(HeaderAndFooterEvent.AddParagraph("            ", 0, 1.5f));

                #region 添加变更信息

                var contentSB = new StringBuilder();
                contentSB.Append($"经双方协商确定，编号为{td.TradeNumber}的交易信息，");
                foreach (var change in changes)
                {
                    contentSB.Append(change.DisplayName).Append("由")
                        .Append(change.OldValue).Append("变更为").Append(change.NewValue).AppendLine(";");
                }
                //添加信息
                HeaderAndFooterEvent.SetFont(BaseColor.DARK_GRAY, "宋体", 12);
                document.Add(HeaderAndFooterEvent.AddParagraph(contentSB.ToString(), 0, 1.5f));

                #endregion

                HeaderAndFooterEvent.SetFont(BaseColor.DARK_GRAY, "宋体", 12);
                //增加空行
                document.Add(HeaderAndFooterEvent.AddParagraph("            ", 0, 1.5f));

                var clientInfo = $"{PS.Config.CompanyName ?? ""}  {td.ClientName}  {valuedateBLL.ValueDate:yyyy年M月d日}";
                //添加客户信息
                HeaderAndFooterEvent.SetFont(BaseColor.DARK_GRAY, "宋体", 12, Font.BOLD);
                document.Add(HeaderAndFooterEvent.AddParagraph(clientInfo, 2, 1.5f));

                var webPath = "/App_Docs/ChangeConfirmBook/" + fileName;

                //保存文件路径
                SaveTradeMeta(td.id, "变更确认书", webPath);

                return webPath;
            }
            catch (Exception ex)
            {
                LogFactory.GetLogger("生成变更确认书出错").Error(ex, "交易编号:" + td.TradeNumber);
                throw new ServiceException("生成变更确认书出错", ex);
            }
            finally
            {
                document?.Close();
            }
        }
    }
}