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 System.IO;
using VEPROMS.CSLA.Library;
using JR.Utils.GUI.Forms;

namespace VEPROMS
{
	public partial class dlgPrintAllApprovedProcedures : DevComponents.DotNetBar.Office2007Form
	{
		private static readonly log4net.ILog _MyLog = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
		private StringBuilder NotApproved;
		private DocVersionInfo _DocVersionInfo = null;
		private int unitId = 0;
		public dlgPrintAllApprovedProcedures(DocVersionInfo dvi)
		{
			InitializeComponent();
			_DocVersionInfo = dvi;
			unitId = (_DocVersionInfo.DocVersionConfig.SelectedSlave < 0) ? 0 : _DocVersionInfo.DocVersionConfig.SelectedSlave; // set unitId to zero if not Parent/Child
			NotApproved = new StringBuilder();
			txbApprovedPDFsPath.Text = BuildInitialPDFPath(); // set to default approved PDF path
		}
		// create an approved PDFs path based on the user's Documents folder and the tree path to the working draft
		private string BuildInitialPDFPath()
		{
			// start with the SearchDVPath which is the node path staring with the top of the PROMS Procedure tree (VEPROMS)
			string rtnstr =  _DocVersionInfo.ActiveParent.SearchDVPath;

			// remove top tree node (VEPROMS) and put a " - " between each tree node name
			rtnstr = rtnstr.Substring(rtnstr.IndexOf("\a") + 1).Replace("\a", " - ");

			// add the user's path to the My Documments folder to the start of the path
			rtnstr = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + "\\" + rtnstr;

			// check if we are printing Approved Child Procedures
			// if SelectedSlave is > 0 then we are printing Approved Child Procedures and
			// subtract one from the index (unitId) into the list of child names (UnitNames)
			if (unitId > 0)
				rtnstr += "\\" + _DocVersionInfo.UnitNames[unitId - 1]; // append Child name to path
			return rtnstr;
		}

		private void ppBtnPDFLoc_Click(object sender, EventArgs e)
		{
			if (txbApprovedPDFsPath.Text.Length > 0)
				ApprovedPDFsFolderDlg.SelectedPath = txbApprovedPDFsPath.Text;
			DialogResult dr = ApprovedPDFsFolderDlg.ShowDialog();
			if (dr == DialogResult.OK)
			{
				txbApprovedPDFsPath.Text = ApprovedPDFsFolderDlg.SelectedPath;
			}
		}

		private bool FolderIsWritable(string dirPath)
		{
			try
			{
				using (FileStream fs = File.Create(Path.Combine(dirPath, Path.GetRandomFileName()), 1,	FileOptions.DeleteOnClose))
				{ }
				return true;
			}
			catch
			{
				return false;
			}
		}

		private void btnPrntAllAprv_Click(object sender, EventArgs e)
		{
			try
			{
				// Create folder if needed, clear the folder 
				if (!Directory.Exists(txbApprovedPDFsPath.Text))
					Directory.CreateDirectory(txbApprovedPDFsPath.Text);

				// check if the folder location is writable
				if (!FolderIsWritable(txbApprovedPDFsPath.Text))
				{
					MessageBox.Show("Cannot Write to this folder.\n\nSelect a different location.", "Invalid Folder Access", MessageBoxButtons.OK, MessageBoxIcon.Error);
					btnPrntAllAprv.Enabled = false;
				}
				else
				{
					int pdfCount = 0;
					DeleteExistingPDFs(); // delete existing PDFs in the target folder
										  // Get the Child index for Parent/Child procedure - if not Parent/Child this will be zero
					foreach (ProcedureInfo myProc in _DocVersionInfo.Procedures)
					{
						RevisionInfoList ril = RevisionInfoList.GetByItemID(myProc.ItemID);
						if (ril.Count == 0)
						{
							NotApproved.AppendLine(string.Format("No approved Version for {0}", (myProc.PDFNumber.Length > 0) ? myProc.PDFNumber : myProc.DisplayText));
						}
						else
						{
							bool foundApproved = false;
							foreach (RevisionInfo revinfo in ril)
							{
								// if not Parent/Child, "unitId" and "Applicability_index" will be zero
								if (unitId == revinfo.MyConfig.Applicability_Index)
								{
									if (revinfo.LatestVersion.MyStage.IsApproved > 0)
									{
										foundApproved = true;
										ItemInfo ii = ItemInfo.Get(revinfo.ItemID);
										ii.MyDocVersion.DocVersionConfig.SelectedSlave = unitId;
										ProcedureInfo prcInfo = ProcedureInfo.Get(ii.ItemID);
										SaveApprovedPDFToFolder(revinfo, prcInfo.PDFNumber);// save PDF to folder
										pdfCount++;
										break; // got the latest Approved - jump out of foreach revision info loop
									}
								}
							}
							if (!foundApproved) NotApproved.AppendLine(string.Format("No approved Version for {0}", myProc.PDFNumber));

						}
					}
					// if no Approved PDFs were save, display general message and exit
					if (pdfCount == 0)
					{
						string msg = "There are no Approved Procedure PDFs in this procedure set.\n\n Approved Procedures PDFs are created when a procedure is approved using the PROMS Approval function.";
						FlexibleMessageBox.Show(msg, "Print PDFs Completed", MessageBoxButtons.OK, MessageBoxIcon.Warning);
					}
					else // we saved some approved PDFs tell user how many were saved and list procedures that were not approved
					{
						string msg = string.Format("{0} PDFs were saved at\n\n{1}", pdfCount, txbApprovedPDFsPath.Text);
						if (NotApproved.Length > 0)
						{
							msg += string.Format("\n\n--------------------------------------------\n\nPDFs for the Following were not Generated:\n\n{0}", NotApproved.ToString());
						}
						FlexibleMessageBox.Show(msg, "Print PDFs Completed", MessageBoxButtons.OK, MessageBoxIcon.Information);
					}
				}
			}
			catch (Exception ex)
			{
				_MyLog.Error("Print All Approved PDFs", ex);// save error in PROMS error log
				MessageBox.Show(ex.Message, ex.GetType().FullName, MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
			this.Close(); // close dialog
		}
		private void SaveApprovedPDFToFolder(RevisionInfo revInfo,string PDFName)
		{
			byte[] buffer = revInfo.LatestVersion.PDF;
			string PDFFilePath = string.Format("{0}\\{1}.PDF", txbApprovedPDFsPath.Text, PDFName);
			try
			{
				FileStream fs = new FileStream(PDFFilePath, FileMode.Create);
				fs.Write(buffer, 0, buffer.Length);
				fs.Close();
			}
			catch (Exception ex)
			{
				string str = string.Format("Could not create {0}", PDFFilePath);
				NotApproved.AppendLine(str); // save to list of procedure that were not approved
				_MyLog.Info(str, ex);// save error in PROMS error log
			}

		}
		private void DeleteExistingPDFs()
		{
			DirectoryInfo di = new DirectoryInfo(txbApprovedPDFsPath.Text);
			FileInfo[] fis;
			//DirectoryInfo[] diAry = di.GetDirectories(txbApprovedPDFsPath.Text);
			//DirectoryInfo di_fmtgen;
			// remove all of the PDF fils
			//di_fmtgen = diAry[0];
			try
			{
				fis = di.GetFiles("*.pdf");
				foreach (FileInfo fi in fis)
				{
					if (fi.IsReadOnly) fi.IsReadOnly = false;
					fi.Delete();
				}
			}
			catch (Exception ex)
			{
				string str = string.Format("Cannot delete files in {0}", txbApprovedPDFsPath.Text);
				MessageBox.Show(str, "Error deleting files", MessageBoxButtons.OK, MessageBoxIcon.Error);
				_MyLog.Info(str, ex); // save error in PROMS error log

			}
		}
		private void txbApprovedPDFsPath_TextChanged(object sender, EventArgs e)
		{
			btnPrntAllAprv.Enabled = txbApprovedPDFsPath.Text.Length > 0;
		}

		private void btnCancel_Click(object sender, EventArgs e)
		{
			this.Close();
		}
	}
}