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 iTextSharp.text.pdf;
using iTextSharp.text.xml;
using iTextSharp;
using Excel = Microsoft.Office.Interop.Excel;
using System.Data.OleDb;
using System.Diagnostics;

namespace Procedure_Pdf_Page_Count
{
	public partial class Form1 : Form
	{
		public Form1()
		{
			InitializeComponent();
		}
		string[] pdffiles;
		string selectedPath = "";
		private void btnSelectFolder_Click(object sender, EventArgs e)
		{
			using (var fbd = new FolderBrowserDialog())
			{
				fbd.Description = "Select the PDF folder";
				//fbd.ShowHiddenFiles = true;
				DialogResult result = fbd.ShowDialog();
				selectedPath = fbd.SelectedPath;
				if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
				{
					pdffiles = Directory.GetFiles(fbd.SelectedPath,"*.pdf");

					System.Windows.Forms.MessageBox.Show("Files found: " + pdffiles.Length.ToString(), "Message");
				}
			}
		}

		private void cntPDFPages_Click(object sender, EventArgs e)
		{	
			int totalPages = 0;
			DataTable dt = new DataTable();
			dt.Columns.Add("Procedure", typeof(string));
			dt.Columns.Add("Page Count", typeof(int));
			
			if (selectedPath == "")
			{
				System.Windows.Forms.MessageBox.Show("No folder Seleted.  Please select a folder.");
				return;
			}
			try
			{
				foreach (string ppath in pdffiles)
				{
					PdfReader pdfReader = new PdfReader(ppath);
					int numberOfPages = pdfReader.NumberOfPages;
					totalPages += numberOfPages;
					dt.Rows.Add(new object[] { ppath, numberOfPages });
				}


				dt.DefaultView.Sort = "Page Count desc";
				dt = dt.DefaultView.ToTable();

				lblTotalPages.Text = totalPages.ToString();
				pageCountView.DataSource = dt;
				DataGridViewColumn col = pageCountView.Columns[0];
				col.Width = 350;
				string dtt = DateTime.Now.ToString("MM/dd/yyyy h:mm tt");
				dtt = dtt.Replace('/', '_');
				dtt = dtt.Replace(':', '-');
				dtt = dtt.Replace(' ', '-');
				selectedPath = selectedPath + "\\";

				selectedPath = selectedPath + $"{dtt}.csv";

				var lines = new List<string>();

				string[] columnNames = dt.Columns.Cast<DataColumn>().Select(column => column.ColumnName).ToArray();

				var header = string.Join(",", columnNames);
				lines.Add(header);
				var valueLines = dt.AsEnumerable().Select(row => string.Join(",", row.ItemArray));
				lines.AddRange(valueLines);
				File.WriteAllLines(selectedPath, lines);
				if (File.Exists(selectedPath))
				{
					btnViewReport.Enabled = true;
				}
				else
				{
					System.Windows.Forms.MessageBox.Show("Procedure PDF page report does not exists");
					return;
				}
			}
			catch (Exception ex)
			{
				System.Windows.Forms.MessageBox.Show("An Error has occured.  Please try again. Error: " + ex.Message);
				return;
			}
		}

		private void btnViewReport_Click(object sender, EventArgs e)
		{
			var ExcelApp = new Excel.Application();
			ExcelApp.Workbooks.OpenText(selectedPath, Comma: true);

			ExcelApp.Visible = true;
		}

		//private void pageCountView_CellContentClick(object sender, DataGridViewCellEventArgs e)
		//{
		//	System.Windows.Forms.MessageBox.Show("Row Index: " + e.RowIndex.ToString());
		//}
		private void pageCountView_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
		{
			DataGridViewCell cell =  pageCountView.Rows[e.RowIndex].Cells[e.ColumnIndex];
			//System.Windows.Forms.MessageBox.Show("Double Click Row Index: " + cell.Value.ToString());
			//System.Windows.Forms.DataGridViewTextBoxCell
			Process.Start(cell.Value.ToString());
		}
		private void pageCountView_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
		{
			if ((e.ColumnIndex == pageCountView.Columns["Procedure"].Index)
				&& (e.RowIndex > -1))
			{
				pageCountView.Rows[e.RowIndex].Cells[e.ColumnIndex].ToolTipText = "Double click name to open PDF";
			}
		}
	}
}