using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using System.IO;

namespace PromsGetDoc
{
	class Program
	{
		// arguments are:
		//	docId
		//	filename/pathname for resulting word doc
		//	sql server name
		//	database name

		// Can be run from command line or from macro in microsoft office tools as shown here:
		//		Sub Macro1()
		//      Call Shell("""Path_To_Exe\PromsGetDoc.exe"" 5 C:\temp\sample3.doc .\sqlexpress veproms_app", vbNormalFocus)
		//		End Sub
		static void Main(string[] args)
		{
			if (args.Length != 4)
			{
				Console.WriteLine("Need 4 arguments: DocId, Output File/Path, Server Name, Database Name");
				return;
			}
			Console.WriteLine("Volian Enterprises Proprietary Software - Copyright 2015 \r\n\n" +
				"To be used under the Volian PROMS End User License Agreement (EULA).\r\n\nFor AP-1000 Westinghouse internal use only.\r\n"); 
			byte[] doc = null;
			int _docId = int.Parse(args[0]);
			string connectionStr = string.Format(@"Data Source={0};Initial Catalog={1};Integrated Security=True", args[2], args[3]);
			try
			{
				using (SqlConnection cn = new SqlConnection(connectionStr))
				{
					cn.Open();  // do I need this?
					using (SqlCommand cm = cn.CreateCommand())
					{
						cm.CommandType = CommandType.StoredProcedure;
						cm.CommandText = "getDocument";
						cm.Parameters.AddWithValue("@DocID", _docId);
						cm.CommandTimeout = 100;
						using (SqlDataReader dr = cm.ExecuteReader())
						{
							if (!dr.Read())
							{
								Console.WriteLine("ERROR: No Record Found");
								return;
							}
							doc = (byte[])dr.GetValue(2);
						}
					}
				}
			}
			catch (Exception ex)
			{
				Console.WriteLine("ERROR: Could not access/read data. Check server and database name. " + ex.Message);
				return;
			}
			if (doc != null)
			{
				try
				{
					FileInfo fi = new FileInfo(args[1]);
					FileStream fs = fi.Create();
					fs.Write(doc, 0, doc.Length);
					fs.Close();
					Console.WriteLine("{0} was successfully created.", fi.FullName);
				}
				catch (Exception ex1)
				{
					Console.WriteLine("ERROR: Could not write Word file. " + ex1.Message);
					return;
				}
			}
		}
	}
}