using System;
using System.Collections.Generic;
using System.Text;
using System.Data.Sql;
using System.Data.SqlClient;
// Add .Net Reference Microsoft.SqlServer.ConnectionInfo
using Microsoft.SqlServer.Management.Common;
// Add .Net Reference Microsoft.SqlServer.Smo
using Microsoft.SqlServer.Management.Smo;

namespace DataLoader
{
	public delegate void SQLScriptRunnerEvent(object sender, SqlInfoMessageEventArgs args);
	public class SQLScriptRunner
	{
		public event SQLScriptRunnerEvent InfoMessage;
		public void OnInfoMessage(object sender, SqlInfoMessageEventArgs args)
		{
			if (InfoMessage != null) InfoMessage(sender, args);
		}
		private string _Script;
		public string Script
		{
			get { return _Script; }
			set { _Script = value; }
		}
		private string _ConnectionString;
		public string ConnectionString
		{
			get { return _ConnectionString; }
			set { _ConnectionString = value; }
		}
		public SQLScriptRunner(string script, string connectionString)
		{
			_Script = script;
			_ConnectionString = connectionString;
		}
		public SQLScriptRunner(string dbName, string backupFolder, string connectionString, DateTime dateTime, string suffix)
		{
			_Script = string.Format("Backup database [{0}] to disk = '{1}\\{0}_{2}{3}.BAK'\r\n" +
				"GO\r\nPRINT '{0} backed up to {1}\\{0}_{2}{3}.BAK'", 
				dbName, backupFolder, dateTime.ToString("yyyyMMdd_HHmm"),suffix);
			_ConnectionString = connectionString;
		}
		public void Run()
		{
			SqlConnection cn = new SqlConnection(ConnectionString);
			cn.Open();
			cn.InfoMessage += new SqlInfoMessageEventHandler(cn_InfoMessage);
			Server srv = new Server(new ServerConnection(cn));
			srv.ConnectionContext.ExecuteNonQuery(Script);
			cn.Close();
		}
		void cn_InfoMessage(object sender, SqlInfoMessageEventArgs e)
		{
			OnInfoMessage(sender, e);
		}
	}
}