// Copyright (c) 2012, Outercurve Foundation.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// - Redistributions of source code must  retain  the  above copyright notice, this
//   list of conditions and the following disclaimer.
//
// - Redistributions in binary form  must  reproduce the  above  copyright  notice,
//   this list of conditions  and  the  following  disclaimer in  the documentation
//   and/or other materials provided with the distribution.
//
// - Neither  the  name  of  the  Outercurve Foundation  nor   the   names  of  its
//   contributors may be used to endorse or  promote  products  derived  from  this
//   software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,  BUT  NOT  LIMITED TO, THE IMPLIED
// WARRANTIES  OF  MERCHANTABILITY   AND  FITNESS  FOR  A  PARTICULAR  PURPOSE  ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL,  SPECIAL,  EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO,  PROCUREMENT  OF  SUBSTITUTE  GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  HOWEVER  CAUSED AND ON
// ANY  THEORY  OF  LIABILITY,  WHETHER  IN  CONTRACT,  STRICT  LIABILITY,  OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING  IN  ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

using System;
using System.Collections.Generic;
using System.IO;
using System.Windows.Forms;

namespace WebsitePanel.Setup
{
	/// <summary>
	/// Shows copy process.
	/// </summary>
	public sealed class CopyProcess
	{
		private ProgressBar progressBar;
		private DirectoryInfo sourceFolder;
		private DirectoryInfo destFolder;

		/// <summary>
		/// Initializes a new instance of the class.
		/// </summary>
		/// <param name="bar">Progress bar.</param>
		/// <param name="source">Source folder.</param>
		/// <param name="destination">Destination folder.</param>
		public CopyProcess(ProgressBar bar, string source, string destination)
		{
			this.progressBar = bar;
			this.sourceFolder = new DirectoryInfo(source);
			this.destFolder = new DirectoryInfo(destination);
		}

		/// <summary>
		/// Copy source to the destination folder.
		/// </summary>
		internal void Run()
		{
			// unzip
			long totalSize = FileUtils.CalculateFolderSize(sourceFolder.FullName);
			long copied = 0;
			progressBar.Minimum = 0;
			progressBar.Maximum = 100;
			progressBar.Value = 0;

			int i = 0;
			List<DirectoryInfo> folders = new List<DirectoryInfo>();
			List<FileInfo> files = new List<FileInfo>();

			DirectoryInfo di = null;
			//FileInfo fi = null;
			string path = null;

			// Part 1: Indexing
			folders.Add(sourceFolder);
			while (i < folders.Count)
			{
				foreach (DirectoryInfo info in folders[i].GetDirectories())
				{
					if (!folders.Contains(info))
						folders.Add(info);
				}
				foreach (FileInfo info in folders[i].GetFiles())
				{
					files.Add(info);
				}
				i++;
			}

			// Part 2: Destination Folders Creation
			///////////////////////////////////////////////////////
			for (i = 0; i < folders.Count; i++)
			{
				if (folders[i].Exists)
				{
					path = destFolder.FullName +
						Path.DirectorySeparatorChar +
						folders[i].FullName.Remove(0, sourceFolder.FullName.Length);

					di = new DirectoryInfo(path);

					// Prevent IOException
					if (!di.Exists)
						di.Create();
				}
			}

			// Part 3: Source to Destination File Copy
			///////////////////////////////////////////////////////
			for (i = 0; i < files.Count; i++)
			{
				if (files[i].Exists)
				{
					path = destFolder.FullName +
						Path.DirectorySeparatorChar +
						files[i].FullName.Remove(0, sourceFolder.FullName.Length + 1);
					FileUtils.CopyFile(files[i], path);
					copied += files[i].Length;
					if (totalSize != 0)
					{
						progressBar.Value = Convert.ToInt32(copied * 100 / totalSize);
					}
				}
			}
		}
	}
}