using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.IO;
using System.Web.Security;
using System.Text.RegularExpressions;

namespace Yavsc.Controllers
{
	/// <summary>
	/// File system controller.
	/// </summary>
	public class FileSystemController : Controller
	{
		private static string usersDir = "~/users";

		/// <summary>
		/// Gets the users dir.
		/// </summary>
		/// <value>The users dir.</value>
		public static string UsersDir {
			get {
				return usersDir;
			}
		}

		/// <summary>
		/// Index this instance.
		/// </summary>
		[Authorize]
		public ActionResult Index ()
		{
			string user = Membership.GetUser ().UserName;
			ViewData ["UserName"] = user;

			DirectoryInfo di = new DirectoryInfo (
				                   Path.Combine (
					                   Server.MapPath (UsersDir),
					                   user));
			if (!di.Exists)
				di.Create ();
			return View (new FileInfoCollection (di.GetFiles ()));
		}

		/// <summary>
		/// Details the specified id.
		/// </summary>
		/// <param name="id">Identifier.</param>
		public ActionResult Details (string id)
		{
			foreach (char x in Path.GetInvalidPathChars()) {
				if (id.Contains (x)) {
					ViewData ["Message"] =
					string.Format (
						"Something went wrong following the following path : {0} (\"{1}\")",
						id, x);
					return RedirectToAction ("Index");
				}
			}
			string fpath = Path.Combine (BaseDir, id);
			ViewData ["Content"] = Url.Content (fpath);
			FileInfo fi = new FileInfo (fpath);

			return View (fi);
		}

		/// <summary>
		/// Create this instance.
		/// </summary>
		public ActionResult Create ()
		{
			return View ();
		}

		/// <summary>
		/// Create the specified collection.
		/// </summary>
		/// <param name="collection">Collection.</param>
		[HttpPost]
		[Authorize]
		public ActionResult Create (FormCollection collection)
		{
			try {
				string fnre = "[A-Za-z0-9~\\-.]+";
				HttpFileCollectionBase hfc = Request.Files;

				for (int i = 0; i < hfc.Count; i++) {
					if (!Regex.Match (hfc [i].FileName, fnre).Success) {
						ViewData ["Message"] += string.Format ("<p>File name '{0}' refused</p>", hfc [i].FileName);
						ModelState.AddModelError (
							"AFile",
							string.Format (
								"The file name {0} dosn't match an acceptable file name {1}",
								hfc [i].FileName, fnre));
						return View ();
					}
				}
				for (int i = 0; i < hfc.Count; i++) {
					// TODO Limit with hfc[h].ContentLength
					string filename = Path.Combine (Server.MapPath (BaseDir), hfc [i].FileName);
					hfc [i].SaveAs (filename);
					ViewData ["Message"] += string.Format ("<p>File name '{0}' saved</p>", hfc [i].FileName);
				}
				return RedirectToAction ("Index", "FileSystem");
			} catch (Exception e) {
				ViewData ["Message"] = "Exception:" + e.Message;
				return View ();
			}
		}

		/// <summary>
		/// Gets the base dir.
		/// </summary>
		/// <value>The base dir.</value>
		public static string BaseDir { get { return Path.Combine (UsersDir, Membership.GetUser ().UserName); } }

		/// <summary>
		/// Edit the specified id.
		/// </summary>
		/// <param name="id">Identifier.</param>
		public ActionResult Edit (int id)
		{
			return View ();
		}

		/// <summary>
		/// Edit the specified id and collection.
		/// </summary>
		/// <param name="id">Identifier.</param>
		/// <param name="collection">Collection.</param>
		[HttpPost]
		public ActionResult Edit (int id, FormCollection collection)
		{
			try {
				return RedirectToAction ("Index");
			} catch {
				return View ();
			}
		}

		/// <summary>
		/// Delete the specified id.
		/// </summary>
		/// <param name="id">Identifier.</param>
		public ActionResult Delete (int id)
		{
			return View ();
		}

		/// <summary>
		/// Delete the specified id and collection.
		/// </summary>
		/// <param name="id">Identifier.</param>
		/// <param name="collection">Collection.</param>
		[HttpPost]
		public ActionResult Delete (int id, FormCollection collection)
		{
			try {
				return RedirectToAction ("Index");
			} catch {
				return View ();
			}
		}
	}
}