// This file is part of the Noddybox.WindowsPhone C# suite.
//
// Noddybox.Emulation is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Noddybox.Emulation is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Noddybox.Emulation.  If not, see <http://www.gnu.org/licenses/>.
//
// Copyright (c) 2012 Ian Cowburn
//
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;

namespace Noddybox.WindowsPhone.Silverlight.ViewModels
{
    /// <summary>
    /// Provides a common view model for all file dialogs.
    /// </summary>
    public class FileDialogViewModel : BaseViewModel
    {
        #region Private data

        private string filename;
        private string path;
        private List<FileInfo> fileList;
        private string mask;

        #endregion
        
        #region Private members

        private void GetFileList()
        {
            FileList = FileInfo.GetFiles(path, Mask);
        }

        #endregion

        #region Bindable properties

        /// <summary>
        /// Get/set the filename.
        /// </summary>
        public string Filename
        {
            get {return filename;}
            set {SetValue(ref filename, value, "Filename", "IsFileSelected");}
        }

        /// <summary>
        /// Get whether there is a filename.
        /// </summary>
        public bool IsFileSelected
        {
            get {return !String.IsNullOrWhiteSpace(filename);}
        }


        /// <summary>
        /// Get the list of files.
        /// </summary>
        public List<FileInfo> FileList
        {
            get {return fileList;}
            set {SetValue(ref fileList, value, "FileList"); }
        }

        /// <summary>
        /// Get/set the current path.
        /// </summary>
        public string Path
        {
            get {return path;}
            set
            {
                SetValue(ref path, value, "Path");
                Filename = String.Empty;
                GetFileList();
            }
        }

        /// <summary>
        /// The file mask to use.
        /// </summary>
        public string Mask
        {
            get {return mask;}
            set
            {
                SetValue(ref mask, value, "Mask");
                Filename = String.Empty;
                GetFileList();
            }
        }

        #endregion

        #region Public members

        /// <summary>
        /// Get the path of the selected file.
        /// </summary>
        public string SelectedFile
        {
            get {return path + Filename;}
        }

        /// <summary>
        /// Refresh the current directory listing.
        /// </summary>
        public void RefreshFileList()
        {
            Filename = String.Empty;
            GetFileList();
        }

        /// <summary>
        /// Called when a file is selected.
        /// </summary>
        /// <param name="file">The selected file.</param>
        public void FileSelected(FileInfo file)
        {
            if (file.IsFolder)
            {
                string newPath = path;

                if (file.Name != "..")
                {
                    newPath += file.Name + "/";
                }
                else
                {
                    if (newPath.Length > 1)
                    {
                        string[] parts = newPath.Split(new char[] {'/'}, StringSplitOptions.RemoveEmptyEntries);

                        newPath = "/";

                        for(int f = 0; f < parts.Length-1; f++)
                        {
                            newPath += parts[f] + "/";
                        }
                    }
                    else
                    {
                        newPath = "/";
                    }
                }

                Path = newPath;
            }
            else
            {
                Filename = file.Name;
            }
        }

        #endregion

        #region Constructors

        /// <summary>
        /// Construct the view model.
        /// </summary>
        /// <param name="startPath">The path to start selecting from.</param>
        public FileDialogViewModel(string startPath)
        {
            Mask = "*";
            path = startPath;
            Filename = String.Empty;
            GetFileList();
        }

        #endregion
    }
}