using System;

using System.Drawing;

using System.Collections;

using System.Collections.Generic;

using System.ComponentModel;

using System.Windows.Forms;

using Google.GData.Photos;

using Google.GData.Client;

using Google.GData.Extensions.MediaRss;

using Google.GData.Extensions;

using Google.Picasa;

using System.IO;



namespace PhotoBrowser

{

    /// <summary>

	/// Summary description for PhotoBrowser.

	/// </summary>

	public class PictureBrowser : System.Windows.Forms.Form

	{

        private PicasaService picasaService;

        private PicasaFeed photoFeed;

        private System.Windows.Forms.PictureBox PhotoPreview;

        private System.Windows.Forms.ListView PhotoList;

        private System.Windows.Forms.PropertyGrid PhotoInspector;

        private System.Windows.Forms.Label label1;

        private System.Windows.Forms.Label label2;

        private System.Windows.Forms.Button DownloadPhoto;

        private System.Windows.Forms.Button UploadPhoto;

        private System.Windows.Forms.FolderBrowserDialog folderBrowserDialog;

        private System.Windows.Forms.OpenFileDialog openFileDialog;

        private List<UserState> states = new List<UserState>();



        private delegate void SaveAnotherPictureDelegate(UserState us);



        private ProgressBar progressBar;

        private Label FileInfo;

        private Button CancelAsync;

		/// <summary>

		/// Required designer variable.

		/// </summary>

		private System.ComponentModel.Container components = null;







        public PictureBrowser(PicasaService service, bool doBackup)

        {

            //

            // Required for Windows Form Designer support

            //

            InitializeComponent();

            this.picasaService = service;



            this.picasaService.AsyncOperationCompleted += new AsyncOperationCompletedEventHandler(this.OnDone);

            this.picasaService.AsyncOperationProgress += new AsyncOperationProgressEventHandler(this.OnProgress);



            if (doBackup == true)

            {

                this.DownloadPhoto.Enabled = false;

                this.DownloadPhoto.Visible = false;

                this.UploadPhoto.Enabled = false;

                this.UploadPhoto.Visible = false;

            }

        }



        public void StartQuery(string uri, string albumTitle)

        {

            UserState us = new UserState();

            this.states.Add(us);



            us.opType = UserState.OperationType.query;

            us.filename = albumTitle;



            this.picasaService.QueryFeedAync(new Uri(uri), DateTime.MinValue, us);

        }



		/// <summary>

		/// Clean up any resources being used.

		/// </summary>

		protected override void Dispose( bool disposing )

		{

			if( disposing )

			{

				if(components != null)

				{

					components.Dispose();

				}

			}

			base.Dispose( disposing );

		}



		#region Windows Form Designer generated code

		/// <summary>

		/// Required method for Designer support - do not modify

		/// the contents of this method with the code editor.

		/// </summary>

		private void InitializeComponent()

		{

            this.PhotoPreview = new System.Windows.Forms.PictureBox();

            this.PhotoList = new System.Windows.Forms.ListView();

            this.PhotoInspector = new System.Windows.Forms.PropertyGrid();

            this.label1 = new System.Windows.Forms.Label();

            this.label2 = new System.Windows.Forms.Label();

            this.DownloadPhoto = new System.Windows.Forms.Button();

            this.UploadPhoto = new System.Windows.Forms.Button();

            this.folderBrowserDialog = new System.Windows.Forms.FolderBrowserDialog();

            this.openFileDialog = new System.Windows.Forms.OpenFileDialog();

            this.progressBar = new System.Windows.Forms.ProgressBar();

            this.FileInfo = new System.Windows.Forms.Label();

            this.CancelAsync = new System.Windows.Forms.Button();

            ((System.ComponentModel.ISupportInitialize)(this.PhotoPreview)).BeginInit();

            this.SuspendLayout();

            // 

            // PhotoPreview

            // 

            this.PhotoPreview.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;

            this.PhotoPreview.Location = new System.Drawing.Point(240, 64);

            this.PhotoPreview.Name = "PhotoPreview";

            this.PhotoPreview.Size = new System.Drawing.Size(280, 216);

            this.PhotoPreview.TabIndex = 1;

            this.PhotoPreview.TabStop = false;

            // 

            // PhotoList

            // 

            this.PhotoList.Alignment = System.Windows.Forms.ListViewAlignment.Default;

            this.PhotoList.FullRowSelect = true;

            this.PhotoList.GridLines = true;

            this.PhotoList.HeaderStyle = System.Windows.Forms.ColumnHeaderStyle.Nonclickable;

            this.PhotoList.LabelWrap = false;

            this.PhotoList.Location = new System.Drawing.Point(24, 64);

            this.PhotoList.MultiSelect = false;

            this.PhotoList.Name = "PhotoList";

            this.PhotoList.ShowGroups = false;

            this.PhotoList.Size = new System.Drawing.Size(210, 216);

            this.PhotoList.Sorting = System.Windows.Forms.SortOrder.Ascending;

            this.PhotoList.TabIndex = 0;

            this.PhotoList.UseCompatibleStateImageBehavior = false;

            this.PhotoList.View = System.Windows.Forms.View.List;

            this.PhotoList.SelectedIndexChanged += new System.EventHandler(this.PhotoList_SelectedIndexChanged);

            // 

            // PhotoInspector

            // 

            this.PhotoInspector.LineColor = System.Drawing.SystemColors.ScrollBar;

            this.PhotoInspector.Location = new System.Drawing.Point(24, 296);

            this.PhotoInspector.Name = "PhotoInspector";

            this.PhotoInspector.Size = new System.Drawing.Size(496, 192);

            this.PhotoInspector.TabIndex = 2;

            // 

            // label1

            // 

            this.label1.Location = new System.Drawing.Point(24, 16);

            this.label1.Name = "label1";

            this.label1.Size = new System.Drawing.Size(176, 24);

            this.label1.TabIndex = 3;

            this.label1.Text = "List of photos:";

            // 

            // label2

            // 

            this.label2.Location = new System.Drawing.Point(240, 16);

            this.label2.Name = "label2";

            this.label2.Size = new System.Drawing.Size(120, 32);

            this.label2.TabIndex = 4;

            this.label2.Text = "Preview:";

            // 

            // DownloadPhoto

            // 

            this.DownloadPhoto.Enabled = false;

            this.DownloadPhoto.Location = new System.Drawing.Point(27, 575);

            this.DownloadPhoto.Name = "DownloadPhoto";

            this.DownloadPhoto.Size = new System.Drawing.Size(88, 40);

            this.DownloadPhoto.TabIndex = 5;

            this.DownloadPhoto.Text = "&Export Photo";

            this.DownloadPhoto.Click += new System.EventHandler(this.DownloadPhoto_Click);

            // 

            // UploadPhoto

            // 

            this.UploadPhoto.Enabled = false;

            this.UploadPhoto.Location = new System.Drawing.Point(131, 575);

            this.UploadPhoto.Name = "UploadPhoto";

            this.UploadPhoto.Size = new System.Drawing.Size(88, 40);

            this.UploadPhoto.TabIndex = 6;

            this.UploadPhoto.Text = "&Upload Photos";

            this.UploadPhoto.Click += new System.EventHandler(this.UploadPhoto_Click);

            // 

            // folderBrowserDialog

            // 

            this.folderBrowserDialog.RootFolder = System.Environment.SpecialFolder.MyPictures;

            // 

            // openFileDialog

            // 

            this.openFileDialog.Filter = "JPeg Files|*.jpg";

            this.openFileDialog.Multiselect = true;

            // 

            // progressBar

            // 

            this.progressBar.Location = new System.Drawing.Point(24, 551);

            this.progressBar.Name = "progressBar";

            this.progressBar.Size = new System.Drawing.Size(496, 18);

            this.progressBar.TabIndex = 7;

            // 

            // FileInfo

            // 

            this.FileInfo.Location = new System.Drawing.Point(24, 491);

            this.FileInfo.Name = "FileInfo";

            this.FileInfo.Size = new System.Drawing.Size(496, 57);

            this.FileInfo.TabIndex = 8;

            // 

            // CancelAsync

            // 

            this.CancelAsync.Enabled = false;

            this.CancelAsync.Location = new System.Drawing.Point(421, 575);

            this.CancelAsync.Name = "CancelAsync";

            this.CancelAsync.Size = new System.Drawing.Size(99, 40);

            this.CancelAsync.TabIndex = 9;

            this.CancelAsync.Text = "&Cancel";

            this.CancelAsync.UseVisualStyleBackColor = true;

            this.CancelAsync.Visible = false;

            this.CancelAsync.Click += new System.EventHandler(this.CancelAsync_Click);

            // 

            // PictureBrowser

            // 

            this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);

            this.ClientSize = new System.Drawing.Size(534, 627);

            this.Controls.Add(this.CancelAsync);

            this.Controls.Add(this.FileInfo);

            this.Controls.Add(this.progressBar);

            this.Controls.Add(this.UploadPhoto);

            this.Controls.Add(this.DownloadPhoto);

            this.Controls.Add(this.label2);

            this.Controls.Add(this.label1);

            this.Controls.Add(this.PhotoInspector);

            this.Controls.Add(this.PhotoList);

            this.Controls.Add(this.PhotoPreview);

            this.Name = "PictureBrowser";

            this.Text = "Waiting for data to load";

            this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.PictureBrowser_FormClosing);

            ((System.ComponentModel.ISupportInitialize)(this.PhotoPreview)).EndInit();

            this.ResumeLayout(false);



        }

		#endregion



        private void InitializeList(string title)

        {

            this.Text = title;



            if (this.photoFeed != null && this.photoFeed.Entries.Count > 0) 

            {

                foreach (PicasaEntry entry in this.photoFeed.Entries)

                {

                    ListViewItem item = new ListViewItem(entry.Title.Text);

                    item.Tag = entry;

                    this.PhotoList.Items.Add(item);

                }

                this.UploadPhoto.Enabled = true;

            }

        }



        private void PhotoList_SelectedIndexChanged(object sender, System.EventArgs e)

        {

            if (this.PhotoList.SelectedItems.Count == 1)

            {

                foreach (ListViewItem item in this.PhotoList.SelectedItems) 

                {

                    PicasaEntry entry = item.Tag as PicasaEntry;

                    setSelection(entry);

                }

            } 

            else 

            {

                setSelection(null);

            }

        }

       

        private void setSelection(PicasaEntry entry)

        {

            if (entry != null) 

            {

                this.Cursor = Cursors.WaitCursor;

                try

                {

                    Stream stream = this.picasaService.Query(new Uri(findLargestThumbnail(entry.Media.Thumbnails)));

                    this.PhotoPreview.Image = new Bitmap(stream);

                }

                catch

                {

                    Icon error = new Icon(SystemIcons.Exclamation, 40, 40);

                    this.PhotoPreview.Image = error.ToBitmap();

                }

                Photo photo = new Photo();

                photo.AtomEntry = entry;

                this.PhotoInspector.SelectedObject = photo;

                this.Cursor = Cursors.Default;

                this.DownloadPhoto.Enabled = true;

            }

            else 

            {

                this.PhotoPreview.Image = null;

                this.PhotoInspector.SelectedObject = null;

                this.DownloadPhoto.Enabled = false;

            }

        }



        private string findLargestThumbnail(ExtensionCollection<MediaThumbnail> collection)

        {

            MediaThumbnail largest = null;

            int width = 0; 

            foreach (MediaThumbnail thumb in collection) 

            {

                int iWidth = int.Parse(thumb.Attributes["width"] as string);

                if (iWidth > width) 

                {

                    largest = thumb;

                }

            }

            return largest.Attributes["url"] as string;

        }



        private void DownloadPhoto_Click(object sender, System.EventArgs e)

        {

            // Show the FolderBrowserDialog.

            DialogResult result = folderBrowserDialog.ShowDialog();

        

            if( result == DialogResult.OK )

            {

                string folderName = folderBrowserDialog.SelectedPath;

                int i=1;

                foreach (ListViewItem item in this.PhotoList.SelectedItems) 

                {

                    string filename = folderName + "\\image" + i.ToString() + ".jpg";

                    i++;

                    PicasaEntry entry = item.Tag as PicasaEntry;

                    this.DoSaveImageFile(entry, filename);

                }

            }

        }









        public void BackupAlbum(string albumUri, string foldername)

        {



            UserState us = new UserState();



            us.opType = UserState.OperationType.queryForBackup;

            us.filename = "Starting backup to : " + foldername;

            us.foldername = foldername;

            this.states.Add(us);



            this.picasaService.QueryFeedAync(new Uri(albumUri), DateTime.MinValue, us);





        }





        public void DoSaveImageFile(PicasaEntry entry, string filename)

        {

            if (entry.Media != null &&

                entry.Media.Content != null)

            {

                UserState ut = new UserState();

                ut.opType = UserState.OperationType.download;

                ut.filename = filename;

                this.states.Add(ut);



                this.picasaService.QueryStreamAync(new Uri(entry.Media.Content.Attributes["url"] as string), DateTime.MinValue, ut);

            }

        }



        private void UploadPhoto_Click(object sender, System.EventArgs e)

        {

            DialogResult result = openFileDialog.ShowDialog();

 

            if( result == DialogResult.OK )

            {

                string[] files = openFileDialog.FileNames;

                // Open each file and display the image in PictureBox1.

                // Call Application.DoEvents to force a repaint after each

                // file is read.        

                foreach (string file in files )

                {

                    System.IO.FileInfo fileInfo = new System.IO.FileInfo(file);

                    System.IO.FileStream fileStream = fileInfo.OpenRead();



                    this.FileInfo.Text = "Starting upload....";

                    PicasaEntry entry = new PhotoEntry();



                    UserState ut = new UserState();

                    ut.opType = UserState.OperationType.upload;

                    this.states.Add(ut);

                    entry.MediaSource = new Google.GData.Client.MediaFileSource(fileStream, file, "image/jpeg");

                    this.picasaService.InsertAsync(new Uri(this.photoFeed.Post), entry, ut);

                }

            }

        }



        private void OnProgress(object sender, AsyncOperationProgressEventArgs e)

        {

            this.CancelAsync.Enabled = true;

            this.CancelAsync.Visible = true;



            if (this.states.Contains(e.UserState as UserState) == true)

            {

                this.progressBar.Value = e.ProgressPercentage ;

            }

        }





        private void OnDone(object sender, AsyncOperationCompletedEventArgs e)

        {

            UserState ut = e.UserState as UserState;



            if (this.states.Contains(ut) == false)

                return;



            this.states.Remove(ut);

        

            if (e.Error == null && e.Cancelled == false)

            {



                if (ut.opType == UserState.OperationType.query ||

                    ut.opType == UserState.OperationType.queryForBackup)

                {

                    if (e.Feed != null)

                    {

                        this.photoFeed = e.Feed as PicasaFeed;

                        this.InitializeList(ut.filename);

                    }

                }



                if (ut.opType == UserState.OperationType.upload)

                {

                    if (e.Entry != null)

                    {

                        ListViewItem item = new ListViewItem(e.Entry.Title.Text);

                        item.Tag = e.Entry;

                        this.PhotoList.Items.Add(item);

                        this.FileInfo.Text = "Upload succeeded";

                    }

                }

                if (ut.opType == UserState.OperationType.download ||

                    ut.opType == UserState.OperationType.downloadList)

                {

                    if (e.ResponseStream != null)

                    {

                        WriteFile(ut.filename, e.ResponseStream);

                        this.FileInfo.Text = "Saved file: " + ut.filename;

                    }

                }

                if (ut.opType == UserState.OperationType.downloadList)

                {

                    // we need to create a new object for uniqueness



                    UserState u = new UserState();

                    u.counter = ut.counter + 1;

                    u.feed = ut.feed;

                    u.foldername = ut.foldername;

                    u.opType = UserState.OperationType.downloadList;

                    

                    if (u.feed.Entries.Count > 0)

                    {

                        u.feed.Entries.RemoveAt(0);

                        this.PhotoList.Items.RemoveAt(0);



                    }

                    this.states.Add(u);

                    SaveAnotherPictureDelegate d = new SaveAnotherPictureDelegate(this.CreateAnotherSaveFile);



                    this.BeginInvoke(d, u);



                }

                if (ut.opType == UserState.OperationType.queryForBackup)

                {

                    UserState u = new UserState();

                    u.opType = UserState.OperationType.downloadList;

                    u.feed = this.photoFeed;

                    u.counter = 1;

                    u.foldername = ut.foldername;

                    u.filename = ut.foldername + "\\image1.jpg";

                    this.states.Add(u);

                    SaveAnotherPictureDelegate d = new SaveAnotherPictureDelegate(this.CreateAnotherSaveFile);

                    this.BeginInvoke(d, u);

                }

            }

            this.progressBar.Value = 0;



            if (this.states.Count == 0)

            {

                this.CancelAsync.Enabled = false;

                this.CancelAsync.Visible = false;

            }



        }



        private void CreateAnotherSaveFile(UserState us)

        {

            if (us.feed.Entries.Count > 0)

            {

                PicasaEntry p = us.feed.Entries[0] as PicasaEntry;

                us.filename = us.foldername + "\\image" + us.counter.ToString() + ".jpg";

                this.picasaService.QueryStreamAync(new Uri(p.Media.Content.Attributes["url"] as string), DateTime.MinValue, us);

            }

            else if (us.feed.Entries.Count == 0 && us.feed.NextChunk != null)

            {

            }

            else

            {

                this.Close();

            }

        }



        private void WriteFile(string filename, Stream input)

        {

            FileStream fs = new FileStream(filename, FileMode.OpenOrCreate);

            BinaryWriter w = new BinaryWriter(fs);

            byte[] buffer = new byte[4096];

            int iRead = 0;

            int iOffset = 0;

            while ((iRead = input.Read(buffer, 0, 4069)) > 0)

            {

                w.Write(buffer, 0, iRead);

                iOffset += iRead;

            }

            w.Close();

            fs.Close();

        }



        private void PictureBrowser_FormClosing(object sender, FormClosingEventArgs e)

        {

            // here we should cancel our async events

            foreach (object o in this.states)

            {

                this.picasaService.CancelAsync(o);

            }



        }



        private void CancelAsync_Click(object sender, EventArgs e)

        {

            // here we should cancel our async events

            foreach (object o in this.states)

            {

                this.picasaService.CancelAsync(o);

            }



            this.FileInfo.Text = "Operation was cancelled";



        }

	}



    public class UserState

    {

        public enum OperationType

        {

            upload,

            download,

            downloadList,

            query,

            queryForBackup

        }



        public string filename;

        public OperationType opType;

        public PicasaFeed feed;

        public int counter = 0; 

        public string foldername;



    }



}