using System;
using System.IO;

using Tomboy;

public class TagNotePlugin : NotePlugin
{
	private Gtk.Label tagLabel;
	
	static TagNotePlugin ()
	{
	}
	
	protected override void Initialize ()
	{
		Gtk.MenuItem item = new Gtk.MenuItem ("Tag note");
		item.Activated += TagButtonClicked;
		item.Show ();
		AddPluginMenuItem (item);
                Note.Manager.NoteDeleted += OnNoteDeleted;
	}
	
	protected override void Shutdown ()
	{
	}
	
	protected override void OnNoteOpened ()
	{
		InsertIntoToolbar (this.Note.Window);
	}
	
	protected void OnNoteDeleted (object sender, Note deleted)
	{
		if (deleted.Equals(Note))
			RemoveTags(Note.Uri);
	}
	
	Gtk.Label TagLabel
	{
		get { return this.tagLabel; }
	}
	
	void TagButtonClicked (object sender, EventArgs args)
	{
		ShowDialog ();
	}
        
	private void ShowDialog ()
	{
                LeaftagGtk.TagDialog tagDialog = new LeaftagGtk.TagDialog ();
                tagDialog.Modal = false;
                tagDialog.Uris = new string[] { this.Note.Uri };
                tagDialog.Run ();
                tagDialog.Destroy ();
		UpdateTagLabelText (TagLabel);
	}
	
	private void InsertIntoToolbar (NoteWindow window)
	{
		Gtk.Toolbar toolbar = window.Toolbar;
		this.tagLabel = CreateTagLabel ();
		UpdateTagLabelText (TagLabel);
		toolbar.AppendSpace ();
		toolbar.AppendElement
			(Gtk.ToolbarChildType.Widget, TagLabel,
			 null, null, null, null, null);
		Gtk.Button editTagsButton = new Gtk.Button ("Edit");
		editTagsButton.Clicked += EditClicked;
		editTagsButton.Show ();
		toolbar.AppendWidget (editTagsButton, "Edit tags", null);
	}
	
	private void UpdateTagLabelText (Gtk.Label label)
	{
		label.Text = ReadTags (this.Note.Uri);
	}
	
	private Gtk.Label CreateTagLabel ()
	{
		Gtk.Label tagLabel = new Gtk.Label ();
		tagLabel.Ellipsize = Pango.EllipsizeMode.End;
		tagLabel.Xpad = 6;
		tagLabel.Show ();
		tagLabel.WidthChars = 8;
		return tagLabel;
	}
	
	private void EditClicked (object sender, EventArgs args)
	{
		ShowDialog ();
	}

	/* can't be used with the old-style toolbar api used by tomboy */
	/*
	private void NewStyleInsert (Gtk.Toolbar toolbar)
	{
		toolbar.Insert (new Gtk.SeparatorToolItem (), -1);
		toolbar.Insert (CreateTagLabelToolItem (), -1);
		toolbar.Insert (CreateTagEditToolButton (), -1);
	}
	
	private Gtk.ToolItem CreateTagLabelToolItem ()
	{
		Gtk.ToolItem item = new Gtk.ToolItem ();
		item.Child = CreateTagLabel ();
		return item;
	}

	
	private Gtk.ToolItem CreateTagEditToolButton ()
	{
		Gtk.ToolButton button = new Gtk.ToolButton (null, "Edit");
		button.Clicked += EditClicked;
		return button;
	}
	*/
		
	private string ReadTags (string uri)
	{
		Leaftag.LtSource source = Leaftag.LtSource.Lookup (uri);
		if (source == null)
			return "";
		Leaftag.LtTag[] tags = source.Tags;
		if (tags != null) {
			string[] tagNames = new string[tags.Length];
			for (int i = 0; i < tags.Length; i++) {
				tagNames [i] = tags [i].Name;
			}
			return string.Join(", ", tagNames);
		} else {
			return "";
		}
	}
	
	private void RemoveTags (string uri)
	{
		Leaftag.LtSource source = Leaftag.LtSource.Lookup (uri);
		if (source == null)
			return;
		source.Delete ();
	}
}