using System;
using System.Collections.Specialized;
using System.Drawing;
using System.Windows.Forms;

// The 'text' parameter will contain the text from the:
//   - Current Clipboard when run by HotKey
//   - History Item when run from the History Menu
// The returned string will be:
//   - Placed directly on the Clipboard
//   - Ignored by ClipboardFusion if it is 'null'
public static class ClipboardFusionHelper
{
	public static string ProcessText(string text)
	{
        //create a new ContextMenuStrip to show the items
		using(ContextMenuStrip menu = new ContextMenuStrip())
		{
            //dont show the padding on the left of the menu
			menu.ShowCheckMargin = false;
			menu.ShowImageMargin = false;
			
			//set the font so it isn't huge
			menu.Font = new Font(menu.Font.FontFamily, 8, FontStyle.Regular);
			
			//loop through the first 25 history items
			for(int i = 0; (i < BFS.ClipboardFusion.GetHistoryItemCount()) && (i < 25); i++)
			{
                //get the history item data
                text = BFS.ClipboardFusion.GetHistoryText(i);
                Bitmap image = BFS.ClipboardFusion.GetHistoryImage(i);
                string[] fileList = BFS.ClipboardFusion.GetHistoryFileList(i);
                
                //strip the newline characters out of the text for the title, and limit it to 50 characters
                string title = string.IsNullOrEmpty(text) ? "[Empty]" : text;
                title = title.Replace(Environment.NewLine, "\n").Replace("\r", "\n").Replace("\n", "");
                if(title.Length > 50)
                    title = title.Substring(0, 50);
                
                //make the context menu item
                ToolStripMenuItem item = new ToolStripMenuItem(title);
                
                //if the item contains an image, set the background image to the item
                if(image != null)
                {
                    item.BackgroundImage = image;
                    item.BackgroundImageLayout = ImageLayout.Stretch;
                }
                
                //make the ClipboardData object
                ClipboardData data = new ClipboardData(text, image, fileList);	
                
                //set the click event, set the ClipboardData to the tag, and add the item to the menu
                item.Click += ItemClick;
                item.Tag = data;
                menu.Items.Add(item);
			}
            
            //add an item that you can click to close the menu
            menu.Items.Add("Close");
            menu.Items[menu.Items.Count - 1].ForeColor = Color.Red;
            
			//show the menu
            menu.Show(BFS.Input.GetMousePositionX(), BFS.Input.GetMousePositionY());

            //wait for the menu to close
			while(menu.Visible)
				Application.DoEvents();
				
            //dispose the objects
            foreach(ToolStripMenuItem item in menu.Items)
            {
                ClipboardData data = item.Tag as ClipboardData;
                if(data != null)
                    data.Dispose();
                    
                item.Dispose();
            }
		}
		
		return null;
	}
	
	//this function will be called when you click on a regular menu item
	private static void ItemClick(object sender, EventArgs e)
	{
        try
        {
            //get the menu item object
            ToolStripMenuItem item = sender as ToolStripMenuItem;
            if(item == null)
                throw new Exception("ToolStripMenuItem is NULL");
             
            //get the ClipboardData object
            ClipboardData data = item.Tag as ClipboardData;
            if(data == null)
                throw new Exception("ClipboardData is NULL");
            
            //depending on what data we have, set the clipboard
            if(data.Image != null)
            {
                Clipboard.SetImage(data.Image);
                BFS.Clipboard.Paste();
            }
            else if(data.FileList.Length > 0)
            {
                StringCollection collection = new StringCollection();
                collection.AddRange(data.FileList);
                Clipboard.SetFileDropList(collection);
                BFS.Clipboard.Paste();
            }
            else
            {            
                BFS.Clipboard.PasteText(data.Text);
            }
        }
        catch(Exception ex)
        {
            //if something happened, show an error
            BFS.Dialog.ShowMessageError(ex.Message);
        }
	}
	
	//this is an object that will store the Clipboard History Item data
	private class ClipboardData : IDisposable
	{
        public string Text;
        public Bitmap Image;
        public string[] FileList;
        
        public ClipboardData(string text, Bitmap image, string[] fileList)
        {
            this.Text = text;
            this.Image = image;
            this.FileList = fileList;
        }
        
        public void Dispose()
        {
            if(this.Image != null)
                this.Image.Dispose();
        }
	}
}