using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
using System.Text;
using System.Drawing.Imaging;

public static class ClipboardFusionHelper
{
	public static string ProcessText(string text)
	{
		//open the custom form
		using(ClipboardHistorySelectForm dialog = new ClipboardHistorySelectForm())
            dialog.ShowDialog();
			
        return null;		
	}
	
	//this form will display a multi-select list with all the clipboard history items
	private class ClipboardHistorySelectForm : Form
	{
		//the form's controls
		private ListView lvClipboardHistory;
		private Button btnExport;
		private Button btnCancel;
		private Button btnSelectAll;
		
		//the constrcutor will build the form and the controls
		public ClipboardHistorySelectForm()
		{
			this.lvClipboardHistory = new ListView();
			this.btnExport = new Button();
			this.btnCancel = new Button();
			this.btnSelectAll = new Button();
			
			this.SuspendLayout();
			
			//add a column to the list so we get a vertical scroll bar
			ColumnHeader column = new ColumnHeader();
			column.Width = 288;
			
			//set up the listview
			this.lvClipboardHistory.Location = new Point(16, 16);
			this.lvClipboardHistory.Size = new Size(312, 392);
			this.lvClipboardHistory.View = View.Details;
			this.lvClipboardHistory.HeaderStyle = ColumnHeaderStyle.None;
			this.lvClipboardHistory.Columns.Add(column);
			this.lvClipboardHistory.FullRowSelect = true;
			
			//set up the select all button
			this.btnSelectAll.Location = new System.Drawing.Point(8, 416);
			this.btnSelectAll.Size = new System.Drawing.Size(80, 24);
			this.btnSelectAll.Text = "Select All";
			
			//set up the export button
			this.btnExport.Location = new System.Drawing.Point(160, 416);
			this.btnExport.Size = new System.Drawing.Size(80, 24);
			this.btnExport.Text = "Export";

			//set up the cancel button
			this.btnCancel.Location = new System.Drawing.Point(248, 416);
			this.btnCancel.Size = new System.Drawing.Size(80, 24);
			this.btnCancel.Text = "Cancel";
			
			//set up the form
			this.AcceptButton = this.btnExport;
			this.CancelButton = this.btnCancel;
			this.ClientSize = new Size(344, 456);
			this.Controls.Add(this.btnSelectAll);
			this.Controls.Add(this.btnCancel);
			this.Controls.Add(this.btnExport);
			this.Controls.Add(this.lvClipboardHistory);
			this.Text = "Online Pinned";
			
			this.ResumeLayout(false);
			
			//set up the events
			this.btnCancel.Click += this.btnCancel_Click;
			this.btnExport.Click += this.btnExport_Click;
			this.btnSelectAll.Click += this.btnSelectAll_Click;
			this.Load += this.Form_Load;
		}
		
		//when the form loads, fill the listview with the items from the clipboard history
		private void Form_Load(object sender, EventArgs e)
		{
			this.lvClipboardHistory.Items.Clear();
			foreach(string text in BFS.ClipboardFusion.CFOGetAllPinnedText())
			{
                HistoryListViewItem item = new HistoryListViewItem();
                item.HasText = true;
                item.HasImage = false;
                item.HistoryText = text;               
                item.Text = item.HistoryText;
                if(item.Text.Length > 50)
                    item.Text = item.Text.Substring(0, 50);
                
                if((string.IsNullOrEmpty(item.Text)) && (item.HasImage))
                    item.Text = "[Image]";
                
				this.lvClipboardHistory.Items.Add(item);
            }
		}
		
		//this function gets called when the Export button is clicked
		private void btnExport_Click(object sender, EventArgs e)
		{
			string baseFolder = "";
			using(FolderBrowserDialog dialog = new FolderBrowserDialog())
			{
				dialog.Description = "Save Items to Selected Folder";
				if(dialog.ShowDialog(this) != DialogResult.OK)
					return;
				
				baseFolder = dialog.SelectedPath;
			}
			
			//add the selected clipboard history items to the list
			for(int i = 0; i < this.lvClipboardHistory.SelectedItems.Count; i++)
			{
                HistoryListViewItem historyItem = this.lvClipboardHistory.SelectedItems[i] as HistoryListViewItem;
                if(historyItem == null)
                    continue;
			
                if(historyItem.HasText)
                {
					string filename = Path.Combine(baseFolder, $"text{i+1}.txt");
                    using(FileStream file = File.Open(filename, FileMode.OpenOrCreate, FileAccess.Write))
                    using(StreamWriter writer = new StreamWriter(file, Encoding.Unicode))
                        writer.Write(historyItem.HistoryText);
                }
                
                if(historyItem.HasImage)
                {                    
					string filename = Path.Combine(baseFolder, $"image{i+1}.png");                        
                    historyItem.HistoryImage.Save(filename, ImageFormat.Png);                    
                }
			}
				
			//set the dialog result and close the form
			this.DialogResult = DialogResult.OK;
			this.Close();
		}
		
		private void btnSelectAll_Click(object sender, EventArgs e)
		{
			// select all the items
			foreach(ListViewItem item in this.lvClipboardHistory.Items)			
				item.Selected = true;
		}
		
		private void btnCancel_Click(object sender, EventArgs e)
		{			
			//set the dialog result and close the form
			this.DialogResult = DialogResult.Cancel;
			this.Close();
		}
	}
	
	private class HistoryListViewItem : ListViewItem
	{
        public bool HasImage { get; set; }
        public bool HasText { get; set; }
        public string HistoryText { get; set; }
        public Bitmap HistoryImage { get; set; }
	}
}