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

namespace WorldOfPeacecraft
{
	public class ChatOutputBox : RichTextBox
	{
		private IBackend Backend;
		private Font MessageFont;
		private Font SenderFont;
		private Font IregularSenderFont;

		public ChatOutputBox (IBackend backend)
		{
			Backend = backend;
			this.ReadOnly = true;
			this.Multiline = true;
			MessageFont = this.SelectionFont;
			SenderFont = new Font (MessageFont, FontStyle.Bold);
			IregularSenderFont = new Font (MessageFont, FontStyle.Bold | FontStyle.Italic);
		}

		public void UpdateData ()
		{
			this.SuspendLayout ();
			this.Clear ();
			IEnumerable<IChatMessage> chatMessages = Backend.GetChatMessages ();
			bool firstline = true;
			lock (Backend) {
				foreach (IChatMessage message in chatMessages) {
					if (firstline) {
						firstline = false;
					} else {
						this.AppendText ("\n");
					}
					if (message.IsSenderPlayer ()) {
						this.SelectionFont = SenderFont;
					} else {
						this.SelectionFont = IregularSenderFont;
					}
					this.AppendText (message.GetSender ());
					this.AppendText (": ");
					this.SelectionFont = MessageFont;
					this.AppendText (message.GetMessage ());
				}
			}
			this.ResumeLayout ();
		}
	}
}