using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Threading;

using UnityEngine;

namespace AllocsFixes.NetConnections.Servers.Web.Handlers
{
	public class ItemIconHandler : PathHandler
	{
		private string staticPart;
		private bool logMissingFiles;
		private Dictionary<string, byte[]> icons = new Dictionary<string, byte[]> ();
		private bool loaded = false;

		public ItemIconHandler (string staticPart, bool logMissingFiles, string moduleName = null) : base(moduleName) {
			this.staticPart = staticPart;
			this.logMissingFiles = logMissingFiles;
		}

		public override void HandleRequest (HttpListenerRequest req, HttpListenerResponse resp, WebConnection user, int permissionLevel) {
			if (!loaded) {
				if (!LoadIcons ()) {
					resp.StatusCode = (int)HttpStatusCode.NotFound;
					Log.Out ("Web:IconHandler: Could not load icons");
					return;
				}
			}

			string fn = req.Url.AbsolutePath.Remove (0, staticPart.Length);
			fn = fn.Remove (fn.LastIndexOf ('.'));

			if (icons.ContainsKey (fn)) {
				resp.ContentType = MimeType.GetMimeType (".png");
				resp.ContentLength64 = icons [fn].Length;
				resp.OutputStream.Write (icons [fn], 0, icons [fn].Length);
			} else {
				resp.StatusCode = (int)HttpStatusCode.NotFound;
				if (logMissingFiles)
					Log.Out ("Web:IconHandler:FileNotFound: \"" + req.Url.AbsolutePath + "\" ");
				return;
			}
		}

		private bool LoadIcons () {
			lock (icons) {
				if (loaded) {
					return true;
				}

				GameObject atlasObj = GameObject.Find ("/NGUI Root (2D)/ItemIconAtlas");
				if (atlasObj == null) {
					Log.Error ("Web:IconHandler: Atlas object not found");
					loaded = true;
					return false;
				}
				DynamicUIAtlas atlas = atlasObj.GetComponent<DynamicUIAtlas> ();
				if (atlas == null) {
					Log.Error ("Web:IconHandler: Atlas component not found");
					loaded = true;
					return false;
				}

				Texture2D atlasTex = atlas.texture as Texture2D;

				foreach (UISpriteData data in atlas.spriteList) {
					string name = data.name;
					Texture2D tex = new Texture2D (data.width, data.height, TextureFormat.ARGB32, false);
					tex.SetPixels (atlasTex.GetPixels (data.x, atlasTex.height - data.height - data.y, data.width, data.height));
					byte[] pixData = tex.EncodeToPNG ();

					icons.Add (name, pixData);
					UnityEngine.Object.Destroy (tex);
				}

				loaded = true;
				Log.Out ("Web:IconHandler: Icons loaded");

				return true;
			}
		}
	}
}