/***************************************************************************
 *                                 Gump.cs
 *                            -------------------
 *   begin                : May 1, 2002
 *   copyright            : (C) The RunUO Software Team
 *   email                : info@runuo.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 ***************************************************************************/

using System;
using System.Collections.Generic;
using System.Text;
using Server.Network;

namespace Server.Gumps
{
  public class Gump
  {
    private static uint m_NextSerial = 1;

    private static byte[] m_BeginLayout = StringToBuffer("{ ");
    private static byte[] m_EndLayout = StringToBuffer(" }");

    private static byte[] m_NoMove = StringToBuffer("{ nomove }");
    private static byte[] m_NoClose = StringToBuffer("{ noclose }");
    private static byte[] m_NoDispose = StringToBuffer("{ nodispose }");
    private static byte[] m_NoResize = StringToBuffer("{ noresize }");
    private bool m_Closable = true;
    private bool m_Disposable = true;

    private bool m_Draggable = true;
    private bool m_Resizable = true;

    private uint m_Serial;
    private List<string> m_Strings;

    internal int m_TextEntries, m_Switches;
    private int m_X, m_Y;

    public Gump(int x, int y)
    {
      do
      {
        m_Serial = m_NextSerial++;
      } while (m_Serial == 0); // standard client apparently doesn't send a gump response packet if serial == 0

      m_X = x;
      m_Y = y;

      TypeID = GetTypeID(GetType());

      Entries = new List<GumpEntry>();
      m_Strings = new List<string>();
    }

    public int TypeID{ get; }

    public List<GumpEntry> Entries{ get; }

    public uint Serial
    {
      get => m_Serial;
      set
      {
        if (m_Serial != value)
        {
          m_Serial = value;
          Invalidate();
        }
      }
    }

    public int X
    {
      get => m_X;
      set
      {
        if (m_X != value)
        {
          m_X = value;
          Invalidate();
        }
      }
    }

    public int Y
    {
      get => m_Y;
      set
      {
        if (m_Y != value)
        {
          m_Y = value;
          Invalidate();
        }
      }
    }

    public bool Disposable
    {
      get => m_Disposable;
      set
      {
        if (m_Disposable != value)
        {
          m_Disposable = value;
          Invalidate();
        }
      }
    }

    public bool Resizable
    {
      get => m_Resizable;
      set
      {
        if (m_Resizable != value)
        {
          m_Resizable = value;
          Invalidate();
        }
      }
    }

    public bool Draggable
    {
      get => m_Draggable;
      set
      {
        if (m_Draggable != value)
        {
          m_Draggable = value;
          Invalidate();
        }
      }
    }

    public bool Closable
    {
      get => m_Closable;
      set
      {
        if (m_Closable != value)
        {
          m_Closable = value;
          Invalidate();
        }
      }
    }

    public static int GetTypeID(Type type)
    {
      return type?.FullName?.GetHashCode() ?? -1;
    }

    public void Invalidate()
    {
      //if ( m_Strings.Count > 0 )
      //	m_Strings.Clear();
    }

    public void AddPage(int page)
    {
      Add(new GumpPage(page));
    }

    public void AddAlphaRegion(int x, int y, int width, int height)
    {
      Add(new GumpAlphaRegion(x, y, width, height));
    }

    public void AddBackground(int x, int y, int width, int height, int gumpID)
    {
      Add(new GumpBackground(x, y, width, height, gumpID));
    }

    public void AddButton(int x, int y, int normalID, int pressedID, int buttonID,
      GumpButtonType type = GumpButtonType.Reply, int param = 0)
    {
      Add(new GumpButton(x, y, normalID, pressedID, buttonID, type, param));
    }

    public void AddCheck(int x, int y, int inactiveID, int activeID, bool initialState, int switchID)
    {
      Add(new GumpCheck(x, y, inactiveID, activeID, initialState, switchID));
    }

    public void AddGroup(int group)
    {
      Add(new GumpGroup(group));
    }

    public void AddTooltip(int number)
    {
      Add(new GumpTooltip(number));
    }

    public void AddHtml(int x, int y, int width, int height, string text, bool background = false, bool scrollbar = false)
    {
      Add(new GumpHtml(x, y, width, height, text, background, scrollbar));
    }

    public void AddHtmlLocalized(int x, int y, int width, int height, int number, bool background = false, bool scrollbar = false)
    {
      Add(new GumpHtmlLocalized(x, y, width, height, number, background, scrollbar));
    }

    public void AddHtmlLocalized(int x, int y, int width, int height, int number, int color, bool background = false,
      bool scrollbar = false)
    {
      Add(new GumpHtmlLocalized(x, y, width, height, number, color, background, scrollbar));
    }

    public void AddHtmlLocalized(int x, int y, int width, int height, int number, string args, int color,
      bool background = false, bool scrollbar = false)
    {
      Add(new GumpHtmlLocalized(x, y, width, height, number, args, color, background, scrollbar));
    }

    public void AddImage(int x, int y, int gumpID, int hue = 0)
    {
      Add(new GumpImage(x, y, gumpID, hue));
    }

    public void AddImageTiled(int x, int y, int width, int height, int gumpID)
    {
      Add(new GumpImageTiled(x, y, width, height, gumpID));
    }

    public void AddImageTiledButton(int x, int y, int normalID, int pressedID, int buttonID, GumpButtonType type,
      int param, int itemID, int hue, int width, int height, int localizedTooltip = -1)
    {
      Add(new GumpImageTileButton(x, y, normalID, pressedID, buttonID, type, param, itemID, hue, width, height,
        localizedTooltip));
    }

    public void AddItem(int x, int y, int itemID, int hue = 0)
    {
      Add(new GumpItem(x, y, itemID, hue));
    }

    public void AddLabel(int x, int y, int hue, string text)
    {
      Add(new GumpLabel(x, y, hue, text));
    }

    public void AddLabelCropped(int x, int y, int width, int height, int hue, string text)
    {
      Add(new GumpLabelCropped(x, y, width, height, hue, text));
    }

    public void AddRadio(int x, int y, int inactiveID, int activeID, bool initialState, int switchID)
    {
      Add(new GumpRadio(x, y, inactiveID, activeID, initialState, switchID));
    }

    public void AddTextEntry(int x, int y, int width, int height, int hue, int entryID, string initialText, int size = 0)
    {
      Add(new GumpTextEntryLimited(x, y, width, height, hue, entryID, initialText, size));
    }

    public void AddItemProperty(uint serial)
    {
      Add(new GumpItemProperty(serial));
    }

    public void Add(GumpEntry g)
    {
      if (g.Parent != this)
      {
        g.Parent = this;
      }
      else if (!Entries.Contains(g))
      {
        Invalidate();
        Entries.Add(g);
      }
    }

    public void Remove(GumpEntry g)
    {
      if (g == null || !Entries.Contains(g))
        return;

      Invalidate();
      Entries.Remove(g);
      g.Parent = null;
    }

    public int Intern(string value)
    {
      int indexOf = m_Strings.IndexOf(value);

      if (indexOf >= 0) return indexOf;

      Invalidate();
      m_Strings.Add(value);
      return m_Strings.Count - 1;
    }

    public void SendTo(NetState state)
    {
      state.AddGump(this);
      state.Send(Compile(state));
    }

    public static byte[] StringToBuffer(string str)
    {
      return Encoding.ASCII.GetBytes(str);
    }

    private Packet Compile(NetState ns = null)
    {
      IGumpWriter disp;

      if (ns?.Unpack == true)
        disp = new DisplayGumpPacked(this);
      else
        disp = new DisplayGumpFast(this);

      if (!m_Draggable)
        disp.AppendLayout(m_NoMove);

      if (!m_Closable)
        disp.AppendLayout(m_NoClose);

      if (!m_Disposable)
        disp.AppendLayout(m_NoDispose);

      if (!m_Resizable)
        disp.AppendLayout(m_NoResize);

      int count = Entries.Count;

      for (int i = 0; i < count; ++i)
      {
        GumpEntry e = Entries[i];

        disp.AppendLayout(m_BeginLayout);
        e.AppendTo(ns, disp);
        disp.AppendLayout(m_EndLayout);
      }

      disp.WriteStrings(m_Strings);

      disp.Flush();

      m_TextEntries = disp.TextEntries;
      m_Switches = disp.Switches;

      return (Packet)disp;
    }

    public virtual void OnResponse(NetState sender, RelayInfo info)
    {
    }

    public virtual void OnServerClose(NetState owner)
    {
    }
  }
}