namespace Server.Gumps
{
  public abstract class BaseGridGump : Gump
  {
    public const int ArrowLeftID1 = 0x15E3;
    public const int ArrowLeftID2 = 0x15E7;
    public const int ArrowLeftWidth = 16;
    public const int ArrowLeftHeight = 16;

    public const int ArrowRightID1 = 0x15E1;
    public const int ArrowRightID2 = 0x15E5;
    public const int ArrowRightWidth = 16;
    public const int ArrowRightHeight = 16;
    protected GumpBackground m_Background;
    protected GumpImageTiled m_Offset;

    public BaseGridGump(int x, int y) : base(x, y)
    {
    }

    public int CurrentPage { get; private set; }

    public int CurrentX { get; private set; }

    public int CurrentY { get; private set; }

    public virtual int BorderSize => 10;
    public virtual int OffsetSize => 1;

    public virtual int EntryHeight => 20;

    public virtual int OffsetGumpID => 0x0A40;
    public virtual int HeaderGumpID => 0x0E14;
    public virtual int EntryGumpID => 0x0BBC;
    public virtual int BackGumpID => 0x13BE;

    public virtual int TextHue => 0;
    public virtual int TextOffsetX => 2;

    public string Center(string text) => $"<CENTER>{text}</CENTER>";

    public string Color(string text, int color) => $"<BASEFONT COLOR=#{color:X6}>{text}</BASEFONT>";

    public int GetButtonID(int typeCount, int type, int index) => 1 + index * typeCount + type;

    public bool SplitButtonID(int buttonID, int typeCount, out int type, out int index)
    {
      if (buttonID < 1)
      {
        type = 0;
        index = 0;
        return false;
      }

      buttonID -= 1;

      type = buttonID % typeCount;
      index = buttonID / typeCount;

      return true;
    }

    public void FinishPage()
    {
      if (m_Background != null)
        m_Background.Height = CurrentY + EntryHeight + OffsetSize + BorderSize;

      if (m_Offset != null)
        m_Offset.Height = CurrentY + EntryHeight + OffsetSize - BorderSize;
    }

    public void AddNewPage()
    {
      FinishPage();

      CurrentX = BorderSize + OffsetSize;
      CurrentY = BorderSize + OffsetSize;

      AddPage(++CurrentPage);

      m_Background = new GumpBackground(0, 0, 100, 100, BackGumpID);
      Add(m_Background);

      m_Offset = new GumpImageTiled(BorderSize, BorderSize, 100, 100, OffsetGumpID);
      Add(m_Offset);
    }

    public void AddNewLine()
    {
      CurrentY += EntryHeight + OffsetSize;
      CurrentX = BorderSize + OffsetSize;
    }

    public void IncreaseX(int width)
    {
      CurrentX += width + OffsetSize;

      width = CurrentX + BorderSize;

      if (m_Background != null && width > m_Background.Width)
        m_Background.Width = width;

      width = CurrentX - BorderSize;

      if (m_Offset != null && width > m_Offset.Width)
        m_Offset.Width = width;
    }

    public void AddEntryLabel(int width, string text)
    {
      AddImageTiled(CurrentX, CurrentY, width, EntryHeight, EntryGumpID);
      AddLabelCropped(CurrentX + TextOffsetX, CurrentY, width - TextOffsetX, EntryHeight, TextHue, text);

      IncreaseX(width);
    }

    public void AddEntryHtml(int width, string text)
    {
      AddImageTiled(CurrentX, CurrentY, width, EntryHeight, EntryGumpID);
      AddHtml(CurrentX + TextOffsetX, CurrentY, width - TextOffsetX, EntryHeight, text);

      IncreaseX(width);
    }

    public void AddEntryHeader(int width)
    {
      AddEntryHeader(width, 1);
    }

    public void AddEntryHeader(int width, int spannedEntries)
    {
      AddImageTiled(CurrentX, CurrentY, width, EntryHeight * spannedEntries + OffsetSize * (spannedEntries - 1),
        HeaderGumpID);
      IncreaseX(width);
    }

    public void AddBlankLine()
    {
      if (m_Offset != null)
        AddImageTiled(m_Offset.X, CurrentY, m_Offset.Width, EntryHeight, BackGumpID + 4);

      AddNewLine();
    }

    public void AddEntryButton(int width, int normalID, int pressedID, int buttonID, int buttonWidth, int buttonHeight)
    {
      AddEntryButton(width, normalID, pressedID, buttonID, buttonWidth, buttonHeight, 1);
    }

    public void AddEntryButton(int width, int normalID, int pressedID, int buttonID, int buttonWidth, int buttonHeight,
      int spannedEntries)
    {
      AddImageTiled(CurrentX, CurrentY, width, EntryHeight * spannedEntries + OffsetSize * (spannedEntries - 1),
        HeaderGumpID);
      AddButton(CurrentX + (width - buttonWidth) / 2,
        CurrentY + (EntryHeight * spannedEntries + OffsetSize * (spannedEntries - 1) - buttonHeight) / 2, normalID,
        pressedID, buttonID);

      IncreaseX(width);
    }

    public void AddEntryPageButton(int width, int normalID, int pressedID, int page, int buttonWidth, int buttonHeight)
    {
      AddImageTiled(CurrentX, CurrentY, width, EntryHeight, HeaderGumpID);
      AddButton(CurrentX + (width - buttonWidth) / 2, CurrentY + (EntryHeight - buttonHeight) / 2, normalID, pressedID,
        0, GumpButtonType.Page, page);

      IncreaseX(width);
    }

    public void AddEntryText(int width, int entryID, string initialText)
    {
      AddImageTiled(CurrentX, CurrentY, width, EntryHeight, EntryGumpID);
      AddTextEntry(CurrentX + TextOffsetX, CurrentY, width - TextOffsetX, EntryHeight, TextHue, entryID, initialText);

      IncreaseX(width);
    }
  }
}