using System.Reflection;
using Server.Commands;
using Server.Commands.Generic;
using Server.Network;

using static Server.Gumps.PropsConfig;

namespace Server.Gumps
{
    public class SetListOptionGump : Gump
    {
        private const int EntryWidth = 212;
        private const int EntryCount = 13;

        private const int TotalWidth = OffsetSize + EntryWidth + OffsetSize + SetWidth + OffsetSize;

        private readonly object[] m_Values;
        protected Mobile m_Mobile;
        protected object m_Object;
        protected PropertyInfo m_Property;
        protected PropertiesGump m_PropertiesGump;

        public SetListOptionGump(
            PropertyInfo prop, Mobile mobile, object o, PropertiesGump propertiesGump, string[] names, object[] values
        ) : base(GumpOffsetX, GumpOffsetY)
        {
            m_PropertiesGump = propertiesGump;
            m_Property = prop;
            m_Mobile = mobile;
            m_Object = o;

            m_Values = values;

            var pages = (names.Length + EntryCount - 1) / EntryCount;
            var index = 0;

            for (var page = 1; page <= pages; ++page)
            {
                AddPage(page);

                var start = (page - 1) * EntryCount;
                var count = names.Length - start;

                if (count > EntryCount)
                {
                    count = EntryCount;
                }

                this.AddPropsFrame(TotalWidth, count + 2, out var x, out var y);
                this.AddPropsHeader(
                    TotalWidth, ref x, ref y, null,
                    page > 1, 0, page < pages, 0,
                    prevType: GumpButtonType.Page, prevParam: page - 1,
                    nextType: GumpButtonType.Page, nextParam: page + 1
                );

                AddRect(0, prop.Name, 0);

                for (var i = 0; i < count; ++i)
                {
                    AddRect(i + 1, names[index], ++index);
                }
            }
        }

        private void AddRect(int index, string str, int button)
        {
            var x = BorderSize + OffsetSize;
            var y = BorderSize + OffsetSize + (index + 1) * (EntryHeight + OffsetSize);

            AddImageTiled(x, y, EntryWidth, EntryHeight, EntryGumpID);
            AddLabelCropped(x + TextOffsetX, y, EntryWidth - TextOffsetX, EntryHeight, TextHue, str);

            x += EntryWidth + OffsetSize;

            if (SetGumpID != 0)
            {
                AddImageTiled(x, y, SetWidth, EntryHeight, SetGumpID);
            }

            if (button != 0)
            {
                AddButton(x + SetOffsetX, y + SetOffsetY, SetButtonID1, SetButtonID2, button);
            }
        }

        public override void OnResponse(NetState sender, in RelayInfo info)
        {
            var from = sender.Mobile;

            if (!BaseCommand.IsAccessible(from, m_Object))
            {
                from.SendMessage("You may no longer access their properties.");
                return;
            }

            var index = info.ButtonID - 1;

            if (index >= 0 && index < m_Values.Length)
            {
                try
                {
                    var toSet = m_Values[index];

                    var result = Properties.SetDirect(
                        m_Mobile,
                        m_Object,
                        m_Object,
                        m_Property,
                        m_Property.Name,
                        toSet,
                        true
                    );

                    m_Mobile.SendMessage(result);

                    if (result == "Property has been set.")
                    {
                        m_PropertiesGump.OnValueChanged(m_Object, m_Property);
                    }
                }
                catch
                {
                    m_Mobile.SendMessage("An exception was caught. The property may not have changed.");
                }
            }

            m_PropertiesGump.SendPropertiesGump();
        }
    }
}