using Microsoft.Xna.Framework;
using System;
using System.Collections.Generic;
using System.Linq;

namespace OpenVIII
{
    public partial class Junction
    {
        #region Classes

        private abstract class IGMData_Values : IGMData.Base
        {
            #region Fields

            protected Saves.CharacterData prevSetting;

            private bool eventAdded = false;

            #endregion Fields

            #region Events

            public static event EventHandler<Font.ColorID> ColorChangeEventListener;

            #endregion Events

            #region Methods

            public static T Create<T>(int count, int depth, Menu_Base container = null, int? cols = null, int? rows = null) where T : IGMData_Values, new() =>
                IGMData.Base.Create<T>(count, depth, container, cols, rows);

            public override void Refresh()
            {
                //prevSetting = prevSetting;
                if (!eventAdded)
                {
                    IGMData_Mag_ST_A_D_Slots.PrevSettingUpdateEventListener += PrevSettingEvent;
                    eventAdded = true;
                }
                base.Refresh();
            }

            protected void FillData<T>(Dictionary<T, byte> oldtotal, Dictionary<T, byte> total, Enum[] availableFlagsarray, Icons.ID starticon, sbyte offset = 0, byte palette = 2, Icons.ID[] skip = null) where T : Enum
            {
                var _nag = 0;
                var _pos = 0;
                var endoffset = (sbyte)(offset > 0 ? offset : 0);

                for (sbyte pos = 0; pos < Count - endoffset; pos++)
                {
                    if (skip != null && skip.Contains(starticon + pos))
                    {
                        offset -= 1;
                        pos += 1;
                        endoffset -= 1;
                    }
                    ITEM[pos + offset, 0] = new IGMDataItem.Icon { Data = starticon + pos, Pos = new Rectangle(SIZE[pos + offset].X, SIZE[pos + offset].Y, 0, 0), Palette = palette };
                    ITEM[pos + offset, 1] = total[(T)availableFlagsarray[pos + 1]] > 100 ? new IGMDataItem.Icon { Data = Icons.ID.Star, Pos = new Rectangle(SIZE[pos + offset].X + 45, SIZE[pos + offset].Y, 0, 0), Palette = 4 } : null;
                    ITEM[pos + offset, 2] = null;
                    ITEM[pos + offset, 3] = new IGMDataItem.Integer
                    {
                        Data =
                            total[(T)availableFlagsarray[pos + 1]] > 100 ?
                            total[(T)availableFlagsarray[pos + 1]] - 100 :
                            total[(T)availableFlagsarray[pos + 1]],
                        Pos = new Rectangle(SIZE[pos + offset].X + SIZE[pos + offset].Width - 80, SIZE[pos + offset].Y, 0, 0),
                        Palette = 17,
                        NumType = Icons.NumType.SysFntBig,
                        Spaces = 3
                    };
                    ITEM[pos + offset, 4] = new IGMDataItem.Text() { Data = "%", Pos = new Rectangle(SIZE[pos + offset].X + SIZE[pos + offset].Width - 20, SIZE[pos + offset].Y, 0, 0) };
                    if (oldtotal != null)
                    {
                        if (oldtotal[(T)availableFlagsarray[pos + 1]] > total[(T)availableFlagsarray[pos + 1]])
                        {
                            ((IGMDataItem.Icon)ITEM[pos + offset, 0]).Palette = 5;
                            ((IGMDataItem.Icon)ITEM[pos + offset, 0]).Faded_Palette = 5;
                            ITEM[pos + offset, 2] = new IGMDataItem.Icon { Data = Icons.ID.Arrow_Down, Pos = new Rectangle(SIZE[pos + offset].X + SIZE[pos + offset].Width - 105, SIZE[pos + offset].Y, 0, 0), Palette = 16 };
                            ((IGMDataItem.Integer)ITEM[pos + offset, 3]).FontColor = Font.ColorID.Red;
                            ((IGMDataItem.Text)ITEM[pos + offset, 4]).FontColor = Font.ColorID.Red;

                            if (++_nag > _pos)
                                ColorChangeEventListener?.Invoke(this, Font.ColorID.Red);
                        }
                        else if (oldtotal[(T)availableFlagsarray[pos + 1]] < total[(T)availableFlagsarray[pos + 1]])
                        {
                            ((IGMDataItem.Icon)ITEM[pos + offset, 0]).Palette = 6;
                            ((IGMDataItem.Icon)ITEM[pos + offset, 0]).Faded_Palette = 6;
                            ITEM[pos + offset, 2] = new IGMDataItem.Icon { Data = Icons.ID.Arrow_Up, Pos = new Rectangle(SIZE[pos + offset].X + SIZE[pos + offset].Width - 105, SIZE[pos + offset].Y, 0, 0), Palette = 17 };
                            ((IGMDataItem.Integer)ITEM[pos + offset, 3]).FontColor = Font.ColorID.Yellow;
                            ((IGMDataItem.Text)ITEM[pos + offset, 4]).FontColor = Font.ColorID.Yellow;

                            if (_nag <= ++_pos)
                                ColorChangeEventListener?.Invoke(this, Font.ColorID.Yellow);
                        }
                    }
                }
            }

            protected Dictionary<T, byte> getTotal<T>(out Enum[] availableFlagsarray, byte max, Kernel.Stat stat, params byte[] spells) where T : Enum
            {
                const int maxspellcount = 100;
                var total = new Dictionary<T, byte>(8);
                var availableFlags = Enum.GetValues(typeof(T)).Cast<Enum>();
                foreach (var flag in availableFlags.Where(d => !total.ContainsKey((T)d)))
                    total.Add((T)flag, 0);
                for (var i = 0; i < spells.Length; i++)
                {
                    Enum flags = null;
                    var spell = spells[i];
                    var magic_Data = Memory.KernelBin.MagicData[spell];
                    switch (stat)
                    {
                        case Kernel.Stat.ElAtk:
                            flags = magic_Data.ElAtk;
                            break;

                        case Kernel.Stat.ElDef1:
                        case Kernel.Stat.ElDef2:
                        case Kernel.Stat.ElDef3:
                        case Kernel.Stat.ElDef4:
                            flags = magic_Data.ElDef;
                            break;

                        case Kernel.Stat.StAtk:
                            flags = magic_Data.StAtk;
                            break;

                        case Kernel.Stat.StDef1:
                        case Kernel.Stat.StDef2:
                        case Kernel.Stat.StDef3:
                        case Kernel.Stat.StDef4:
                            flags = magic_Data.StDef;
                            break;
                    }
                    if (flags != null && Damageable.GetCharacterData(out var c))
                        foreach (var flag in availableFlags.Where(flags.HasFlag))
                        {
                            if (c.Magics.TryGetByKey(spell, out var count) && magic_Data.JVal.TryGetValue(stat, out var value))
                            {
                                var t = total[(T)flag] + (value * count / maxspellcount);
                                total[(T)flag] = (byte)MathHelper.Clamp(t, 0, max);
                            }
                        }
                    else
                        throw new Exception($"Unknown stat, {stat}");
                }
                availableFlagsarray = availableFlags.ToArray();
                return total;
            }

            protected void PrevSettingEvent(object sender, Saves.CharacterData e) =>
                                //shadowcopy
                                prevSetting = e;

            #endregion Methods
        }

        #endregion Classes
    }
}