using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using PKHeX.Core;
using PKHeX.WinForms.Properties;

namespace PKHeX.WinForms.Controls
{
    public sealed class BoxMenuStrip : ContextMenuStrip
    {
        private readonly SAVEditor sav;
        private readonly List<ItemVisibility> CustomItems = new List<ItemVisibility>();
        private readonly BoxManipulator Manipulator;

        public BoxMenuStrip(SAVEditor SAV)
        {
            Manipulator = new BoxManipulatorWF(SAV);
            sav = SAV;
            var Levels = BoxManipUtil.ManipCategories;
            var LevelNames = BoxManipUtil.ManipCategoryNames;
            for (int i = 0; i < Levels.Length; i++)
            {
                var level = Levels[i];
                var sprite = TopLevelImages[i];
                var name = LevelNames[i];
                var parent = new ToolStripMenuItem {Name = $"mnu_{name}", Text = name, Image = sprite};
                foreach (var item in level)
                    AddItem(SAV, parent, item);
                Items.Add(parent);
            }
        }

        private void AddItem(ISaveFileProvider SAV, ToolStripDropDownItem parent, IBoxManip item)
        {
            var name = item.Type.ToString();
            ManipTypeImage.TryGetValue(item.Type, out var img);
            var tsi = new ToolStripMenuItem { Name = $"mnu_{name}", Text = name, Image = img };
            tsi.Click += (s, e) => Manipulator.Execute(item, SAV.CurrentBox, All, Reverse);
            parent.DropDownItems.Add(tsi);
            CustomItems.Add(new ItemVisibility(tsi, item));
        }

        private static readonly Dictionary<BoxManipType, Image> ManipTypeImage = new Dictionary<BoxManipType, Image>
        {
            [BoxManipType.DeleteAll] = Resources.nocheck,
            [BoxManipType.DeleteEggs] = Resources.about,
            [BoxManipType.DeletePastGen] = Resources.bak,
            [BoxManipType.DeleteForeign] = Resources.users,
            [BoxManipType.DeleteUntrained] = Resources.gift,
            [BoxManipType.DeleteItemless] = Resources.main,
            [BoxManipType.DeleteIllegal] = Resources.export,

            [BoxManipType.SortSpecies] = Resources.numlohi,
            [BoxManipType.SortSpeciesReverse] = Resources.numhilo,
            [BoxManipType.SortLevel] = Resources.vallohi,
            [BoxManipType.SortLevelReverse] = Resources.valhilo,
            [BoxManipType.SortDate] = Resources.date,
            [BoxManipType.SortName] = Resources.alphaAZ,
            [BoxManipType.SortFavorite] = Resources.heart,
            [BoxManipType.SortParty] = Resources.users,
            [BoxManipType.SortShiny] = Resources.showdown,
            [BoxManipType.SortRandom] = Resources.wand,

            [BoxManipType.SortUsage] = Resources.heart,
            [BoxManipType.SortPotential] = Resources.numhilo,
            [BoxManipType.SortTraining] = Resources.showdown,
            [BoxManipType.SortOwner] = Resources.users,
            [BoxManipType.SortType] = Resources.main,
            [BoxManipType.SortVersion] = Resources.numlohi,
            [BoxManipType.SortBST] = Resources.vallohi,
            [BoxManipType.SortCP] = Resources.vallohi,
            [BoxManipType.SortLegal] = Resources.export,

            [BoxManipType.ModifyHatchEggs] = Resources.about,
            [BoxManipType.ModifyMaxFriendship] = Resources.heart,
            [BoxManipType.ModifyMaxLevel] = Resources.showdown,
            [BoxManipType.ModifyResetMoves] = Resources.date,
            [BoxManipType.ModifyRandomMoves] = Resources.wand,
            [BoxManipType.ModifyHyperTrain] = Resources.vallohi,
            [BoxManipType.ModifyRemoveNicknames] = Resources.alphaAZ,
            [BoxManipType.ModifyRemoveItem] = Resources.gift,
        };

        private sealed class ItemVisibility
        {
            private readonly ToolStripItem Item;
            private readonly IBoxManip Manip;

            public ItemVisibility(ToolStripItem toolStripItem, IBoxManip visible)
            {
                Item = toolStripItem;
                Manip = visible;
            }

            public void SetVisibility(SaveFile s) => Item.Visible = Manip.Usable?.Invoke(s) ?? true;
        }

        public void ToggleVisibility()
        {
            foreach (var s in CustomItems)
                s.SetVisibility(sav.SAV);
        }

        private static readonly Image[] TopLevelImages =
        {
            Resources.nocheck,
            Resources.swapBox,
            Resources.settings,
            Resources.wand,
        };

        public void Clear() => Manipulator.Execute(BoxManipType.DeleteAll, sav.SAV.CurrentBox, All);
        public void Sort() => Manipulator.Execute(BoxManipType.SortSpecies, sav.SAV.CurrentBox, All);

        private static bool All => (ModifierKeys & Keys.Shift) != 0;
        private static bool Reverse => (ModifierKeys & Keys.Control) != 0;
    }

    /// <summary>
    /// Implementation of a WinForms box manipulator (using MessageBox prompts)
    /// </summary>
    public sealed class BoxManipulatorWF : BoxManipulator
    {
        private readonly SAVEditor Editor;
        protected override SaveFile SAV => Editor.SAV;

        public BoxManipulatorWF(SAVEditor editor)
        {
            Editor = editor;
        }

        protected override void FinishBoxManipulation(string message, bool all) => Editor.FinishBoxManipulation(message, all);

        protected override bool CanManipulateRegion(int start, int end, string prompt, string fail)
        {
            if (prompt != null && WinFormsUtil.Prompt(MessageBoxButtons.YesNo, prompt) != DialogResult.Yes)
                return false;
            bool canModify = base.CanManipulateRegion(start, end, prompt, fail);
            if (!canModify && fail != null)
                WinFormsUtil.Alert(fail);
            return canModify;
        }
    }
}