using System.Diagnostics.CodeAnalysis;
using Sandbox;
using Sandbox.Game.Gui;
using Sandbox.Game.Localization;
using Sandbox.Graphics.GUI;
using VRage;
using VRage.Game;
using VRage.Utils;
using VRageMath;
using Color = VRageMath.Color;

namespace PluginLoader.GUI;

[SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
public abstract class TableDialogBase : MyGuiScreenDebugBase
{
    protected readonly string Caption;
    protected readonly string DefaultKey;
    protected readonly Dictionary<string, string> NamesByKey = new();
    protected MyGuiControlButton CancelButton;

    protected int ColumnCount;
    protected MyGuiControlButton DeleteButton;

    protected MyGuiControlButton LoadButton;
    protected MyGuiControlButton RenameButton;

    protected MyGuiControlTable Table;

    protected TableDialogBase(
        string caption,
        string defaultKey = null)
        : base(new(0.5f, 0.5f), new Vector2(1f, 0.8f),
               MyGuiConstants.SCREEN_BACKGROUND_COLOR * MySandboxGame.Config.UIBkOpacity, true)
    {
        Caption = caption;
        DefaultKey = defaultKey;

        // ReSharper disable once VirtualMemberCallInConstructor
        RecreateControls(true);

        CanBeHidden = true;
        CanHideOthers = true;
        CloseButtonEnabled = true;

        m_onEnterCallback = LoadAndClose;
    }

    protected abstract string ItemName { get; }
    protected abstract string[] ColumnHeaders { get; }
    protected abstract float[] ColumnWidths { get; }
    protected abstract object[] ExampleValues { get; }

    private Vector2 DialogSize => m_size ?? Vector2.One;

    private string SelectedKey => Table.SelectedRow?.UserData as string;

    public override string GetFriendlyName()
    {
        return "ListDialog";
    }

    protected virtual string NormalizeName(string name)
    {
        return name.Trim();
    }

    protected virtual int CompareNames(string a, string b)
    {
        return string.Compare(a, b, StringComparison.CurrentCultureIgnoreCase);
    }

    protected abstract IEnumerable<string> IterItemKeys();
    protected abstract ItemView GetItemView(string key);

    protected abstract void OnLoad(string key);
    protected abstract void OnRenamed(string key, string name);
    protected abstract void OnDelete(string key);

    public override void RecreateControls(bool constructor)
    {
        base.RecreateControls(constructor);

        AddCaption(Caption, Color.White.ToVector4(), new Vector2(0.0f, 0.003f));

        CreateTable();
        CreateButtons();
    }

    private void CreateTable()
    {
        var columnHeaders = ColumnHeaders;
        var columnWidths = ColumnWidths;

        if (columnHeaders == null || columnWidths == null)
            return;

        ColumnCount = columnHeaders.Length;

        Table = new()
        {
            Position = new(0.001f, -0.5f * DialogSize.Y + 0.1f),
            Size = new(0.85f * DialogSize.X, DialogSize.Y - 0.25f),
            OriginAlign = MyGuiDrawAlignEnum.HORISONTAL_CENTER_AND_VERTICAL_TOP,
            ColumnsCount = ColumnCount,
            VisibleRowsCount = 15
        };

        Table.SetCustomColumnWidths(columnWidths);

        var exampleValues = ExampleValues;
        for (var colIdx = 0; colIdx < ColumnCount; colIdx++)
        {
            Table.SetColumnName(colIdx, new(columnHeaders[colIdx]));

            switch (exampleValues[colIdx])
            {
                case int _:
                    Table.SetColumnComparison(colIdx, CellIntComparison);
                    break;

                default:
                    Table.SetColumnComparison(colIdx, CellTextComparison);
                    break;
            }
        }

        AddItems();

        Table.SortByColumn(0);

        Table.ItemDoubleClicked += OnItemDoubleClicked;

        Controls.Add(Table);
    }

    private int CellTextComparison(MyGuiControlTable.Cell x, MyGuiControlTable.Cell y)
    {
        var a = NormalizeName(x.Text.ToString());
        var b = NormalizeName(y.Text.ToString());
        return CompareNames(a, b);
    }

    private int CellIntComparison(MyGuiControlTable.Cell x, MyGuiControlTable.Cell y)
    {
        return (x.UserData as int? ?? 0) - (y.UserData as int? ?? 0);
    }

    private void CreateButtons()
    {
        LoadButton = new(
            visualStyle: MyGuiControlButtonStyleEnum.Default,
            originAlign: MyGuiDrawAlignEnum.HORISONTAL_CENTER_AND_VERTICAL_CENTER,
            text: new("Load"), onButtonClick: OnLoadButtonClick);

        RenameButton = new(
            visualStyle: MyGuiControlButtonStyleEnum.Small,
            originAlign: MyGuiDrawAlignEnum.HORISONTAL_CENTER_AND_VERTICAL_CENTER,
            text: new("Rename"), onButtonClick: OnRenameButtonClick);

        DeleteButton = new(
            visualStyle: MyGuiControlButtonStyleEnum.Small,
            originAlign: MyGuiDrawAlignEnum.HORISONTAL_CENTER_AND_VERTICAL_CENTER,
            text: new("Delete"), onButtonClick: OnDeleteButtonClick);

        CancelButton = new(
            visualStyle: MyGuiControlButtonStyleEnum.Default,
            originAlign: MyGuiDrawAlignEnum.HORISONTAL_CENTER_AND_VERTICAL_CENTER,
            text: MyTexts.Get(MyCommonTexts.Cancel), onButtonClick: OnCancelButtonClick);

        var xs = 0.85f * DialogSize.X;
        var y = 0.5f * (DialogSize.Y - 0.15f);
        LoadButton.Position = new(-0.39f * xs, y);
        RenameButton.Position = new(-0.08f * xs, y);
        DeleteButton.Position = new(0.08f * xs, y);
        CancelButton.Position = new(0.39f * xs, y);

        LoadButton.SetToolTip($"Loads the selected {ItemName}");
        RenameButton.SetToolTip($"Renames the selected {ItemName}");
        DeleteButton.SetToolTip($"Deletes the selected {ItemName}");
        CancelButton.SetToolTip(MyTexts.GetString(MySpaceTexts.ToolTipOptionsSpace_Cancel));

        Controls.Add(LoadButton);
        Controls.Add(RenameButton);
        Controls.Add(DeleteButton);
        Controls.Add(CancelButton);
    }

    private void AddItems()
    {
        NamesByKey.Clear();

        foreach (var key in IterItemKeys())
            AddRow(key);

        if (TryFindRow(DefaultKey, out var rowIdx))
            Table.SelectedRowIndex = rowIdx;
    }

    private void AddRow(string key)
    {
        var view = GetItemView(key);
        if (view == null)
            return;

        var row = new MyGuiControlTable.Row(key);
        for (var i = 0; i < ColumnCount; i++)
            row.AddCell(new(view.Labels[i], view.Values[i]));

        Table.Add(row);
        NamesByKey[key] = view.Labels[0];
    }

    private void OnItemDoubleClicked(MyGuiControlTable table, MyGuiControlTable.EventArgs args)
    {
        LoadAndClose();
    }

    private void OnLoadButtonClick(MyGuiControlButton _)
    {
        LoadAndClose();
    }

    private void LoadAndClose()
    {
        if (string.IsNullOrEmpty(SelectedKey))
            return;

        OnLoad(SelectedKey);
        CloseScreen();
    }

    private void OnCancelButtonClick(MyGuiControlButton _)
    {
        CloseScreen();
    }

    private void OnRenameButtonClick(MyGuiControlButton _)
    {
        if (string.IsNullOrEmpty(SelectedKey))
            return;

        if (!NamesByKey.TryGetValue(SelectedKey, out var oldName))
            return;

        MyGuiSandbox.AddScreen(new NameDialog(newName => OnNewNameSpecified(SelectedKey, newName),
                                              $"Rename saved {ItemName}", oldName));
    }

    private void OnNewNameSpecified(string key, string newName)
    {
        newName = NormalizeName(newName);

        if (!TryFindRow(key, out var rowIdx))
            return;

        OnRenamed(key, newName);

        var view = GetItemView(key);

        NamesByKey[key] = view.Labels[0];

        var row = Table.GetRow(rowIdx);
        for (var colIdx = 0; colIdx < ColumnCount; colIdx++)
        {
            var cell = row.GetCell(colIdx);
            var sb = cell.Text;
            sb.Clear();
            sb.Append(view.Labels[colIdx]);
        }

        Table.Sort();
    }

    private void OnDeleteButtonClick(MyGuiControlButton _)
    {
        var key = SelectedKey;
        if (string.IsNullOrEmpty(key))
            return;

        var name = NamesByKey.GetValueOrDefault(key) ?? "?";

        MyGuiSandbox.AddScreen(
            MyGuiSandbox.CreateMessageBox(buttonType: MyMessageBoxButtonsType.YES_NO,
                                          messageText: new(
                                              $"Are you sure to delete this saved {ItemName}?\r\n\r\n{name}"),
                                          messageCaption: new("Confirmation"),
                                          callback: result => OnDeleteForSure(result, key)));
    }

    private void OnDeleteForSure(MyGuiScreenMessageBox.ResultEnum result, string key)
    {
        if (result != MyGuiScreenMessageBox.ResultEnum.YES)
            return;

        NamesByKey.Remove(key);

        if (TryFindRow(key, out var rowIdx))
            Table.Remove(Table.GetRow(rowIdx));

        OnDelete(key);
    }

    private bool TryFindRow(string key, out int index)
    {
        if (key == null)
        {
            index = -1;
            return false;
        }

        var count = Table.RowsCount;
        for (index = 0; index < count; index++)
            if (Table.GetRow(index).UserData as string == key)
                return true;

        index = -1;
        return false;
    }
}