using Spectre.Console;

using System.Collections;
using System.ComponentModel;

namespace SpectreTester;

internal class Program
{
    private static void Main(string[] args)
    {
        var choices = new SmartSelections
        {
            {"Get the version of the database ", (_) =>
                {
                    AnsiConsole.MarkupLine("A");
                }
            },
            {"List all migrations", (_) => { AnsiConsole.MarkupLine("B");  } },
            {"List all pending migrations", (_) => { AnsiConsole.MarkupLine("C");  } },
            {"Update the database to the latest version", (_) => { AnsiConsole.MarkupLine("D");  } },
            {"Update the database to a specific version", (_) => { AnsiConsole.MarkupLine("E");  } },
        };

        _ = Task.Run(async () =>
        {
            await Task.Delay(1000);
            choices.First().Selection = "Hi mom";
        });

        var prompt = new SelectionPrompt<SmartSelectionItem>()
                .Title("What would you like to do?")
                .PageSize(10)
                .MoreChoicesText("[grey](Move up and down to reveal more options)[/]")
                .AddChoices(choices);

        var selection = AnsiConsole.Prompt(prompt);

    }
}

internal class SmartSelections : IEnumerable<SmartSelectionItem>
{
    private readonly List<SmartSelectionItem> _items = new();

    public void Add(string selection, Action<SmartSelectionItem> onSelect)
    {
        _items.Add(new SmartSelectionItem(selection, onSelect));
    }

    public IEnumerator<SmartSelectionItem> GetEnumerator()
    {
        return _items.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }
}

internal class SmartSelectionItem : INotifyPropertyChanged
{
    private string selection;
    private readonly Func<SmartSelectionItem, int> _onSelect;

    public string Selection
    {
        get => selection;
        set
        {
            selection = value;
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Selection)));
        }
    }

    public event PropertyChangedEventHandler? PropertyChanged;

    public SmartSelectionItem(string selection, Action<SmartSelectionItem> onSelect)
    {
        Selection = selection;
        _onSelect = (x) => { onSelect(x); return 0; };
    }

    public SmartSelectionItem(string selection, Func<SmartSelectionItem, int> onSelect)
    {
        Selection = selection;
        _onSelect = onSelect;
    }

    public override string ToString() => Selection;

    public void OnSelect() => _onSelect(this);
}