using System;
using System.Collections.Generic;
using Avalonia.Controls;

namespace ChronoFlow.View
{
    public class ViewManager
    {
        private readonly ContentControl _contentControl;

        // Dictionary speichert die registrierten Views mit ihren Erstellungs-Methoden (Factories)
        private readonly Dictionary<string, Func<UserControl>> _views = new();

        public ViewManager(ContentControl contentControl)
        {
            _contentControl = contentControl;
        }

        /// <summary>
        /// Registriert eine View mit einem eindeutigen Namen.
        /// </summary>
        public void Register(string name, Func<UserControl> factory)
        {
            if (!_views.ContainsKey(name))
            {
                _views[name] = factory;
            }
        }

        /// <summary>
        /// Zeigt eine registrierte View an.
        /// </summary>
        public void Show(string name)
        {
            if (_views.TryGetValue(name, out var factory))
            {
                var view = factory();
                _contentControl.Content = view;
            }
            else
            {
                throw new InvalidOperationException($"View {name} is not registered");
            }
        }

        /// <summary>
        /// Holt eine bereits registrierte View als konkreten Typ (z. B. AdminMainView).
        /// </summary>
        public bool TryGetView<T>(string name, out T? view) where T : class
        {
            if (_views.TryGetValue(name, out var factory))
            {
                var instance = factory();
                view = instance as T;
                return view != null;
            }

            view = null;
            return false;
        }
    }
}