using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace GuiWPF
{
    public class MainWindowViewModel : ViewModelBase
    {
        public ICommand LoadHomePageCommand { get; private set; }
        public ICommand LoadSettingsPageCommand { get; private set;}

        private ViewModelBase _currentViewModel;
        public ViewModelBase CurrentViewModel
        {
            get => _currentViewModel;
            set
            {
                _currentViewModel = value;
                OnPropertyChanged();
            }
        }

        public MainWindowViewModel()
        {
            this.LoadHomePage();
            this.LoadHomePageCommand = new DelegateCommand(o => this.LoadHomePage());
            this.LoadSettingsPageCommand = new DelegateCommand(o => this.LoadSettingsPage());
        }

        private void LoadHomePage()
        {
            CurrentViewModel = new HomePageViewModel(
                new HomePage { PageTitle = "This is the Home Page" });
        }

        private void LoadSettingsPage()
        {
            CurrentViewModel = new SettingsPageViewModel(
                new SettingsPage() { PageTitle = "This is the SettingsPage" });
        }
    }
}