using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
using System.Windows;
using System.Windows.Input;
using XLIMS.CONTRACT;
using XLIMS.CORE.Windows;
using XLIMS.MVVM.Base;

namespace XLIMS.CORE.ViewModels
{
    public class MainViewModel:ViewModelBase
    {
        #region Constructor
        public MainViewModel(IServiceProvider serviceProvider) 
        {
            _serviceProvider = serviceProvider;

            // Регистрация доступных activities
            Activities.Add(serviceProvider.GetRequiredService<XLIMS.PSV.ViewModels.MainViewModel>());
            Activities.Add(serviceProvider.GetRequiredService<XLIMS.DEV.ViewModels.MainViewModel>());
            Activities.Add(serviceProvider.GetRequiredService<XLIMS.SP.ViewModels.MainViewModel>());
            Activities.Add(serviceProvider.GetRequiredService<XLIMS.TPRZ.ViewModels.MainViewModel>());

            // По умолчанию открываем первую
            CurrentActivity = Activities.FirstOrDefault();

            NavigateCommand = new RelayCommand<IActivityViewModel>(Navigate);
        }
        #endregion //Constructor

        #region Events
        #endregion //Events

        #region Fields
        public readonly IServiceProvider _serviceProvider;
        #endregion //Fields

        #region Properties
        public ObservableCollection<IActivityViewModel> Activities { get; }
            = new ObservableCollection<IActivityViewModel>();

        private IActivityViewModel _currentActivity;
        public IActivityViewModel CurrentActivity
        {
            get => _currentActivity;
            set
            {
                if (_currentActivity != value)
                {
                    _currentActivity = value;
                    OnPropertyChanged();
                }
            }
        }
        #endregion //Properties

        #region Methods
        private void Navigate(IActivityViewModel vm)
        {
            if (vm != null)
                CurrentActivity = vm;
        }
        #endregion //Methods

        #region Commands
        public ICommand NavigateCommand { get; }
        #endregion //Commands
    }
}