using Newtonsoft.Json;
using ReactiveUI;
using System;
using System.Collections.Generic;
using System.Reactive.Disposables;
using System.Runtime.CompilerServices;
using Wabbajack.Models;

namespace Wabbajack
{
    public class ViewModel : ReactiveObject, IDisposable, IActivatableViewModel
    {
        private readonly Lazy<CompositeDisposable> _compositeDisposable = new();
        [JsonIgnore]
        public CompositeDisposable CompositeDisposable => _compositeDisposable.Value;

        [JsonIgnore] public LoadingLock LoadingLock { get; } = new();

        public virtual void Dispose()
        {
            if (_compositeDisposable.IsValueCreated)
            {
                _compositeDisposable.Value.Dispose();
            }
        }

        protected void RaiseAndSetIfChanged<T>(
            ref T item,
            T newItem,
            [CallerMemberName] string? propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(item, newItem)) return;
            item = newItem;
            this.RaisePropertyChanged(propertyName);
        }

        public ViewModelActivator Activator { get; } = new();
    }
}