using System.Reactive.Linq;
using System.Reactive.Subjects;
using FileTime.Core.Enums;
using FileTime.Core.Models;

namespace FileTime.Core.Services
{
    public abstract class ContentProviderBase : IContentProvider
    {
        protected BehaviorSubject<IReadOnlyList<IAbsolutePath>> Items { get; } = new BehaviorSubject<IReadOnlyList<IAbsolutePath>>(new List<IAbsolutePath>());

        IObservable<IReadOnlyList<IAbsolutePath>> IContainer.Items => Items;

        public string Name { get; }

        public string DisplayName { get; }

        public FullName? FullName => null;

        public NativePath? NativePath => null;

        public bool IsHidden => false;

        public bool IsExists => true;

        public SupportsDelete CanDelete => SupportsDelete.False;

        public bool CanRename => false;

        public IContentProvider Provider => this;

        public FullName? Parent => null;

        public DateTime? CreatedAt => null;

        public string? Attributes => null;

        protected BehaviorSubject<bool> IsLoading { get; } = new(false);

        IObservable<bool> IContainer.IsLoading => IsLoading.AsObservable();

        protected ContentProviderBase(string name)
        {
            DisplayName = Name = name;
        }

        public virtual Task OnEnter() => Task.CompletedTask;
        public virtual async Task<IItem> GetItemByFullNameAsync(FullName fullName) => await GetItemByNativePathAsync(GetNativePath(fullName));
        public abstract Task<IItem> GetItemByNativePathAsync(NativePath nativePath);
        public abstract Task<List<IAbsolutePath>> GetItemsByContainerAsync(FullName fullName);
        public abstract NativePath GetNativePath(FullName fullName);
    }
}