using System.Threading.Tasks;
using API.Data.Repositories;
using API.Entities;
using API.Interfaces;
using API.Interfaces.Repositories;
using AutoMapper;
using Microsoft.AspNetCore.Identity;

namespace API.Data
{
    public class UnitOfWork : IUnitOfWork
    {
        private readonly DataContext _context;
        private readonly IMapper _mapper;
        private readonly UserManager<AppUser> _userManager;

        public UnitOfWork(DataContext context, IMapper mapper, UserManager<AppUser> userManager)
        {
            _context = context;
            _mapper = mapper;
            _userManager = userManager;
        }

        public ISeriesRepository SeriesRepository => new SeriesRepository(_context, _mapper);
        public IUserRepository UserRepository => new UserRepository(_context, _userManager, _mapper);
        public ILibraryRepository LibraryRepository => new LibraryRepository(_context, _mapper);

        public IVolumeRepository VolumeRepository => new VolumeRepository(_context, _mapper);

        public ISettingsRepository SettingsRepository => new SettingsRepository(_context, _mapper);

        public IAppUserProgressRepository AppUserProgressRepository => new AppUserProgressRepository(_context);
        public ICollectionTagRepository CollectionTagRepository => new CollectionTagRepository(_context, _mapper);
        public IFileRepository FileRepository => new FileRepository(_context);
        public IChapterRepository ChapterRepository => new ChapterRepository(_context, _mapper);
        public IReadingListRepository ReadingListRepository => new ReadingListRepository(_context, _mapper);
        public ISeriesMetadataRepository SeriesMetadataRepository => new SeriesMetadataRepository(_context);

        /// <summary>
        /// Commits changes to the DB. Completes the open transaction.
        /// </summary>
        /// <returns></returns>
        public bool Commit()
        {
            return _context.SaveChanges() > 0;
        }
        /// <summary>
        /// Commits changes to the DB. Completes the open transaction.
        /// </summary>
        /// <returns></returns>
        public async Task<bool> CommitAsync()
        {
            return await _context.SaveChangesAsync() > 0;
        }

        /// <summary>
        /// Is the DB Context aware of Changes in loaded entities
        /// </summary>
        /// <returns></returns>
        public bool HasChanges()
        {
            return _context.ChangeTracker.HasChanges();
        }

        /// <summary>
        /// Rollback transaction
        /// </summary>
        /// <returns></returns>
        public async Task<bool> RollbackAsync()
        {
            await _context.DisposeAsync();
            return true;
        }
        /// <summary>
        /// Rollback transaction
        /// </summary>
        /// <returns></returns>
        public bool Rollback()
        {
            _context.Dispose();
            return true;
        }
    }
}