using System.Threading.Tasks;
using MediaBrowser.Controller;
using MediaBrowser.Controller.IO;
using MediaBrowser.Controller.Library;
using MediaBrowser.Model.Entities;
using ServiceStack.ServiceHost;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;

namespace MediaBrowser.Api.Library
{
    /// <summary>
    /// Class GetDefaultVirtualFolders
    /// </summary>
    [Route("/Library/VirtualFolders", "GET")]
    [Route("/Users/{UserId}/VirtualFolders", "GET")]
    public class GetVirtualFolders : IReturn<List<VirtualFolderInfo>>
    {
        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        public string UserId { get; set; }
    }

    [Route("/Library/VirtualFolders/{Name}", "POST")]
    [Route("/Users/{UserId}/VirtualFolders/{Name}", "POST")]
    public class AddVirtualFolder : IReturnVoid
    {
        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        public string UserId { get; set; }
        
        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets the type of the collection.
        /// </summary>
        /// <value>The type of the collection.</value>
        public string CollectionType { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [refresh library].
        /// </summary>
        /// <value><c>true</c> if [refresh library]; otherwise, <c>false</c>.</value>
        public bool RefreshLibrary { get; set; }
    }

    [Route("/Library/VirtualFolders/{Name}", "DELETE")]
    [Route("/Users/{UserId}/VirtualFolders/{Name}", "DELETE")]
    public class RemoveVirtualFolder : IReturnVoid
    {
        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        public string UserId { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [refresh library].
        /// </summary>
        /// <value><c>true</c> if [refresh library]; otherwise, <c>false</c>.</value>
        public bool RefreshLibrary { get; set; }
    }

    [Route("/Library/VirtualFolders/{Name}/Name", "POST")]
    [Route("/Users/{UserId}/VirtualFolders/{Name}/Name", "POST")]
    public class RenameVirtualFolder : IReturnVoid
    {
        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        public string UserId { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string NewName { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [refresh library].
        /// </summary>
        /// <value><c>true</c> if [refresh library]; otherwise, <c>false</c>.</value>
        public bool RefreshLibrary { get; set; }
    }

    [Route("/Library/VirtualFolders/{Name}/Paths", "POST")]
    [Route("/Users/{UserId}/VirtualFolders/{Name}/Paths", "POST")]
    public class AddMediaPath : IReturnVoid
    {
        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        public string UserId { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Path { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [refresh library].
        /// </summary>
        /// <value><c>true</c> if [refresh library]; otherwise, <c>false</c>.</value>
        public bool RefreshLibrary { get; set; }
    }
    
    [Route("/Library/VirtualFolders/{Name}/Paths", "DELETE")]
    [Route("/Users/{UserId}/VirtualFolders/{Name}/Paths", "DELETE")]
    public class RemoveMediaPath : IReturnVoid
    {
        /// <summary>
        /// Gets or sets the user id.
        /// </summary>
        /// <value>The user id.</value>
        public string UserId { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Name { get; set; }

        /// <summary>
        /// Gets or sets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Path { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether [refresh library].
        /// </summary>
        /// <value><c>true</c> if [refresh library]; otherwise, <c>false</c>.</value>
        public bool RefreshLibrary { get; set; }
    }

    /// <summary>
    /// Class LibraryStructureService
    /// </summary>
    public class LibraryStructureService : BaseApiService
    {
        /// <summary>
        /// The _app paths
        /// </summary>
        private readonly IServerApplicationPaths _appPaths;

        /// <summary>
        /// The _user manager
        /// </summary>
        private readonly IUserManager _userManager;

        /// <summary>
        /// The _library manager
        /// </summary>
        private readonly ILibraryManager _libraryManager;

        private readonly IDirectoryWatchers _directoryWatchers;
        
        /// <summary>
        /// Initializes a new instance of the <see cref="LibraryStructureService"/> class.
        /// </summary>
        /// <param name="appPaths">The app paths.</param>
        /// <param name="userManager">The user manager.</param>
        /// <param name="libraryManager">The library manager.</param>
        /// <exception cref="System.ArgumentNullException">appPaths</exception>
        public LibraryStructureService(IServerApplicationPaths appPaths, IUserManager userManager, ILibraryManager libraryManager, IDirectoryWatchers directoryWatchers)
        {
            if (appPaths == null)
            {
                throw new ArgumentNullException("appPaths");
            }

            _userManager = userManager;
            _appPaths = appPaths;
            _libraryManager = libraryManager;
            _directoryWatchers = directoryWatchers;
        }

        /// <summary>
        /// Gets the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        /// <returns>System.Object.</returns>
        public object Get(GetVirtualFolders request)
        {
            if (string.IsNullOrEmpty(request.UserId))
            {
                var result = _libraryManager.GetDefaultVirtualFolders().OrderBy(i => i.Name).ToList();

                return ToOptimizedResult(result);
            }
            else
            {
                var user = _userManager.GetUserById(new Guid(request.UserId));

                var result = _libraryManager.GetVirtualFolders(user).OrderBy(i => i.Name).ToList();

                return ToOptimizedResult(result);
            }
        }

        /// <summary>
        /// Posts the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        public async void Post(AddVirtualFolder request)
        {
            _directoryWatchers.Stop();

            try
            {
                if (string.IsNullOrEmpty(request.UserId))
                {
                    LibraryHelpers.AddVirtualFolder(request.Name, request.CollectionType, null, _appPaths);
                }
                else
                {
                    var user = _userManager.GetUserById(new Guid(request.UserId));

                    LibraryHelpers.AddVirtualFolder(request.Name, request.CollectionType, user, _appPaths);
                }

                // Need to add a delay here or directory watchers may still pick up the changes
                await Task.Delay(1000).ConfigureAwait(false);
            }
            finally
            {
                _directoryWatchers.Start();
            }

            if (request.RefreshLibrary)
            {
                _libraryManager.ValidateMediaLibrary(new Progress<double>(), CancellationToken.None);
            }
        }

        /// <summary>
        /// Posts the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        public async void Post(RenameVirtualFolder request)
        {
            _directoryWatchers.Stop();

            try
            {
                if (string.IsNullOrEmpty(request.UserId))
                {
                    LibraryHelpers.RenameVirtualFolder(request.Name, request.NewName, null, _appPaths);
                }
                else
                {
                    var user = _userManager.GetUserById(new Guid(request.UserId));

                    LibraryHelpers.RenameVirtualFolder(request.Name, request.NewName, user, _appPaths);
                }

                // Need to add a delay here or directory watchers may still pick up the changes
                await Task.Delay(1000).ConfigureAwait(false);
            }
            finally
            {
                _directoryWatchers.Start();
            }

            if (request.RefreshLibrary)
            {
                _libraryManager.ValidateMediaLibrary(new Progress<double>(), CancellationToken.None);
            }
        }
        
        /// <summary>
        /// Deletes the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        public async void Delete(RemoveVirtualFolder request)
        {
            _directoryWatchers.Stop();

            try
            {
                if (string.IsNullOrEmpty(request.UserId))
                {
                    LibraryHelpers.RemoveVirtualFolder(request.Name, null, _appPaths);
                }
                else
                {
                    var user = _userManager.GetUserById(new Guid(request.UserId));

                    LibraryHelpers.RemoveVirtualFolder(request.Name, user, _appPaths);
                }

                // Need to add a delay here or directory watchers may still pick up the changes
                await Task.Delay(1000).ConfigureAwait(false);
            }
            finally
            {
                _directoryWatchers.Start();
            }

            if (request.RefreshLibrary)
            {
                _libraryManager.ValidateMediaLibrary(new Progress<double>(), CancellationToken.None);
            }
        }

        /// <summary>
        /// Posts the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        public async void Post(AddMediaPath request)
        {
            _directoryWatchers.Stop();

            try
            {
                if (string.IsNullOrEmpty(request.UserId))
                {
                    LibraryHelpers.AddMediaPath(request.Name, request.Path, null, _appPaths);
                }
                else
                {
                    var user = _userManager.GetUserById(new Guid(request.UserId));

                    LibraryHelpers.AddMediaPath(request.Name, request.Path, user, _appPaths);
                }

                // Need to add a delay here or directory watchers may still pick up the changes
                await Task.Delay(1000).ConfigureAwait(false);
            }
            finally
            {
                _directoryWatchers.Start();
            }

            if (request.RefreshLibrary)
            {
                _libraryManager.ValidateMediaLibrary(new Progress<double>(), CancellationToken.None);
            }
        }

        /// <summary>
        /// Deletes the specified request.
        /// </summary>
        /// <param name="request">The request.</param>
        public async void Delete(RemoveMediaPath request)
        {
            _directoryWatchers.Stop();

            try
            {
                if (string.IsNullOrEmpty(request.UserId))
                {
                    LibraryHelpers.RemoveMediaPath(request.Name, request.Path, null, _appPaths);
                }
                else
                {
                    var user = _userManager.GetUserById(new Guid(request.UserId));

                    LibraryHelpers.RemoveMediaPath(request.Name, request.Path, user, _appPaths);
                }

                // Need to add a delay here or directory watchers may still pick up the changes
                await Task.Delay(1000).ConfigureAwait(false);
            }
            finally
            {
                _directoryWatchers.Start();
            }

            if (request.RefreshLibrary)
            {
                _libraryManager.ValidateMediaLibrary(new Progress<double>(), CancellationToken.None);
            }
        }
    }
}