//using System;
//using System.Collections.Generic;
//using System.Globalization;
//using System.IO;
//using System.Text;
//using System.Threading;
//using System.Threading.Tasks;
//using MediaBrowser.Common.Configuration;
//using MediaBrowser.Controller.Entities;
//using MediaBrowser.Controller.Persistence;
//using MediaBrowser.Model.Logging;
//using SQLitePCL.pretty;

//namespace Emby.Server.Implementations.Data
//{
//    public class SqliteUserDataRepository : BaseSqliteRepository, IUserDataRepository
//    {
//        private SQLiteDatabaseConnection _connection;

//        public SqliteUserDataRepository(ILogger logger, IApplicationPaths appPaths)
//            : base(logger)
//        {
//            DbFilePath = Path.Combine(appPaths.DataPath, "userdata_v2.db");
//        }

//        protected override bool EnableConnectionPooling
//        {
//            get { return false; }
//        }

//        /// <summary>
//        /// Gets the name of the repository
//        /// </summary>
//        /// <value>The name.</value>
//        public string Name
//        {
//            get
//            {
//                return "SQLite";
//            }
//        }

//        /// <summary>
//        /// Opens the connection to the database
//        /// </summary>
//        /// <returns>Task.</returns>
//        public void Initialize(SQLiteDatabaseConnection connection, ReaderWriterLockSlim writeLock)
//        {
//            WriteLock.Dispose();
//            WriteLock = writeLock;
//            _connection = connection;

//            string[] queries = {

//                                "create table if not exists UserDataDb.userdata (key nvarchar, userId GUID, rating float null, played bit, playCount int, isFavorite bit, playbackPositionTicks bigint, lastPlayedDate datetime null)",

//                                "drop index if exists UserDataDb.idx_userdata",
//                                "drop index if exists UserDataDb.idx_userdata1",
//                                "drop index if exists UserDataDb.idx_userdata2",
//                                "drop index if exists UserDataDb.userdataindex1",

//                                "create unique index if not exists UserDataDb.userdataindex on userdata (key, userId)",
//                                "create index if not exists UserDataDb.userdataindex2 on userdata (key, userId, played)",
//                                "create index if not exists UserDataDb.userdataindex3 on userdata (key, userId, playbackPositionTicks)",
//                                "create index if not exists UserDataDb.userdataindex4 on userdata (key, userId, isFavorite)",

//                                //pragmas
//                                "pragma temp_store = memory",

//                                "pragma shrink_memory"
//                               };

//            _connection.RunQueries(queries);

//            connection.RunInTransaction(db =>
//            {
//                var existingColumnNames = GetColumnNames(db, "userdata");

//                AddColumn(db, "userdata", "AudioStreamIndex", "int", existingColumnNames);
//                AddColumn(db, "userdata", "SubtitleStreamIndex", "int", existingColumnNames);
//            });
//        }

//        /// <summary>
//        /// Saves the user data.
//        /// </summary>
//        /// <param name="userId">The user id.</param>
//        /// <param name="key">The key.</param>
//        /// <param name="userData">The user data.</param>
//        /// <param name="cancellationToken">The cancellation token.</param>
//        /// <returns>Task.</returns>
//        /// <exception cref="System.ArgumentNullException">userData
//        /// or
//        /// cancellationToken
//        /// or
//        /// userId
//        /// or
//        /// userDataId</exception>
//        public Task SaveUserData(Guid userId, string key, UserItemData userData, CancellationToken cancellationToken)
//        {
//            if (userData == null)
//            {
//                throw new ArgumentNullException("userData");
//            }
//            if (userId == Guid.Empty)
//            {
//                throw new ArgumentNullException("userId");
//            }
//            if (string.IsNullOrEmpty(key))
//            {
//                throw new ArgumentNullException("key");
//            }

//            return PersistUserData(userId, key, userData, cancellationToken);
//        }

//        public Task SaveAllUserData(Guid userId, IEnumerable<UserItemData> userData, CancellationToken cancellationToken)
//        {
//            if (userData == null)
//            {
//                throw new ArgumentNullException("userData");
//            }
//            if (userId == Guid.Empty)
//            {
//                throw new ArgumentNullException("userId");
//            }

//            return PersistAllUserData(userId, userData, cancellationToken);
//        }

//        /// <summary>
//        /// Persists the user data.
//        /// </summary>
//        /// <param name="userId">The user id.</param>
//        /// <param name="key">The key.</param>
//        /// <param name="userData">The user data.</param>
//        /// <param name="cancellationToken">The cancellation token.</param>
//        /// <returns>Task.</returns>
//        public async Task PersistUserData(Guid userId, string key, UserItemData userData, CancellationToken cancellationToken)
//        {
//            cancellationToken.ThrowIfCancellationRequested();

//            await WriteLock.WaitAsync(cancellationToken).ConfigureAwait(false);

//            IDbTransaction transaction = null;

//            try
//            {
//                transaction = _connection.BeginTransaction();

//                using (var cmd = _connection.CreateCommand())
//                {
//                    cmd.CommandText = "replace into userdata (key, userId, rating,played,playCount,isFavorite,playbackPositionTicks,lastPlayedDate,AudioStreamIndex,SubtitleStreamIndex) values (@key, @userId, @rating,@played,@playCount,@isFavorite,@playbackPositionTicks,@lastPlayedDate,@AudioStreamIndex,@SubtitleStreamIndex)";

//                    cmd.Parameters.Add(cmd, "@key", DbType.String).Value = key;
//                    cmd.Parameters.Add(cmd, "@userId", DbType.Guid).Value = userId;
//                    cmd.Parameters.Add(cmd, "@rating", DbType.Double).Value = userData.Rating;
//                    cmd.Parameters.Add(cmd, "@played", DbType.Boolean).Value = userData.Played;
//                    cmd.Parameters.Add(cmd, "@playCount", DbType.Int32).Value = userData.PlayCount;
//                    cmd.Parameters.Add(cmd, "@isFavorite", DbType.Boolean).Value = userData.IsFavorite;
//                    cmd.Parameters.Add(cmd, "@playbackPositionTicks", DbType.Int64).Value = userData.PlaybackPositionTicks;
//                    cmd.Parameters.Add(cmd, "@lastPlayedDate", DbType.DateTime).Value = userData.LastPlayedDate;
//                    cmd.Parameters.Add(cmd, "@AudioStreamIndex", DbType.Int32).Value = userData.AudioStreamIndex;
//                    cmd.Parameters.Add(cmd, "@SubtitleStreamIndex", DbType.Int32).Value = userData.SubtitleStreamIndex;

//                    cmd.Transaction = transaction;

//                    cmd.ExecuteNonQuery();
//                }

//                transaction.Commit();
//            }
//            catch (OperationCanceledException)
//            {
//                if (transaction != null)
//                {
//                    transaction.Rollback();
//                }

//                throw;
//            }
//            catch (Exception e)
//            {
//                Logger.ErrorException("Failed to save user data:", e);

//                if (transaction != null)
//                {
//                    transaction.Rollback();
//                }

//                throw;
//            }
//            finally
//            {
//                if (transaction != null)
//                {
//                    transaction.Dispose();
//                }

//                WriteLock.Release();
//            }
//        }

//        /// <summary>
//        /// Persist all user data for the specified user
//        /// </summary>
//        /// <param name="userId"></param>
//        /// <param name="userData"></param>
//        /// <param name="cancellationToken"></param>
//        /// <returns></returns>
//        private async Task PersistAllUserData(Guid userId, IEnumerable<UserItemData> userData, CancellationToken cancellationToken)
//        {
//            cancellationToken.ThrowIfCancellationRequested();

//            await WriteLock.WaitAsync(cancellationToken).ConfigureAwait(false);

//            IDbTransaction transaction = null;

//            try
//            {
//                transaction = _connection.BeginTransaction();

//                foreach (var userItemData in userData)
//                {
//                    using (var cmd = _connection.CreateCommand())
//                    {
//                        cmd.CommandText = "replace into userdata (key, userId, rating,played,playCount,isFavorite,playbackPositionTicks,lastPlayedDate,AudioStreamIndex,SubtitleStreamIndex) values (@key, @userId, @rating,@played,@playCount,@isFavorite,@playbackPositionTicks,@lastPlayedDate,@AudioStreamIndex,@SubtitleStreamIndex)";

//                        cmd.Parameters.Add(cmd, "@key", DbType.String).Value = userItemData.Key;
//                        cmd.Parameters.Add(cmd, "@userId", DbType.Guid).Value = userId;
//                        cmd.Parameters.Add(cmd, "@rating", DbType.Double).Value = userItemData.Rating;
//                        cmd.Parameters.Add(cmd, "@played", DbType.Boolean).Value = userItemData.Played;
//                        cmd.Parameters.Add(cmd, "@playCount", DbType.Int32).Value = userItemData.PlayCount;
//                        cmd.Parameters.Add(cmd, "@isFavorite", DbType.Boolean).Value = userItemData.IsFavorite;
//                        cmd.Parameters.Add(cmd, "@playbackPositionTicks", DbType.Int64).Value = userItemData.PlaybackPositionTicks;
//                        cmd.Parameters.Add(cmd, "@lastPlayedDate", DbType.DateTime).Value = userItemData.LastPlayedDate;
//                        cmd.Parameters.Add(cmd, "@AudioStreamIndex", DbType.Int32).Value = userItemData.AudioStreamIndex;
//                        cmd.Parameters.Add(cmd, "@SubtitleStreamIndex", DbType.Int32).Value = userItemData.SubtitleStreamIndex;

//                        cmd.Transaction = transaction;

//                        cmd.ExecuteNonQuery();
//                    }

//                    cancellationToken.ThrowIfCancellationRequested();
//                }

//                transaction.Commit();
//            }
//            catch (OperationCanceledException)
//            {
//                if (transaction != null)
//                {
//                    transaction.Rollback();
//                }

//                throw;
//            }
//            catch (Exception e)
//            {
//                Logger.ErrorException("Failed to save user data:", e);

//                if (transaction != null)
//                {
//                    transaction.Rollback();
//                }

//                throw;
//            }
//            finally
//            {
//                if (transaction != null)
//                {
//                    transaction.Dispose();
//                }

//                WriteLock.Release();
//            }
//        }

//        /// <summary>
//        /// Gets the user data.
//        /// </summary>
//        /// <param name="userId">The user id.</param>
//        /// <param name="key">The key.</param>
//        /// <returns>Task{UserItemData}.</returns>
//        /// <exception cref="System.ArgumentNullException">
//        /// userId
//        /// or
//        /// key
//        /// </exception>
//        public UserItemData GetUserData(Guid userId, string key)
//        {
//            if (userId == Guid.Empty)
//            {
//                throw new ArgumentNullException("userId");
//            }
//            if (string.IsNullOrEmpty(key))
//            {
//                throw new ArgumentNullException("key");
//            }

//            using (var cmd = _connection.CreateCommand())
//            {
//                cmd.CommandText = "select key,userid,rating,played,playCount,isFavorite,playbackPositionTicks,lastPlayedDate,AudioStreamIndex,SubtitleStreamIndex from userdata where key = @key and userId=@userId";

//                cmd.Parameters.Add(cmd, "@key", DbType.String).Value = key;
//                cmd.Parameters.Add(cmd, "@userId", DbType.Guid).Value = userId;

//                using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
//                {
//                    if (reader.Read())
//                    {
//                        return ReadRow(reader);
//                    }
//                }

//                return null;
//            }
//        }

//        public UserItemData GetUserData(Guid userId, List<string> keys)
//        {
//            if (userId == Guid.Empty)
//            {
//                throw new ArgumentNullException("userId");
//            }
//            if (keys == null)
//            {
//                throw new ArgumentNullException("keys");
//            }

//            using (var cmd = _connection.CreateCommand())
//            {
//                var index = 0;
//                var userdataKeys = new List<string>();
//                var builder = new StringBuilder();
//                foreach (var key in keys)
//                {
//                    var paramName = "@Key" + index;
//                    userdataKeys.Add("Key =" + paramName);
//                    cmd.Parameters.Add(cmd, paramName, DbType.String).Value = key;
//                    builder.Append(" WHEN Key=" + paramName + " THEN " + index);
//                    index++;
//                    break;
//                }

//                var keyText = string.Join(" OR ", userdataKeys.ToArray());

//                cmd.CommandText = "select key,userid,rating,played,playCount,isFavorite,playbackPositionTicks,lastPlayedDate,AudioStreamIndex,SubtitleStreamIndex from userdata where userId=@userId AND (" + keyText + ") ";

//                cmd.CommandText += " ORDER BY (Case " + builder + " Else " + keys.Count.ToString(CultureInfo.InvariantCulture) + " End )";
//                cmd.CommandText += " LIMIT 1";

//                cmd.Parameters.Add(cmd, "@userId", DbType.Guid).Value = userId;

//                using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult | CommandBehavior.SingleRow))
//                {
//                    if (reader.Read())
//                    {
//                        return ReadRow(reader);
//                    }
//                }

//                return null;
//            }
//        }

//        /// <summary>
//        /// Return all user-data associated with the given user
//        /// </summary>
//        /// <param name="userId"></param>
//        /// <returns></returns>
//        public IEnumerable<UserItemData> GetAllUserData(Guid userId)
//        {
//            if (userId == Guid.Empty)
//            {
//                throw new ArgumentNullException("userId");
//            }

//            using (var cmd = _connection.CreateCommand())
//            {
//                cmd.CommandText = "select key,userid,rating,played,playCount,isFavorite,playbackPositionTicks,lastPlayedDate,AudioStreamIndex,SubtitleStreamIndex from userdata where userId=@userId";

//                cmd.Parameters.Add(cmd, "@userId", DbType.Guid).Value = userId;

//                using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess | CommandBehavior.SingleResult))
//                {
//                    while (reader.Read())
//                    {
//                        yield return ReadRow(reader);
//                    }
//                }
//            }
//        }

//        /// <summary>
//        /// Read a row from the specified reader into the provided userData object
//        /// </summary>
//        /// <param name="reader"></param>
//        private UserItemData ReadRow(IDataReader reader)
//        {
//            var userData = new UserItemData();

//            userData.Key = reader.GetString(0);
//            userData.UserId = reader.GetGuid(1);

//            if (!reader.IsDBNull(2))
//            {
//                userData.Rating = reader.GetDouble(2);
//            }

//            userData.Played = reader.GetBoolean(3);
//            userData.PlayCount = reader.GetInt32(4);
//            userData.IsFavorite = reader.GetBoolean(5);
//            userData.PlaybackPositionTicks = reader.GetInt64(6);

//            if (!reader.IsDBNull(7))
//            {
//                userData.LastPlayedDate = reader.GetDateTime(7).ToUniversalTime();
//            }

//            if (!reader.IsDBNull(8))
//            {
//                userData.AudioStreamIndex = reader.GetInt32(8);
//            }

//            if (!reader.IsDBNull(9))
//            {
//                userData.SubtitleStreamIndex = reader.GetInt32(9);
//            }

//            return userData;
//        }

//        protected override void Dispose(bool dispose)
//        {
//            // handled by library database
//        }

//        protected override void CloseConnection()
//        {
//            // handled by library database
//        }
//    }
//}