using ServiceShared;

namespace ServiceInside.Service
{
    public class CleanUp
    {
        /// <summary>
        /// Flag for disposed
        /// </summary>
        private static bool _Disposed = false;

        /// <summary>
        /// Results database controller
        /// </summary>
        private static ServiceShared.Database.Controllers.Results _dbResults = null;
        private static ServiceShared.Database.Controllers.Traces _dbTraces = null;

        /// <summary>
        /// old days to cleanup data
        /// </summary>
        private static int _OldDays = 30;

        /// <summary>
        /// Log Path to clean old files
        /// </summary>
        private static string _LogPath = null;

        /// <summary>
        /// Flag for service first run
        /// </summary>
        private static bool FirstRun = true;

        /// <summary>
        /// Set disposed flag to the CleanUp Service to stop background thread
        /// </summary>
        /// <param name="disposed"></param>
        public static void SetDisposed(bool disposed)
        {
            _Disposed = disposed;
        }

        /// <summary>
        /// Sets database controllers to the CleanUp Service
        /// </summary>
        /// <param name="dbResults">Database.Controllers.Results?</param>
        /// <param name="dbTraces">Database.Controllers.Traces?</param>
        public static void SetDbContext(ServiceShared.Database.Controllers.Results dbResults, ServiceShared.Database.Controllers.Traces dbTraces)
        {
            _dbResults = dbResults;
            _dbTraces = dbTraces;
        }

        /// <summary>
        /// Sets old days for CleanUp Service
        /// </summary>
        /// <param name="oldDays">number of old days</param>
        public static void SetOldDays(int oldDays = 30, string logPath = null)
        {
            _OldDays = oldDays;
            _LogPath = logPath;
        }

        /// <summary>
        /// Clean up old data in background
        /// </summary>
        public static void CleanUpInBackground()
        {
            try
            {
                if (_dbResults != null && _dbTraces != null && !_Disposed)
                {
                    Thread thread = new Thread(() =>
                    {
                        while (!_Disposed)
                        {
                            // Cleanup in the night up between 02:00 - 03:00
                            if (DateTime.Now.Hour == 2 || FirstRun)
                            {
                                FirstRun = false;

                                Log.Info("CleanUp Database");
                                _dbResults.CleanUp(_OldDays);

                                Log.Info("CleanUp files");

                                if(!string.IsNullOrEmpty(_LogPath))
                                {
                                    Log.Info("CleanUp log files at " + _LogPath);

                                    /** delete public files **/
                                    string[] logFiles = Directory.GetFiles(_LogPath, "*.log");

                                    if (logFiles != null && logFiles.Length > 0)
                                    {
                                        foreach (string file in logFiles)
                                        {
                                            DateTime nowTime = DateTime.Now;
                                            DateTime createdTime = File.GetCreationTime(file);
                                            int days = (int)(nowTime - createdTime).TotalDays;

                                            if (days > _OldDays)
                                            {
                                                File.Delete(file);
                                            }
                                        }
                                    }

                                }

                                /** delete public files **/
                                string[] publicFiles = Directory.GetFiles(BackgroundWorker.GetPublicDirectory());

                                if (publicFiles != null && publicFiles.Length > 0)
                                {
                                    foreach (string file in publicFiles)
                                    {
                                        DateTime nowTime = DateTime.Now;
                                        DateTime createdTime = File.GetCreationTime(file);
                                        int days = (int)(nowTime - createdTime).TotalDays;

                                        if (days > _OldDays)
                                        {
                                            File.Delete(file);
                                        }
                                    }
                                }

                                /** delete private files **/
                                string[] privateFiles = Directory.GetFiles(BackgroundWorker.GetPrivateDirectory());

                                if (privateFiles != null && privateFiles.Length > 0)
                                {
                                    foreach (string file in privateFiles)
                                    {
                                        DateTime nowTime = DateTime.Now;
                                        DateTime createdTime = File.GetCreationTime(file);
                                        int days = (int)(nowTime - createdTime).TotalDays;

                                        if (days > _OldDays)
                                        {
                                            File.Delete(file);
                                        }
                                    }
                                }

                                /** delete ack files **/
                                string[] ackFiles = Directory.GetFiles(BackgroundWorker.GetPrivateDirectoryAck());

                                if (ackFiles != null && ackFiles.Length > 0)
                                {
                                    foreach (string file in ackFiles)
                                    {
                                        DateTime nowTime = DateTime.Now;
                                        DateTime createdTime = File.GetCreationTime(file);
                                        int days = (int)(nowTime - createdTime).TotalDays;

                                        if (days > _OldDays)
                                        {
                                            File.Delete(file);
                                        }
                                    }
                                }

                                /** delete ack done files **/
                                string[] ackDoneFiles = Directory.GetFiles(BackgroundWorker.GetPrivateDirectoryAckDone());

                                if (ackDoneFiles != null && ackDoneFiles.Length > 0)
                                {
                                    foreach (string file in ackDoneFiles)
                                    {
                                        DateTime nowTime = DateTime.Now;
                                        DateTime createdTime = File.GetCreationTime(file);
                                        int days = (int)(nowTime - createdTime).TotalDays;

                                        if (days > _OldDays)
                                        {
                                            File.Delete(file);
                                        }
                                    }
                                }
                            }

                            Thread.Sleep((((1000 * 60) * 3600))); // one hour cpu sleep
                        }
                    });

                    thread.Start();
                }
            }
            catch (Exception ex)
            {
                Log.Error(ex, "ServiceInside.Service.CleanUp", "CleanUpInBackground");
            }
        }
    }
}