using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using NLog;

namespace ETS_Data
{
    /// <summary>
    /// classe gestione files
    /// </summary>
    public class fileMover
    {
        #region inizializzazione

        /// <summary>
        /// oggetto static per fare chiamate sul magazzino
        /// </summary>
        public static fileMover obj = new fileMover();

        protected Logger lg = LogManager.GetCurrentClassLogger();

        #endregion

        /// <summary>
        /// restituisce una tab di files dato l'elenco dei files
        /// </summary>
        /// <param name="_files"></param>
        /// <returns></returns>
        public static DS_utils.filesDataTable tabellaFiles(FileInfo[] _files)
        {
            DS_utils.filesDataTable _dsEF = new DS_utils.filesDataTable();
            DS_utils.filesRow _riga;
            foreach (FileInfo _fi in _files)
            {
                _riga = _dsEF.NewfilesRow();
                _riga.dataCreaz = _fi.CreationTime;
                _riga.dataMod = _fi.LastWriteTime;
                _riga.Nome = _fi.Name;
                _riga.size = _fi.Length / 1000;
                _dsEF.AddfilesRow(_riga);
            }
            return _dsEF;
        }
        /// <summary>
        /// restituisce una tab di files contenuti nel path da analizzare
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static DS_utils.filesDataTable tabellaFiles(string path)
        {
            return tabellaFiles(elencoFile(path));
        }
        /// <summary>
        /// restituisce l'elenco dei files in una data cartella
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static FileInfo[] elencoFile(string path)
        {
            FileInfo[] answ;
            try
            {
                DirectoryInfo di = checkDir(path);
                answ = di.GetFiles();
            }
            catch
            {
                answ = null;
            }
            return answ;
        }
        /// <summary>
        /// verifica esistenza directory, eventualmente crea e restituisce controllo DirectoryInfo
        /// </summary>
        /// <param name="dirPath"></param>
        /// <returns></returns>
        public static DirectoryInfo checkDir(string dirPath)
        {
            Logger lg = LogManager.GetCurrentClassLogger();
            DirectoryInfo _di = null;
            try
            {
                _di = new DirectoryInfo(System.Web.HttpContext.Current.Server.MapPath(dirPath));
                if (!_di.Exists)
                {
                    _di.Create();
                }
            }
            catch (Exception exc)
            {
                lg.ErrorException("Errore in determinazione mapPath: {0}", exc);
            }
            return _di;
        }/// <summary>
        /// verifica possibilità di creazione file (se non c'è lo crea e lo distrugge)
        /// </summary>
        /// <param name="dirPath"></param>
        /// <returns></returns>
        public static bool fileCouldExist(string filePath)
        {
            bool answ = false;
            Logger lg = LogManager.GetCurrentClassLogger();
            FileInfo _fi = null;
            try
            {
                _fi = new FileInfo(System.Web.HttpContext.Current.Server.MapPath(filePath));
                if (_fi.Exists)
                {
                    answ = true;
                }
                else
                {
                    // creo
                    FileStream fs= _fi.Create();
                    fs.Close();
                    _fi.Delete();
                    answ = true;
                }
            }
            catch (Exception exc)
            {
                lg.ErrorException("Errore in determinazione possibilità esistenza file: {0}", exc);
            }
            return answ;
        }
        /// <summary>
        /// elimina un file dato path e nomefile
        /// </summary>
        /// <param name="Path"></param>
        /// <param name="Original_Nome"></param>
        /// <returns></returns>
        public bool eliminaFile(string Path, string Original_Nome)
        {
            bool answ = false;
            try
            {
                //elimino file!
                string filePath = string.Format("{0}\\{1}", Path, Original_Nome);
                FileInfo _fi = new FileInfo(System.Web.HttpContext.Current.Server.MapPath(filePath));
                _fi.Delete();
                lg.Info("Eliminazione file: {0}/{1}", Path, Original_Nome);
                answ = true;
            }
            catch
            { }
            return answ;
        }
        /// <summary>
        /// elimina un file dato path completo del file
        /// </summary>
        /// <param name="fileFullPath"></param>
        /// <returns></returns>
        public bool eliminaFile(string fileFullPath)
        {
            bool answ = false;
            try
            {
                //elimino file!
                FileInfo _fi = new FileInfo(System.Web.HttpContext.Current.Server.MapPath(fileFullPath));
                _fi.Delete();
                lg.Info("Eliminazione file: {0}", fileFullPath);
                answ = true;
            }
            catch
            { }
            return answ;
        }
#if false
        /// <summary>
        /// elimina i file dato path
        /// </summary>
        /// <param name="Path"></param>
        /// <param name="Original_Nome"></param>
        /// <returns></returns>
        public bool svuotaDirTemp(string Path)
        {
            bool answ = false;
            try
            {
                // verifico che il path contenga "TempUploads"...
                if (Path.IndexOf("TempUploads") >= 0)
                {
                    DirectoryInfo _di = new DirectoryInfo(System.Web.HttpContext.Current.Server.MapPath(Path));
                    if (_di.Exists)
                    {
                        // elimino directory (ricorsiva)
                        _di.Delete(true);
                        lg.Info("Eliminazione directory: {0}", Path);
                    }
                    // la (ri)creo
                    _di.Create();
                    lg.Info("Ricreata directory file: {0}", Path);
                    answ = true;
                }
            }
            catch
            { }
            return answ;
        } 
#endif
        /// <summary>
        /// sposta il file da From a To...
        /// </summary>
        /// <param name="_pathFrom"></param>
        /// <param name="_pathTo"></param>
        /// <param name="_nomeFile"></param>
        /// <param name="deleteOrig">determina se fare DAVVERO MOVE (cancella file origine) o solo copy (niente cancellazione file origine)</param>
        /// <returns></returns>
        public bool muoviFile(string _pathFrom, string _pathTo, string _nomeFile, bool deleteOrig)
        {
            bool fatto = false;
            // verifica directory
            checkDir(_pathFrom);
            checkDir(_pathTo);
            string filePathFrom = string.Format("{0}/{1}", _pathFrom, _nomeFile).Replace("//", "/");
            string filePathTo = string.Format("{0}/{1}", _pathTo, _nomeFile).Replace("//", "/");
            FileInfo _fi = new FileInfo(System.Web.HttpContext.Current.Server.MapPath(filePathFrom));
            try
            {
                _fi.CopyTo(System.Web.HttpContext.Current.Server.MapPath(filePathTo), true);
                if (deleteOrig)
                {
                    _fi.Delete();
                }
                fatto = true;
            }
            catch (Exception e)
            {
                lg.ErrorException("Eccezione in spostamento file!", e);
            }
            return fatto;
        }
        /// <summary>
        /// sposta il file da From a To...
        /// </summary>
        /// <param name="_pathFrom"></param>
        /// <param name="_pathTo"></param>
        /// <param name="_nomeFileFrom"></param>
        /// <param name="_nomeFileTo"></param>
        /// <param name="deleteOrig">determina se fare DAVVERO MOVE (cancella file origine) o solo copy (niente cancellazione file origine)</param>
        /// <returns></returns>
        public bool muoviFile(string _pathFrom, string _pathTo, string _nomeFileFrom, string _nomeFileTo, bool deleteOrig)
        {
            bool fatto = false;
            // verifica directory
            checkDir(_pathFrom);
            checkDir(_pathTo);
            string filePathFrom = string.Format("{0}/{1}", _pathFrom, _nomeFileFrom).Replace("//", "/");
            string filePathTo = string.Format("{0}/{1}", _pathTo, _nomeFileTo).Replace("//", "/");
            FileInfo _fi = new FileInfo(System.Web.HttpContext.Current.Server.MapPath(filePathFrom));
            try
            {
                _fi.CopyTo(System.Web.HttpContext.Current.Server.MapPath(filePathTo), true);
                if (deleteOrig)
                {
                    _fi.Delete();
                }
                fatto = true;
            }
            catch (Exception e)
            {
                lg.ErrorException("Eccezione in spostamento file!", e);
            }
            return fatto;
        }
        /// <summary>
        /// sposta il file da From a To...
        /// </summary>
        /// <param name="_pathFrom"></param>
        /// <param name="_pathTo"></param>
        /// <param name="_nomeFile"></param>
        /// <returns></returns>
        public bool muoviFile(string _pathFrom, string _pathTo, string _nomeFile)
        {
            bool fatto = muoviFile(_pathFrom, _pathTo, _nomeFile, true);
            return fatto;
        }

    }
}