using Microsoft.Extensions.Configuration;
using NLog;

namespace EgwCoreLib.Lux.Data.Services.General
{
    /// <summary>
    /// Gestione IO File-based
    /// </summary>
    public class FileService : IFileService
    {
        #region Public Constructors

        public FileService(IConfiguration config)
        {
            _config = config;
            basePath = _config.GetValue<string>("ServerConf:FileSharePath") ?? "unsafe_uploads";
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Eliminazione file (old)
        /// </summary>
        /// <param name="secureName">Nome secure da impiegare</param>
        /// <param name="content">Contenuto file</param>
        public bool DeleteOldFile(string folderPath, string secureName)
        {
            bool answ = false;
            if (!string.IsNullOrEmpty(folderPath))
            {
                // calcolo path file...
                string filePath = Path.Combine(basePath, folderPath, secureName);
                // se esiste...
                if (File.Exists(filePath))
                {
                    File.Delete(filePath);
                }
            }
            return answ;
        }

        /// <summary>
        /// Restituisce il contenuto del file salvato
        /// </summary>
        /// <param name="folderPath"></param>
        /// <param name="secureName"></param>
        /// <returns></returns>
        public string LoadFileContent(string folderPath, string secureName)
        {
            string answ = "";
            if (!string.IsNullOrEmpty(folderPath))
            {
                try
                {
                    // calcolo path file...
                    string filePath = Path.Combine(basePath, folderPath, secureName);
                    if (File.Exists(filePath))
                    {
                        answ = File.ReadAllText(filePath);
                    }
                }
                catch (Exception exc)
                {
                    Log.Error($"Exception on LoadFileContent{Environment.NewLine}{exc}");
                }
            }
            return answ;
        }

        /// <summary>
        ///  Esegue salvataggio del file ricevuto path, securename e content
        /// </summary>
        /// <param name="folderPath">Path relativo x file (tipicamente UID parent order)</param>
        /// <param name="secureName">Nome secure da impiegare</param>
        /// <param name="content">Contenuto file</param>
        public bool SaveFileContent(string folderPath, string secureName, string content)
        {
            bool answ = false;
            if (!string.IsNullOrEmpty(folderPath))
            {
                // calcolo path file...
                string filePath = Path.Combine(basePath, folderPath, secureName);
                string? directoryPath = Path.GetDirectoryName(filePath);
                try
                {
                    if (!string.IsNullOrEmpty(directoryPath))
                    {
                        Directory.CreateDirectory(directoryPath);
                    }
                    File.WriteAllText(filePath, content);
                }
                catch (Exception exc)
                {
                    Log.Error($"Exception on SaveFileContent{Environment.NewLine}{exc}");
                }
            }
            return answ;
        }

        /// <summary>
        ///  Esegue salvataggio del file ricevuto path, securename e content
        /// </summary>
        /// <param name="folderPath">Path relativo x file (tipicamente UID parent order)</param>
        /// <param name="secureName">Nome secure da impiegare</param>
        /// <param name="content">Contenuto file</param>
        public async Task<bool> SaveFileContentAsync(string folderPath, string secureName, string content)
        {
            bool answ = false;
            if (!string.IsNullOrEmpty(folderPath))
            {
                // calcolo path file...
                string filePath = Path.Combine(basePath, folderPath, secureName);
                string? directoryPath = Path.GetDirectoryName(filePath);
                try
                {
                    if (!string.IsNullOrEmpty(directoryPath))
                    {
                        Directory.CreateDirectory(directoryPath);
                    }
                    await File.WriteAllTextAsync(filePath, content);
                }
                catch (Exception exc)
                {
                    Log.Error($"Exception on SaveFileContentAsync{Environment.NewLine}{exc}");
                }
            }
            return answ;
        }

        /// <summary>
        /// Effettua salvataggio di un ContentStream generico (non semplice string)
        /// </summary>
        /// <param name="folderPath"></param>
        /// <param name="secureName"></param>
        /// <param name="contentStream"></param>
        /// <returns></returns>
        public async Task<bool> SaveFileStreamAsync(string folderPath, string secureName, Stream contentStream)
        {
            bool answ = false;

            if (string.IsNullOrEmpty(folderPath))
                return false;

            string filePath = Path.Combine(basePath, folderPath, secureName);
            string? directoryPath = Path.GetDirectoryName(filePath);

            try
            {
                if (!string.IsNullOrEmpty(directoryPath))
                    Directory.CreateDirectory(directoryPath);

                using var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None);
                await contentStream.CopyToAsync(fileStream);
                answ = true;
            }
            catch (Exception exc)
            {
                Log.Error($"Exception on SaveFileStreamAsync{Environment.NewLine}{exc}");
            }

            return answ;
        }

        #endregion Public Methods

        #region Private Fields

        private static Logger Log = LogManager.GetCurrentClassLogger();
        private IConfiguration _config;

        /// <summary>
        /// Base path x network share files
        /// </summary>
        private string basePath = "unsafe_uploads";

        #endregion Private Fields
    }
}