using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using log4net;
using Microsoft.Practices.ServiceLocation;
using Taloyhtio.GeneralApi.Common.Extensions;
using Taloyhtio.GeneralApi.IntegrationUtility.Common;

namespace Taloyhtio.GeneralApi.IntegrationUtility.Repositories.Impl
{
    public class FileRepository : IFileRepository
    {
        private ILog logger = ServiceLocator.Current.GetInstance<ILog>();

//        private class Comparer : IComparer<FileInfo>
//        {
//            public int Compare(FileInfo x, FileInfo y)
//            {
//                return DateTime.Compare(x.LastWriteTime, y.LastWriteTime);
//            }
//        }

        public List<string> GetAllNew(string folderPath)
        {
            try
            {
                if (string.IsNullOrEmpty(folderPath))
                {
                    return new List<string>();
                }
                // 2010-06-11: it is important to get files in last write date order
                return Directory.GetFiles(folderPath).ToList();
//                var dirInfo = new DirectoryInfo(folderPath);
//                var files = dirInfo.GetFiles();
//                if (files.IsNullOrEmpty())
//                {
//                    return new List<string>();
//                }
//                Array.Sort(files, new Comparer());
//                return files.Select(f => f.FullName).ToList();
            }
            catch (Exception x)
            {
                this.logger.ErrorFormat(string.Format("{0}\n{1}", x.Message, x.StackTrace));
                return new List<string>();
            }
        }

        public string GetContent(string fileName)
        {
            try
            {
                if (string.IsNullOrEmpty(fileName))
                {
                    return null;
                }
                if (!File.Exists(fileName))
                {
                    return null;
                }
                return File.ReadAllText(fileName);
            }
            catch (Exception x)
            {
                this.logger.ErrorFormat(string.Format("{0}\n{1}", x.Message, x.StackTrace));
                return null;
            }
        }

        public bool Move(string targetPath, string destPath)
        {
            try
            {
                if (string.IsNullOrEmpty(targetPath))
                {
                    this.logger.ErrorFormat("Target path is null or empty");
                    return false;
                }
                if (string.IsNullOrEmpty(destPath))
                {
                    this.logger.ErrorFormat("Destination path is null or empty");
                    return false;
                }
                if (!File.Exists(targetPath))
                {
                    this.logger.ErrorFormat("Target file '{0}' not found", targetPath);
                    return false;
                }
                if (File.Exists(destPath))
                {
                    this.logger.ErrorFormat("Destination file '{0}' with the same name alreayd exists", destPath);
                    return false;
                }
                string destDir = Path.GetDirectoryName(destPath);
                FileUtilities.EnsureFolderExists(destDir);
                File.Move(targetPath, destPath);
                return true;
            }
            catch (Exception x)
            {
                this.logger.ErrorFormat(string.Format("Error occured during moving of file '{0}' to '{1}':\n{2}\n{3}",
                    destPath, targetPath, x.Message, x.StackTrace));
                return false;
            }
        }
    }
}