using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using GeneralApi.IntegrationUtility.Common;
using GeneralApi.IntegrationUtility.Infrastructure;
using log4net;
using Microsoft.Practices.ServiceLocation;
using Taloyhtio.GeneralApi.Common.DTO;
using Taloyhtio.GeneralApi.Common.Extensions;
using Taloyhtio.GeneralApi.IntegrationUtility.Common;
using Taloyhtio.GeneralApi.IntegrationUtility.Repositories;
using Taloyhtio.GeneralApi.IntegrationUtility.Services;

namespace GeneralApi.IntegrationUtility
{
    class Program
    {
        private static ILog logger;
        static void Main(string[] args)
        {
            IoCConfiguration.Configure();
            logger = ServiceLocator.Current.GetInstance<ILog>();
            try
            {
                var settingsProvider = ServiceLocator.Current.GetInstance<ISettingsProvider>();

                // for self signed certificates wwe need to ignore warning.
                // See http://weblogs.asp.net/smehaffie/archive/2009/09/10/calling-web-services-that-use-self-signed-certificates.aspx
                logger.Info("Determine should ignore SSL warnings or not...");
                var ignoreSSLWarn = settingsProvider.GetVal<bool>(Constants.Settings.IGNORE_SSL_WARNING_SETTING_KEY);
                if (ignoreSSLWarn.HasValue && ignoreSSLWarn.Value)
                {
                    logger.Info("SSL warnings are ignored");
                    ServicePointManager.ServerCertificateValidationCallback = (s, cert, c, p) => true;
                }
                else
                {
                    logger.Info("SSL warnings are not ignored");
                }

                string inputFolder = settingsProvider.Get<string>(Constants.Settings.INPUT_FOLDER_SETTING_KEY);
                if (string.IsNullOrEmpty(inputFolder))
                {
                    inputFolder = Constants.Common.DEFAULT_INPUT_FOLDER;
                    logger.WarnFormat("Input folder not found in the config file. Default folder '{0}' will be used", inputFolder);
                }
                logger.InfoFormat("Input folder is set to '{0}'", inputFolder);
                FileUtilities.EnsureFolderExists(inputFolder);

                string archiveFolder = settingsProvider.Get<string>(Constants.Settings.ARCHIVE_FOLDER_SETTING_KEY);
                if (string.IsNullOrEmpty(archiveFolder))
                {
                    archiveFolder = Constants.Common.DEFAULT_ARCHIVE_FOLDER;
                    logger.WarnFormat("Archive folder not found in the config file. Default folder '{0}' will be used", archiveFolder);
                }
                logger.InfoFormat("Archive folder is set to '{0}'", archiveFolder);
                FileUtilities.EnsureFolderExists(archiveFolder);

                // get all files from input folder
                var filesRepository = ServiceLocator.Current.GetInstance<IFileRepository>();
                var files = filesRepository.GetAllNew(inputFolder);
                if (files.IsNullOrEmpty())
                {
                    logger.InfoFormat("There is no files in '{0}' folder", inputFolder);
                    return;
                }
                logger.InfoFormat("Were found '{0}' file(s) in the folder '{1}'", files.Count, inputFolder);

                // filter matching files
                var filesFilter = ServiceLocator.Current.GetInstance<IFileFilter>();
                files = filesFilter.Filter(files);
                if (files.IsNullOrEmpty())
                {
                    logger.InfoFormat("There is no matching files in '{0}' folder", inputFolder);
                    return;
                }

                // sort files using date in file name
                var fileSorter = ServiceLocator.Current.GetInstance<IFileSorter>();
                files = fileSorter.Sort(files);
                if (files.IsNullOrEmpty())
                {
                    logger.InfoFormat("There is no matching sorted files in '{0}' folder", inputFolder);
                    return;
                }

                var condoFileProcessor = ServiceLocator.Current.GetInstance<IFileProcessor<Condo>>();
                var boardMemberFileProcessor = ServiceLocator.Current.GetInstance<IFileProcessor<BoardMember>>();
                foreach (string file in files)
                {
                    try
                    {
                        logger.InfoFormat("Start processing file '{0}'...", file);

                        var fileNameToLower = getFileNameToLower(file);

                        if (fileNameToLower.StartsWith(Constants.Common.CONDO_PREFIX.ToLower()))
                        {
                            processFile(condoFileProcessor, file);
                        }
                        else if (fileNameToLower.StartsWith(Constants.Common.BOARD_MEMBER_PREFIX.ToLower()))
                        {
                            processFile(boardMemberFileProcessor, file);
                        }
                        else
                        {
                            logger.WarnFormat("File '{0}' is unknown. It won't be processed", file);
                        }

                        logger.InfoFormat("Finish processing file '{0}'", file);
                    }
                    finally
                    {
                        bool? move = settingsProvider.GetVal<bool>(Constants.Settings.MOVE_FILES_TO_ARCHIVE_AFTER_PROCESSING);
                        if (move.HasValue && move.Value)
                        {
                            moveOrDelete(archiveFolder, filesRepository, file);
                        }
                    }
                }
            }
            catch (Exception x)
            {
                logger.FatalFormat(string.Format("{0}\n{1}", x.Message, x.StackTrace));
            }
        }

        private static string getFileNameToLower(string file)
        {
            if (string.IsNullOrEmpty(file))
            {
                return string.Empty;
            }

            file = Path.GetFileName(file);
            if (string.IsNullOrEmpty(file))
            {
                return string.Empty;
            }
            file = file.ToLower();

            return file;
        }

        private static void processFile<T>(IFileProcessor<T> processor, string file)
            where T : class
        {
            if (processor.ProcessFile(file))
            {
                logger.InfoFormat("Processing of the file '{0}' was sucessfully finished without errors", file);
            }
            else
            {
                logger.InfoFormat("Processing of the file '{0}' was finished with errors", file);
            }
        }

        private static void moveOrDelete(string archiveFolder, IFileRepository filesRepository, string file)
        {
            string newFilePath = Path.Combine(archiveFolder, Path.GetFileName(file));
            logger.InfoFormat("Moving file '{0}' to '{1}' location...", file, newFilePath);
            if (!filesRepository.Move(file, newFilePath))
            {
                string uniqueFileName = FileUtilities.AddCurrentTimeToFileName(Path.GetFileName(file));
                newFilePath = Path.Combine(archiveFolder, uniqueFileName);
                logger.InfoFormat("Second try: moving file '{0}' to '{1}' location...", file, newFilePath);
                if (!filesRepository.Move(file, newFilePath))
                {
                    // delete file in order to avoid duplicate processing
                    logger.ErrorFormat("Error occured during moving of file '{0}' to the new location", file);
                    logger.InfoFormat("Trying to delete file '{0}'...", file);
                    File.Delete(file);
                    logger.InfoFormat("File '{0}' was succcessfully deleted", file);
                }
                else
                {
                    logger.InfoFormat("File '{0}' was successfully moved to the '{1}'", file, newFilePath);
                }
            }
            else
            {
                logger.InfoFormat("File '{0}' was successfully moved to the '{1}'", file, newFilePath);
            }
        }
    }
}