using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace XYLEM.Base.Files
{
    internal class PathTools
    {
        /// <summary>
        /// File path trunk
        /// </summary>
        /// <param name="dirPath"> ex. c:\mainDir\subDir\text.text</param>
        /// <param name="trunkLength"> ex. 12 char </param>
        /// <returns>  ex. will return "...\subDir\text.text" because "subDir\text.text" is > 12 </returns>
        public static string FilePathStartTrunk(string dirPath, int trunkLength)
        {
            try
            {
                if (!String.IsNullOrEmpty(dirPath) && (dirPath.Length > 40))
                { // if to big .. then trunk it
                    var pathSplits = dirPath.Split(new char[] { '\\' }, StringSplitOptions.RemoveEmptyEntries);
                    if (pathSplits.Length > 0)
                    { // are able to trunk
                        dirPath = "";
                        foreach (var item in pathSplits.Reverse())
                        {
                            dirPath = CombineDirAndFileSubPath(item, dirPath);
                            if (dirPath.Length > 40)
                            {
                                dirPath = CombineDirAndFileSubPath("...", dirPath);
                                break; // max length is now then just exit loop
                            }
                        }
                    }
                }
                return dirPath;
            }
            catch (Exception ex)
            {
                AppConst.Logger.AddFuncLog(true, "PathTools", "FilePathStartTrunk()", ex);
            }
            return "?";
        }

        /// <summary>
        /// Create the directory path
        /// </summary>
        /// <param name="dirPath"></param>
        /// <returns></returns>
        public static Boolean CreateDirPath(string dirPath)
        {
            try
            {
                // Determine whether the directory exists.
                if (Directory.Exists(dirPath))
                {
                    //That path exists already
                    return false;
                }

                // Try to create the directory.
                DirectoryInfo di = Directory.CreateDirectory(dirPath);
                return false;
            }
            catch
            {
                return true;
            }
        }

        /// <summary>
        /// Create the directory for a file path
        /// </summary>
        /// <param name="pathForFile"></param>
        /// <returns>return true on error</returns>
        public static bool CreateDirPathForFile(string pathForFile)
        {
            try
            {
                return CreateDirPath(GetDirPath(pathForFile));
            }
            catch
            {
                return true;
            }
        }

        /// <summary>
        /// Combine a directory path and sub path to a compleate path
        /// </summary>
        /// <param name="dirPath"></param>
        /// <param name="subFilePath"></param>
        /// <returns></returns>
        public static string CombineDirAndFileSubPath(string dirPath, string subFilePath)
        {
            dirPath = dirPath.Trim().EndsWith("\\") ?
                dirPath.Trim().Remove(dirPath.LastIndexOf("\\")) :
                dirPath.Trim();
            return Path.Combine(dirPath, subFilePath.Trim());
        }

        /// <summary>
        /// Get directory path
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns>return true on error</returns>
        public static string GetDirPath(string filePath)
        {
            return filePath.Remove(filePath.Trim().LastIndexOf("\\"));
        }
    }
}