using System;
using System.IO;
using System.Linq;

namespace PKHeX
{
    public partial class Util
    {
        internal static string GetTempFolder()
        {
            return Path.Combine(Path.GetTempPath(), "3DSSE");
        }
        internal static string GetCacheFolder()
        {
            return Path.Combine(GetBackupLocation(), "cache");
        }
        internal static string GetRegistryValue(string key)
        {
            Microsoft.Win32.RegistryKey currentUser = Microsoft.Win32.Registry.CurrentUser;
            Microsoft.Win32.RegistryKey key3 = currentUser.OpenSubKey(GetRegistryBase());
            if (key3 == null)
                return null;

            string str = key3.GetValue(key) as string;
            key3.Close();
            currentUser.Close();
            return str;
        }
        internal static string GetRegistryBase()
        {
            return @"SOFTWARE\CYBER Gadget\3DSSaveEditor";
        }
        internal static string GetBackupLocation()
        {
            string registryValue = GetRegistryValue("Location");
            if (!string.IsNullOrEmpty(registryValue))
            {
                Directory.CreateDirectory(registryValue);
                return registryValue;
            }
            string path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), "3DSSaveBank");
            Directory.CreateDirectory(path);
            return path;
        }
        internal static string get3DSLocation()
        {
            try
            {
                string[] DriveList = Environment.GetLogicalDrives();
                for (int i = 1; i < DriveList.Length; i++) // Skip first drive (some users still have floppy drives and would chew up time!)
                {
                    string potentialPath = Path.Combine(DriveList[i], "Nintendo 3DS");
                    if (Directory.Exists(potentialPath))
                        return potentialPath;
                }
            }
            catch { }
            return null;
        }
        internal static string CleanFileName(string fileName)
        {
            return Path.GetInvalidFileNameChars().Aggregate(fileName, (current, c) => current.Replace(c.ToString(), string.Empty));
        }
        internal static string TrimFromZero(string input)
        {
            int index = input.IndexOf('\0');
            return index < 0 ? input : input.Substring(0, index);
        }
    }
}