using System;
using System.Data.SqlClient;
using System.Diagnostics;
using System.IO;
using System.Net.Mime;
using System.Threading;
using System.IO.Compression;

namespace ValheimBackupUtil
{
    internal class Program
    {
        private static int _interval;
        private static string sourcePath = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile) + @"\AppData\LocalLow\IronGate\Valheim\";
        private static string backupPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\ValheimBackups\";
        public static void Main(string[] args)
        {
            Console.WriteLine("This utility will only backup whenever you are currently playing.");
            Console.WriteLine("Your data will be saved in your Documents folder ({0})", backupPath);
            Console.WriteLine("How often would you like to backup? (in minutes)");
            string input = Console.ReadLine();
            if (int.TryParse(input, out var minutes)) //Check if input is an integer
            {
                _interval = minutes;
                Console.WriteLine("How long would you like to keep backups? (in days)");
                input = Console.ReadLine();

                if (int.TryParse(input, out var days)) //Check if input is an integer
                {
                    if (days == 0)
                    {
                        Console.WriteLine("Setting deletion rate to 0 instantly deletes the backups silly...");
                        Console.WriteLine("Defaulting to 2 day deletion");
                        days = 2;
                    }
                    backup(minutes*60000, days); //*60,000 bc Sleep function is in milliseconds
                                                                    //value of 1 = 1ms, value of 1*60,000 = 1 minute
                }
                else                          //input was not an integer.. cursed user
                {
                    Console.WriteLine("{0} is not a number...", input);
                    Console.WriteLine("Come back when you can think of one");
                    Console.WriteLine("geez");
                    Thread.Sleep(3000);
                    Environment.Exit(1);
                }
            }
            else                             //input was not an integer.. cursed user
            {
                Console.WriteLine("{0} is not a number...", input);
                Console.WriteLine("Come back when you can think of one");
                Console.WriteLine("geez");
                Thread.Sleep(3000);
                Environment.Exit(1);
            }


        }

        static void backup(int interval, int deleteCycle)
        {
            Console.Clear();
            Console.WriteLine("Backup interval: {0} minute(s)", _interval);
            Console.WriteLine("Backup deletion: {0} day(s)", deleteCycle);
            if (!Directory.Exists(backupPath))                  //if backup directory doesnt exist yet, make one real quick
                Directory.CreateDirectory(backupPath);

            while (true)
            {
                if (Process.GetProcessesByName("valheim").Length > 0)                                                 //checks if valheim is running
                {
                    string backupName = backupPath + "backup_"+DateTime.Now.ToString("MM.dd.yyyy_HH.mm");     //"backupName" is the path to the current datetime backup folder
                    Directory.CreateDirectory(backupName);                                                           //create said folder, it will not exist. time goes forward, but surely the user will break that too
                    Console.WriteLine("[<(*beep boop backup machine initialized*)>]");
                    CloneDirectory(sourcePath, backupName);                                              //the actual backup function
                    if(!Directory.Exists(backupName+".zip"))
                        ZipFile.CreateFromDirectory(backupName, backupName + ".zip");       //create zip from previous created backup

                    Directory.Delete(backupName, true);                                                   //delete backup folder, as we are preserving the zip

                    foreach (string file in Directory.GetFiles(backupPath))                                       //for each backup in backups folder
                    {
                        FileInfo fi = new FileInfo(file);                                                         //get the file info
                        if (fi.CreationTime < DateTime.Now.AddDays(-deleteCycle))                                 //if file is older than specified days
                        {
                            fi.Delete();                                                                          //delete that shit
                            Console.WriteLine("[<(*deleted old backup beep beep*)>]");
                        }
                    }

                    Console.WriteLine("[<(*{0} complete boop beep*)>]", backupName+".zip");
                    Console.WriteLine("[<(*taking a nap for {0} minute(s)*)>]", _interval);
                }
                else
                {
                    Console.WriteLine("Valheim is not currently running, checking again in {0} minute(s)", _interval);
                }
                Thread.Sleep(interval);
            }
        }

        static void CloneDirectory(string root, string dest)
        {
            if (Directory.Exists(root))                                                //make sure the valheim directory actually exists, dunno why it wouldnt though
            {
                foreach (var directory in Directory.GetDirectories(root))       //for each folder in valheim directory
                {
                    string dirName = Path.GetFileName(directory);                     //identify the folders name
                    if (!Directory.Exists(Path.Combine(dest, dirName)))
                    {
                        Directory.CreateDirectory(Path.Combine(dest, dirName));       //and create the same folder in the backup dir
                    }

                    CloneDirectory(directory, Path.Combine(dest, dirName)); //do this again, but checking inside of folders
                }

                foreach (var file in Directory.GetFiles(root))                   //for each individual file in valheim dir
                {
                    File.Copy(file, Path.Combine(dest, Path.GetFileName(file))); //copy to backup dir
                }
            }
            else
            {
                Console.WriteLine("oh fuck... valheim sourcepath is null or some shit brooooo");
            }
        }
    }
}