using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;

namespace MrAG
{
    public class Checksum
    {
		//
        // "This is like FABFUKAU(*W(&!@*JKHDHD"
		//
		//                                        - Bromvlieg
		//

        //
        // "Cool story, bro."
        //
        //                                        - Angelo
        //
		
        public class FileInfo{
            public string Path;
            public string Hash;
            public string LastWritten;
            public string LastAccessed;
            public string DateCreated;

            public long Size;

            public FileInfo(){}
            public FileInfo(string path){
                FileInfo f = MrAG.Checksum.GetInfo(path);

                this.Hash = f.Hash;
                this.Path = f.Path;
                this.LastWritten = f.LastWritten;
                this.LastAccessed = f.LastWritten;
                this.DateCreated = f.DateCreated;
                this.Size = f.Size;
            }
        }

        public static FileInfo GetInfo(string Filename){
            FileInfo f = new FileInfo();

            System.IO.FileInfo Fileinfo = new System.IO.FileInfo(Filename);

            f.Hash = MrAG.Checksum.FileHash(Filename);

            f.DateCreated = Fileinfo.CreationTimeUtc.ToString();
            f.LastAccessed = Fileinfo.LastAccessTimeUtc.ToString();
            f.LastWritten = Fileinfo.LastWriteTimeUtc.ToString();
            f.Size = Fileinfo.Length;

            
            return f;
        }

        public static String FileHash(String Filename)
        {
            FileStream File = new FileStream(Filename, FileMode.Open);
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] RetVal = md5.ComputeHash(File);
            File.Close();

            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < RetVal.Length; i++)
                sb.Append(RetVal[i].ToString("x2"));

            return sb.ToString().ToLower();
        }
    }
}