using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace MergeCMInpro.Business
{
    public class Vorgang
    {
        #region Fields
        private string aktenzeichen;
        #endregion

        #region Properties

        public string VorgangsDefinition { get; set; }

        public int Id { get; set; }

        public string Aktenzeichen
        {
            get
            {
                return aktenzeichen;
            }
            set
            {
                aktenzeichen = value;
                if (!aktenzeichen.Contains("/"))
                {
                    aktenzeichen = ReplaceHiphenWithSlash(value);
                }
            }
        }

        public string FameId { get; set; }

        public string DocType { get; set; }

        public string NamePDF { get; set; }

        public static Dictionary<int, string> Strassen { get; set; }

        public string Strasse1 { get; set; }

        public string Teil { get; set; }

        public string Hausnummer1 { get; set; }

        public string Strasse2 { get; set; } = string.Empty;

        public string Hausnummer2 { get; set; } = string.Empty;

        public string AbsoluteFilePath { get; set; }

        public DateTime CreationDate { get; set; }

        public DateTime Enddatum { get; set; }

        #endregion Properties                

        #region Constructor

        public Vorgang(string id, string aktenzeichen, string docType, string teil, string namePDF, string strasse1, string hausnummer1)
        {
            this.DocType = docType;
            this.Teil = teil;
            this.Aktenzeichen = aktenzeichen;
            this.NamePDF = namePDF;
            this.Id = Convert.ToInt32(id);
            this.FameId = GenerateFameId();
            this.Strasse1 = strasse1;
            this.Hausnummer1 = hausnummer1;
        }

        public Vorgang(string id, string aktenzeichen, string docType, string teil, string namePDF)
        {
            this.DocType = docType;
            this.Teil = teil;
            this.Aktenzeichen = aktenzeichen;
            this.NamePDF = namePDF;
            this.Id = Convert.ToInt32(id);
            this.FameId = GenerateFameId();
        }

        public Vorgang()
        {

        }
        #endregion

        #region Methods
        string ReplaceHiphenWithSlash(string aktenzeichen)
        {
            var regex = new Regex(Regex.Escape("-"));
            string res = regex.Replace(aktenzeichen, "/", 1);
            return res;
        }

        protected string GenerateFameId()
        {
            string dt = DateTime.Now.ToString("ddMMyyhhmmssfff");
            byte[] tmpDt;
            byte[] tmpHash;

            tmpDt = ASCIIEncoding.ASCII.GetBytes(dt);
            tmpHash = new MD5CryptoServiceProvider().ComputeHash(tmpDt);

            StringBuilder res = new StringBuilder(tmpHash.Length);
            for (int i = 0; i < tmpHash.Length; i++)
            {
                res.Append(tmpHash[i].ToString("X2"));
            }
            string tmp = res.ToString().ToLower().Substring(res.Length - 12);

            return tmp;
        }

        public virtual string GenerateVorgang(Vorgang v)
        {
            return String.Empty;
        }

        protected string GenerateLangbezeichnungFromPath(string path)
        {
            var temp = path.Split('\\').SkipLast(2).LastOrDefault().Split(' ').Skip(3);
            string result = string.Concat(temp.ElementAt(0), " ", temp.ElementAt(1), " ", temp.ElementAt(2), " Datensatz ");

            //#region TESTING
            //string testing = "TEST";
            //string result = testing;
            //#endregion

            return result;
        }
        #endregion
    }
}