using GPW.CORE.Data.DbModels;
using System.Security.Cryptography;
using System.Text;

namespace GPW.CORE.Data
{
    /// <summary>
    /// Classe validazione valori
    /// </summary>
    public class DataValidator
    {
        #region Public Constructors

        public DataValidator(DipendentiModel? currRigaDip)
        {
            rigaDip = currRigaDip;
        }

        #endregion Public Constructors

        #region Public Properties

        /// <summary>
        /// Restituisce HASH del codice impiego = payload utente
        /// </summary>
        /// <returns></returns>
        public string HashDip
        {
            get => calcHashDip;
        }

        #endregion Public Properties

        #region Public Methods

        /// <summary>
        /// Calcolo Hash data stringa input
        /// </summary>
        /// <param name="rawData"></param>
        /// <returns></returns>
        public static string CalcHash(string rawData)
        {
            string hash = "";
            // hashing!
            using (var md5 = MD5.Create())
            {
                byte[] InputBytes = Encoding.UTF8.GetBytes(rawData);
                var byteHash = md5.ComputeHash(InputBytes);
                hash = BitConverter.ToString(byteHash).Replace("-", "").ToLowerInvariant();
            }
            return hash;
        }

        #endregion Public Methods

        #region Private Fields

        private DipendentiModel? rigaDip = null;

        #endregion Private Fields

        #region Private Properties

        /// <summary>
        /// Calcola HASH del codice impiego = payload utente
        /// </summary>
        /// <returns></returns>
        private string calcHashDip
        {
            get
            {
                string hash = "";
                string buffData = "";
                if (rigaDip != null)
                {
                    buffData = $"{rigaDip.IdxDipendente}|{rigaDip.Cognome}.{rigaDip.Nome}|{rigaDip.Cf}|{rigaDip.DataAssunzione:yyyyMMdd}|{rigaDip.Email}|{rigaDip.Matricola}";
                }
                if (!string.IsNullOrEmpty(buffData))
                {
                    hash = CalcHash(buffData);
#if false
                    // hashing!
                    using (var md5 = MD5.Create())
                    {
                        byte[] InputBytes = Encoding.UTF8.GetBytes(buffData);
                        var byteHash = md5.ComputeHash(InputBytes);
                        hash = BitConverter.ToString(byteHash).Replace("-", "").ToLowerInvariant();
                    }
#endif
                }
                return hash;
            }
        }

        #endregion Private Properties
    }
}