using DatenDB;
using Npgsql;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web.UI.WebControls;

namespace Deckungsbeitrag.AA_Klassen
{
  internal class Saison
  {
    public const string COLUMNS = "saison_id, bezeichnung, start_date, end_date, aktiv";
    private const string TABLE = "kundenverwaltung.saison";

    public static Saison GetAktivSaison()
    {
      DatenbankConnection.GetConnection().Open();
      Saison saison = null;
      using (NpgsqlCommand command = new NpgsqlCommand())
      {
        command.Connection = DatenbankConnection.GetConnection();

        command.CommandText = $"select {COLUMNS} from {TABLE} where aktiv = {true}";

        NpgsqlDataReader reader = command.ExecuteReader();
        while (reader.Read()) saison = new Saison(reader);
        reader.Close();
      }
      DatenbankConnection.GetConnection().Close();

      return saison;
    }
    public static List<Saison> LadeSaisons()
    {
      DatenbankConnection.GetConnection().Open();
      List<Saison> resultList = new List<Saison>();
      NpgsqlCommand command = new NpgsqlCommand();
      command.Connection = DatenbankConnection.GetConnection();
      command.CommandText = $"select {COLUMNS} from {TABLE} order by bezeichnung";
      NpgsqlDataReader reader = command.ExecuteReader();
      while (reader.Read()) resultList.Add(new Saison(reader));
      reader.Close();
      DatenbankConnection.GetConnection().Close();
      return resultList;
    }

    public Saison(NpgsqlDataReader reader)
    {
      this.SaisonId = reader.GetInt32(0);
      this.Bezeichnung = reader.GetString(1);
      this.StartDatum = reader.IsDBNull(2) ? (DateTime?)null : reader.GetDateTime(2);
      this.EndDatum = reader.IsDBNull(3) ? (DateTime?)null : reader.GetDateTime(3);
      this.Aktiv = reader.GetBoolean(4);
    }


    public int? SaisonId { get; set; }
    public string Bezeichnung { get; set; }
    public bool Aktiv { get; set; }
    public DateTime? StartDatum { get; set; }
    public DateTime? EndDatum { get; set; }

    public override string ToString() => Bezeichnung;

    public int Save()
    {
      DatenbankConnection.GetConnection().Open();

      NpgsqlCommand command = new NpgsqlCommand();
      command.Connection = DatenbankConnection.GetConnection();

      if (this.SaisonId.HasValue & this.SaisonId != 0)
      {
        command.CommandText = $"update {TABLE} set bezeichnung = :p1, start_date = :p2, end_date = :p3, aktiv = :p4 where saison_id = :p0";
      }
      else
      {
        command.CommandText = "select nextval('kundenverwaltung.saison_seq')";
        this.SaisonId = (int)(long)command.ExecuteScalar();
        command.CommandText = $"insert into {TABLE} ({COLUMNS}) values (:p0, :p1, :p2, :p3, :p4)";
      }

      command.Parameters.AddWithValue("p0", this.SaisonId);
      command.Parameters.AddWithValue("p1", this.Bezeichnung);
      command.Parameters.AddWithValue("p2", this.StartDatum.HasValue ? this.StartDatum.Value : (object)DBNull.Value);
      command.Parameters.AddWithValue("p3", this.EndDatum.HasValue ? this.EndDatum.Value : (object)DBNull.Value);
      command.Parameters.AddWithValue("p4", this.Aktiv);

      int result = command.ExecuteNonQuery();
      DatenbankConnection.GetConnection().Close();
      return result;
    }

  }
}