using System.Xml.Serialization;
using Microsoft.Data.Sqlite;
Console.WriteLine("Willkommen zu Aufgabe13");


List<Vertreter> vertreterListe;
XmlSerializer serializer = new XmlSerializer(typeof(List<Vertreter>));
using (var stream = new FileStream(@".\vertreter.xml", FileMode.Open))
{
    vertreterListe = (List<Vertreter>)serializer.Deserialize(stream);
}

using (var connection = new SqliteConnection("Data Source=sales.db3"))
{
    connection.Open();

    InsertDataIfNotExists(connection, vertreterListe);

    PrintAllData(connection);
}



void InsertDataIfNotExists(SqliteConnection connection, List<Vertreter> vertreterList)
{
    string insertQuery = @"
            INSERT OR IGNORE INTO Vertreter (Vorname, Nachname, Firma, Gebiet, Umsatz)
            VALUES (@Vorname, @Nachname, @Firma, @Gebiet, @Umsatz)";

    using (var transaction = connection.BeginTransaction())
    {
        foreach (var vertreter in vertreterList)
        {
            using (var command = new SqliteCommand(insertQuery, connection))
            {
                command.Parameters.AddWithValue("@Vorname", vertreter.Vorname);
                command.Parameters.AddWithValue("@Nachname", vertreter.Nachname);
                command.Parameters.AddWithValue("@Firma", vertreter.Firma);
                command.Parameters.AddWithValue("@Gebiet", vertreter.Gebiet);
                command.Parameters.AddWithValue("@Umsatz", vertreter.Umsatz);

                command.ExecuteNonQuery();
            }
        }
        transaction.Commit();
    }
}

void PrintAllData(SqliteConnection connection)
{
    string selectQuery = "SELECT Vorname, Nachname, Firma, Gebiet, Umsatz FROM Vertreter";

    using (var command = new SqliteCommand(selectQuery, connection))
    using (var reader = command.ExecuteReader())
    {
        while (reader.Read())
        {
            string vorname = reader.GetString(0);
            string nachname = reader.GetString(1);
            string firma = reader.GetString(2);
            string gebiet = reader.GetString(3);
            decimal umsatz = reader.GetDecimal(4);

            Console.WriteLine($"{vorname} {nachname}, {firma}, {gebiet}: {umsatz}");
        }
    }
}


[Serializable]
public class Vertreter
{
    public string Vorname { get; set; }
    public string Nachname { get; set; }
    public string Firma { get; set; }
    public string Gebiet { get; set; }
    public decimal Umsatz { get; set; }
}