using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using CG67.FicheCollege.Domaine;
using CG67.FicheCollege.Interface;

namespace CG67.FicheCollege.Entrepot
{
    public class EntrepotChiffresSignificatifs : EntrepotBase, IEntrepotChiffresSignificatifs
    {
        public ChiffresSignificatifs GetByAnnee(int annee)
        {
            ChiffresSignificatifs resultat = new ChiffresSignificatifs();
            using (SqlConnection connexion = new SqlConnection(this.ChaineDeConnexion))
            {
                try
                {
                    connexion.Open();
                    using (SqlCommand command = connexion.CreateCommand())
                    {
                        //Il n'est pas possible de tout faire en une requete ...
                        //Du coup, une requete a été crée par chiffre (deux dans le cas du montant total des financements.
                        command.CommandText = "SELECT sum(Dotation.Montant) as totalDotation FROM Dotation WHERE Dotation.Annee = @Annee";
                        command.Parameters.AddWithValue("@Annee", annee);
                        using (SqlDataReader dr = command.ExecuteReader())
                        {
                            while (dr.Read())
                            {
                                resultat.MontantTotalFinancements += Convert.ToDouble(dr["totalDotation"].ToString());
                            }
                        }
                        command.CommandText = "SELECT sum(MontantSubvention) as totalSubvention FROM Etablissement_ActionEducative WHERE Etablissement_ActionEducative.Annee = @Annee";
                        using (SqlDataReader dr2 = command.ExecuteReader())
                        {
                            while (dr2.Read())
                            {
                                resultat.MontantTotalFinancements += Convert.ToDouble(dr2["totalSubvention"].ToString());
                            }
                        }
                        command.CommandText = "SELECT sum(TotalEleves) as totalEleves FROM Effectif WHERE Effectif.Annee = @Annee";
                        using (SqlDataReader dr3 = command.ExecuteReader())
                        {
                            while (dr3.Read())
                            {
                                resultat.NbTotalEleves += Convert.ToInt16(dr3["totalEleves"].ToString());
                            }
                        }
                        command.CommandText = "SELECT sum(Montant) as totalInvest FROM Investissement WHERE Investissement.Annee = @Annee";
                        using (SqlDataReader dr4 = command.ExecuteReader())
                        {
                            while (dr4.Read())
                            {
                                resultat.MontantTotalInvestissement += Convert.ToDouble(dr4["totalInvest"].ToString());
                            }
                        }
                        command.CommandText = "SELECT CoutTotal as totalTransport FROM Transport WHERE Transport.Annee = @Annee";
                        using (SqlDataReader dr5 = command.ExecuteReader())
                        {
                            while (dr5.Read())
                            {
                                resultat.MontantTotalTransportScolaire += Convert.ToDouble(dr5["totalTransport"].ToString());
                            }
                        }
                    }
                }
                catch (Exception erreurInterne)
                {
                    throw new Exception(erreurInterne.ToString());
                }
                finally
                {
                    if (connexion.State == ConnectionState.Open)
                        connexion.Close();
                }
            }
            return resultat;
        }
    }
}