using HotelAbstractions.Logic;
using HotelAbstractions.Models;
using Npgsql;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelDatabase.Implement
{
    public class ServiceCheckImplement : IServiceCheckLogic
    {
        public ServiceCheck? Create(ServiceCheck serviceCheck)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand(
                "INSERT INTO service_check (fk_reservation_id, fk_service_id, count, service_date)" +
                             " VALUES (@FKReservation_id, @FKService_id, @Count, @Service_date)",
                con
                );
            cmd.Parameters.AddWithValue("@FKReservation_id", serviceCheck.ReservationId == 0 ? DBNull.Value : serviceCheck.ReservationId);
            cmd.Parameters.AddWithValue("@FKService_id", serviceCheck.ServiceId == 0 ? DBNull.Value : serviceCheck.ServiceId);
            cmd.Parameters.AddWithValue("@Count", serviceCheck.Count);
            cmd.Parameters.AddWithValue("@Service_date", serviceCheck.DateTime);
            cmd.ExecuteNonQuery();
            return serviceCheck;
        }

        public ServiceCheck? Delete(int id)
        {
            var element = Get(id);
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"DELETE FROM service_check WHERE service_check_id = {id}", con);
            cmd.ExecuteNonQuery();
            return element;
        }

        public ServiceCheck? Get(int id)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"SELECT * FROM service_check WHERE service_check_id = {id}", con);
            using var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                return new ServiceCheck
                {
                    Id = reader.GetInt32(0),
                    ReservationId = !reader.IsDBNull(1) ? reader.GetInt32(1) : 0,
                    ServiceId = !reader.IsDBNull(2) ? reader.GetInt32(2) : 0,
                    Count = reader.GetInt32(3),
                    DateTime = reader.GetDateTime(4),
                };
            }
            return null;
        }

        public List<ServiceCheck> GetAll()
        {
            var serviceChecks = new List<ServiceCheck>();
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("SELECT * FROM service_check order by service_check_id", con);
            using var reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                serviceChecks.Add(new ServiceCheck
                {
                    Id = reader.GetInt32(0),
                    ReservationId = !reader.IsDBNull(1) ? reader.GetInt32(1) : 0,
                    ServiceId = !reader.IsDBNull(2) ? reader.GetInt32(2) : 0,
                    Count = reader.GetInt32(3),
                    DateTime = reader.GetDateTime(4),
                });
            }
            return serviceChecks;
        }

        public ServiceCheck? Update(ServiceCheck serviceCheck)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"UPDATE service_check SET " +
                $"fk_reservation_id = @FKReservation_Id, " +
                $"fk_service_id = @FKService_Id, " +
                $"count = '{serviceCheck.Count}', " +
                $"service_date = '{serviceCheck.DateTime}', " +
                $"WHERE service_check_id = '{serviceCheck.Id}' ", con);
            cmd.Parameters.AddWithValue("@FKReservation_Id", serviceCheck.ReservationId == 0 ? DBNull.Value : serviceCheck.ReservationId);
            cmd.Parameters.AddWithValue("@FKService_Id", serviceCheck.ServiceId == 0 ? DBNull.Value : serviceCheck.ServiceId);
            cmd.ExecuteNonQuery();
            var element = Get(serviceCheck.Id);
            return element;
        }
    }
}