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 ServiceImplement : IServiceLogic
    {
        public Service? Create(Service service)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("INSERT INTO service (name, price) VALUES (@Name, @Price)", con);
            cmd.Parameters.AddWithValue("@Name", service.Name);
            cmd.Parameters.AddWithValue("@Price", service.Price);
            cmd.ExecuteNonQuery();
            return service;
        }

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

        public Service? Get(int id)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"SELECT * FROM service WHERE service_id = {id}", con);
            using var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                return new Service
                {
                    Id = reader.GetInt32(0),
                    Name = reader.GetString(1),
                    Price = reader.GetDouble(2),
                };
            }
            return null;
        }

        public List<Service> GetAll()
        {
            var services = new List<Service>();
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("SELECT * FROM service order by service_id", con);
            using var reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                services.Add(new Service
                {
                    Id = reader.GetInt32(0),
                    Name = reader.GetString(1),
                    Price = reader.GetDouble(2),
                });
            }
            return services;
        }

        public Service? Update(Service service)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"UPDATE service SET name = '{service.Name}', price = '{service.Price}' WHERE service_id = {service.Id}", con);
            cmd.ExecuteNonQuery();
            var element = Get(service.Id);
            return element;
        }
    }
}