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 HotelImplement : IHotelLogic
    {
        public Hotel? Create(Hotel hotel)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("INSERT INTO hotel (name, address, count_star, count_room) VALUES (@Name, @Address, @Count_star, @Count_room)", con);
            cmd.Parameters.AddWithValue("@Name", hotel.HotelName);
            cmd.Parameters.AddWithValue("@Address", hotel.Address);
            cmd.Parameters.AddWithValue("@Count_star", hotel.CountStar);
            cmd.Parameters.AddWithValue("@Count_room", hotel.CountRoom);
            cmd.ExecuteNonQuery();
            return hotel;
        }

        public Hotel? CreateId(Hotel hotel)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("INSERT INTO hotel (hotel_id, name, address, count_star, count_room) VALUES (@Hotel_id, @Name, @Address, @Count_star, @Count_room)", con);
            cmd.Parameters.AddWithValue("@Hotel_id", hotel.Id);
            cmd.Parameters.AddWithValue("@Name", hotel.HotelName);
            cmd.Parameters.AddWithValue("@Address", hotel.Address);
            cmd.Parameters.AddWithValue("@Count_star", hotel.CountStar);
            cmd.Parameters.AddWithValue("@Count_room", hotel.CountRoom);
            cmd.ExecuteNonQuery();
            return hotel;
        }

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

        public Hotel? Get(int id)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"SELECT * FROM hotel WHERE hotel_id = {id}", con);
            using var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                return new Hotel
                {
                    Id = reader.GetInt32(0),
                    HotelName = reader.GetString(1),
                    Address = reader.GetString(2),
                    CountStar = reader.GetInt32(3),
                    CountRoom = reader.GetInt32(4),
                };
            }
            return null;
        }

        public List<Hotel> GetAll()
        {
            var hotels = new List<Hotel>();
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("SELECT * FROM hotel order by hotel_id", con);
            using var reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                hotels.Add(new Hotel
                {
                    Id = reader.GetInt32(0),
                    HotelName = reader.GetString(1),
                    Address = reader.GetString(2),
                    CountStar = reader.GetInt32(3),
                    CountRoom = reader.GetInt32(4),
                });
            }
            return hotels;
        }

        public Hotel? Update(Hotel hotel)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"UPDATE hotel SET name = '{hotel.HotelName}', address = '{hotel.Address}', count_star = '{hotel.CountStar}', count_room = '{hotel.CountRoom}' WHERE hotel_id = '{hotel.Id}'", con);
            cmd.ExecuteNonQuery();
            var element = Get(hotel.Id);
            return element;
        }
    }
}