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 GuestImplement : IGuestLogic
    {
        public Guest? Create(Guest guest)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("INSERT INTO guest (full_name, phone_number, birth_date, passport_id, gender) VALUES (@Full_name, @Phone_number, @Birth_date, @Passport_id, @Gender)", con);
            cmd.Parameters.AddWithValue("@Full_name", guest.FIO);
            cmd.Parameters.AddWithValue("@Phone_number", guest.PhoneNumber);
            cmd.Parameters.AddWithValue("@Birth_date", guest.BirthDate);
            cmd.Parameters.AddWithValue("@Passport_id", guest.PassportId);
            cmd.Parameters.AddWithValue("@Gender", guest.Gender.ToString());
            cmd.ExecuteNonQuery();
            return guest;
        }

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

        public Guest? Get(int id)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"SELECT * FROM guest WHERE guest_id = {id}", con);
            using var reader = cmd.ExecuteReader();
            if (reader.Read())
            {
                return new Guest
                {
                    Id = reader.GetInt32(0),
                    FIO = reader.GetString(1),
                    PhoneNumber = reader.GetString(2),
                    BirthDate = ToDateOnly(reader.GetDateTime(3)),
                    PassportId = reader.GetString(4),
                    Gender = (GenderEnum)Enum.Parse(typeof(GenderEnum), reader.GetString(5)),
                };
            }
            return null;
        }

        public List<Guest> GetAll()
        {
            var guests = new List<Guest>();
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand("SELECT * FROM guest order by guest_id", con);
            using var reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                guests.Add(new Guest
                {
                    Id = reader.GetInt32(0),
                    FIO = reader.GetString(1),
                    PhoneNumber = reader.GetString(2),
                    BirthDate = ToDateOnly(reader.GetDateTime(3)),
                    PassportId = reader.GetString(4),
                    Gender = (GenderEnum)Enum.Parse(typeof(GenderEnum), reader.GetString(5)),
                });
            }
            return guests;
        }

        public Guest? Update(Guest guest)
        {
            using var con = SqlConnection.GetConnection();
            con.Open();
            using var cmd = new NpgsqlCommand($"UPDATE guest SET full_name = '{guest.FIO}', phone_number = '{guest.PhoneNumber}', birth_date = '{guest.BirthDate}', passport_id = '{guest.PassportId}', gender = '{guest.Gender}' WHERE guest_id = '{guest.Id}'", con);
            cmd.ExecuteNonQuery();
            var element = Get(guest.Id);
            return element;
        }

        public DateOnly ToDateOnly (DateTime dateTime)
        {
            var DateTime = dateTime;
            var Date = new DateOnly(DateTime.Year, DateTime.Month, DateTime.Day);
            return Date;
        }
    }
}