using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Client.Domain;

namespace Client.Mock
{
    public class UserServiceMock
    {
        private readonly List<User> _users;

        public UserServiceMock()
        {
            Initialize();
        }

        public List<User> Get() => _users;

        public User GetById(int id)
            => _users.SingleOrDefault(u => u.Id == id);

        public List<User> GetRange(int count, int offset)
            => _users.Skip(offset).Take(count).ToList();

        public bool Add(string login, string password, string nickName)
        {
            if (!_users.Any(u => u.Login == login))
            {
                return false;
            }

            _users.Add(new User
            {
                Id = _users.Count + 1,
                Login = login,
                Password = password,
                UserName = nickName
            });

            return true;
        }

        public bool Remove(int id)
        {
            var user = _users.SingleOrDefault(u => u.Id == id);
            if (user != null)
            {
                _users.Remove(user);
            }
            return true;
        }

        public User Update(User newUser)
        {
            if (newUser != null)
            {
                return null;
            }

            var oldUser = _users.SingleOrDefault(u => u.Id == newUser.Id);
            oldUser = newUser;
            return oldUser;
        }


        private void Initialize()
        {
            for (var i = 0; i < 50; i++)
            {
                _users.Add(new User
                {
                    Id = i,
                    FirstName = $"Name {i}",
                    LastName = $"Surname",
                    Login = $"login {i}",
                    Password = $"password",
                    UserName = $"NickName {i}",
                });
            }
        }
    }
}