MafiaTelegramBot/MafiaTelegramBot/Game/GameRoles/DoctorRole.cs

using System.Linq;
using System.Threading.Tasks;
using MafiaTelegramBot.Game.GameRooms;
using MafiaTelegramBot.Models;
using MafiaTelegramBot.Resources;
using Telegram.Bot.Types;

namespace MafiaTelegramBot.Game.GameRoles
{
    public class DoctorRole : GameRoom.Role
    {
        public override Roles RoleKey => Roles.Doctor;

        public override async Task NightAction()
        {
            var targets = Room.Players.Values.Where(p => p.IsAlive).ToList();
            var message = await Bot.SendWithMarkdown2(Player.ChatId, strings.choose_player_to_heal, 
                Keyboard.NightChooseTargetKeyboard(targets, Player.Id));
            MessageId = message.MessageId;
        }

        public override async Task ApplyNightActionResult()
        {
            if (NightTargetId == -1)
                await Bot.Get().EditMessageTextAsync(Player.ChatId, MessageId, strings.you_have_not_choosen_target);
            else
            {
                var user = Room.Players[NightTargetId];
                var isTargetSaved = true; //TODO when doctor heals mafia target
                if(isTargetSaved)
                    await Bot.Get().EditMessageTextAsync(Player.ChatId, MessageId, $"{strings.you_save_the_target} {user.NickName}");
            }
        }

        public override Task CancelNightActionResult(string message)
        {
            //TODO why action canceled
            return Task.CompletedTask;
        }

        public override Task<Message> SetNightTarget(long userId)
        {
            var canHeal = true; //TODO why doctor cant heal
            if (canHeal)
            {
                NightTargetId = userId;
                return Bot.Get().EditMessageTextAsync(Player.ChatId, MessageId, $"{strings.you_choose_target} {Room.Players[userId].NickName}");
            }
            return Bot.SendWithMarkdown2(Player.ChatId, strings.you_cant_heal_this_target);
        }

        public DoctorRole(GameRoom room, Player player) : base(room, player) { }
    }
}