package in.ocsf.these.days.app.service;/* kpmy 19.02.2017 */

import com.pengrad.telegrambot.model.Update;
import in.ocsf.these.days.app.messaging.UpdateHelper;
import in.ocsf.these.days.app.object.Chat;
import in.ocsf.these.days.app.object.User;
import in.ocsf.these.days.app.repo.ChatRepository;
import in.ocsf.these.days.app.repo.UserRepository;
import in.ocsf.these.days.app.state.IChat;
import in.ocsf.these.days.app.state.StateService;
import in.ocsf.these.days.app.state.account.Accounted;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.statemachine.StateMachine;
import org.springframework.stereotype.Service;

import java.util.Optional;

@Service
public class UpdateService {

    private final Logger log = Logger.getLogger(getClass());

    @Autowired
    private ApplicationContext context;

    @Autowired
    private UserRepository userRepo;

    @Autowired
    private StateService stateService;

    @Autowired
    private ChatRepository chatRepo;

    @Autowired
    private CommandService commandService;

    @Autowired
    private Accounted accounted;

    private void handleUpdate(UpdateHelper upd) {
        if (!upd.hasText()) throw new RuntimeException();

        User user = User.fromUser(upd.getUser());
        user = Optional.ofNullable(userRepo.findOne(user.getId())).orElse(user);
        StateMachine<Accounted.State, Accounted.Event> state = stateService.getStateFor(user);
        stateService.put(state, IChat.USER, user.getId());
        stateService.put(state, upd);

        if (state.getState() == null) {
            userRepo.save(user);
            chatRepo.findByUserIdAndThenClose(user.getId());
            state.start();
            stateService.setStateFor(user, state);
            userRepo.save(user);
        }
        if (upd.isCommand())
            commandService.handle(state);
        else {
            Optional<Chat> chat0 = chatRepo.findByUserIdAndStateThenActualize(user.getId());
            chat0.ifPresent(c -> {
                StateMachine chatState = stateService.getChatStateFor(c);
                stateService.put(chatState, upd);
                stateService.put(chatState, IChat.CHAT, c.getId());
                IChat chat = context.getBean(c.getType().getBean());
                chat.handle(chatState);
            });
            if (!chat0.isPresent())
                accounted.handle(state);
        }
    }

    public void handleUpdate(Update upd) {
        UpdateHelper helper = UpdateHelper.from(upd);
        if (!helper.isEdit()) handleUpdate(helper);
    }

}