package se.citerus.dddsample.interfaces.tracking;

import org.springframework.context.MessageSource;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Errors;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.support.RequestContextUtils;
import se.citerus.dddsample.domain.model.cargo.Cargo;
import se.citerus.dddsample.domain.model.cargo.CargoRepository;
import se.citerus.dddsample.domain.model.cargo.TrackingId;
import se.citerus.dddsample.domain.model.handling.HandlingEvent;
import se.citerus.dddsample.domain.model.handling.HandlingEventRepository;

import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

/**
 * Controller for tracking cargo. This interface sits immediately on top of the
 * domain layer, unlike the booking interface which has a a remote facade and supporting
 * DTOs in between.
 * <p/>
 * An adapter class, designed for the tracking use case, is used to wrap the domain model
 * to make it easier to work with in a web page rendering context. We do not want to apply
 * view rendering constraints to the design of our domain model, and the adapter
 * helps us shield the domain model classes. 
 * <p/>
 *
 * @eee se.citerus.dddsample.application.web.CargoTrackingViewAdapter
 * @see se.citerus.dddsample.interfaces.booking.web.CargoAdminController
 *
 */
@Controller
public final class CargoTrackingController {

  private CargoRepository cargoRepository;
  private HandlingEventRepository handlingEventRepository;
  private MessageSource messageSource;

  @RequestMapping(method = RequestMethod.GET)
  public Map<String, CargoTrackingViewAdapter> get(final TrackCommand trackCommand) {
      return new HashMap<>();
  }

  @RequestMapping(method = RequestMethod.POST)
  protected Map<String, CargoTrackingViewAdapter> onSubmit(final HttpServletRequest request,
                                                           final TrackCommand command,
                                                           final BindingResult bindingResult) {
    new TrackCommandValidator().validate(command, bindingResult);

    final TrackingId trackingId = new TrackingId(command.getTrackingId());
    final Cargo cargo = cargoRepository.find(trackingId);

    final Map<String, CargoTrackingViewAdapter> model = new HashMap<String, CargoTrackingViewAdapter>();
    if (cargo != null) {
      final Locale locale = RequestContextUtils.getLocale(request);
      final List<HandlingEvent> handlingEvents = handlingEventRepository.lookupHandlingHistoryOfCargo(trackingId).distinctEventsByCompletionTime();
      model.put("cargo", new CargoTrackingViewAdapter(cargo, messageSource, locale, handlingEvents));
    } else {
      bindingResult.rejectValue("trackingId", "cargo.unknown_id", new Object[]{command.getTrackingId()}, "Unknown tracking id");
    }
    return model;
  }

  public void setCargoRepository(CargoRepository cargoRepository) {
    this.cargoRepository = cargoRepository;
  }

  public void setHandlingEventRepository(HandlingEventRepository handlingEventRepository) {
    this.handlingEventRepository = handlingEventRepository;
  }

  public void setMessageSource(MessageSource messageSource) {
      this.messageSource = messageSource;
  }

}