package at.ac.tuwien.sepm.assignment.groupphase.missioncontrol.service;

import at.ac.tuwien.sepm.assignment.groupphase.exception.InvalidOperationException;
import at.ac.tuwien.sepm.assignment.groupphase.exception.InvalidVehicleException;
import at.ac.tuwien.sepm.assignment.groupphase.exception.ServiceException;
import at.ac.tuwien.sepm.assignment.groupphase.missioncontrol.dto.Operation;
import at.ac.tuwien.sepm.assignment.groupphase.missioncontrol.dto.Operation.Status;
import at.ac.tuwien.sepm.assignment.groupphase.missioncontrol.dto.Vehicle;
import java.util.EnumSet;
import java.util.Set;
import java.util.SortedSet;

public interface OperationService {

    /**
     * Add given operation to the store.
     *
     * @param operation that should be added to the store
     * @return the id that was assigned
     * @throws InvalidOperationException if the operation is invalid
     * @throws ServiceException if the operation could not be persisted
     */
    long add(Operation operation) throws InvalidOperationException, ServiceException;

    /**
     * Request new vehicles to the given operation.
     *
     * @param operationId id of the operation that the vehicles should be send to
     * @param vehicleIds the ids of the vehicles that should be send to the given operation
     * @throws InvalidOperationException if the operationId is invalid or does not exist
     * @throws InvalidVehicleException if one of the vehicle ids is invalid or does not exist
     * @throws ServiceException if the vehicles could not be loaded or the operation could not be
     *     persisted
     */
    void requestVehicles(long operationId, Set<Long> vehicleIds)
            throws InvalidOperationException, InvalidVehicleException, ServiceException;

    /**
     * Completes the given operation with the specified status.
     *
     * @param operationId id of the operation that should be completed
     * @param status of the completed operation, either {@link Status#COMPLETED} or {@link
     *     Status#CANCELLED}
     * @throws InvalidOperationException if the operationId is invalid or does not exist
     * @throws ServiceException if the operation could not be persisted
     */
    void complete(long operationId, Status status)
            throws InvalidOperationException, ServiceException;

    /**
     * Get all available vehicles, sorted by how well they fit to the given opCode, starting with
     * the best fitting.
     *
     * @param opCode the operation code that is used to determine the ranking
     * @return a sorted list containing all available vehicles
     * @throws InvalidOperationException if the opCode is invalid
     * @throws ServiceException if loading the stored vehicles failed
     */
    SortedSet<Vehicle> rankVehicles(String opCode)
            throws InvalidOperationException, ServiceException;

    /**
     * Get all stored operations with matching status.
     *
     * @param statuses set containing all statuses that should be matched
     * @return list containing all matched operations
     * @throws ServiceException if loading the stored operations failed
     */
    Set<Operation> list(EnumSet<Status> statuses) throws ServiceException;
}