package net.sourceforge.fenixedu.presentationTier.Action.phd;

import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.phd.PhdIndividualProgramProcess;
import net.sourceforge.fenixedu.domain.phd.PhdIndividualProgramProcessState;
import pt.utl.ist.fenix.tools.predicates.InlinePredicate;
import pt.utl.ist.fenix.tools.predicates.OrPredicate;
import pt.utl.ist.fenix.tools.predicates.Predicate;
import pt.utl.ist.fenix.tools.predicates.PredicateContainer;

public enum PhdInactivePredicateContainer implements PredicateContainer<PhdIndividualProgramProcess> {

    SUSPENDED {
        @Override
        public Predicate<PhdIndividualProgramProcess> getPredicate() {
            return new PhdInactivePredicate(PhdIndividualProgramProcessState.SUSPENDED);
        }
    },

    CONCLUDED {
        @Override
        public Predicate<PhdIndividualProgramProcess> getPredicate() {
            return new PhdInactivePredicate(PhdIndividualProgramProcessState.CONCLUDED);
        }
    },

    CONCLUDED_THIS_YEAR {
        @Override
        public Predicate<PhdIndividualProgramProcess> getPredicate() {
            return new PhdInactivePredicate(PhdIndividualProgramProcessState.CONCLUDED) {
                @Override
                public boolean eval(PhdIndividualProgramProcess process) {
                    return super.eval(process) && process.getConclusionYear().equals(ExecutionYear.readCurrentExecutionYear());
                }
            };
        }
    },

    ABOLISHED {
        @Override
        public Predicate<PhdIndividualProgramProcess> getPredicate() {
            final PhdInactivePredicate cancelledPredicate = new PhdInactivePredicate(PhdIndividualProgramProcessState.CANCELLED);
            final PhdInactivePredicate flunkedPredicate = new PhdInactivePredicate(PhdIndividualProgramProcessState.FLUNKED);
            final PhdInactivePredicate notAdmittedPredicate =
                    new PhdInactivePredicate(PhdIndividualProgramProcessState.NOT_ADMITTED);

            return new OrPredicate<PhdIndividualProgramProcess>() {
                {
                    add(cancelledPredicate);
                    add(flunkedPredicate);
                    add(notAdmittedPredicate);
                }
            };
        }
    };

    private static class PhdInactivePredicate extends
            InlinePredicate<PhdIndividualProgramProcess, PhdIndividualProgramProcessState> {
        public PhdInactivePredicate(PhdIndividualProgramProcessState processState) {
            super(processState);
        }

        @Override
        public boolean eval(PhdIndividualProgramProcess process) {
            return checkState(process) && checkValue(process);
        }

        private boolean checkState(PhdIndividualProgramProcess process) {
            return !process.getActiveState().isPhdActive();
        }

        private boolean checkValue(PhdIndividualProgramProcess process) {
            return process.getActiveState().equals(getValue());
        }
    }
}