/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.jshell;

import java.util.ArrayList;

import java.util.Collection;

import java.util.stream.Collectors;

/**

 * List of diagnostics, with convenient operations.

 *

 * @author Robert Field

 */

@SuppressWarnings("serial")             // serialVersionUID intentionally omitted

final class DiagList extends ArrayList<Diag> {

    private int cntNotStmt = 0;

    private int cntUnreach = 0;

    private int cntResolve = 0;

    private int cntOther = 0;

    DiagList() {

        super();

    }

    DiagList(Diag d) {

        super();

        add(d);

    }

    DiagList(Collection<? extends Diag> c) {

        super();

        addAll(c);

    }

    private void tally(Diag d) {

        if (d.isError()) {

            if (d.isUnreachableError()) {

                ++cntUnreach;

            } else if (d.isNotAStatementError()) {

                ++cntNotStmt;

            } else if (d.isResolutionError()) {

                ++cntResolve;

            } else {

                ++cntOther;

            }

        }

    }

    @Override

    public boolean addAll(Collection<? extends Diag> c) {

    }

    @Override

    public Diag set(int index, Diag element) {

        throw new UnsupportedOperationException();

    }

    @Override

    public void add(int index, Diag element) {

        throw new UnsupportedOperationException();

    }

    @Override

    public boolean add(Diag d) {

        boolean added = super.add(d);

        if (added) {

            tally(d);

        }

        return added;

    }

    @Override

    public boolean addAll(int index, Collection<? extends Diag> c) {

        throw new UnsupportedOperationException();

    }

    @Override

    public boolean remove(Object o) {

        throw new UnsupportedOperationException();

    }

    DiagList ofUnit(Unit u) {

        return this.stream()

                .filter(d -> {

                    Snippet snn = d.snippetOrNull();

                    return snn == u.snippet();

                })

    }

    boolean hasErrors() {

        return (cntNotStmt + cntResolve + cntUnreach + cntOther) > 0;

    }

    boolean hasResolutionErrorsAndNoOthers() {

        return cntResolve > 0 && (cntNotStmt + cntUnreach + cntOther) == 0;

    }

    boolean hasUnreachableError() {

        return cntUnreach > 0;

    }

    boolean hasNotStatement() {

        return cntNotStmt > 0;

    }

    boolean hasOtherThanNotStatementErrors() {

        return (cntResolve + cntUnreach + cntOther) > 0;

    }

}