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/*
 * Copyright © 2015 Stefan Niederhauser ([email protected])
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package guru.nidi.codeassert.pmd;

import guru.nidi.codeassert.util.ResultMatcher;
import net.sourceforge.pmd.cpd.Mark;
import net.sourceforge.pmd.cpd.Match;
import org.hamcrest.Description;

import java.util.*;

public class CpdMatcher extends ResultMatcher {
    private static final Comparator MARK_COMPARATOR = new Comparator() {
        @Override
        public int compare(Mark m1, Mark m2) {
            return m1.getFilename().compareTo(m2.getFilename());
        }
    };

    public void describeTo(Description description) {
        description.appendText("Has no code duplications");
    }

    @Override
    protected void describeMismatchSafely(CpdResult item, Description description) {
        for (final Match match : item.findings()) {
            description.appendText("\n").appendText(printMatch(match));
        }
    }

    private String printMatch(Match match) {
        final StringBuilder s = new StringBuilder();
        boolean first = true;
        for (final Mark mark : getMarks(match)) {
            s.append(first ? String.format("%-4d ", match.getTokenCount()) : "     ");
            first = false;
            s.append(String.format("%s:%d-%d%n", mark.getFilename(), mark.getBeginLine(), mark.getEndLine()));
        }
        return s.substring(0, s.length() - 1);
    }

    private List getMarks(Match match) {
        final List marks = new ArrayList<>();
        final Iterator iter = match.iterator();
        while (iter.hasNext()) {
            marks.add(iter.next());
        }
        Collections.sort(marks, MARK_COMPARATOR);
        return marks;
    }
}