/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.maven.surefire.common.junit48;

import java.util.Collection;

import org.junit.runner.Description;
import org.junit.runner.manipulation.Filter;

final class CombinedCategoryFilter extends Filter {
    private final Collection<Filter> includedFilters;

    private final Collection<Filter> excludedFilters;

    CombinedCategoryFilter(Collection<Filter> includedFilters, Collection<Filter> excludedFilters) {
        this.includedFilters = includedFilters;
        this.excludedFilters = excludedFilters;
    }

    @Override
    public boolean shouldRun(Description description) {
        return (includedFilters.isEmpty() || anyFilterMatchesDescription(includedFilters, description))
                && (excludedFilters.isEmpty() || allFiltersMatchDescription(excludedFilters, description));
    }

    private boolean anyFilterMatchesDescription(Collection<Filter> filters, Description description) {
        for (Filter f : filters) {
            if (f.shouldRun(description)) {
                return true;
            }
        }
        return false;
    }

    private boolean allFiltersMatchDescription(Collection<Filter> filters, Description description) {
        for (Filter f : filters) {
            if (!f.shouldRun(description)) {
                return false;
            }
        }
        return true;
    }

    @Override
    public String describe() {
        StringBuilder sb = new StringBuilder();
        if (!includedFilters.isEmpty()) {
            sb.append("(");
            sb.append(joinFilters(includedFilters, " OR "));
            sb.append(")");
            if (!excludedFilters.isEmpty()) {
                sb.append(" AND ");
            }
        }

        if (!excludedFilters.isEmpty()) {
            sb.append("NOT (");
            sb.append(joinFilters(includedFilters, " OR "));
            sb.append(")");
        }

        return sb.toString();
    }

    private String joinFilters(Collection<Filter> filters, String sep) {
        boolean isFirst = true;
        StringBuilder sb = new StringBuilder();
        for (Filter f : filters) {
            if (!isFirst) {
                sb.append(sep);
            }
            sb.append(f.describe());
            isFirst = false;
        }
        return sb.toString();
    }
}
