/*
 * Copyright 2007-2008 the original author or authors.
 *
 * 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 org.gradle.api.internal.artifacts;

import org.gradle.api.InvalidUserDataException;
import org.gradle.api.artifacts.ExcludeRule;
import org.gradle.util.internal.WrapUtil;
import org.junit.Test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.CoreMatchers.sameInstance;
import static org.hamcrest.MatcherAssert.assertThat;

public class DefaultExcludeRuleContainerTest {
    @Test
    public void testInit() {
        assertThat(new DefaultExcludeRuleContainer().getRules().size(), equalTo(0));
    }

    @Test
    public void testInitWithRules() {
        Set<ExcludeRule> sourceExcludeRules = new HashSet<ExcludeRule>();
        sourceExcludeRules.add(new DefaultExcludeRule("aGroup", null));
        DefaultExcludeRuleContainer defaultExcludeRuleContainer = new DefaultExcludeRuleContainer(sourceExcludeRules);
        assertThat(defaultExcludeRuleContainer.getRules(), equalTo(sourceExcludeRules));
        assertThat(defaultExcludeRuleContainer.getRules(), not(sameInstance(sourceExcludeRules)));
    }

    @Test
    public void testAdd() {
        DefaultExcludeRuleContainer excludeRuleContainer = new DefaultExcludeRuleContainer();
        Map<String, String> excludeRuleArgs1 = WrapUtil.toMap("group", "value1");
        Map<String, String> excludeRuleArgs2 = WrapUtil.toMap("module", "value2");
        excludeRuleContainer.add(excludeRuleArgs1);
        excludeRuleContainer.add(excludeRuleArgs2);
        assertThat(excludeRuleContainer.getRules().size(), equalTo(2));
        assertExcludeRuleContainerHasCorrectExcludeRules(excludeRuleContainer.getRules(), excludeRuleArgs1, excludeRuleArgs2);
    }

    @Test(expected = InvalidUserDataException.class)
    public void testInvalidExcludeDefinitionThrowsInvalidUserDataException() {
        DefaultExcludeRuleContainer excludeRuleContainer = new DefaultExcludeRuleContainer();
        Map<String, String> excludeRuleArgs1 = WrapUtil.toMap("group", "value1");
        Map<String, String> excludeRuleArgs2 = WrapUtil.toMap("invalidkey2", "value2");
        excludeRuleContainer.add(excludeRuleArgs1);
        excludeRuleContainer.add(excludeRuleArgs2);
    }

    private void assertExcludeRuleContainerHasCorrectExcludeRules(Set<ExcludeRule> excludeRules, Map... excludeRuleArgs) {
        List<Map> foundRules = new ArrayList<Map>();
        for (ExcludeRule excludeRule : excludeRules) {
            for (Map excludeRuleArg : excludeRuleArgs) {
                if (matchingExcludeRule(excludeRule, excludeRuleArg)) {
                    foundRules.add(excludeRuleArg);
                    continue;
                }
            }
        }
        assertThat(new HashSet<Map>(Arrays.asList(excludeRuleArgs)), equalTo(new HashSet<Map>(foundRules)));
    }

    private boolean matchingExcludeRule(ExcludeRule excludeRule, Map excludeRuleArg) {
        final DefaultExcludeRule expectedExcludeRule = new DefaultExcludeRule((String) excludeRuleArg.get(ExcludeRule.GROUP_KEY), (String) excludeRuleArg.get(ExcludeRule.MODULE_KEY));
        return excludeRule.equals(expectedExcludeRule);
    }
}
