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/*
 * Copyright 2017 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.dsl.dependencies;

import groovy.lang.Closure;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.ConfigurationContainer;
import org.gradle.internal.metaobject.DynamicInvokeResult;
import org.gradle.internal.metaobject.MethodAccess;
import org.gradle.util.CollectionUtils;

import java.util.List;

class DynamicAddDependencyMethods implements MethodAccess {
    private ConfigurationContainer configurationContainer;
    private DependencyAdder dependencyAdder;

    DynamicAddDependencyMethods(ConfigurationContainer configurationContainer, DependencyAdder dependencyAdder) {
        this.configurationContainer = configurationContainer;
        this.dependencyAdder = dependencyAdder;
    }

    @Override
    public boolean hasMethod(String name, Object... arguments) {
        return arguments.length != 0 && configurationContainer.findByName(name) != null;
    }

    @Override
    public DynamicInvokeResult tryInvokeMethod(String name, Object... arguments) {
        if (arguments.length == 0) {
            return DynamicInvokeResult.notFound();
        }
        Configuration configuration = configurationContainer.findByName(name);
        if (configuration == null) {
            return DynamicInvokeResult.notFound();
        }

        List normalizedArgs = CollectionUtils.flattenCollections(arguments);
        if (normalizedArgs.size() == 2 && normalizedArgs.get(1) instanceof Closure) {
            return DynamicInvokeResult.found(dependencyAdder.add(configuration, normalizedArgs.get(0), (Closure) normalizedArgs.get(1)));
        } else if (normalizedArgs.size() == 1) {
            return DynamicInvokeResult.found(dependencyAdder.add(configuration, normalizedArgs.get(0), null));
        } else {
            for (Object arg : normalizedArgs) {
                dependencyAdder.add(configuration, arg, null);
            }
            return DynamicInvokeResult.found();
        }
    }

    interface DependencyAdder {
        T add(Configuration configuration, Object dependencyNotation, Closure configureAction);
    }
}