/*
 * Copyright 2019 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.ivyservice.resolveengine.excludes.factories

import groovy.transform.CompileStatic
import org.gradle.api.internal.artifacts.DefaultModuleIdentifier
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.simple.DefaultExcludeFactory
import org.gradle.api.internal.artifacts.ivyservice.resolveengine.excludes.specs.ExcludeSpec
import org.gradle.internal.component.model.DefaultIvyArtifactName
import org.gradle.internal.component.model.IvyArtifactName

import static org.gradle.api.internal.artifacts.DefaultModuleIdentifier.newId

@CompileStatic
trait ExcludeTestSupport {
    ExcludeFactory factory = new DefaultExcludeFactory()

    ExcludeSpec group(String group) {
        factory.group(group)
    }

    ExcludeSpec module(String name) {
        factory.module(name)
    }

    ExcludeSpec moduleSet(String... names) {
        factory.moduleSet(RandomizedIteratorHashSet.of(names as Set<String>))
    }

    ExcludeSpec groupSet(String... groups) {
        factory.groupSet(RandomizedIteratorHashSet.of(groups as Set<String>))
    }

    ExcludeSpec moduleId(String group, String name) {
        factory.moduleId(newId(group, name))
    }

    ExcludeSpec moduleIdSet(List<String>... ids) {
        factory.moduleIdSet(RandomizedIteratorHashSet.of(ids.collect { newId(it[0], it[1]) } as Set))
    }

    ExcludeSpec anyOf(ExcludeSpec... specs) {
        switch (specs.length) {
            case 0:
                return factory.nothing()
            case 1:
                return specs[0]
            case 2:
                return factory.anyOf(specs[0], specs[1])
            default:
                return factory.anyOf(RandomizedIteratorHashSet.of(specs as Set))
        }
    }

    ExcludeSpec allOf(ExcludeSpec... specs) {
        switch (specs.length) {
            case 0:
                return factory.nothing()
            case 1:
                return specs[0]
            case 2:
                return factory.allOf(specs[0], specs[1])
            default:
                return factory.allOf(RandomizedIteratorHashSet.of(specs as Set))
        }
    }

    ExcludeSpec nothing() {
        factory.nothing()
    }

    ExcludeSpec everything() {
        factory.everything()
    }

    ExcludeSpec ivy(String group, String module, IvyArtifactName artifact, String matcher) {
        factory.ivyPatternExclude(
            DefaultModuleIdentifier.newId(group, module),
            artifact,
            matcher
        )
    }

    IvyArtifactName artifact(String name) {
        new DefaultIvyArtifactName(name, "jar", "jar")
    }

    private static class RandomizedIteratorHashSet<T> extends HashSet<T> {
        private final Random random = new Random()

        static <T> RandomizedIteratorHashSet<T> of(Set<T> other) {
            return new RandomizedIteratorHashSet<T>(other)
        }

        RandomizedIteratorHashSet(Set<T> other) {
            super(other)
        }

        Iterator<T> iterator() {
            List<T> asList = new ArrayList<>(size())
            Iterator<T> iterator = super.iterator()
            while (iterator.hasNext()) {
                asList.add(iterator.next())
            }
            Collections.shuffle(asList, random)
            asList.iterator()
        }
    }
}
