/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.gradle.internal;

import org.elasticsearch.gradle.util.FileUtils;
import org.gradle.api.DefaultTask;
import org.gradle.api.file.ConfigurableFileCollection;
import org.gradle.api.file.RegularFileProperty;
import org.gradle.api.tasks.Classpath;
import org.gradle.api.tasks.InputFiles;
import org.gradle.api.tasks.OutputFile;
import org.gradle.api.tasks.TaskAction;

import java.io.File;
import java.util.stream.Collectors;

import javax.inject.Inject;

abstract class GenerateProviderManifest extends DefaultTask {

    @Inject
    public GenerateProviderManifest() {}

    @Classpath
    @InputFiles
    abstract public ConfigurableFileCollection getProviderImplClasspath();

    @OutputFile
    abstract RegularFileProperty getManifestFile();

    @TaskAction
    void generateManifest() {
        File manifestFile = getManifestFile().get().getAsFile();
        manifestFile.getParentFile().mkdirs();
        FileUtils.write(manifestFile, generateManifestContent(), "UTF-8");
    }

    private String generateManifestContent() {
        return getProviderImplClasspath().getFiles().stream().map(File::getName).sorted().collect(Collectors.joining("\n"));
    }
}