/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * 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.
 */
import com.google.common.base.Charsets
import com.google.common.io.Files
import com.google.common.hash.HashCode
import com.google.common.hash.HashFunction
import com.google.common.hash.Hashing
import java.nio.charset.Charset

// Main task called by the build server.
task(createArchive)

// upload anchor for subprojects to upload their artifacts
// to the local repo.
task(mainUpload)

rootProject.ext.repoWithHistoryOut = new File(buildDir, 'support_repo_with_history')

// repository creation task
task createRepository(type: Zip, dependsOn: mainUpload) {
    from rootProject.ext.supportRepoOut
    from "${repos.prebuiltsRoot}/maven_repo/android"
    // if there are duplicates, pick the first one.
    duplicatesStrategy "EXCLUDE"
    destinationDir project.ext.distDir
    into 'm2repository'
    baseName = String.format("sdk-repo-linux-m2repository-%s", project.ext.buildNumber)
}

task createTopOfTreeRepository(type : Zip) {
    description "Creates a maven repository that includes just the libraries compiled in this" +
            " project, without any history from prebuilts."
    from rootProject.ext.supportRepoOut
    destinationDir rootProject.ext.distDir
    into 'm2repository'
    baseName = String.format("top-of-tree-m2repository-%s", project.ext.buildNumber)
    dependsOn mainUpload
}

createArchive.dependsOn createRepository
createRepository.dependsOn createTopOfTreeRepository

// anchor for prepare repo. This is post unzip + sourceProp.
task nukeRepoOut() {
    description "This task clears the repo folder to ensure that we run a fresh build every" +
            " time we create arhives. Otherwise, snapshots will accumulate in the builds folder."
    doFirst {
        rootProject.ext.supportRepoOut.deleteDir()
        rootProject.ext.supportRepoOut.mkdirs()
    }
}

task(prepareRepo)

task(createXml).doLast({
    def repoArchive = createRepository.archivePath
    def repoArchiveName = createRepository.archiveName
    def size = repoArchive.length()
    def sha1 = getSha1(repoArchive)

    def xml =
            "<sdk:sdk-addon xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:sdk=\"http://schemas.android.com/sdk/android/addon/6\">\n\
  <sdk:extra>\n\
    <sdk:revision>\n\
      <sdk:major>${project.ext.extraVersion}</sdk:major>\n\
    </sdk:revision>\n\
    <sdk:vendor-display>Android</sdk:vendor-display>\n\
    <sdk:vendor-id>android</sdk:vendor-id>\n\
    <sdk:name-display>Local Maven repository for Support Libraries</sdk:name-display>\n\
    <sdk:path>m2repository</sdk:path>\n\
    <sdk:archives>\n\
      <sdk:archive>\n\
       <sdk:size>${size}</sdk:size>\n\
       <sdk:checksum type=\"sha1\">${sha1}</sdk:checksum>\n\
       <sdk:url>${repoArchiveName}</sdk:url>\n\
      </sdk:archive>\n\
    </sdk:archives>\n\
  </sdk:extra>\n\
</sdk:sdk-addon>"

    Files.write(xml, new File(project.ext.distDir, 'repo-extras.xml'), Charsets.UTF_8)
})
createArchive.dependsOn createXml
createXml.dependsOn createRepository

task(createSourceProp).doLast({
    def sourceProp =
            "Extra.VendorDisplay=Android\n\
Extra.Path=m2repository\n\
Archive.Arch=ANY\n\
Extra.NameDisplay=Android Support Repository\n\
Archive.Os=ANY\n\
Pkg.Desc=Local Maven repository for Support Libraries\n\
Pkg.Revision=${project.ext.extraVersion}.0.0\n\
Extra.VendorId=android"

    Files.write(sourceProp, new File(project.ext.supportRepoOut, 'source.properties'), Charsets.UTF_8)
})
createSourceProp.dependsOn nukeRepoOut
prepareRepo.dependsOn createSourceProp

/**
 * Generates SHA1 hash for the specified file's absolute path.
 *
 * @param inputFile file to hash
 * @return SHA1 hash
 */
String getSha1(File inputFile) {
    HashFunction hashFunction = Hashing.sha1()
    HashCode hashCode = hashFunction.hashString(inputFile.getAbsolutePath(), Charset.forName("UTF-8"))
    return hashCode.toString()
}