/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you 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.github.jengelman.gradle.plugins.shadow.ShadowPlugin
import org.apache.tools.ant.taskdefs.condition.Os
import org.elasticsearch.gradle.BuildPlugin
import org.elasticsearch.gradle.Version
import org.elasticsearch.gradle.BwcVersions
import org.elasticsearch.gradle.VersionProperties
import org.elasticsearch.gradle.plugin.PluginBuildPlugin
import org.elasticsearch.gradle.tool.Boilerplate
import org.gradle.util.GradleVersion
import org.gradle.util.DistributionLocator
import org.gradle.plugins.ide.eclipse.model.SourceFolder

import static org.elasticsearch.gradle.tool.Boilerplate.maybeConfigure

plugins {
    id 'com.gradle.build-scan' version '2.4'
    id 'base'
    id 'elasticsearch.global-build-info'
}

apply plugin: 'nebula.info-scm'
apply from: 'gradle/build-scan.gradle'

// common maven publishing configuration
allprojects {
  group = 'org.elasticsearch'
  version = VersionProperties.elasticsearch
  description = "Elasticsearch subproject ${project.path}"
}

BuildPlugin.configureRepositories(project)

String licenseCommit
if (VersionProperties.elasticsearch.toString().endsWith('-SNAPSHOT')) {
  licenseCommit = scminfo.change ?: "master" // leniency for non git builds
} else {
  licenseCommit = "v${version}"
}
String elasticLicenseUrl = "https://raw.githubusercontent.com/elastic/elasticsearch/${licenseCommit}/licenses/ELASTIC-LICENSE.txt"

subprojects {
  // Default to the apache license
  project.ext.licenseName = 'The Apache Software License, Version 2.0'
  project.ext.licenseUrl = 'http://www.apache.org/licenses/LICENSE-2.0.txt'

  // But stick the Elastic license url in project.ext so we can get it if we need to switch to it
  project.ext.elasticLicenseUrl = elasticLicenseUrl

  // we only use maven publish to add tasks for pom generation
  plugins.withType(MavenPublishPlugin).whenPluginAdded {
    publishing {
      publications {
        // add license information to generated poms
        all {
          pom.withXml { XmlProvider xml ->
            Node node = xml.asNode()
            node.appendNode('inceptionYear', '2009')

            Node license = node.appendNode('licenses').appendNode('license')
            license.appendNode('name', project.licenseName)
            license.appendNode('url', project.licenseUrl)
            license.appendNode('distribution', 'repo')

            Node developer = node.appendNode('developers').appendNode('developer')
            developer.appendNode('name', 'Elastic')
            developer.appendNode('url', 'http://www.elastic.co')
          }
        }
      }
      repositories {
        maven {
          name = 'test'
          url = "${rootProject.buildDir}/local-test-repo"
        }
      }
    }
  }

  plugins.withType(BuildPlugin).whenPluginAdded {
    project.licenseFile = project.rootProject.file('licenses/APACHE-LICENSE-2.0.txt')
    project.noticeFile = project.rootProject.file('NOTICE.txt')
  }
}

/* Introspect all versions of ES that may be tested against for backwards
 * compatibility. It is *super* important that this logic is the same as the
 * logic in VersionUtils.java. */
BwcVersions versions = new BwcVersions(file('server/src/main/java/org/elasticsearch/Version.java').readLines('UTF-8'))

task updateCIBwcVersions() {
    doLast {
        File yml = file(".ci/bwcVersions")
        yml.text = ""
        yml << "BWC_VERSION:\n"
        versions.indexCompatible.each {
            yml << "  - \"$it\"\n"
        }
    }
}

// build metadata from previous build, contains eg hashes for bwc builds
String buildMetadataValue = System.getenv('BUILD_METADATA')
if (buildMetadataValue == null) {
  buildMetadataValue = ''
}
Map<String, String> buildMetadataMap = buildMetadataValue.tokenize(';').collectEntries {
  def (String key, String value) = it.split('=')
  return [key, value]
}

// injecting groovy property variables into all projects
allprojects {
  project.ext {
    // for ide hacks...
    isEclipse = System.getProperty("eclipse.launcher") != null ||   // Detects gradle launched from Eclipse's IDE
            System.getProperty("eclipse.application") != null ||    // Detects gradle launched from the Eclipse compiler server
            gradle.startParameter.taskNames.contains('eclipse') ||  // Detects gradle launched from the command line to do eclipse stuff
            gradle.startParameter.taskNames.contains('cleanEclipse')
    isIdea = System.getProperty("idea.active") != null || gradle.startParameter.taskNames.contains('idea') || gradle.startParameter.taskNames.contains('cleanIdea')

    // for BWC testing
    bwcVersions = versions

    buildMetadata = buildMetadataMap
  }
}

task verifyVersions {
  doLast {
    if (gradle.startParameter.isOffline()) {
      throw new GradleException("Must run in online mode to verify versions")
    }
    // Read the list from maven central. 
    // Fetch the metadata an parse the xml into Version instances because it's more straight forward here 
    // rather than bwcVersion ( VersionCollection ).
    new URL('https://repo1.maven.org/maven2/org/elasticsearch/elasticsearch/maven-metadata.xml').openStream().withStream { s ->
      bwcVersions.compareToAuthoritative(
              new XmlParser().parse(s)
                      .versioning.versions.version
                      .collect { it.text() }.findAll { it ==~ /\d+\.\d+\.\d+/ }
                      .collect { Version.fromString(it) }
      )
    }
    String ciYml = file(".ci/bwcVersions").text
    bwcVersions.indexCompatible.each {
        if (ciYml.contains("\"$it\"\n") == false) {
            throw new Exception(".ci/bwcVersions is outdated, run `./gradlew updateCIBwcVersions` and check in the results");
        }
    }
  }
}

/*
 * When adding backcompat behavior that spans major versions, temporarily
 * disabling the backcompat tests is necessary. This flag controls
 * the enabled state of every bwc task. It should be set back to true
 * after the backport of the backcompat code is complete.
 */

boolean bwc_tests_enabled = true
final String bwc_tests_disabled_issue = "" /* place a PR link here when committing bwc changes */
if (bwc_tests_enabled == false) {
  if (bwc_tests_disabled_issue.isEmpty()) {
    throw new GradleException("bwc_tests_disabled_issue must be set when bwc_tests_enabled == false")
  }
  println "========================= WARNING ========================="
  println "         Backwards compatibility tests are disabled!"
  println "See ${bwc_tests_disabled_issue}"
  println "==========================================================="
}
if (project.gradle.startParameter.taskNames.find { it.startsWith("checkPart") } != null) {
  // Disable BWC tests for checkPart* tasks as it's expected that this will run un it's own check
  bwc_tests_enabled = false
}

subprojects {
  ext.bwc_tests_enabled = bwc_tests_enabled
}

task verifyBwcTestsEnabled {
  doLast {
    if (bwc_tests_enabled == false) {
      throw new GradleException('Bwc tests are disabled. They must be re-enabled after completing backcompat behavior backporting.')
    }
  }
}

task branchConsistency {
  description 'Ensures this branch is internally consistent. For example, that versions constants match released versions.'
  group 'Verification'
  dependsOn verifyVersions, verifyBwcTestsEnabled
}

allprojects {
  // ignore missing javadocs
  tasks.withType(Javadoc).configureEach { Javadoc javadoc ->
    // the -quiet here is because of a bug in gradle, in that adding a string option
    // by itself is not added to the options. By adding quiet, both this option and
    // the "value" -quiet is added, separated by a space. This is ok since the javadoc
    // command already adds -quiet, so we are just duplicating it
    // see https://discuss.gradle.org/t/add-custom-javadoc-option-that-does-not-take-an-argument/5959
    javadoc.options.encoding='UTF8'
    javadoc.options.addStringOption('Xdoclint:all,-missing', '-quiet')
  }

  project.afterEvaluate {
    // Handle javadoc dependencies across projects. Order matters: the linksOffline for
    // org.elasticsearch:elasticsearch must be the last one or all the links for the
    // other packages (e.g org.elasticsearch.client) will point to server rather than
    // their own artifacts.
    if (project.plugins.hasPlugin(BuildPlugin) || project.plugins.hasPlugin(PluginBuildPlugin)) {
      String artifactsHost = VersionProperties.elasticsearch.endsWith("-SNAPSHOT") ? "https://snapshots.elastic.co" : "https://artifacts.elastic.co"
      Closure sortClosure = { a, b -> b.group <=> a.group }
      Closure depJavadocClosure = { shadowed, dep ->
        if ((dep instanceof ProjectDependency) == false) {
          return
        }
        Project upstreamProject = dep.dependencyProject
        if (upstreamProject == null) {
          return
        }
        if (shadowed) {
          /*
           * Include the source of shadowed upstream projects so we don't
           * have to publish their javadoc.
           */
          project.evaluationDependsOn(upstreamProject.path)
          project.javadoc.source += upstreamProject.javadoc.source
          /*
           * Instead we need the upstream project's javadoc classpath so
           * we don't barf on the classes that it references.
           */
          project.javadoc.classpath += upstreamProject.javadoc.classpath
        } else {
          // Link to non-shadowed dependant projects
          project.javadoc.dependsOn "${upstreamProject.path}:javadoc"
          String artifactPath = dep.group.replaceAll('\\.', '/') + '/' + dep.name.replaceAll('\\.', '/') + '/' + dep.version
          project.javadoc.options.linksOffline artifactsHost + "/javadoc/" + artifactPath, "${upstreamProject.buildDir}/docs/javadoc/"
        }
      }
      boolean hasShadow = project.plugins.hasPlugin(ShadowPlugin)
      project.configurations.compile.dependencies
          .findAll()
          .toSorted(sortClosure)
          .each({ c -> depJavadocClosure(false, c) })
      project.configurations.compileOnly.dependencies
          .findAll()
          .toSorted(sortClosure)
          .each({ c -> depJavadocClosure(false, c) })
      if (hasShadow) {
        project.configurations.bundle.dependencies
            .findAll()
            .toSorted(sortClosure)
            .each({ c -> depJavadocClosure(true, c) })
      }
    }
  }
}

// Ensure similar tasks in dependent projects run first. The projectsEvaluated here is
// important because, while dependencies.all will pickup future dependencies,
// it is not necessarily true that the task exists in both projects at the time
// the dependency is added.
gradle.projectsEvaluated {
  allprojects {
    if (project.path == ':test:framework') {
      // :test:framework:test cannot run before and after :server:test
      return
    }
    if (tasks.findByPath('test') != null && tasks.findByPath('integTest') != null) {
      integTest.mustRunAfter test
    }
    configurations.matching { it.canBeResolved }.all { Configuration configuration ->
      dependencies.matching { it instanceof ProjectDependency }.all { ProjectDependency dep ->
        Project upstreamProject = dep.dependencyProject
        if (upstreamProject != null) {
          if (project.path == upstreamProject.path) {
            // TODO: distribution integ tests depend on themselves (!), fix that
            return
          }
          for (String taskName : ['test', 'integTest']) {
            Task task = project.tasks.findByName(taskName)
            Task upstreamTask = upstreamProject.tasks.findByName(taskName)
            if (task != null && upstreamTask != null) {
              task.shouldRunAfter(upstreamTask)
            }
          }
        }
      }
    }
  }
}

// intellij configuration
allprojects {
  apply plugin: 'idea'

  if (isIdea) {
    project.buildDir = file('build-idea')
  }
  idea {
    module {
      inheritOutputDirs = false
      outputDir = file('build-idea/classes/main')
      testOutputDir = file('build-idea/classes/test')

      // also ignore other possible build dirs
      excludeDirs += file('build')
      excludeDirs += file('build-eclipse')
    }
  }

  tasks.named('cleanIdea') {
      delete 'build-idea'
  }
}

idea {
  project {
    vcs = 'Git'
  }
}

// eclipse configuration
allprojects {
  apply plugin: 'eclipse'
  // Name all the non-root projects after their path so that paths get grouped together when imported into eclipse.
  if (path != ':') {
    eclipse.project.name = path
    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
      eclipse.project.name = eclipse.project.name.replace(':', '_')
    }
  }

  plugins.withType(JavaBasePlugin) {
    File eclipseBuild = project.file('build-eclipse')
    eclipse.classpath.defaultOutputDir = eclipseBuild
    if (isEclipse) {
      // set this so generated dirs will be relative to eclipse build
      project.buildDir = eclipseBuild
      // Work around https://docs.gradle.org/current/userguide/java_gradle_plugin.html confusing Eclipse by the metadata
      // it adds to the  classpath
      project.file("$buildDir/pluginUnderTestMetadata").mkdirs()
    }
    eclipse.classpath.file.whenMerged { classpath ->
      // give each source folder a unique corresponding output folder
      int i = 0;
      classpath.entries.findAll { it instanceof SourceFolder }.each { folder ->
        i++;
        // this is *NOT* a path or a file.
        folder.output = "build-eclipse/" + i
      }
    }
  }

  File licenseHeaderFile;
  String prefix = ':x-pack';

  if (Os.isFamily(Os.FAMILY_WINDOWS)) {
    prefix = prefix.replace(':', '_')
  }
  if (eclipse.project.name.startsWith(prefix)) {
      licenseHeaderFile = new File(project.rootDir, 'buildSrc/src/main/resources/license-headers/elastic-license-header.txt')
  } else {
      licenseHeaderFile = new File(project.rootDir, 'buildSrc/src/main/resources/license-headers/oss-license-header.txt')
  }

  String lineSeparator = Os.isFamily(Os.FAMILY_WINDOWS) ? '\\\\r\\\\n' : '\\\\n'
  String licenseHeader = licenseHeaderFile.getText('UTF-8').replace(System.lineSeparator(), lineSeparator)
  tasks.register('copyEclipseSettings', Copy) {
    mustRunAfter 'wipeEclipseSettings'
    // TODO: "package this up" for external builds
    from new File(project.rootDir, 'buildSrc/src/main/resources/eclipse.settings')
    into '.settings'
    filter{ it.replaceAll('@@LICENSE_HEADER_TEXT@@', licenseHeader)}
  }
  // otherwise .settings is not nuked entirely
  tasks.register('wipeEclipseSettings', Delete) {
    delete '.settings'
  }
  tasks.named('cleanEclipse') { dependsOn 'wipeEclipseSettings' }
  // otherwise the eclipse merging is *super confusing*
  tasks.named('eclipse') { dependsOn 'cleanEclipse', 'copyEclipseSettings' }
}

allprojects {
  /*
   * IntelliJ and Eclipse don't know about the shadow plugin so when we're
   * in "IntelliJ mode" or "Eclipse mode" switch "bundle" dependencies into
   * regular "compile" dependencies. This isn't needed for the project
   * itself because the IDE configuration is done by SourceSets but it is
   * *is* needed for projects that depends on the project doing the shadowing.
   * Without this they won't properly depend on the shadowed project.
   */
  if (isEclipse || isIdea) {
    project.plugins.withType(ShadowPlugin).whenPluginAdded {
      project.afterEvaluate {
        project.configurations.compile.extendsFrom project.configurations.bundle
      }
    }
  }
}

// we need to add the same --debug-jvm option as
// the real RunTask has, so we can pass it through
class Run extends DefaultTask {
  boolean debug = false

  @Option(
        option = "debug-jvm",
        description = "Enable debugging configuration, to allow attaching a debugger to elasticsearch."
  )
  public void setDebug(boolean enabled) {
    project.project(':distribution').run.clusterConfig.debug = enabled
  }
}
task run(type: Run) {
  dependsOn ':distribution:run'
  description = 'Runs elasticsearch in the foreground'
  group = 'Verification'
  impliesSubProjects = true
}

wrapper {
    distributionType = 'ALL'
    doLast {
        final DistributionLocator locator = new DistributionLocator()
        final GradleVersion version = GradleVersion.version(wrapper.gradleVersion)
        final URI distributionUri = locator.getDistributionFor(version, wrapper.distributionType.name().toLowerCase(Locale.ENGLISH))
        final URI sha256Uri = new URI(distributionUri.toString() + ".sha256")
        final String sha256Sum = new String(sha256Uri.toURL().bytes)
        wrapper.getPropertiesFile() << "distributionSha256Sum=${sha256Sum}\n"
        println "Added checksum to wrapper properties"
        // Update build-tools to reflect the Gradle upgrade
        // TODO: we can remove this once we have tests to make sure older versions work.
        project(':build-tools').file('src/main/resources/minimumGradleVersion').text = gradleVersion
        println "Updated minimum Gradle Version"
    }
}

gradle.projectsEvaluated {
  subprojects {
    /*
     * Remove assemble/dependenciesInfo on all qa projects because we don't
     * need to publish artifacts for them.
     */
    if (project.name.equals('qa') || project.path.contains(':qa:')) {
      maybeConfigure(project.tasks, 'assemble') {
        it.enabled = false
      }
      maybeConfigure(project.tasks, 'dependenciesInfo') {
        it.enabled = false
      }
    }
  }
  // Having the same group and name for distinct projects causes Gradle to consider them equal when resolving
  // dependencies leading to hard to debug failures. Run a check across all project to prevent this from happening.
  // see: https://github.com/gradle/gradle/issues/847
  Map coordsToProject = [:]
  project.allprojects.forEach { p ->
    String coords = "${p.group}:${p.name}"
    if (false == coordsToProject.putIfAbsent(coords, p)) {
      throw new GradleException(
              "Detected that two projects: ${p.path} and ${coordsToProject[coords].path} " +
                      "have the same name and group: ${coords}. " +
                      "This doesn't currently work correctly in Gradle, see: " +
                      "https://github.com/gradle/gradle/issues/847"
      )
    }
  }
}

allprojects {
  tasks.register('resolveAllDependencies') {
      dependsOn tasks.matching { it.name == "pullFixture"}
      doLast {
        configurations.findAll { it.isCanBeResolved() }.each { it.resolve() }
      }
  }

  // helper task to print direct dependencies of a single task
  project.tasks.addRule("Pattern: <taskName>Dependencies") { String taskName ->
    if (taskName.endsWith("Dependencies") == false) {
      return
    }
    if (project.tasks.findByName(taskName) != null) {
      return
    }
    String realTaskName = taskName.substring(0, taskName.length() - "Dependencies".length())
    Task realTask = project.tasks.findByName(realTaskName)
    if (realTask == null) {
      return
    }
    project.tasks.create(taskName) {
      doLast {
        println("${realTask.path} dependencies:")
        for (Task dep : realTask.getTaskDependencies().getDependencies(realTask)) {
          println("  - ${dep.path}")
        }
      }
    }
  }

  def checkPart1 = tasks.register('checkPart1')
  def checkPart2 = tasks.register('checkPart2')
  plugins.withId('lifecycle-base') {
      if (project.path.startsWith(":x-pack:")) {
          checkPart1.configure { dependsOn 'check' }
      } else {
          checkPart2.configure { dependsOn 'check' }
      }
  }
}