/*
 * 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 org.elasticsearch.gradle.vagrant.VagrantCommandTask
import org.elasticsearch.gradle.vagrant.BatsOverVagrantTask
import org.elasticsearch.gradle.FileContentsTask
import org.gradle.api.InvalidUserDataException

String testScripts = '*.bats'
String testCommand = "cd \$TESTROOT && sudo bats --tap \$BATS/$testScripts"
String smokeTestCommand = 'echo I work'
List<String> representativeBoxes = ['ubuntu-1404', 'centos-7']
List<String> boxes = representativeBoxes + ['ubuntu-1204', 'ubuntu-1504',
  'debian-8', 'centos-6', 'oel-7', 'fedora-22', 'opensuse-13', 'sles-12']

/* The version of elasticsearch that we upgrade *from* as part of testing
 * upgrades. */
String upgradeFromVersion = '2.0.0'

configurations {
  test
}

repositories {
  mavenCentral()
}

dependencies {
  test project(path: ':distribution:tar', configuration: 'archives')
  test project(path: ':distribution:rpm', configuration: 'archives')
  test project(path: ':distribution:deb', configuration: 'archives')

  // Collect all the plugins
  for (Project subproj : project.rootProject.subprojects) {
    if (subproj.path.startsWith(':plugins:')) {
      test project("${subproj.path}")
    }
  }

  // The version of elasticsearch that we upgrade *from*
  test "org.elasticsearch.distribution.deb:elasticsearch:$upgradeFromVersion@deb"
  test "org.elasticsearch.distribution.rpm:elasticsearch:$upgradeFromVersion@rpm"
}

task checkPackages {
  group 'Verification'
  description 'Check the packages against a representative sample of the ' +
    'linux distributions we have in our Vagrantfile'
}

task checkPackagesAllDistros {
  group 'Verification'
  description 'Check the packages against all the linux distributions we ' +
    'have in our Vagrantfile'
}

task clean(type: Delete) {
  group 'Build'
  delete buildDir
}

File testRoot = new File("$buildDir/testroot")
task createTestRoot {
  outputs.dir testRoot
  doLast {
    testRoot.mkdirs()
  }
}

task createVersionFile(type: FileContentsTask) {
  dependsOn createTestRoot
  file "${testRoot}/version"
  contents = version
}

task createUpgradeFromFile(type: FileContentsTask) {
  dependsOn createTestRoot
  file "${testRoot}/upgrade_from_version"
  contents = upgradeFromVersion
}

task prepareTestRoot(type: Copy) {
  description 'Dump bats test dependencies into the $TESTROOT'
  into testRoot
  from configurations.test

  dependsOn createVersionFile, createUpgradeFromFile
}

task checkVagrantVersion(type: Exec) {
  group 'Package Verification'
  description 'Check that the version of vagrant is ok'
  commandLine 'vagrant', '--version'
  standardOutput = new ByteArrayOutputStream()
  doLast {
    String version = standardOutput.toString().trim()
    if ((version ==~ /Vagrant 1\.[789]\..+/) == false) {
      throw new InvalidUserDataException(
        "Illegal version of vagrant [${version}]. Need [Vagrant 1.7+]")
    }
  }
}

task vagrantSmokeTest {
  group 'Vagrant'
  description 'Smoke test some representative distros from the Vagrantfile'
}

task vagrantSmokeTestAllDistros {
  group 'Vagrant'
  description 'Smoke test all distros from the Vagrantfile'
}

// Each box gets it own set of tasks
boxes.each { box ->
  String boxTask = taskifyBoxName box
  task "vagrantUp${boxTask}"(type: VagrantCommandTask) {
    group 'Vagrant'
    description "Startup a vagrant VM running ${box}"
    boxName box
    /* Its important that we try to reprovision the box even if it already
      exists. That way updates to the vagrant configuration take automatically.
      That isn't to say that the updates will always be compatible. Its ok to
      just destroy the boxes if they get busted but that is a manual step
      because its slow-ish. */
    /* We lock the provider to virtualbox because the Vagrantfile specifies
      lots of boxes that only work properly in virtualbox. Virtualbox is
      vagrant's default but its possible to change that default and folks do.
      But the boxes that we use are unlikely to work properly with other
      virtualization providers. Thus the lock. */
    commandLine 'up', box, '--provision', '--provider', 'virtualbox'
    /* It'd be possible to check if the box is already up here and output
      SKIPPED but that would require running vagrant status which is slow! */
    dependsOn checkVagrantVersion
  }
  task "vagrantHalt${boxTask}"(type: VagrantCommandTask) {
    group 'Vagrant'
    description "Shutdown the vagrant VM running $box"
    boxName box
    commandLine 'halt', box
  }

  task "smokeTest${boxTask}"(type: Exec) {
    group 'Vagrant'
    description "Smoke test the ${box} VM"
    dependsOn "vagrantUp${boxTask}"
    finalizedBy "vagrantHalt${boxTask}"
    commandLine 'vagrant', 'ssh', box, '--command',
      "set -o pipefail && ${smokeTestCommand} | sed -ue \'s/^/    ${box}: /'"
    vagrantSmokeTestAllDistros.dependsOn name
    if (representativeBoxes.contains(box)) {
      vagrantSmokeTest.dependsOn name
    }
  }

  task "check${boxTask}"(type: BatsOverVagrantTask) {
    group 'Package Verification'
    description "Run packaging tests against ${box}"
    dependsOn "vagrantUp${boxTask}"
    finalizedBy "vagrantHalt${boxTask}"
    boxName box
    command testCommand
    dependsOn prepareTestRoot
    checkPackagesAllDistros.dependsOn name
    if (representativeBoxes.contains(box)) {
      checkPackages.dependsOn name
    }
  }
}


// Twists the box name into a sensible task name
String taskifyBoxName(box) {
  box.capitalize().replace('-', '')
}