/*
 * 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.test.RestIntegTestTask
import org.elasticsearch.gradle.Version

apply plugin: 'elasticsearch.standalone-test'

// This is a top level task which we will add dependencies to below.
// It is a single task that can be used to backcompat tests against all versions.
task bwcTest {
  description = 'Runs backwards compatibility tests.'
  group = 'verification'
}

for (Version version : versionCollection.versionsWireCompatibleWithCurrent) {
  String baseName = "v${version}"

  Task oldClusterTest = tasks.create(name: "${baseName}#oldClusterTest", type: RestIntegTestTask) {
    mustRunAfter(precommit)
  }

  Object extension = extensions.findByName("${baseName}#oldClusterTestCluster")
  configure(extensions.findByName("${baseName}#oldClusterTestCluster")) {
    distribution = 'zip'
    bwcVersion = version
    numBwcNodes = 2
    numNodes = 2
    clusterName = 'rolling-upgrade'
    setting 'repositories.url.allowed_urls', 'http://snapshot.test*'
    if (version.onOrAfter('5.3.0')) {
      setting 'http.content_type.required', 'true'
    }
  }

  Task oldClusterTestRunner = tasks.getByName("${baseName}#oldClusterTestRunner")
  oldClusterTestRunner.configure {
    systemProperty 'tests.rest.suite', 'old_cluster'
  }

  Task mixedClusterTest = tasks.create(name: "${baseName}#mixedClusterTest", type: RestIntegTestTask)

  configure(extensions.findByName("${baseName}#mixedClusterTestCluster")) {
    dependsOn oldClusterTestRunner, "${baseName}#oldClusterTestCluster#node1.stop"
    distribution = 'zip'
    clusterName = 'rolling-upgrade'
    unicastTransportUri = { seedNode, node, ant -> oldClusterTest.nodes.get(0).transportUri() }
    minimumMasterNodes = { 2 }
    /* Override the data directory so the new node always gets the node we
     * just stopped's data directory. */
    dataDir = { nodeNumber -> oldClusterTest.nodes[1].dataDir }
    setting 'repositories.url.allowed_urls', 'http://snapshot.test*'
  }

  Task mixedClusterTestRunner = tasks.getByName("${baseName}#mixedClusterTestRunner")
  mixedClusterTestRunner.configure {
    systemProperty 'tests.rest.suite', 'mixed_cluster'
    finalizedBy "${baseName}#oldClusterTestCluster#node0.stop"
  }

  Task upgradedClusterTest = tasks.create(name: "${baseName}#upgradedClusterTest", type: RestIntegTestTask) {
    dependsOn(mixedClusterTestRunner, "${baseName}#oldClusterTestCluster#node0.stop")
  }

  configure(extensions.findByName("${baseName}#upgradedClusterTestCluster")) {
    distribution = 'zip'
    clusterName = 'rolling-upgrade'
    unicastTransportUri = { seedNode, node, ant -> mixedClusterTest.nodes.get(0).transportUri() }
    minimumMasterNodes = { 2 }
    /* Override the data directory so the new node always gets the node we
     * just stopped's data directory. */
    dataDir = { nodeNumber -> oldClusterTest.nodes[0].dataDir}
    setting 'repositories.url.allowed_urls', 'http://snapshot.test*'
  }

  Task upgradedClusterTestRunner = tasks.getByName("${baseName}#upgradedClusterTestRunner")
  upgradedClusterTestRunner.configure {
    systemProperty 'tests.rest.suite', 'upgraded_cluster'
    // only need to kill the mixed cluster tests node here because we explicitly told it to not stop nodes upon completion
    finalizedBy "${baseName}#mixedClusterTestCluster#stop"
  }

  Task versionBwcTest = tasks.create(name: "${baseName}#bwcTest") {
    enabled = project.bwc_tests_enabled
    dependsOn = [upgradedClusterTest]
  }

  if (project.bwc_tests_enabled) {
    bwcTest.dependsOn(versionBwcTest)
  }
}

test.enabled = false // no unit tests for rolling upgrades, only the rest integration test

// basic integ tests includes testing bwc against the most recent version
task integTest {
  if (project.bwc_tests_enabled) {
    for (final def version : versionCollection.basicIntegrationTestVersions) {
      dependsOn "v${version}#bwcTest"
    }
  }
}

check.dependsOn(integTest)