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

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 : bwcVersions.indexCompatible) {
  String baseName = "v${version}"

  Task oldClusterTest = tasks.create(name: "${baseName}#oldClusterTest", type: RestIntegTestTask) {
    mustRunAfter(precommit)
  }
  tasks.getByName("${baseName}#oldClusterTestRunner").configure {
    systemProperty 'tests.is_old_cluster', 'true'
    systemProperty 'tests.old_cluster_version', version.toString().minus("-SNAPSHOT")
    systemProperty 'tests.path.repo', new File(buildDir, "cluster/shared/repo/" + baseName)
  }

  Object extension = extensions.findByName("${baseName}#oldClusterTestCluster")
  configure(extensions.findByName("${baseName}#oldClusterTestCluster")) {
    bwcVersion = version
    numBwcNodes = 2
    numNodes = 2
    clusterName = 'full-cluster-restart'

    // some tests rely on the translog not being flushed
    setting 'indices.memory.shard_inactive_time', '20m'

    if (version.onOrAfter('5.3.0')) {
      setting 'http.content_type.required', 'true'
    }
  }


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

  configure(extensions.findByName("${baseName}#upgradedClusterTestCluster")) {
    dependsOn oldClusterTest,
        "${baseName}#oldClusterTestCluster#node0.stop",
        "${baseName}#oldClusterTestCluster#node1.stop"
    clusterName = 'full-cluster-restart'

    // some tests rely on the translog not being flushed
    setting 'indices.memory.shard_inactive_time', '20m'

    numNodes = 2
    dataDir = { nodeNum -> oldClusterTest.nodes[nodeNum].dataDir }
    cleanShared = false // We want to keep snapshots made by the old cluster!
  }

  tasks.getByName("${baseName}#upgradedClusterTestRunner").configure {
    systemProperty 'tests.is_old_cluster', 'false'
    systemProperty 'tests.old_cluster_version', version.toString().minus("-SNAPSHOT")
    systemProperty 'tests.path.repo', new File(buildDir, "cluster/shared/repo")

  }

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

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

unitTest.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 bwcTestSnapshots {
  if (project.bwc_tests_enabled) {
    for (final def version : bwcVersions.unreleasedIndexCompatible) {
      dependsOn "v${version}#bwcTest"
    }
  }
}

check.dependsOn(bwcTestSnapshots)