import org.elasticsearch.gradle.test.NodeInfo
import org.elasticsearch.gradle.test.RestIntegTestTask
import org.elasticsearch.gradle.Version

import java.nio.charset.StandardCharsets
import java.util.regex.Matcher

// Apply the java plugin to this project so the sources can be edited in an IDE
apply plugin: 'elasticsearch.build'
test.enabled = false

dependencies {
  // "org.elasticsearch.plugin:x-pack-core:${version}" doesn't work with idea because the testArtifacts are also here
  testCompile project(path: xpackModule('core'), configuration: 'default')
  testCompile project(path: xpackModule('security'), configuration: 'runtime')
  testCompile project(path: xpackModule('core'), configuration: 'testArtifacts') // to be moved in a later commit
}

Closure waitWithAuth = { NodeInfo node, AntBuilder ant ->
    File tmpFile = new File(node.cwd, 'wait.success')

    // wait up to two minutes
    final long stopTime = System.currentTimeMillis() + (2 * 60000L);
    Exception lastException = null;
    int lastResponseCode = 0

    while (System.currentTimeMillis() < stopTime) {

        lastException = null;
        // we use custom wait logic here as the elastic user is not available immediately and ant.get will fail when a 401 is returned
        HttpURLConnection httpURLConnection = null;
        try {
            // TODO this sucks having to hardcode number of nodes, but node.config.numNodes isn't necessarily accurate for rolling
            httpURLConnection = (HttpURLConnection) new URL("http://${node.httpUri()}/_cluster/health?wait_for_nodes=3&wait_for_status=yellow").openConnection();
            httpURLConnection.setRequestProperty("Authorization", "Basic " +
                    Base64.getEncoder().encodeToString("test_user:x-pack-test-password".getBytes(StandardCharsets.UTF_8)));
            httpURLConnection.setRequestMethod("GET");
            httpURLConnection.setConnectTimeout(1000);
            httpURLConnection.setReadTimeout(30000); // read needs to wait for nodes!
            httpURLConnection.connect();
            lastResponseCode = httpURLConnection.getResponseCode()
            if (lastResponseCode == 200) {
                tmpFile.withWriter StandardCharsets.UTF_8.name(), {
                    it.write(httpURLConnection.getInputStream().getText(StandardCharsets.UTF_8.name()))
                }
                break;
            }
        } catch (Exception e) {
            logger.debug("failed to call cluster health", e)
            lastException = e
        } finally {
            if (httpURLConnection != null) {
                httpURLConnection.disconnect();
            }
        }

        // did not start, so wait a bit before trying again
        Thread.sleep(500L);
    }
    if (tmpFile.exists() == false) {
        final String message = "final attempt of calling cluster health failed [lastResponseCode=${lastResponseCode}]"
        if (lastException != null) {
            logger.error(message, lastException)
        } else {
            logger.error(message + " [no exception]")
        }
    }
    return tmpFile.exists()
}

Project mainProject = project

compileTestJava.options.compilerArgs << "-Xlint:-cast,-deprecation,-rawtypes,-try,-unchecked"

/**
 * Subdirectories of this project are test rolling upgrades with various
 * configuration options based on their name.
 */
subprojects {
  Matcher m = project.name =~ /with(out)?-system-key/
  if (false == m.matches()) {
    throw new InvalidUserDataException("Invalid project name [${project.name}]")
  }
  boolean withSystemKey = m.group(1) == null

  apply plugin: 'elasticsearch.standalone-test'

  // Use resources from the rolling-upgrade project in subdirectories
  sourceSets {
    test {
      java {
        srcDirs = ["${mainProject.projectDir}/src/test/java"]
      }
      resources {
        srcDirs = ["${mainProject.projectDir}/src/test/resources"]
      }
    }
  }

  String outputDir = "${buildDir}/generated-resources/${project.name}"

  // 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'
  }

  String output = "${buildDir}/generated-resources/${project.name}"
  task copyTestNodeKeystore(type: Copy) {
    from project(':x-pack:plugin:core')
            .file('src/test/resources/org/elasticsearch/xpack/security/transport/ssl/certs/simple/testnode.jks')
    into outputDir
  }

  for (Version version : bwcVersions.wireCompatible) {
    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")) {
      dependsOn copyTestNodeKeystore
      if (version.before('6.3.0')) {
          String depVersion = version;
          if (project.bwcVersions.unreleased.contains(version)) {
              depVersion += "-SNAPSHOT"
          }
          mavenPlugin 'x-pack', "org.elasticsearch.plugin:x-pack:${depVersion}"
      }
      String usersCli = version.before('6.3.0') ? 'bin/x-pack/users' : 'bin/elasticsearch-users'
      setupCommand 'setupTestUser', usersCli, 'useradd', 'test_user', '-p', 'x-pack-test-password', '-r', 'superuser'
      bwcVersion = version
      numBwcNodes = 3
      numNodes = 3
      minimumMasterNodes = { 3 }
      clusterName = 'rolling-upgrade'
      waitCondition = waitWithAuth
      setting 'xpack.monitoring.exporters._http.type', 'http'
      setting 'xpack.monitoring.exporters._http.enabled', 'false'
      setting 'xpack.monitoring.exporters._http.auth.username', 'test_user'
      setting 'xpack.monitoring.exporters._http.auth.password', 'x-pack-test-password'
      setting 'xpack.license.self_generated.type', 'trial'
      setting 'xpack.security.enabled', 'true'
      setting 'xpack.security.transport.ssl.enabled', 'true'
      setting 'xpack.security.authc.token.enabled', 'true'
      setting 'xpack.security.audit.enabled', 'true'
      setting 'xpack.security.audit.outputs', 'index'
      setting 'xpack.ssl.keystore.path', 'testnode.jks'
      setting 'xpack.ssl.keystore.password', 'testnode'
      dependsOn copyTestNodeKeystore
      extraConfigFile 'testnode.jks', new File(outputDir + '/testnode.jks')
      if (version.onOrAfter('7.0.0')) {
          setting 'xpack.security.authc.realms.file.file1.order', '0'
          setting 'xpack.security.authc.realms.native.native1.order', '1'
      } else {
          setting 'xpack.security.authc.realms.file1.type', 'file'
          setting 'xpack.security.authc.realms.file1.order', '0'
          setting 'xpack.security.authc.realms.native1.type', 'native'
          setting 'xpack.security.authc.realms.native1.order', '1'
      }

      if (withSystemKey) {
        if (version.onOrAfter('5.1.0') && version.before('6.0.0')) {
          // The setting didn't exist until 5.1.0
          setting 'xpack.security.system_key.required', 'true'
        }
        if (version.onOrAfter('6.0.0')) {
            keystoreFile 'xpack.watcher.encryption_key', "${mainProject.projectDir}/src/test/resources/system_key"
        } else {
            String systemKeyFile = version.before('6.3.0') ? 'x-pack/system_key' : 'system_key'
            extraConfigFile systemKeyFile, "${mainProject.projectDir}/src/test/resources/system_key"
            keystoreSetting 'xpack.security.authc.token.passphrase', 'token passphrase'
        }
        setting 'xpack.watcher.encrypt_sensitive_data', 'true'
      }
    }

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

    Closure configureUpgradeCluster = {String name, Task lastRunner, int stopNode, Closure unicastSeed ->
      configure(extensions.findByName("${baseName}#${name}")) {
        dependsOn lastRunner, "${baseName}#oldClusterTestCluster#node${stopNode}.stop"
        setupCommand 'setupTestUser', 'bin/elasticsearch-users', 'useradd', 'test_user', '-p', 'x-pack-test-password', '-r', 'superuser'
        clusterName = 'rolling-upgrade'
        unicastTransportUri = { seedNode, node, ant -> unicastSeed() }
        minimumMasterNodes = { 3 }
        /* Override the data directory so the new node always gets the node we
        * just stopped's data directory. */
        dataDir = { nodeNumber -> oldClusterTest.nodes[stopNode].dataDir }
        waitCondition = waitWithAuth
        setting 'xpack.monitoring.exporters._http.type', 'http'
        setting 'xpack.monitoring.exporters._http.enabled', 'false'
        setting 'xpack.monitoring.exporters._http.auth.username', 'test_user'
        setting 'xpack.monitoring.exporters._http.auth.password', 'x-pack-test-password'
        setting 'xpack.license.self_generated.type', 'trial'
        setting 'xpack.security.enabled', 'true'
        setting 'xpack.security.transport.ssl.enabled', 'true'
        setting 'xpack.ssl.keystore.path', 'testnode.jks'
        keystoreSetting 'xpack.ssl.keystore.secure_password', 'testnode'
        setting 'node.attr.upgraded', 'true'
        setting 'xpack.security.authc.token.enabled', 'true'
        setting 'xpack.security.audit.enabled', 'true'
        setting 'xpack.security.audit.outputs', 'index'
        setting 'node.name', "upgraded-node-${stopNode}"
        dependsOn copyTestNodeKeystore
        extraConfigFile 'testnode.jks', new File(outputDir + '/testnode.jks')
        if (withSystemKey) {
          setting 'xpack.watcher.encrypt_sensitive_data', 'true'
          keystoreFile 'xpack.watcher.encryption_key', "${mainProject.projectDir}/src/test/resources/system_key"
        }
        if (version.before('6.0.0')) {
          keystoreSetting 'xpack.security.authc.token.passphrase', 'token passphrase'
        }
      }
    }

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

    configureUpgradeCluster("oneThirdUpgradedTestCluster", oldClusterTestRunner, 0,
      // Use all running nodes as seed nodes so there is no race between pinging and the tests
      { oldClusterTest.nodes.get(1).transportUri() + ',' + oldClusterTest.nodes.get(2).transportUri() })

    Task oneThirdUpgradedTestRunner = tasks.getByName("${baseName}#oneThirdUpgradedTestRunner")
    oneThirdUpgradedTestRunner.configure {
      systemProperty 'tests.rest.suite', 'mixed_cluster'
      systemProperty 'tests.first_round', 'true'
      // We only need to run these tests once so we may as well do it when we're two thirds upgraded
      systemProperty 'tests.rest.blacklist', [
          'mixed_cluster/10_basic/Start scroll in mixed cluster on upgraded node that we will continue after upgrade',
          'mixed_cluster/30_ml_jobs_crud/Create a job in the mixed cluster and write some data',
          'mixed_cluster/40_ml_datafeed_crud/Put job and datafeed in mixed cluster',
        ].join(',')
      finalizedBy "${baseName}#oldClusterTestCluster#node1.stop"
    }

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

    configureUpgradeCluster("twoThirdsUpgradedTestCluster", oneThirdUpgradedTestRunner, 1,
      // Use all running nodes as seed nodes so there is no race between pinging and the tests
      { oldClusterTest.nodes.get(2).transportUri() + ',' + oneThirdUpgradedTest.nodes.get(0).transportUri() })

    Task twoThirdsUpgradedTestRunner = tasks.getByName("${baseName}#twoThirdsUpgradedTestRunner")
    twoThirdsUpgradedTestRunner.configure {
      systemProperty 'tests.rest.suite', 'mixed_cluster'
      systemProperty 'tests.first_round', 'false'
      finalizedBy "${baseName}#oldClusterTestCluster#node2.stop"
    }

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

    configureUpgradeCluster("upgradedClusterTestCluster", twoThirdsUpgradedTestRunner, 2,
      // Use all running nodes as seed nodes so there is no race between pinging and the tests
      { oneThirdUpgradedTest.nodes.get(0).transportUri() + ',' + twoThirdsUpgradedTest.nodes.get(0).transportUri() })

    Task upgradedClusterTestRunner = tasks.getByName("${baseName}#upgradedClusterTestRunner")
    upgradedClusterTestRunner.configure {
      systemProperty 'tests.rest.suite', 'upgraded_cluster'
      /*
       * Force stopping all the upgraded nodes after the test runner
       * so they are alive during the test.
       */
      finalizedBy "${baseName}#oneThirdUpgradedTestCluster#stop"
      finalizedBy "${baseName}#twoThirdsUpgradedTestCluster#stop"

      // migration tests should only run when the original/old cluster nodes where versions < 5.2.0.
      // this stinks but we do the check here since our rest tests do not support conditionals
      // otherwise we could check the index created version
      String versionStr = project.extensions.findByName("${baseName}#oldClusterTestCluster").properties.get('bwcVersion')
      String[] versionParts = versionStr.split('\\.')
      if (versionParts[0].equals("5")) {
          Integer minor = Integer.parseInt(versionParts[1])
          if (minor >= 2) {
              systemProperty 'tests.rest.blacklist', '/20_security/Verify default password migration results in upgraded cluster'
          }
      }
    }

    Task versionBwcTest = tasks.create(name: "${baseName}#bwcTest") {
      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 : bwcVersions.unreleasedWireCompatible) {
        dependsOn "v${version}#bwcTest"
      }
    }
  }
  check.dependsOn(integTest)

  dependencies {
    // "org.elasticsearch.plugin:x-pack-core:${version}" doesn't work with idea because the testArtifacts are also here
    testCompile project(path: xpackModule('core'), configuration: 'default')
    testCompile project(path: xpackModule('core'), configuration: 'testArtifacts')
    testCompile project(path: xpackModule('watcher'))
  }

  compileTestJava.options.compilerArgs << "-Xlint:-cast,-deprecation,-rawtypes,-try,-unchecked"

  // copy x-pack plugin info so it is on the classpath and security manager has the right permissions
  task copyXPackRestSpec(type: Copy) {
    dependsOn(project.configurations.restSpec, 'processTestResources')
    from project(xpackProject('plugin').path).sourceSets.test.resources
    include 'rest-api-spec/api/**'
    into project.sourceSets.test.output.resourcesDir
  }

  task copyXPackPluginProps(type: Copy) {
    dependsOn(copyXPackRestSpec)
    from project(xpackModule('core')).file('src/main/plugin-metadata')
    from project(xpackModule('core')).tasks.pluginProperties
    into outputDir
  }
  project.sourceSets.test.output.dir(outputDir, builtBy: copyXPackPluginProps)

  repositories {
    maven {
      url "https://artifacts.elastic.co/maven"
    }
    maven {
      url "https://snapshots.elastic.co/maven"
    }
  }
}