/*
 * 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.MavenFilteringHack
import org.elasticsearch.gradle.info.BuildParams

import java.nio.file.Files
import java.security.KeyPair
import java.security.KeyPairGenerator

import static org.elasticsearch.gradle.PropertyNormalization.IGNORE_VALUE

apply plugin: 'elasticsearch.standalone-rest-test'
apply plugin: 'elasticsearch.rest-test'
apply plugin: 'elasticsearch.test.fixtures'

// TODO think about flattening qa:google-cloud-storage project into parent
dependencies {
  testCompile project(path: ':plugins:repository-gcs')
}

testFixtures.useFixture(':test:fixtures:gcs-fixture')
boolean useFixture = false

String gcsServiceAccount = System.getenv("google_storage_service_account")
String gcsBucket = System.getenv("google_storage_bucket")
String gcsBasePath = System.getenv("google_storage_base_path")

File serviceAccountFile = null
if (!gcsServiceAccount && !gcsBucket && !gcsBasePath) {
  serviceAccountFile = new File(project.buildDir, 'generated-resources/service_account_test.json')
  gcsBucket = 'bucket'
  gcsBasePath = 'integration_test'
  useFixture = true
} else if (!gcsServiceAccount || !gcsBucket || !gcsBasePath) {
  throw new IllegalArgumentException("not all options specified to run tests against external GCS service are present")
} else {
  serviceAccountFile = new File(gcsServiceAccount)
}

def encodedCredentials = {
  Base64.encoder.encodeToString(Files.readAllBytes(serviceAccountFile.toPath()))
}

def fixtureAddress = { fixture ->
  assert useFixture: 'closure should not be used without a fixture'
  int ephemeralPort = project(':test:fixtures:gcs-fixture').postProcessFixture.ext."test.fixtures.${fixture}.tcp.80"
  assert ephemeralPort > 0
  'http://127.0.0.1:' + ephemeralPort
}

/** A service account file that points to the Google Cloud Storage service emulated by the fixture **/
task createServiceAccountFile() {
  doLast {
    KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA")
    keyPairGenerator.initialize(1024)
    KeyPair keyPair = keyPairGenerator.generateKeyPair()
    String encodedKey = Base64.getEncoder().encodeToString(keyPair.private.getEncoded())

    serviceAccountFile.parentFile.mkdirs()
    serviceAccountFile.setText("{\n" +
      '  "type": "service_account",\n' +
      '  "project_id": "integration_test",\n' +
      '  "private_key_id": "' + UUID.randomUUID().toString() + '",\n' +
      '  "private_key": "-----BEGIN PRIVATE KEY-----\\n' + encodedKey + '\\n-----END PRIVATE KEY-----\\n",\n' +
      '  "client_email": "integration_test@appspot.gserviceaccount.com",\n' +
      '  "client_id": "123456789101112130594"\n' +
      '}', 'UTF-8')
  }
}

task thirdPartyTest(type: Test) {
  if (useFixture) {
    thirdPartyTest.dependsOn createServiceAccountFile
    nonInputProperties.systemProperty 'test.google.endpoint', "${-> fixtureAddress('gcs-fixture-third-party')}"
    nonInputProperties.systemProperty 'test.google.tokenURI', "${-> fixtureAddress('gcs-fixture-third-party')}/o/oauth2/token"

    gradle.taskGraph.whenReady {
      if (it.hasTask(gcsThirdPartyTests)) {
        throw new IllegalStateException("Tried to run third party tests but not all of the necessary environment variables " +
          "'google_storage_service_account', 'google_storage_bucket', 'google_storage_base_path' are set.")
      }
    }
  }

  include '**/GoogleCloudStorageThirdPartyTests.class'
  systemProperty 'tests.security.manager', false
  systemProperty 'test.google.bucket', gcsBucket
  systemProperty 'test.google.base', gcsBasePath + "_third_party_tests_" + BuildParams.testSeed
  nonInputProperties.systemProperty 'test.google.account', "${-> encodedCredentials.call()}"
}

task gcsThirdPartyTests {
  dependsOn check
}

integTest.mustRunAfter(thirdPartyTest)
check.dependsOn thirdPartyTest

Map<String, Object> expansions = [
  'bucket': gcsBucket,
  'base_path': gcsBasePath + "_integration_tests"
]

processTestResources {
  inputs.properties(expansions)
  MavenFilteringHack.filter(it, expansions)
}

integTest {
  dependsOn project(':plugins:repository-gcs').bundlePlugin
}

testClusters.integTest {
  plugin file(project(':plugins:repository-gcs').bundlePlugin.archiveFile)

  keystore 'gcs.client.integration_test.credentials_file', serviceAccountFile, IGNORE_VALUE

  if (useFixture) {
    tasks.integTest.dependsOn createServiceAccountFile
    /* Use a closure on the string to delay evaluation until tests are executed */
    setting 'gcs.client.integration_test.endpoint', { "${-> fixtureAddress('gcs-fixture')}" }, IGNORE_VALUE
    setting 'gcs.client.integration_test.token_uri', { "${-> fixtureAddress('gcs-fixture')}/o/oauth2/token" }, IGNORE_VALUE
  } else {
    println "Using an external service to test the repository-gcs plugin"
  }
}