/*
 * 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.test.AntFixture

import java.security.KeyPair
import java.security.KeyPairGenerator

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

integTestCluster {
    plugin ':plugins:repository-gcs'
}

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_test'
    gcsBasePath = 'integration_test'
    useFixture = true
} else {
    serviceAccountFile = new File(gcsServiceAccount)
    if (serviceAccountFile.exists() == false || serviceAccountFile.canRead() == false) {
        throw new FileNotFoundException(gcsServiceAccount, "Google Storage service account file does not exist or is not readable")
    }
}

/** A task to start the GoogleCloudStorageFixture which emulates a Google Cloud Storage service **/
task googleCloudStorageFixture(type: AntFixture) {
    dependsOn testClasses
    env 'CLASSPATH', "${ -> project.sourceSets.test.runtimeClasspath.asPath }"
    executable = new File(project.runtimeJavaHome, 'bin/java')
    args 'org.elasticsearch.repositories.gcs.GoogleCloudStorageFixture', baseDir, 'bucket_test'
}

/** 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')
    }
}

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

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

integTestCluster {
    keystoreFile 'gcs.client.integration_test.credentials_file', "${serviceAccountFile.absolutePath}"

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