/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 */
package system.health

import java.time.{Clock, Instant}

import org.junit.runner.RunWith
import org.scalatest.FlatSpec
import org.scalatest.junit.JUnitRunner
import common.TestHelpers
import common.Wsk
import common.WskActorSystem
import common.WskProps
import common.WskTestHelpers
import spray.json.DefaultJsonProtocol.IntJsonFormat
import spray.json.DefaultJsonProtocol.StringJsonFormat
import spray.json.pimpAny
import system.CloudantUtil

/**
 * Tests for Cloudant trigger service
 */
@RunWith(classOf[JUnitRunner])
class CloudantHealthFeedTests
    extends FlatSpec
    with TestHelpers
    with WskTestHelpers
    with WskActorSystem {

    val wskprops = WskProps()
    val wsk = new Wsk
    val myCloudantCreds = CloudantUtil.Credential.makeFromVCAPFile("cloudantNoSQLDB", this.getClass.getSimpleName)

    behavior of "Cloudant Health trigger service"

    it should "bind cloudant package and fire changes trigger using changes feed" in withAssetCleaner(wskprops) {
        (wp, assetHelper) =>
            implicit val wskprops = wp // shadow global props and make implicit
            val triggerName = s"dummyCloudantTrigger-${System.currentTimeMillis}"
            val packageName = "dummyCloudantPackage"
            val feed = "changes"

            try {
                CloudantUtil.setUp(myCloudantCreds)

                // the package cloudant should be there
                val packageGetResult = wsk.pkg.get("/whisk.system/cloudant")
                println("fetched package cloudant")
                packageGetResult.stdout should include("ok")

                // create package binding
                assetHelper.withCleaner(wsk.pkg, packageName) {
                    (pkg, name) => pkg.bind("/whisk.system/cloudant", name)
                }

                // create whisk stuff
                println(s"Creating trigger: $triggerName")
                val feedCreationResult = assetHelper.withCleaner(wsk.trigger, triggerName) {
                    (trigger, name) =>
                        trigger.create(name, feed = Some(s"$packageName/$feed"), parameters = Map(
                            "username" -> myCloudantCreds.user.toJson,
                            "password" -> myCloudantCreds.password.toJson,
                            "host" -> myCloudantCreds.host().toJson,
                            "dbname" -> myCloudantCreds.dbname.toJson))
                }
                feedCreationResult.stdout should include("ok")

                val activationsBeforeChange = wsk.activation.pollFor(N = 1, Some(triggerName)).length
                activationsBeforeChange should be(0)

                // create a test doc in the sample db
                CloudantUtil.createDocument(myCloudantCreds, "{\"test\":\"test_doc1\"}")
                val now = Instant.now(Clock.systemUTC())
                println(s"created a test doc at $now")

                // get activation list of the trigger, expecting exactly 1
                val activations = wsk.activation.pollFor(N = 1, Some(triggerName), retries = 30).length
                val nowPoll = Instant.now(Clock.systemUTC())
                println(s"Found activation size ($nowPoll): $activations")
                withClue("Change feed trigger count: ") { activations should be(1) }

                // delete the whisk trigger, which must also delete the feed
                wsk.trigger.delete(triggerName)

                // recreate the trigger now without the feed
                wsk.trigger.create(triggerName)

                // create a test doc in the sample db, this should not fire the trigger
                println("create another test doc")
                CloudantUtil.createDocument(myCloudantCreds, "{\"test\":\"test_doc2\"}")

                println("checking for new triggers (no new ones expected)")
                val activationsAfterDelete = wsk.activation.pollFor(N = 2, Some(triggerName)).length
                println(s"Found activation size after delete: $activationsAfterDelete")
                activationsAfterDelete should be(1)
            } finally {
                CloudantUtil.unsetUp(myCloudantCreds)
            }
    }

    it should "should not fail when specifying triggers above 1 Million" in withAssetCleaner(wskprops) {
        (wp, assetHelper) =>
            implicit val wskprops = wp // shadow global props and make implicit
            val triggerName = s"dummyCloudantTrigger-${System.currentTimeMillis}"
            val packageName = "dummyCloudantPackage"
            val feed = "changes"

            try {
                CloudantUtil.setUp(myCloudantCreds)

                val packageGetResult = wsk.pkg.get("/whisk.system/cloudant")
                println("Fetching cloudant package.")
                packageGetResult.stdout should include("ok")

                println("Creating cloudant package binding.")
                assetHelper.withCleaner(wsk.pkg, packageName) {
                    (pkg, name) => pkg.bind("/whisk.system/cloudant", name)
                }

                println(s"Creating trigger: $triggerName")
                val feedCreationResult = assetHelper.withCleaner(wsk.trigger, triggerName, confirmDelete = false) {
                    (trigger, name) =>
                        trigger.create(name, feed = Some(s"$packageName/$feed"), parameters = Map(
                            "username" -> myCloudantCreds.user.toJson,
                            "password" -> myCloudantCreds.password.toJson,
                            "host" -> myCloudantCreds.host().toJson,
                            "dbname" -> myCloudantCreds.dbname.toJson,
                            "maxTriggers" -> 100000000.toJson))
                }
                feedCreationResult.stdout should include("ok")

                // delete the whisk trigger, which will also delete the feed
                wsk.trigger.delete(triggerName)

            } finally {
                CloudantUtil.unsetUp(myCloudantCreds)
            }
    }


    it should "not deny trigger creation when choosing maxTrigger count set to infinity (-1)" in withAssetCleaner(wskprops) {

        (wp, assetHelper) =>
            implicit val wskprops = wp // shadow global props and make implicit
            val triggerName = s"dummyCloudantTrigger-${System.currentTimeMillis}"
            val packageName = "dummyCloudantPackage"
            val feed = "changes"

            try {

                CloudantUtil.setUp(myCloudantCreds)

                val packageGetResult = wsk.pkg.get("/whisk.system/cloudant")
                println("Fetching cloudant package.")
                packageGetResult.stdout should include("ok")

                println("Creating cloudant package binding.")
                assetHelper.withCleaner(wsk.pkg, packageName) {
                (pkg, name) => pkg.bind("/whisk.system/cloudant", name)
                }

                println(s"Creating trigger: $triggerName")
                val feedCreationResult = assetHelper.withCleaner(wsk.trigger, triggerName, confirmDelete = false) {
                (trigger, name) =>
                    trigger.create(name, feed = Some(s"$packageName/$feed"), parameters = Map(
                        "username" -> myCloudantCreds.user.toJson,
                        "password" -> myCloudantCreds.password.toJson,
                        "host" -> myCloudantCreds.host().toJson,
                        "dbname" -> myCloudantCreds.dbname.toJson,
                        "maxTriggers" -> -1.toJson),
                        expectedExitCode = 0)
                }
                feedCreationResult.stderr should not include("error")

                // delete the whisk trigger, which will also delete the feed
                wsk.trigger.delete(triggerName)

            } finally {
                CloudantUtil.unsetUp(myCloudantCreds)
            }

    }

}