// Copyright 2021-2023 Open Networking Foundation (ONF) and the ONF Contributors
//
// Licensed 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.

// voltha-2.x e2e tests for openonu-go
// uses bbsim to simulate OLT/ONUs

// [TODO] Update syntax below to the latest supported
library identifier: 'cord-jenkins-libraries@master',
    retriever: modernSCM([
      $class: 'GitSCMSource',
      remote: 'https://gerrit.opencord.org/ci-management.git'
])

//------------------//
//---]  GLOBAL  [---//
//------------------//
String clusterName = 'kind-ci' // was def

// -----------------------------------------------------------------------
// Intent:
// -----------------------------------------------------------------------
String branchName() {
    String name = 'voltha-2.12'

    // [TODO] Sanity check the target branch
    // if (name != jenkins.branch) { fatal }
    return(name)
}

// -----------------------------------------------------------------------
// Intent: Due to lack of a reliable stack trace, construct a literal.
//         Jenkins will re-write the call stack for serialization.
// -----------------------------------------------------------------------
String getIam(String func) {
    String branchName = branchName()
    String src = [
        'ci-management',
        'jjb',
        'pipeline',
        'voltha',
        branchName,
        'bbsim-tests.groovy'
    ].join('/')

    String name = [src, func].join('::')
    return(name)
}

// -----------------------------------------------------------------------
// Intent: Determine if working on a release branch.
//   Note: Conditional is legacy, should also check for *-dev or *-pre
// -----------------------------------------------------------------------
Boolean isReleaseBranch(String name) {
    // List modifiers = ['-dev', '-pre', 'voltha-x.y.z-pre']
    // if branchName in modifiers
    return(name != 'master') // OR branchName.contains('-')
}

// -----------------------------------------------------------------------
// Intent:
// -----------------------------------------------------------------------
void pgrep_proc(String proc) {

    println("** RAW PROCESS OUTPUT:")
    def stream = sh(returnStdout: true, script: 'ps faaux')
    println(stream)
    
    String cmd = [
	'pgrep',
	// '--older', 5, // switch not supported, nodes using older version
	'--list-full',
	"\"${proc}\"",
	';',
	'echo', 'DONE',
	';',
	'true',
    ].join(' ')

    println("** Running: ${cmd}")
    sh(
        returnStdout: true,
	"set +euo pipefail && ${cmd}"
    )
    return
}

// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
void pkill_proc(String proc) {
    String cmd = [
	'pkill',
	// switch not supported, nodes using older version
	// NOTE: pkill should not kill it-self
	// good old kill (ps | grep -v -e grep -e '$$-me') }
	// '--older', 5,
	'--echo',
	"\"${proc}\"",
    ].join(' ')

    println("** Running: ${cmd}")
    sh(""" if [[ \$(pgrep --count "${proc}") -gt 0 ]]; then "$cmd"; fi" """)
    return
}

// -----------------------------------------------------------------------
// Intent:
// -----------------------------------------------------------------------
void execute_test(testTarget, workflow, testLogging, teardown, testSpecificHelmFlags='') {
    String infraNamespace  = 'default'
    String volthaNamespace = 'voltha'
    String logsDir = "$WORKSPACE/${testTarget}"

    stage('IAM')
    {
        script
        {
            // Announce ourselves for log usability
            String iam = getIam('execute_test')
            println("${iam}: ENTER")
            println("${iam}: LEAVE")
        }
    }

    // -----------------------------------------------------------------------
    // Intent: Cleanup stale port-forwarding
    // -----------------------------------------------------------------------
    stage('Cleanup')    {
        if (teardown)   {
            timeout(15) {
                script  {
                    helmTeardown(['default', infraNamespace, volthaNamespace])
                }
	    } // timeout

            timeout(5) {
                script {
		    String iam = getIam('Cleanup')
		    println("${iam}: ENTER")

		    // remove orphaned port-forward from different namespaces
		    String proc = 'port-forw'
		    pgrep_proc(proc)
		    pkill_proc(proc)
		    pgrep_proc(proc) // proc count == 0
		    println("${iam}: LEAVE")
		} // script
	    } // timeout
        } // teardown
    } // stage('Cleanup')

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage('Deploy common infrastructure') {
        script {
            local dashargs = [
                'kpi_exporter.enabled=false',
                'dashboards.xos=false',
                'dashboards.onos=false',
                'dashboards.aaa=false',
                'dashboards.voltha=false',
            ].join(',')

            local promargs = [
                'prometheus.alertmanager.enabled=false',
                'prometheus.pushgateway.enabled=false',
            ].join(',')

            sh("""
    helm repo add onf https://charts.opencord.org
    helm repo update

    echo -e "\nwithMonitoring=[$withMonitoring]"
    if [ ${withMonitoring} = true ] ; then
      helm install nem-monitoring onf/nem-monitoring \
          --set ${promargs} \
          --set ${dashargs}
    fi
    """)
        } // script
    } // stage('Deploy Common Infra')

    // -----------------------------------------------------------------------
    // [TODO] Check onos_log output
    // -----------------------------------------------------------------------
    stage('Deploy Voltha') {
        if (teardown)      {
            timeout(10)    {
                script     {
		    String iam = getIam('Deploy Voltha')
		    String onosLog = "${logsDir}/onos-voltha-startup-combined.log"
sh("""
          mkdir -p ${logsDir}
          touch "$onosLog"
          echo "** kail-startup ENTER: \$(date)" > "$onosLog"

          # Intermixed output (tee -a &) may get conflusing but let(s) see
          # what messages are logged during startup.
          #  _TAG=kail-startup kail -n ${infraNamespace} -n ${volthaNamespace} >> "$onosLog" &
          _TAG=kail-startup kail -n ${infraNamespace} -n ${volthaNamespace} | tee -a "$onosLog" &
          """)

              // if we're downloading a voltha-helm-charts patch, then install from a local copy of the charts
              Boolean localCharts = false

		    if (volthaHelmChartsChange != ''
			|| gerritProject == 'voltha-helm-charts'
			|| isReleaseBranch(branch) // branch != 'master'
		    ) {
			localCharts = true
		    }

		    String branchName = branchName()
		    Boolean isRelease = isReleaseBranch(branch)
		    println([
			" ** localCharts=${localCharts}",
			"branchName=${branchName}",
			"branch=${branch}",
			"branch=isReleaseBranch=${isRelease}",
		    ].join(', '))

		    // -----------------------------------------------------------------------
		    // Rewrite localHelmFlags using array join, moving code around and
		    // refactoring into standalone functions
		    // -----------------------------------------------------------------------
		    // hudson.remoting.ProxyException: groovy.lang.MissingMethodException:
		    // No signature of method: java.lang.String.positive() is applicable for argument types: () values: []
		    // -----------------------------------------------------------------------
		    // NOTE temporary workaround expose ONOS node ports
		    // -----------------------------------------------------------------------
		    String localHelmFlags = [
			extraHelmFlags.trim(),
			"--set global.log_level=${logLevel.toUpperCase()}",
			'--set onos-classic.onosSshPort=30115',
			'--set onos-classic.onosApiPort=30120',
			'--set onos-classic.onosOfPort=31653',
			'--set onos-classic.individualOpenFlowNodePorts=true',
			testSpecificHelmFlags
		    ].join(' ')

		    println("** ${iam} localHelmFlags = ${localHelmFlags}")

		    if (gerritProject != '') {
			localHelmFlags = "${localHelmFlags} " + getVolthaImageFlags("${gerritProject}")
		    }

		    println("** ${iam}: ENTER")
		    volthaDeploy([
			infraNamespace: infraNamespace,
			volthaNamespace: volthaNamespace,
			workflow: workflow.toLowerCase(),
			withMacLearning: enableMacLearning.toBoolean(),
			extraHelmFlags: localHelmFlags,
			localCharts: localCharts,
			bbsimReplica: olts.toInteger(),
			dockerRegistry: registry,
		    ])
		    println("** ${iam}: LEAVE")
		} // script

        // -----------------------------------------------------------------------
        // Intent: Replacing P_IDS with pgrep/pkill is a step forward.
        // Why not simply use a pid file, capture _TAG=kail-startup above
        // Grep runs the risk of terminating stray commands (??-good <=> bad-??)
	// -----------------------------------------------------------------------
        script {
	    String proc = '_TAG=kail-startup'

	    println("${iam}: ENTER")
	    println("${iam}: Shutdown process $proc")
	    pgrep_proc(proc)
	    pkill_proc(proc)
	    println("${iam}: LEAVE")
        }

        // -----------------------------------------------------------------------
	// Bundle onos-voltha / kail logs
        // -----------------------------------------------------------------------
	sh("""
cat <<EOM

** -----------------------------------------------------------------------
** Combine an compress voltha startup log(s)
** -----------------------------------------------------------------------
EOM
          pushd "${logsDir}" || { echo "ERROR: pushd $logsDir failed"; exit 1; }
          gzip -k onos-voltha-startup-combined.log
          rm onos-voltha-startup-combined.log
          popd
        """)
    } // timeout(10)


        // -----------------------------------------------------------------------
        // -----------------------------------------------------------------------
        sh """
      JENKINS_NODE_COOKIE="dontKillMe" _TAG="voltha-voltha-api" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${volthaNamespace} svc/voltha-voltha-api 55555:55555; done"&
      JENKINS_NODE_COOKIE="dontKillMe" _TAG="voltha-infra-etcd" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${infraNamespace} svc/voltha-infra-etcd 2379:2379; done"&
      JENKINS_NODE_COOKIE="dontKillMe" _TAG="voltha-infra-kafka" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${infraNamespace} svc/voltha-infra-kafka 9092:9092; done"&
      bbsimDmiPortFwd=50075
      for i in {0..${olts.toInteger() - 1}}; do
        JENKINS_NODE_COOKIE="dontKillMe" _TAG="bbsim\${i}" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${volthaNamespace} svc/bbsim\${i} \${bbsimDmiPortFwd}:50075; done"&
        ((bbsimDmiPortFwd++))
      done
      if [ ${withMonitoring} = true ] ; then
        JENKINS_NODE_COOKIE="dontKillMe" _TAG="nem-monitoring-prometheus-server" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n default svc/nem-monitoring-prometheus-server 31301:80; done"&
      fi
      ps aux | grep port-forward
      """
        script {
	    String proc = 'port-forward'

	    println("${iam}: ENTER")
	    println("Display spawned ${proc}")
	    pgrep_proc(proc)
	    println("${iam}: LEAVE")
	}

        // setting ONOS log level
        script {
            println('** setOnosLogLevels: ENTER')
		setOnosLogLevels([
                    onosNamespace: infraNamespace,
                    apps: [
                        'org.opencord.dhcpl2relay',
                        'org.opencord.olt',
                        'org.opencord.aaa',
                        'org.opencord.maclearner',
                        'org.onosproject.net.flowobjective.impl.FlowObjectiveManager',
                        'org.onosproject.net.flowobjective.impl.InOrderFlowObjectiveManager'
                    ],
                    logLevel: logLevel
                ])
                println('** setOnosLogLevels: LEAVE')
            } // script
        } // if (teardown)
    } // stage('Deploy Voltha')

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage("Run test ${testTarget} on workflow ${workflow}")
    {
        sh """
        echo -e "\n** Monitor using mem_consumption.py ?"

    if [ ${withMonitoring} = true ] ; then
      cat <<EOM

** -----------------------------------------------------------------------
** Monitoring memory usage with mem_consumption.py
** -----------------------------------------------------------------------
EOM
      mkdir -p "$WORKSPACE/voltha-pods-mem-consumption-${workflow}"
      cd "$WORKSPACE/voltha-system-tests"

      echo '** Installing python virtualenv'
      make venv-activate-patched

      set +u && source .venv/bin/activate && set -u
      # Collect initial memory consumption
      python scripts/mem_consumption.py -o $WORKSPACE/voltha-pods-mem-consumption-${workflow} -a 0.0.0.0:31301 -n ${volthaNamespace}
    fi

    echo -e '** Monitor memory consumption: LEAVE\n'
    """

        sh """
        echo -e "\n** make testTarget=[${testTarget}]"
    mkdir -p ${logsDir}
    export ROBOT_MISC_ARGS="-d ${logsDir} ${params.extraRobotArgs} "
    ROBOT_MISC_ARGS+="-v ONOS_SSH_PORT:30115 -v ONOS_REST_PORT:30120 -v NAMESPACE:${volthaNamespace} -v INFRA_NAMESPACE:${infraNamespace} -v container_log_dir:${logsDir} -v logging:${testLogging}"
    export KVSTOREPREFIX=voltha/voltha_voltha

    make -C "$WORKSPACE/voltha-system-tests" ${testTarget}
    """

        getPodsInfo("${logsDir}")

        sh """
      echo -e '\n** Gather robot Framework logs: ENTER'
      # set +e
      # collect logs collected in the Robot Framework StartLogging keyword
      cd ${logsDir}
      gzip *-combined.log
      rm -f *-combined.log

      echo -e '** Gather robot Framework logs: LEAVE\n'
    """

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    sh """
    echo -e '** Monitor pod-mem-consumption: ENTER'
    if [ ${withMonitoring} = true ] ; then
      cat <<EOM

** -----------------------------------------------------------------------
** Monitoring pod-memory-consumption using mem_consumption.py
** -----------------------------------------------------------------------
EOM
      cd "$WORKSPACE/voltha-system-tests"

      echo '** Installing python virtualenv'
      make venv-activate-patched

      set +u && source .venv/bin/activate && set -u
      # Collect memory consumption of voltha pods once all the tests are complete
      python scripts/mem_consumption.py -o $WORKSPACE/voltha-pods-mem-consumption-${workflow} -a 0.0.0.0:31301 -n ${volthaNamespace}
    fi
    echo -e '** Monitor pod-mem-consumption: LEAVE\n'
    """
    } // stage

    return
} // execute_test()

// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
def collectArtifacts(exitStatus) {
    script {
	String iam = getIam('collectArtifacts')
	println("${iam}: ENTER (exitStatus=${exitStatus})")
    }

    echo '''

** -----------------------------------------------------------------------
** collectArtifacts
** -----------------------------------------------------------------------
'''

    getPodsInfo("$WORKSPACE/${exitStatus}")

    sh """
  kubectl logs -n voltha -l app.kubernetes.io/part-of=voltha > $WORKSPACE/${exitStatus}/voltha.log
  """

    archiveArtifacts artifacts: '**/*.log,**/*.gz,**/*.txt,**/*.html,**/voltha-pods-mem-consumption-att/*,**/voltha-pods-mem-consumption-dt/*,**/voltha-pods-mem-consumption-tt/*'

    script {
	println("${iam}: ENTER")
	pgrep_proc('kail-startup')
	pkill_proc('kail')
	println("${iam}: LEAVE")
    }
    
    println("${iam}: ENTER RobotPublisher")
    step([$class: 'RobotPublisher',
	  disableArchiveOutput: false,
	  logFileName: '**/*/log*.html',
	  otherFiles: '',
	  outputFileName: '**/*/output*.xml',
	  outputPath: '.',
	  passThreshold: 100,
	  reportFileName: '**/*/report*.html',
	  unstableThreshold: 0,
	  onlyCritical: true]);
    println("${iam}: LEAVE RobotPublisher")

    println("${iam}: LEAVE (exitStatus=${exitStatus})")
    return
}

// -----------------------------------------------------------------------
// Intent: main
// -----------------------------------------------------------------------
pipeline {

  /* no label, executor is determined by JJB */
  agent {
    label "${params.buildNode}"
  }
  options {
    timeout(time: "${timeout}", unit: 'MINUTES')
  }
  environment {
    KUBECONFIG = "$HOME/.kube/kind-${clusterName}"
    VOLTCONFIG = "$HOME/.volt/config"
    PATH = "$PATH:$WORKSPACE/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
    DIAGS_PROFILE = 'VOLTHA_PROFILE'
    SSHPASS = 'karaf'
  }

  stages {
    stage('Download Code') {
      steps {
        getVolthaCode([
          branch: "${branch}",
          gerritProject: "${gerritProject}",
          gerritRefspec: "${gerritRefspec}",
          volthaSystemTestsChange: "${volthaSystemTestsChange}",
          volthaHelmChartsChange: "${volthaHelmChartsChange}",
        ])
      }
    }

    stage('Build patch v1.1')
    {
        // build the patch only if gerritProject is specified
        when
        {
            expression
            {
                return !gerritProject.isEmpty()
            }
        }

        steps
        {
            // NOTE that the correct patch has already been checked out
            // during the getVolthaCode step
            buildVolthaComponent("${gerritProject}")
        }
    }

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage('Install Kail')
    {
        steps
        {
            script
            {
	        String cmd = [
		    'make',
		    '--no-print-directory',
		    '-C', "$WORKSPACE/voltha-system-tests",
		    "KAIL_PATH=\"$WORKSPACE/bin\"",
		    'kail',
		].join(' ')

		println(" ** Running: ${cmd}")
		sh("${cmd}")
	    } // script
        } // steps
    } // stage

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage('Install Tools') {
        steps              {
            script         {
                String branchName = branchName()
		String iam = getIam('Install Tools')

                println("${iam}: ENTER (branch=$branch)")
                installKind(branch)   // needed early by stage(Cleanup)
                println("${iam}: LEAVE (branch=$branch)")
	    } // script
	} // steps
    } // stage

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage('Create K8s Cluster') {
        steps {
	    script {
                def clusterExists = sh(
                    returnStdout: true,
                    script: """kind get clusters | grep "${clusterName}" | wc -l""")

                if (clusterExists.trim() == '0') {
                    createKubernetesCluster([nodes: 3, name: clusterName])
                }
            } // script
        } // steps
    } // stage('Create K8s Cluster')

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage('Replace voltctl') {
        // if the project is voltctl, override the downloaded one with the built one
        when {
            expression { return gerritProject == 'voltctl' }
        }

        // Hmmmm(?) where did the voltctl download happen ?
        // Likely Makefile but would be helpful to document here.
        steps {
		script {
		    String iam = getIam('Replace voltctl')

		    println("${iam} Running: installVoltctl($branch)")
		    println("${iam}: ENTER")
		    installVoltctl("$branch")
		    println("${iam}: LEAVE")
		} // script
	    } // steps
    } // stage

    // -----------------------------------------------------------------------
    // -----------------------------------------------------------------------
    stage('Load image in kind nodes')
    {
        when {
	    expression { return !gerritProject.isEmpty() }
        }
        steps {
	    loadToKind()
        } // steps
    } // stage

    // -----------------------------------------------------------------------
    // [TODO] verify testing output
    // -----------------------------------------------------------------------
    stage('Parse and execute tests')
    {
        steps {
	    script {
		// Announce ourselves for log usability
		String iam = getIam('execute_test')
		println("${iam}: ENTER")

                def tests = readYaml text: testTargets

		String buffer = []    
		tests.eachWithIndex { test, idx ->
		    String  target = test['target']
		    buffer.add("      test[${idx}]: ${target}\n")
	        }

		println("** Testing index: tests-to-run")
		println(buffer)
		println('''
** -----------------------------------------------------------------------
** NOTE: For odd/silent job failures verify a few details
**   - All tests mentioned in the index have been processed.
**   - Test suites display ENTER/LEAVE mesasge pairs.
** -----------------------------------------------------------------------
''')
		tests.eachWithIndex { test, idx ->
                    println "** readYaml test suite[$idx]) test=[${test}]"

                    String  target      = test['target']
                    String  workflow    = test['workflow']
                    String  flags       = test['flags']
                    Boolean teardown    = test['teardown'].toBoolean()
                    Boolean logging     = test['logging'].toBoolean()
		    String  testLogging = (logging) ? 'True' : 'False'

                    print("""
** -----------------------------------------------------------------------
** Executing test ${target} on workflow ${workflow} with logging ${testLogging} and extra flags ${flags}
** -----------------------------------------------------------------------
""")

		    try {
			println "Executing test ${target}: ENTER"
			execute_test(target, workflow, testLogging, teardown, flags)
		    }
		    catch (Exception err) {
			println("** ${iam}: EXCEPTION ${err}")
		    }
		    finally {
			println "Executing test ${target}: LEAVE"
		    }

		    } // for

		    // Premature exit if this message is not logged
                    println("${iam}: LEAVE (testing ran to completion)")
                } // script
            } // steps
	} // stage
    } // stages

    post
    {
        aborted { collectArtifacts('aborted') }
        failure { collectArtifacts('failed')  }
        always  { collectArtifacts('always')  }
    }
} // pipeline

// EOF