#!groovy

/**
 * Deploy components to the D4Science Infrastructure (dev-only)
 *
 * Roberto Cirillo (ISTI-CNR)
 */

// related jenkins job: https://jenkins.d4science.org/job/gCubeDeployer/

def agent_root_folder = '/var/lib/jenkins'
def agent_deploy_filename = 'deploy.csv'
def agent_deploy_backup_filename = 'deploy.bck'

def deployList
def backupList
if (params.deployFile) {
    println "Using custom deploy file"
    deployList = params.deployFile
} else {
    println "Using local deploy file"
    //load the report from local
     deployList = agent_root_folder+'/'+agent_deploy_filename;
     println "Load from local file ${deployList}"
}
backupList = agent_root_folder+'/'+agent_deploy_backup_filename;

//locate the targetHost file
//String targetHostURL = "https://code-repo.d4science.org/gCubeCI/gCubeDeployer/raw/branch/master/open/gcube-${gCube_release_version}.yaml"
//if (verbose)
//   println "Querying ${targetHostURL}"
//load the release file
//def text = targetHostURL.toURL().getText()



pipeline {
    agent {
        label 'CD'
    }
    options {
        ansiColor('xterm')
    }

    triggers {
//     every fifteen minutes (perhaps at :07, :22, :37, :52)
//       cron('H/15 * * * *')
//     once in every two hours slot between 9 AM and 5 PM every weekday (perhaps at 10:38 AM, 12:38 PM, 2:38 PM, 4:38 PM)
       cron('H H(9-16)/2 * * 1-5')
    }
    
    environment {
        AGENT_ROOT_FOLDER = "${agent_root_folder}"
        DEPLOY_ROOT_FOLDER ="${agent_root_folder}/ansible-repos/ansible-playbooks/d4science-ghn-cluster/CD"
        DEPLOY_FILE = "${agent_root_folder}/${agent_deploy_filename}"
        BACKUP_FILE = "${agent_root_folder}/${agent_deploy_backup_filename}"
        TRIGGER_JOB= "${params.TRIGGER_JOB}"
        TRIGGER_VERSION= "${params.TRIGGER_VERSION}"
        TRIGGER_HOST="${params.TRIGGER_HOST}"
        TRIGGER_CD="${params.TRIGGER_CD}"
    }

    parameters {
         string(name: 'TRIGGER_JOB',
                 defaultValue: '',
                 description: 'Name of the service or job to deploy')
         string(name: 'TRIGGER_VERSION',
                 defaultValue: '',
                 description: 'service version to deploy')
         string(name: 'TRIGGER_HOST',
                 defaultValue: '',
                 description: 'Target Host / Host group where deploy the service')
         booleanParam(name: 'TRIGGER_CD',
                 defaultValue: true,
                 description: 'Set to false to avoid current deploy')
        string(name: 'report',
                defaultValue: '',
                description: 'The deploy report. Leave blank to pull the build report from Git.')

    }

    stages {
        stage('Initialize environment') {
            steps {
                sh '''
                  date=`date`;
                '''
            }
        }
        stage('Deploy from system') {
            when{
                allOf{
                    triggeredBy 'TimerTrigger'
          // maybe we can add a new condition in order to consider the manual execution of this pipeline
                    environment name: 'IS_CRON', value: 'True'
                }
            }
            steps {
                echo 'Cron build enabled. Deploy from system ongoing'
                script {
                    // parse the report and extract the data
                    def components = getComponentsFromCSV(deployList)
                    if (components.size() > 0) {
                        for (component in components) {
                        	stage(component){
		    					println "Deploy on going of component: $component"
			                    catchError(buildResult: 'UNSTABLE', stageResult: 'UNSTABLE') {
			                        checkup("${component.name}", "${component.version}", "${component.host}");
            			            deploy("${component.name}", "${component.version}", "${component.host}");
                	    		}
                	    	}
                        }
                    }else{
                        println "No components found"
                    }
                }
                cleanup(DEPLOY_FILE,BACKUP_FILE);
            }
        }
        stage('Nothing to do ') {
            when{
                allOf{
                    triggeredBy 'TimerTrigger'
                    environment name: 'IS_CRON', value: 'False'
                }
            }
            steps {
                 echo 'Do Nothing: cron build disabled'
            }
        }
        stage('New pending deploy ') {
            when{
                environment name: 'IS_CRON', value: 'True'
                anyOf{
                    triggeredBy 'BuildUpstreamCause'
                    triggeredBy 'UpstreamCause'
                }
            }
            steps {
                sh '''
                   echo "Cron build enabled. New deploy of ${TRIGGER_JOB} - ${TRIGGER_VERSION} will be added to the deploy file"
                   touch $DEPLOY_FILE;
                   if grep -q \"\${TRIGGER_JOB}\" \${DEPLOY_FILE}; then
                       echo "component ${TRIGGER_JOB} already added. Nothing to add."                      
                   else
                       echo "${TRIGGER_JOB},${TRIGGER_VERSION},${TRIGGER_HOST}" >> ${DEPLOY_FILE}    
                   fi    
                '''
                
          // the following catch give always an error in order to return a feedback UNSTABLE to the final user since the deploy is still not performed      
                catchError(buildResult: 'UNSTABLE', stageResult: 'UNSTABLE') {
                	sh("""
                		exit 126;
                	""")
                }	
            }
        }
        stage('Deploy from job ') {
            when{
                environment name: 'IS_CRON', value: 'False';
                expression {
                    env.TRIGGER_CD.toBoolean()
            	}
                anyOf{
                    triggeredBy 'BuildUpstreamCause'
                    triggeredBy 'UpstreamCause'
                }
            }
            steps {
                 echo "Cron build disabled. New deploy of ${params.TRIGGER_JOB} - ${params.TRIGGER_VERSION} ongoing"
                 ansiColor("xterm") {
                     catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
                         checkup("${params.TRIGGER_JOB}", "${params.TRIGGER_VERSION}", "${params.TRIGGER_HOST}");
                         deploy("${params.TRIGGER_JOB}", "${params.TRIGGER_VERSION}", "${params.TRIGGER_HOST}");
                     }
                 }

            }
        }
        stage('Deploy manually ') {
            when{
                allOf{
                    environment name: 'IS_CRON', value: 'False';
                    triggeredBy 'UserIdCause'
                }
            }
            steps {
                 echo "Cron build disabled. Pipeline executed Manually. New deploy of ${params.TRIGGER_JOB} - ${params.TRIGGER_VERSION} ongoing"
                 ansiColor("xterm") {
                     catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
                         checkup("${params.TRIGGER_JOB}", "${params.TRIGGER_VERSION}", "${params.TRIGGER_HOST}");
                         deploy("${params.TRIGGER_JOB}", "${params.TRIGGER_VERSION}", "${params.TRIGGER_HOST}");
                     }
                 }

            }
        }
    }
    post {
        always {
            script {
                sh '''
                  echo 'Sending report'
                  '''
                  //cat ./${ACTION_DEPLOY_FILE}.csv
            }
        }
        success {
            echo 'The deploy pipeline worked!'

            emailext attachLog: true,//attachmentsPattern: "**/${ACTION_DEPLOY_FILE}.csv",
                    to: 'roberto.cirillo@isti.cnr.it',
                    subject: "[Jenkins-gCubeDeployer] Deploy report",
                    body: "${currentBuild.fullDisplayName}. Build time: ${currentBuild.durationString}. See ${env.BUILD_URL}. "
        }
        failure {
            echo 'The deploy pipeline has failed'
            emailext attachLog: true,
                    to: 'roberto.cirillo@isti.cnr.it',
                    subject: "[Jenkins-gCubeDeployer] deploy ${currentBuild.fullDisplayName} failed",
                    body: "Something is wrong with ${env.BUILD_URL}"
        }

    }
}


//parse a csv file formatted in this way: ComponentName,ComponentVersion, ComponentHost
def getComponentsFromCSV(def deployList) {
    def components = []
    if (fileExists("${deployList}")) {
        echo 'file found'
        readFile("${deployList}").split('\n').each { line, count->
            if (line.startsWith('#'))
                return
            def fields = line.split(',')
            components.add([
                    name    : fields[0],
                    version : fields[1],
                    host 	: fields[2]                    
            ]
            )                
         }
    } else {
        echo ' File Not found. Failing.'
    }                         
    return components                     
}

//launch ansible deploy
def deploy(String service, String version, String host){
    def now = new Date();
    println("Going to deploy the service "+service+" with version: "+version+" on target: "+host);
    def statusCode = sh( script: "cd $DEPLOY_ROOT_FOLDER;./deployService.sh $service $version $host;", returnStdout: true);
    sh("""
        echo " last exit code \$?";
    """)
    println("Deploy ended with status: "+statusCode);
}

//Implement a new method in order to check the input parameters
def checkup(String service, String version, String host){
    sh("""
        case "$version" in
        **SNAPSHOT) echo "version contains SNAPSHOT" ;;
        **latest) echo "version contains latest" ;;
        *		  ) echo "version without SNAPSHOT. EXIT WITHOUT DEPLOY "; exit 1;;
        esac
    """)
}
//clean and update the local deploy file
def cleanup(def DEPLOY_FILE, def BACKUP_FILE){
    sh '''
        echo "cleanup $DEPLOY_FILE";
        if [ -f ${DEPLOY_FILE} ]; then
            if [ -f ${BACKUP_FILE} ]; then
                echo "backup found: ${BACKUP_FILE} going to replace it";
                rm ${BACKUP_FILE};
            fi
            mv ${DEPLOY_FILE} ${BACKUP_FILE};
        else
            echo "deploy file empty"
        fi
    '''
}