#!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;

pipeline {
    agent {
        label 'CD'
    }
    triggers {
//     every fifteen minutes (perhaps at :07, :22, :37, :52)
       cron('H/15 * * * *')
//     once a day on the 1st and 15th of every month
//         cron ('H H 1,15 * *')
// once every two hours at 45 minutes past the hour starting at 9:45 AM and finishing at 3:45 PM every weekday.
// 		cron('45 9-20/2 * * 1-5')
    }
         //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 = "${agent_root_folder}"
        DEPLOY_FILE = "${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}"
    // maybe here define another param used to identify the target host. In this way the developer can change it from the job    
    }
    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 = parseCSVList(deployList)
                    if (components.size() > 0) {
                        for (component in components) {
                        	stage(component){
		    					println "Deploy on going of component: $component"
			                    catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
            	    		        sh "exit 0"
                	    		}
                        }
                    }else{
                        println "No components found"
                    }
                }
                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};
                    	rm ${DEPLOY_FILE};
                    else
                    	echo "deploy file empty"
                    fi		
                '''        
            }
        }
        stage('Nothing to do by System ') {
            when{
                allOf{
                    triggeredBy 'TimerTrigger'
                    environment name: 'IS_CRON', value: 'False'
                }
            }
            steps {
                 echo 'Do Nothing: cron build disabled'
            }
        }
        stage('Add 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}" >> ${DEPLOY_FILE}    
                   fi    
                '''
            }
        }
        stage('Deploy from job ') {
            when{
                environment name: 'IS_CRON', value: 'False'
                anyOf{
                    triggeredBy 'BuildUpstreamCause'
                    triggeredBy 'UpstreamCause'
                }
            }
            steps {
                 echo "Cron build disabled. New deploy of ${params.TRIGGER_JOB} - ${params.TRIGGER_VERSION} ongoing"
                 catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
                     sh "exit 0"
                }
                 
            }
        }
    }
    post {
        always {
            script {
                sh '''
                  echo ' jobs currently appended:'
                  '''
                  //cat ./${ACTION_DEPLOY_FILE}.csv
            }
        }
        success {
            echo 'The deploy pipeline worked!'

            emailext attachLog: true,//attachmentsPattern: "**/${ACTION_DEPLOY_FILE}.csv",
                    to: 'roberto.cirillo@isti.cnr.it',
                    subject: "Deploy report",
                    body: "${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 deploy D4S] deploy ${currentBuild.fullDisplayName} failed",
                    body: "Something is wrong with ${env.BUILD_URL}"
        }

    }
}


//parse a csv file formatted in this way: ComponentName,ComponentVersion
def parseCSVList(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]
            ]
            )                
         }
    } else {
        echo ' File Not found. Failing.'
    }                         
    return components                     
}

//Alternative way to append a text in a small file (not used)
def appendToFile(String fileName, String line) {
    def current = ""
    if (fileExists(fileName)) {
        current = readFile fileName
    }
    writeFile file: fileName, text: current + "\n" + line
}

/**
 * Appends the footer to the deploy file.
 */
def appendFooter( def File) {
    def now = new Date()
    sh("""
        echo "#---" >> $File
        echo "#generated by the gCubeDeploy pipeline  >> $File
        echo "#last update $now*" >> $File
     """)
}