pipeline {
    agent { 
        dockerfile true
    }
	
	parameters{
        gitParameter branchFilter: 'origin/(.*)', defaultValue: 'master', name: 'BRANCH', type: 'PT_BRANCH'
        buildSelector(
			defaultSelector: lastSuccessful(),
			description: 'Which build to use for copying artifacts',
			name: 'BUILD_SELECTOR'
		)
    }
	
    stages {
        stage('Copy prev build artifact') {
            steps {
                script {
                    if (currentBuild.previousBuild) {
                        try {
                            copyArtifacts(projectName: currentBuild.projectName,
                                          selector: specific("${currentBuild.previousBuild.number}"))
                            def previousFile = readFile(file: "TRAIN_winequality-red.csv")
                            echo("The current build is ${currentBuild.number}")
                            echo("The previous build artifact was: ${previousFile}")
                        } catch(err) {
                            // ignore error
                        }
                    }
                }
            }
        }
        stage('Copy') {
            steps {
                copyArtifacts projectName: 's444354-create-dataset'
                 copyArtifacts projectName: "s444354-training/${params.BRANCH}/", selector: buildParameter('BUILD_SELECTOR'), optional: true
                sh 'python3 ./evaluation.py'
                archiveArtifacts 'eval.csv, metrics.png'
				
				script {
                       	    	metric = sh (
                            	script: 'tail -1 eval.csv',
                        	returnStdout: true
                            	).trim()
                    	}
               
            }
        }
    }
    post {
        always {
            emailext body: "${currentBuild.currentResult}, metrics of MAE, MSE, RMSE: ${metric}", subject: '444354-evaluation build status', to: 'e19191c5.uam.onmicrosoft.com@emea.teams.ms'
        }
    }
}