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: "trainResults.csv")
                            echo("The current build is ${currentBuild.number}")
                            echo("The previous build artifact was: ${previousFile}")
                        } catch(err) {
                            // ignore error
                        }
                    }
                }
            }
        }
        stage('Copy') {
            steps {
                copyArtifacts projectName: 's444417-create-dataset'
                copyArtifacts projectName: "s444417-training/${params.BRANCH}/", selector: buildParameter('BUILD_SELECTOR'), optional: true
                sh 'python3 ./src/evalScript.py'
                archiveArtifacts 'trainResults.csv, metrics.png'
                script {
                    metric = sh '''
                        script: 'tail -1 trainResults.csv',
                        returnStdout: true
                        ).trim()'''
                }
                
            }
        }
    }
    post {
        always {
            emailext body: "${currentBuild.currentResult}, (number, loss): ${metric}", subject: 's444417-evaluation build status', to: 'e19191c5.uam.onmicrosoft.com@emea.teams.ms'
        }
    }
}