pipeline {
    agent any

    parameters {
        string(
            defaultValue: '100',
            description: 'The number of examples to keep in the dataset',
            name: 'CUTOFF'
        )
    }

    stages {
        stage('Preparation') { 
            when { expression { true } }
            steps {
                script {
                    try {
                        properties([
                            parameters([
                                string(
                                    defaultValue: '',
                                    description: 'Kaggle username',
                                    name: 'KAGGLE_USERNAME',
                                    trim: false
                                ),
                                password(
                                    defaultValue: '',
                                    description: 'Kaggle token taken from kaggle.json file, as described in https://github.com/Kaggle/kaggle-api#api-credentials',
                                    name: 'KAGGLE_KEY'
                                )
                            ])
                        ])
                    } catch (err) {
                        error "Failed to set up parameters: ${err.message}"
                    }
                }
            }
        }
        stage('Build') {
            when { expression { params.KAGGLE_USERNAME && params.KAGGLE_KEY } }
            steps {
                script {
                    try {
                        withEnv(["KAGGLE_USERNAME=${params.KAGGLE_USERNAME}",
                                "KAGGLE_KEY=${params.KAGGLE_KEY}" ]) {
                            sh 'echo KAGGLE_USERNAME: $KAGGLE_USERNAME'
                            sh '''
                                #!/bin/bash
                                pip install kaggle

                                kaggle datasets download -d nitishsharma01/olympics-124-years-datasettill-2020

                                unzip -o olympics-124-years-datasettill-2020.zip

                                echo "Processed Data" > output.txt

                                head -n ${params.CUTOFF} athlete_events.csv > athlete_events_cutoff.csv

                                mv athlete_events_cutoff.csv athlete_events.csv
                            '''
                        }
                    } catch (err) {
                        error "Failed to build: ${err.message}"
                    }
                }
            }
        }

        stage('Clone Git Repository') {
            when { expression { params.KAGGLE_USERNAME && params.KAGGLE_KEY } }
            steps {
                script {
                    try {
                        git 'https://git.wmi.amu.edu.pl/s487187/ium_487187.git'
                    } catch (err) {
                        error "Failed to clone repository: ${err.message}"
                    }
                }
            }
        }

        stage('End') {
            when { expression { params.KAGGLE_USERNAME && params.KAGGLE_KEY } }
            steps {
                echo 'Program ended!'
            }
        }
    }
    
    post {
        always {
            archiveArtifacts 'output.txt'
        }
    }
}