Pipeline Triggers

pipeline {
    agent { label 'linux' }

    triggers {
        // Trigger 1: GitHub webhook — fires instantly when code is pushed
        // Requires the GitHub plugin and a webhook in the repo settings
        // GitHub sends a POST to http://YOUR-JENKINS-URL/github-webhook/
        githubPush()

        // Trigger 2: SCM polling — fallback while webhook is being set up
        // Check every 5 minutes — comment out once webhook is working
        pollSCM('H/5 * * * *')

        // Trigger 3: Nightly cron — full regression at 2 AM on weekdays
        // Runs regardless of whether any code was pushed that day
        cron('H 2 * * 1-5')

        // Trigger 4: Upstream — fire when risk-engine-build succeeds
        // Creates an automated chain: build job passes → this pipeline fires
        upstream(
            upstreamProjects: 'risk-engine-build',
            threshold: hudson.model.Result.SUCCESS
        )
    }

    environment {
        APP_NAME = 'risk-engine'
    }

    stages {

        stage('Identify Trigger') {
            steps {
                script {
                    // Inspect what triggered this build — useful for logs and decisions
                    def causes = currentBuild.getBuildCauses()
                    def triggerType = 'Unknown'

                    if (causes.any { it._class.contains('GitHubPushCause') }) {
                        triggerType = 'GitHub Push'
                    } else if (causes.any { it._class.contains('SCMTrigger') }) {
                        triggerType = 'SCM Poll'
                    } else if (causes.any { it._class.contains('TimerTrigger') }) {
                        triggerType = 'Scheduled (cron)'
                    } else if (causes.any { it._class.contains('UpstreamCause') }) {
                        triggerType = 'Upstream Job'
                    } else if (causes.any { it._class.contains('UserIdCause') }) {
                        triggerType = 'Manual trigger'
                    }

                    echo "Build triggered by: ${triggerType}"
                    currentBuild.description = "Triggered by: ${triggerType}"
                }
            }
        }

        stage('Checkout') {
            steps { checkout scm }
        }

        stage('Test') {
            steps { sh './gradlew test' }
            post {
                always { junit 'build/test-results/**/*.xml' }
            }
        }

        // Only run full regression suite on nightly scheduled builds
        // Skipped on push-triggered builds to keep feedback loops fast
        stage('Regression Suite') {
            when {
                triggeredBy 'TimerTrigger'
            }
            steps {
                echo 'Running full nightly regression suite...'
                sh './gradlew regressionTest'
            }
        }

        stage('Deploy') {
            when { branch 'main' }
            steps {
                sh "./deploy.sh staging ${BUILD_NUMBER}"
            }
        }

    }

    post {
        success { echo "${APP_NAME} build ${BUILD_NUMBER} passed" }
        failure { echo "${APP_NAME} build ${BUILD_NUMBER} failed" }
        always { cleanWs() }
    }

}