pipeline {

    agent none

    options {
        buildDiscarder(logRotator(numToKeepStr: '10'))
        disableConcurrentBuilds()
    }

    stages {

        stage('Build & Test') {

            agent { label getAgentLabel() }

            environment {
                CHROME_BIN = "${getChromeBin()}"
            }

            stages {

                stage('Cleanup Workspace') {
                    steps { cleanWs() }
                }

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

                stage('Inject Environment File') {
                    when {
                        not {
                            anyOf {
                                branch pattern: "feature/.*", comparator: "REGEXP"
                                branch pattern: "bug/.*", comparator: "REGEXP"
                            }
                        }
                    }
                    steps {
                        configFileProvider([
                            configFile(
                                fileId: getEnvFileId(),
                                targetLocation: 'src/environments/environment.ts',
                                replaceTokens: true
                            )
                        ]) {
                            echo "Injected environment for ${env.BRANCH_NAME}"
                        }
                    }
                }

                stage('Install Dependencies') {
                    steps { sh 'npm ci' }
                }

                stage('Run Tests') {
                    when {
                        anyOf {
                            branch pattern: "feature/.*", comparator: "REGEXP"
                            branch pattern: "bug/.*", comparator: "REGEXP"
                            branch 'develop'
                            branch 'prod'
                            changeRequest()
                        }
                    }
                    steps {
                        sh 'npm run test -- --watch=false --browsers=ChromeHeadless'
                    }
                }

                stage('Build Angular App') {
                    when {
                        anyOf {
                            branch 'develop'
                            branch 'prod'
                            changeRequest()
                        }
                    }
                    steps {
                        sh 'ng build --configuration production --base-href /admin/'
                    }
                }
            }
        }

        stage('Production Approval') {
            when { branch 'prod' }
            steps {
                input message: 'Approve deployment to PRODUCTION?', ok: 'Deploy'
            }
        }

        stage('Deploy & Verify') {

            when {
                anyOf {
                    branch 'develop'
                    branch 'prod'
                }
            }

            agent { label getAgentLabel() }

            stages {

                stage('Deploy') {
                    steps {
                        sh """
                        rsync -av --delete dist/portfolio-admin/browser/ ${getDeployPath()}/
                        sudo /usr/bin/systemctl reload nginx
                        """
                    }
                }

                stage('Health Check') {
                    steps {
                        sh """
                        sleep 3
                        curl -f ${getHealthUrl()}
                        """
                    }
                }
            }
        }
    }

    post {
        success { echo "Deployment successful for ${env.BRANCH_NAME}" }
        failure { echo "Deployment failed for ${env.BRANCH_NAME}" }
    }
}

//
// -------- Helper Methods --------
//

def getAgentLabel() {
    return env.BRANCH_NAME == 'prod' ? 'oracle-prod' : 'built-in'
}

def getEnvFileId() {
    return env.BRANCH_NAME == 'prod' ? 'admin-prod-properties' : 'admin-uat-properties'
}

def getDeployPath() {
    return env.BRANCH_NAME == 'prod'
        ? "/var/www/bangararaju.kottedi.in/admin"
        : "/var/www/bangararaju.kottedi.in/admin"
}

def getHealthUrl() {
    return env.BRANCH_NAME == 'prod'
        ? "https://bangararaju.kottedi.in/admin"
        : "https://bangararaju-uat.kottedi.in/admin"
}

def getChromeBin() {
    return env.BRANCH_NAME == 'prod'
        ? "/snap/bin/chromium"
        : "/usr/bin/chromium"
}