pipeline {

    agent none

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

    environment {
        DEPLOY_PATH = getDeployPath()
        ENV_FILE_ID = getEnvFileId()
        TARGET_URL = getHealthUrl()
    }

    stages {

        stage('Checkout') {
            agent { label getAgentLabel() }
            steps {
                checkout scm
            }
        }

        stage('Inject Environment File') {
            agent { label getAgentLabel() }
            steps {
                configFileProvider(
                    [configFile(
                        fileId: ENV_FILE_ID,
                        targetLocation: 'src/environments/environment.ts',
                        replaceTokens: true
                    )]
                ) {
                    echo "Environment file injected for ${env.BRANCH_NAME}"
                }
            }
        }

        stage('Build Angular') {
            agent { label getAgentLabel() }
            steps {
                sh '''
                npm install
                ng build --configuration production --base-href /admin/
                '''
            }
        }

        stage('Deploy') {
            agent { label getAgentLabel() }
            steps {
                sh '''
                rm -rf $DEPLOY_PATH/*
                cp -r dist/portfolio-admin/browser/* $DEPLOY_PATH/
                sudo /usr/bin/systemctl reload nginx
                '''
            }
        }

        stage('Health Check') {
            agent { label getAgentLabel() }
            steps {
                sh """
                sleep 2
                curl -f ${TARGET_URL}
                """
            }
        }
    }

    post {
        failure {
            echo "Deployment failed!"
        }
        success {
            echo "Deployment successful!"
        }
    }
}

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

def getAgentLabel() {
    if (env.BRANCH_NAME == 'prod') {
        return 'oracle-prod'
    } else {
        return 'built-in'   // for develop
    }
}

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

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

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