pipeline {
    agent any

    environment {
        HARBOR       = 'registry.myriadcara.com'
        IMAGE        = 'registry.myriadcara.com/ecommerce/backend'
        VERSION_FILE = '/home/jenkins/vaishnavi-backend-version.txt'
        GIT_REPO     = 'https://gitea.myriadcara.com/subodh/vaishnavi-ecommerce-backend.git'
        GIT_BRANCH   = 'main'
    }

    stages {

        stage('Checkout') {
            steps {
                git(
                    url: "${GIT_REPO}",
                    branch: "${GIT_BRANCH}",
                    credentialsId: 'gitea-creds' 
                )
            }
        }

        stage('Generate Tag') {
            steps {
                script {
                    def exists = sh(
                        script: "test -f ${VERSION_FILE} && echo yes || echo no",
                        returnStdout: true
                    ).trim()

                    def version = (exists == 'yes')
                        ? sh(script: "cat ${VERSION_FILE}", returnStdout: true).trim()
                        : '1.0.0'

                    def parts  = version.tokenize('.')
                    def major  = parts[0].toInteger()
                    def minor  = parts[1].toInteger()
                    def patch  = parts[2].toInteger() + 1
                    def newVersion = "${major}.${minor}.${patch}"

                    sh "echo '${newVersion}' > ${VERSION_FILE}"
                    env.TAG = newVersion
                    echo "🏷️  New image tag: v${env.TAG}"
                }
            }
        }

        stage('Install Dependencies') {
            steps {
                sh '''
                    node --version
                    npm --version
                    npm ci --prefer-offline
                '''
            }
        }

        stage('Build Docker Image') {
            steps {
                sh """
                    docker build \\
                        -t ${IMAGE}:${env.TAG} \\
                        -t ${IMAGE}:latest \\
                        --label build-number=${env.BUILD_NUMBER} \\
                        --label version=${env.TAG} \\
                        .
                """
            }
        }

        stage('Push to Harbor') {
            steps {
                withCredentials([usernamePassword(
                    credentialsId: 'harbor-creds',
                    usernameVariable: 'HARBOR_USER',
                    passwordVariable: 'HARBOR_PASS'
                )]) {
                    sh """
                        echo "\$HARBOR_PASS" | docker login ${HARBOR} -u "\$HARBOR_USER" --password-stdin
                        docker push ${IMAGE}:${env.TAG}
                        docker push ${IMAGE}:latest
                    """
                }
            }
        }
    }

    post {
        always {
            sh "docker rmi ${IMAGE}:${env.TAG} || true"
            sh "docker rmi ${IMAGE}:latest || true"
            cleanWs()
        }
        success {
            echo "✅ Successfully pushed: ${IMAGE}:${env.TAG}"
        }
        failure {
            echo "❌ Pipeline failed at tag: ${env.TAG}"
        }
    }
}