pipeline {
  agent {
    kubernetes {
      label 'bstein-dev-home'
      defaultContainer 'builder'
      yaml """
apiVersion: v1
kind: Pod
metadata:
  labels:
    app: bstein-dev-home
spec:
  nodeSelector:
    kubernetes.io/arch: arm64
    node-role.kubernetes.io/worker: "true"
  containers:
    - name: dind
      image: docker:27-dind
      securityContext:
        privileged: true
      env:
        - name: DOCKER_TLS_CERTDIR
          value: ""
      args:
        - --mtu=1400
        - --host=unix:///var/run/docker.sock
        - --host=tcp://0.0.0.0:2375
      volumeMounts:
        - name: dind-storage
          mountPath: /var/lib/docker
    - name: builder
      image: docker:27
      command: ["cat"]
      tty: true
      env:
        - name: DOCKER_HOST
          value: tcp://localhost:2375
        - name: DOCKER_TLS_CERTDIR
          value: ""
      volumeMounts:
        - name: workspace-volume
          mountPath: /home/jenkins/agent
        - name: docker-config-writable
          mountPath: /root/.docker
        - name: harbor-config
          mountPath: /docker-config
  volumes:
    - name: workspace-volume
      emptyDir: {}
    - name: docker-config-writable
      emptyDir: {}
    - name: dind-storage
      emptyDir: {}
    - name: harbor-config
      secret:
        secretName: harbor-bstein-robot
        items:
          - key: .dockerconfigjson
            path: config.json
"""
    }
  }
  environment {
    REGISTRY = 'registry.bstein.dev/bstein'
    FRONT_IMAGE = "${REGISTRY}/bstein-dev-home-frontend"
    BACK_IMAGE  = "${REGISTRY}/bstein-dev-home-backend"
    VERSION_TAG = 'dev'
    SEMVER = 'dev'
  }
  options {
    disableConcurrentBuilds()
  }
  triggers {
    // Poll every 2 minutes; notifyCommit can also trigger, but polling keeps it moving without webhook tokens.
    pollSCM('H/2 * * * *')
  }
  stages {
    stage('Checkout') {
      steps {
        checkout scm
      }
    }

    stage('Prep toolchain') {
      steps {
        container('builder') {
          sh '''
            set -euo pipefail
            apk add --no-cache bash git jq
            mkdir -p /root/.docker
            cp /docker-config/config.json /root/.docker/config.json
          '''
        }
      }
    }

    stage('Compute version') {
      steps {
        container('builder') {
          script {
            sh '''
              set -euo pipefail
              if git describe --tags --exact-match >/dev/null 2>&1; then
                SEMVER="$(git describe --tags --exact-match)"
              else
                BASE="$(jq -r '.version' frontend/package.json || echo '0.1.0')"
                SEMVER="${BASE}-${BUILD_NUMBER}"
              fi
              # Accept bare semver or leading v (with optional prerelease).
              if ! echo "$SEMVER" | grep -Eq '^v?[0-9]+\\.[0-9]+\\.[0-9]+([-.][0-9A-Za-z]+)?$'; then
                SEMVER="0.1.0-${BUILD_NUMBER}"
              fi
              echo "SEMVER=${SEMVER}" > build.env
            '''
            def props = readProperties file: 'build.env'
            env.SEMVER = props['SEMVER'] ?: "0.1.0-${env.BUILD_NUMBER}"
            env.VERSION_TAG = env.SEMVER
          }
        }
      }
    }

    stage('Buildx setup') {
      steps {
        container('builder') {
          sh '''
            set -euo pipefail
            for i in $(seq 1 10); do
              if docker info >/dev/null 2>&1; then
                break
              fi
              sleep 2
            done
            docker buildx create --name bstein-builder --driver docker-container --bootstrap --use || docker buildx use bstein-builder
          '''
        }
      }
    }

    stage('Build & push frontend') {
      steps {
        container('builder') {
          sh '''
            set -euo pipefail
            docker buildx build \
              --platform linux/arm64 \
              --tag "${FRONT_IMAGE}:${VERSION_TAG}" \
              --tag "${FRONT_IMAGE}:latest" \
              --file Dockerfile.frontend \
              --push \
              .
          '''
        }
      }
    }

    stage('Build & push backend') {
      steps {
        container('builder') {
          sh '''
            set -euo pipefail
            docker buildx build \
              --platform linux/arm64 \
              --tag "${BACK_IMAGE}:${VERSION_TAG}" \
              --tag "${BACK_IMAGE}:latest" \
              --file Dockerfile.backend \
              --push \
              .
          '''
        }
      }
    }
  }

  post {
    always {
      echo "Build complete for ${env.VERSION_TAG}"
    }
  }
}