# CI: Maven build + unit tests on every push/PR to main or master.
# CD: Build Docker image and push to GitHub Container Registry (ghcr.io) on push to main/master.
# Optional: SSH deploy when repository variable ENABLE_SSH_DEPLOY=true and deploy secrets are set.
#
# Repository variables (Settings → Secrets and variables → Actions → Variables):
#   ENABLE_SSH_DEPLOY = true   (optional; omit or false to skip deploy job)
#
# Optional deploy secrets (Settings → Secrets and variables → Actions → Secrets):
#   DEPLOY_HOST, DEPLOY_USER, DEPLOY_SSH_KEY, DEPLOY_SCRIPT
#   DEPLOY_SCRIPT: multiline shell to run on the server (e.g. cd /opt/app && docker compose pull && docker compose up -d)
#
# Pull the image as: ghcr.io/<owner>/<repo>:latest or :<git-sha>

name: CI/CD

on:
  push:
    branches: [main, master]
  pull_request:
    branches: [main, master]
  workflow_dispatch:

permissions:
  contents: read
  packages: write

env:
  JAVA_VERSION: "21"

jobs:
  build-and-test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up JDK
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: ${{ env.JAVA_VERSION }}
          cache: maven

      # Unit tests only; @EnabledIfEnvironmentVariable(RUN_INTEGRATION_TESTS) tests stay skipped unless you add a separate job with secrets.
      - name: Maven verify
        run: mvn -B -ntp verify

  docker-build-push:
    needs: build-and-test
    if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master')
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Image name (lowercase for GHCR)
        id: image
        run: |
          IMG=$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')
          echo "name=ghcr.io/${IMG}" >> "$GITHUB_OUTPUT"

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ${{ steps.image.outputs.name }}:latest
            ${{ steps.image.outputs.name }}:${{ github.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  deploy:
    needs: docker-build-push
    # Set ENABLE_SSH_DEPLOY=true in repo Variables to run this job; otherwise skipped.
    if: vars.ENABLE_SSH_DEPLOY == 'true'
    runs-on: ubuntu-latest
    # Optional: uncomment for manual approval gates (create "production" in Environments first).
    # environment: production
    steps:
      - name: Deploy over SSH
        uses: appleboy/ssh-action@v1.2.2
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: ${{ secrets.DEPLOY_USER }}
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          script: ${{ secrets.DEPLOY_SCRIPT }}