# Generated by GitHub Copilot
#
# ci.yml — Build and test the calorie-counter backend
#
# Runs on every push to main and every PR targeting main.
# Produces a green/red signal that docker.yml waits for before building images.
#
# Runs on pi-runner (native ARM64) — no QEMU, no cross-compilation overhead.

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

# Cancel any in-progress CI run for the same ref so the single-capacity Pi
# runner is not blocked by a superseded run.
concurrency:
  group: ci-${{ gitea.ref }}
  cancel-in-progress: true

jobs:
  test:
    name: Build & test backend
    runs-on: pi-runner

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Java 21 LTS
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: '21'
          cache: maven

      # actions/setup-java installs the JDK but not Maven.
      # pi-runner has no pre-installed mvn — download the same version used
      # in backend/Dockerfile to keep the build environment consistent.
      - name: Install Maven 3.9.9
        run: |
          curl -fsSL https://archive.apache.org/dist/maven/maven-3/3.9.9/binaries/apache-maven-3.9.9-bin.tar.gz \
            | tar -xz -C /opt
          echo "/opt/apache-maven-3.9.9/bin" >> $GITHUB_PATH

      - name: Run tests
        working-directory: backend
        run: mvn -q -ntp clean verify