name: CI

on:
  push:
    branches:
      - "main"
    tags:
      - 'v*'
  pull_request:
    branches:
      - "main"

env:
  MAVEN_OPTS: "-Dhttps.protocols=TLSv1.2 -Dmaven.repo.local=${{ github.workspace }}/.m2/repository -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
  MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version --no-transfer-progress -DinstallAtEnd=true -DdeployAtEnd=true"
  # Docker image name; expects REGISTRY_URL like registry.example.com
  CI_REGISTRY_IMAGE: "${{ secrets.REGISTRY_URL }}/${{ github.repository }}"

jobs:
  compile:
    name: Compile
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Set up JDK
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: '25'
          cache: 'maven'

      - name: Cache Maven local repo and wrapper
        uses: actions/cache@v5
        with:
          path: |
            ~/.m2/repository
            .mvn
          key: m2-${{ runner.os }}-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            m2-${{ runner.os }}-

      - name: Compile
        run: |
          chmod +x ./mvnw
          ./mvnw $MAVEN_CLI_OPTS compile

  test:
    name: Test
    runs-on: ubuntu-latest
    needs: compile
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Set up JDK
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: '25'
          cache: 'maven'

      - name: Cache Maven local repo and wrapper
        uses: actions/cache@v5
        with:
          path: |
            ~/.m2/repository
            .mvn
          key: m2-${{ runner.os }}-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            m2-${{ runner.os }}-

      - name: Run tests
        run: |
          chmod +x ./mvnw
          ./mvnw $MAVEN_CLI_OPTS test

      - name: Upload test reports (artifact)
        if: always()
        uses: actions/upload-artifact@v5
        with:
          name: junit-reports
          path: |
            **/target/*-reports/TEST-*.xml
          if-no-files-found: ignore

  package:
    name: Package
    runs-on: ubuntu-latest
    needs: test
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Set up JDK
        uses: actions/setup-java@v5
        with:
          distribution: 'temurin'
          java-version: '25'
          cache: 'maven'

      - name: Cache Maven local repo and wrapper
        uses: actions/cache@v5
        with:
          path: |
            ~/.m2/repository
            .mvn
          key: m2-${{ runner.os }}-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            m2-${{ runner.os }}-

      - name: Build package (skip tests)
        run: |
          chmod +x ./mvnw
          ./mvnw $MAVEN_CLI_OPTS package -DskipTests=true

      - name: Upload Maven artifacts
        uses: actions/upload-artifact@v5
        with:
          name: maven-artifacts
          path: |
            target/netneutrality.jar
            startup.sh
          if-no-files-found: error

  docker-main:
    name: Docker Build and Push (main)
    runs-on: ubuntu-latest
    needs: package
    if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Download build artifacts
        uses: actions/download-artifact@v8
        with:
          name: maven-artifacts
          path: .

      - name: Log in to registry
        uses: docker/login-action@v4
        with:
          registry: ${{ secrets.REGISTRY_URL }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Build and push (main)
        uses: docker/build-push-action@v7
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: "${{ secrets.REGISTRY_URL }}/${{ secrets.REGISTRY_USER }}/netneutrality:main"

  docker-release:
    name: Docker Build and Push (release)
    runs-on: ubuntu-latest
    needs: package
    if: ${{ startsWith(github.ref, 'refs/tags/') }}
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Download build artifacts
        uses: actions/download-artifact@v8
        with:
          name: maven-artifacts
          path: .

      - name: Compute release version
        id: rel
        shell: bash
        run: |
          # Strip leading 'v' if present (e.g., v1.2.3 -> 1.2.3)
          ver="${GITHUB_REF_NAME#v}"
          echo "version=$ver" >> "$GITHUB_OUTPUT"

      - name: Log in to registry
        uses: docker/login-action@v4
        with:
          registry: ${{ secrets.REGISTRY_URL }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Build and push (release + latest)
        uses: docker/build-push-action@v7
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: |
            ${{ secrets.REGISTRY_URL }}/${{ secrets.REGISTRY_USER }}/netneutrality:${{ steps.rel.outputs.version }}
            ${{ secrets.REGISTRY_URL }}/${{ secrets.REGISTRY_USER }}/netneutrality:latest