# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.
# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-gradle

name: Build and package

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

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      jarFiles: ${{ steps.jar_list.outputs.jarFiles }}
    steps:
      - uses: actions/checkout@v4

      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: 'temurin'
          cache: gradle

      # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582

      # Schritt 1: Erzeuge den Gradle Wrapper, falls dieser nicht vorhanden ist.
      - name: Generate Gradle Wrapper
        run: gradle wrapper --gradle-version 8.9

      # Schritt 2: Stelle sicher, dass das Wrapper-Skript ausführbar ist.
      - name: Make gradlew executable
        run: chmod +x gradlew

      # Schritt 3: Führe den Build mit dem Gradle Wrapper durch.
      - name: Build with Gradle Wrapper
        run: ./gradlew build

      # Speichere das Build-Verzeichnis als Artifakt, damit es im nächsten Job verfügbar ist.
      - name: Upload build/libs artifact
        uses: actions/upload-artifact@v4
        with:
          name: build-libs
          path: build/libs

      # Ermittle die Liste der erzeugten JAR-Dateien und speichere sie als JSON-Array in den Job-Outputs.
      - name: Get JAR files list
        id: jar_list
        run: |
          jarFiles=$(find build/libs -maxdepth 1 -name '*.jar' -exec basename {} \; | awk '{printf "\"%s\",", $0}')
          jarFiles="[${jarFiles%,}]"
          echo "Found JAR files: $jarFiles"
          echo "jarFiles=$jarFiles" >> $GITHUB_OUTPUT

  upload:
    needs: build
    runs-on: ubuntu-latest
    # Erstelle für jede gefundene JAR-Datei einen Matrix-Eintrag.
    strategy:
      matrix:
        jar: ${{ fromJson(needs.build.outputs.jarFiles) }}
    steps:
      # Lade das build/libs-Verzeichnis aus dem Build-Job herunter.
      - name: Download build/libs artifact
        uses: actions/download-artifact@v4
        with:
          name: build-libs
          path: build/libs

      # Lade die einzelne JAR-Datei (mit Originalnamen) als Artifakt hoch.
      - name: Upload artifact for ${{ matrix.jar }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.jar }}
          path: build/libs/${{ matrix.jar }}