name: Build and Test j3270

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

jobs:
  build:
    name: Build JAR & Run Tests (Java ${{ matrix.java }})
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        java: [ '11', '17', '21' ]

    steps:
      - name: Configure Dynamic DNS Resolvers
        run: |
          # Ensure container has active upstream nameservers for dynamic DNS
          printf "nameserver 1.1.1.1\nnameserver 8.8.8.8\n" > /etc/resolv.conf 2>/dev/null || true

      - name: Checkout Code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Set up Java JDK (Temurin ${{ matrix.java }})
        uses: actions/setup-java@v3
        continue-on-error: true
        with:
          java-version: ${{ matrix.java }}
          distribution: 'temurin'

      - name: Ensure Java Available
        run: |
          if ! command -v javac >/dev/null 2>&1; then
            echo "Installing OpenJDK ${{ matrix.java }} via package manager..."
            if command -v apt-get >/dev/null 2>&1; then
              apt-get update && apt-get install -y openjdk-${{ matrix.java }}-jdk-headless || true
            elif command -v apk >/dev/null 2>&1; then
              apk add --no-cache openjdk${{ matrix.java }} || true
            fi
          fi
          echo "Java compiler:"
          javac -version || which javac || true
          echo "Java runtime:"
          java -version || which java || true

      - name: Make scripts executable
        run: |
          chmod +x ./build_all.sh ./test_all.sh ./run.sh

      - name: Build & Run Unit Tests
        run: |
          sh ./test_all.sh

      - name: Prepare Versioned JAR
        run: |
          cp build/j3270.jar "build/j3270-java${{ matrix.java }}.jar"

      - name: Upload j3270 Executable JAR Artifact
        uses: actions/upload-artifact@v3
        continue-on-error: true
        with:
          name: j3270-java${{ matrix.java }}-jar
          path: build/j3270-java${{ matrix.java }}.jar

      - name: Upload Test Reports
        if: always()
        uses: actions/upload-artifact@v3
        continue-on-error: true
        with:
          name: test-reports-java${{ matrix.java }}
          path: build/reports/tests/

      - name: Report Build Status
        if: failure()
        run: |
          echo "### ❌ Build or Test Failed for Java ${{ matrix.java }}" >> $GITHUB_STEP_SUMMARY
          echo "Please check the runner logs above for details." >> $GITHUB_STEP_SUMMARY