name: Build Limbo and Add-ons

on:
  push:
    branches:
      - main
    paths-ignore:
      - '**/README.md'
      - '**/readme.md'
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash

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

      - name: Set up default JDK (21 fallback)
        id: java
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 21

      - name: Install `javap` dependencies
        run: sudo apt-get update && sudo apt-get install -y openjdk-21-jdk

      - name: Function to detect class version
        id: detect-java
        run: |
          find_external_class_version() {
            class_file=$(find "$1" -name "*.class" | head -n 1)
            if [[ -f "$class_file" ]]; then
              version=$(javap -verbose "$class_file" | grep "major version" | awk '{print $3}')
              echo "Detected major version: $version"

              # Map to Java version
              if [[ "$version" == "61" ]]; then
                echo "Detected Java 17"
                echo "java_version=17" >> "$GITHUB_OUTPUT"
              elif [[ "$version" == "65" ]]; then
                echo "Detected Java 21"
                echo "java_version=21" >> "$GITHUB_OUTPUT"
              else
                echo "Unknown version. Falling back to 21"
                echo "java_version=21" >> "$GITHUB_OUTPUT"
              fi
            else
              echo "No .class file found, defaulting to JDK 21"
              echo "java_version=21" >> "$GITHUB_OUTPUT"
            fi
          }

          # Clone and check ViaLimbo first
          git clone https://github.com/LOOHP/ViaLimbo.git external/ViaLimbo
          mvn -f external/ViaLimbo/pom.xml dependency:resolve || true

          # Try detecting version
          find_external_class_version "external/ViaLimbo"
        continue-on-error: true

      - name: Set up detected JDK
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: ${{ steps.detect-java.outputs.java_version }}

      - name: Build ViaLimbo (optional)
        run: |
          cd external/ViaLimbo
          mvn package -DskipTests || echo "::warning::ViaLimbo build failed"
        continue-on-error: true

      - name: Build FloodgateLimbo (optional)
        run: |
          git clone https://github.com/LOOHP/floodgate-limbo.git external/FloodgateLimbo
          cd external/FloodgateLimbo
          mvn package -DskipTests || echo "::warning::FloodgateLimbo build failed"
        continue-on-error: true

      - name: Set up Java for main project (from pom.xml or fallback)
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: 21

      - name: Build your main project
        run: mvn package -DskipTests || echo "::warning::Main project build failed"
        continue-on-error: true

      - name: Create GitHub Release
        if: startsWith(github.ref, 'refs/tags/')
        uses: softprops/action-gh-release@v2
        with:
          files: |
            target/*.jar
            external/ViaLimbo/target/*.jar
            external/FloodgateLimbo/target/*.jar