name: Build and Release APK

# Build an APK and publish it as a GitHub Release whenever commits land on main
# (for example when a pull request is merged). Can also be run manually.
on:
  push:
    branches: [ main ]
  workflow_dispatch:

# Allow the built-in token to create releases and upload the APK.
permissions:
  contents: write

# Don't let two pushes to main race on the same release.
concurrency:
  group: release-${{ github.ref }}
  cancel-in-progress: false

jobs:
  build:
    name: Build APK and publish release
    # workflow_dispatch can be aimed at any branch from the Actions UI. Releases
    # are what the in-app updater installs, so only main may produce one —
    # anything else is a no-op rather than shipping unreviewed code to everyone.
    if: github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    env:
      # Tells the build this is a real release, so the APK is stamped with the
      # run number that matches the tag below. Absent everywhere else, which
      # keeps dev and local builds at 1.0.0-dev.
      PLG_RELEASE: "1"
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up JDK 17
        uses: actions/setup-java@v4
        with:
          distribution: temurin
          java-version: '17'
          cache: gradle

      - name: Set up Android SDK
        uses: android-actions/setup-android@v3

      - name: Build debug APK
        run: ./gradlew assembleDebug --no-daemon --stacktrace

      - name: Stage APK for release
        id: stage
        run: |
          set -euo pipefail
          version="v1.0.${{ github.run_number }}"
          src="app/build/outputs/apk/debug/app-debug.apk"
          dest="ProLibertateGames-${version}.apk"
          cp "$src" "$dest"
          echo "version=$version" >> "$GITHUB_OUTPUT"
          echo "apk=$dest" >> "$GITHUB_OUTPUT"

      - name: Upload APK as workflow artifact
        uses: actions/upload-artifact@v4
        with:
          name: ProLibertateGames-apk
          path: ${{ steps.stage.outputs.apk }}
          if-no-files-found: error

      - name: Create GitHub release
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail
          gh release create "${{ steps.stage.outputs.version }}" \
            "${{ steps.stage.outputs.apk }}" \
            --repo "${{ github.repository }}" \
            --target "${{ github.sha }}" \
            --title "ProLibertateGames ${{ steps.stage.outputs.version }}" \
            --notes "Automated release built from \`${{ github.sha }}\` on push to \`main\`.

          Download **${{ steps.stage.outputs.apk }}** below and install it on an Android device (you may need to allow *Install unknown apps*). This is a debug-signed build."