name: Build & Release APK

on:
  push:
    tags:
      - 'v*'

permissions:
  contents: write

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

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

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v4

      # services.gradle.org intermittently returns 504s / times out while the
      # wrapper fetches the distribution. Retry just the download (./gradlew
      # --version does nothing else) with backoff so a flaky CDN doesn't fail
      # the release. Once fetched it's cached for the real build step.
      - name: Warm Gradle wrapper (tolerate flaky CDN)
        run: |
          for i in 1 2 3 4 5; do
            ./gradlew --version && exit 0
            echo "Gradle download attempt $i failed; retrying in $((i*20))s..."
            sleep $((i*20))
          done
          echo "Gradle distribution still unreachable after retries." >&2
          exit 1

      - name: Decode keystore
        run: |
          mkdir -p keystore
          echo "${{ secrets.KEYSTORE_BASE64 }}" | base64 -d > keystore/ledga-release.jks

      - name: Build release APK
        env:
          KEYSTORE_PASSWORD: ${{ secrets.KEYSTORE_PASSWORD }}
          KEY_ALIAS: ${{ secrets.KEY_ALIAS }}
          KEY_PASSWORD: ${{ secrets.KEY_PASSWORD }}
        run: ./gradlew assembleRelease

      - name: Rename APK
        run: |
          VERSION=${GITHUB_REF_NAME#v}
          mv app/build/outputs/apk/release/app-release.apk app/build/outputs/apk/release/ledga-v${VERSION}.apk

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          files: app/build/outputs/apk/release/ledga-*.apk
          generate_release_notes: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

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

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v4

      - name: Warm Gradle wrapper (tolerate flaky CDN)
        run: |
          for i in 1 2 3 4 5; do
            ./gradlew --version && exit 0
            echo "Gradle download attempt $i failed; retrying in $((i*20))s..."
            sleep $((i*20))
          done
          echo "Gradle distribution still unreachable after retries." >&2
          exit 1

      - name: Run tests
        run: ./gradlew testDebugUnitTest