name: Release APK
run-name: Release APK ${{ inputs.version }}

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Release tag to create, e.g. v1.0.0'
        required: true
        type: string

concurrency: release-apk

permissions: {}

jobs:
  apk:
    runs-on: ubuntu-latest
    timeout-minutes: 30
    permissions:
      contents: write # create the tag + release
      id-token: write # sign the build attestation
      attestations: write
    env:
      TAG: ${{ inputs.version }}
    steps:
      - name: Validate version
        run: |
          [[ "$TAG" =~ ^v([0-9]+)\.([0-9]+)\.([0-9]+)$ ]] || { echo "::error::version must look like v1.0.0"; exit 1; }
          MA=${BASH_REMATCH[1]} MI=${BASH_REMATCH[2]} PA=${BASH_REMATCH[3]}
          (( MI < 100 && PA < 100 )) || { echo "::error::minor and patch must be < 100"; exit 1; }
          echo "VERSION=${TAG#v}" >> $GITHUB_ENV
          echo "CODE=$((MA*10000 + MI*100 + PA))" >> $GITHUB_ENV
          echo "APK=sune-$TAG.apk" >> $GITHUB_ENV
          echo "BT=$RUNNER_TEMP/sdk/build-tools/36.1.0" >> $GITHUB_ENV

      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Fail if the release already exists
        if: github.ref == 'refs/heads/master'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          if gh release view "$TAG" --repo "$GITHUB_REPOSITORY" >/dev/null 2>&1; then
            echo "::error::$TAG already exists"; exit 1
          fi

      - uses: actions/setup-java@de7274f081f381c8f8158605e0321c36c376e2e6 # v6.0.1
        with:
          distribution: temurin
          java-version: 17

      - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
        with:
          node-version: 22

      - name: Install Android SDK + Bubblewrap
        run: |
          SDK=$RUNNER_TEMP/sdk
          mkdir -p "$SDK/bin" # bubblewrap only checks that this exists
          SM=$ANDROID_HOME/cmdline-tools/latest/bin/sdkmanager
          yes | "$SM" --sdk_root="$SDK" --licenses >/dev/null || true # yes exits on SIGPIPE
          "$SM" --sdk_root="$SDK" "build-tools;36.1.0" "platforms;android-36" >/dev/null
          echo "ANDROID_HOME=$SDK" >> $GITHUB_ENV # the runner's own ANDROID_SDK_ROOT would conflict
          echo "ANDROID_SDK_ROOT=$SDK" >> $GITHUB_ENV
          npm install --global --ignore-scripts @bubblewrap/cli@1.25.0
          mkdir -p ~/.bubblewrap
          jq -n --arg jdk "$JAVA_HOME" --arg sdk "$SDK" '{jdkPath:$jdk,androidSdkPath:$sdk}' > ~/.bubblewrap/config.json

      - name: Build + sign
        env:
          ANDROID_KEYSTORE_B64: ${{ secrets.ANDROID_KEYSTORE_B64 }}
          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
          BUBBLEWRAP_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASS }}
          BUBBLEWRAP_KEY_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASS }}
        run: |
          B=$RUNNER_TEMP/build OUT=$RUNNER_TEMP/out
          mkdir -p "$B" "$OUT"
          echo "$ANDROID_KEYSTORE_B64" | base64 -d > "$B/sune.jks"
          # pin the icon to this exact commit instead of whatever the site serves today
          ICON="https://raw.githubusercontent.com/$GITHUB_REPOSITORY/$GITHUB_SHA/public/appstore_content/%E2%9C%BA.png"
          jq --arg v "$VERSION" --argjson c "$CODE" --arg a "$ANDROID_KEY_ALIAS" --arg i "$ICON" \
            '.appVersion=$v | .appVersionCode=$c | .signingKey.alias=$a | .iconUrl=$i | .maskableIconUrl=$i' \
            android/twa-manifest.json > "$B/twa-manifest.json"
          cd "$B"
          bubblewrap update --manifest ./twa-manifest.json --skipVersionUpgrade
          bubblewrap build --manifest ./twa-manifest.json --skipPwaValidation
          mv app-release-signed.apk "$OUT/$APK"
          rm -f sune.jks
          echo "OUT=$OUT" >> $GITHUB_ENV

      - name: Verify the APK
        run: |
          cd "$OUT"
          "$BT/apksigner" verify --verbose --print-certs "$APK" | tee verify.txt
          grep -q "Number of signers: 1" verify.txt
          GOT=$(sed -n 's/.*certificate SHA-256 digest: //p' verify.txt | sed -n 1p)
          WANT=$(jq -r '.[].target | select(.package_name=="chat.sune.app") | .sha256_cert_fingerprints[]' "$GITHUB_WORKSPACE/public/.well-known/assetlinks.json" | tr -d ':' | tr A-F a-f)
          [ "$GOT" = "$WANT" ] || { echo "::error::signing cert $GOT does not match assetlinks.json ($WANT)"; exit 1; }
          "$BT/aapt2" dump badging "$APK" > full-badging.txt
          grep -m1 '^package:' full-badging.txt | tee badging.txt
          grep -q "name='chat.sune.app' versionCode='$CODE' versionName='$VERSION'" badging.txt
          sha256sum "$APK" | tee "$APK.sha256"
          echo "SIGNER=$GOT" >> $GITHUB_ENV

      - name: Attest build provenance
        if: github.ref == 'refs/heads/master'
        uses: actions/attest-build-provenance@4d101475d8b20a2381f78447822ac1eab6504dd8 # v4.2.2
        with:
          subject-path: ${{ runner.temp }}/out/sune-${{ inputs.version }}.apk

      - name: Publish release
        if: github.ref == 'refs/heads/master'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          cd "$OUT"
          SHA=$(cut -d' ' -f1 "$APK.sha256")
          cat > notes.md <<EOF
          Built and signed by GitHub Actions from commit \`$GITHUB_SHA\` ([workflow run]($GITHUB_SERVER_URL/$GITHUB_REPOSITORY/actions/runs/$GITHUB_RUN_ID)). Nobody handled the file in between.

          Verify a download:
          \`\`\`
          gh attestation verify $APK --repo $GITHUB_REPOSITORY
          \`\`\`

          - Package: \`chat.sune.app\`
          - SHA-256: \`$SHA\`
          - Signing certificate SHA-256: \`$SIGNER\`
          EOF
          gh release create "$TAG" "$APK" "$APK.sha256" --repo "$GITHUB_REPOSITORY" --target "$GITHUB_SHA" --title "Sune $TAG" --notes-file notes.md

      - name: Keep the APK as a workflow artifact (non-release runs)
        if: github.ref != 'refs/heads/master'
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: ${{ env.APK }}
          path: ${{ runner.temp }}/out/*.apk
          retention-days: 3