name: Publish APT repo to S3/CloudFront

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      tag:
        description: "Tag to publish (e.g. v1.9.0). Leave empty to use latest release."
        required: false
        type: string
      backfill_all:
        description: "Build/publish repo for ALL releases (can take a while)."
        required: false
        default: false
        type: boolean

permissions:
  id-token: write
  contents: read

jobs:
  publish-apt:
    runs-on: ubuntu-latest

    env:
      PKG_NAME: newt
      SUITE: stable
      COMPONENT: main
      REPO_BASE_URL: "https://repo.dev.fosrl.io/apt"

    steps:
      - name: Configure AWS credentials (OIDC)
        uses: aws-actions/configure-aws-credentials@v4
        with:
          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
          aws-region: ${{ vars.AWS_REGION }}

      - name: Install tooling
        run: |
          set -euo pipefail
          sudo apt-get update
          sudo apt-get install -y dpkg-dev apt-utils gnupg curl jq gh

          # nfpm
          curl -fsSL https://github.com/goreleaser/nfpm/releases/latest/download/nfpm_Linux_x86_64.tar.gz \
            | sudo tar -xz -C /usr/local/bin nfpm

      - name: Determine tags to process
        id: tags
        env:
          GH_TOKEN: ${{ github.token }}
          REPO: ${{ github.repository }}
          EVENT_TAG: ${{ github.event.release.tag_name }}
          INPUT_TAG: ${{ inputs.tag }}
          BACKFILL: ${{ inputs.backfill_all }}
        run: |
          set -euo pipefail

          if [ "${BACKFILL}" = "true" ]; then
            echo "Backfill mode: collecting all release tags..."
            TAGS="$(gh release list -R "${REPO}" --limit 200 --json tagName --jq '.[].tagName')"
          else
            if [ -n "${INPUT_TAG}" ]; then
              TAGS="${INPUT_TAG}"
            elif [ -n "${EVENT_TAG}" ]; then
              TAGS="${EVENT_TAG}"
            else
              echo "No tag provided; using latest release tag..."
              TAGS="$(gh release view -R "${REPO}" --json tagName --jq '.tagName')"
            fi
          fi

          # Multi-line output for next steps
          {
            echo "tags<<EOF"
            echo "${TAGS}"
            echo "EOF"
          } >> "${GITHUB_OUTPUT}"

      - name: Import GPG key (APT signing)
        env:
          APT_GPG_PRIVATE_KEY: ${{ secrets.APT_GPG_PRIVATE_KEY }}
        run: |
          set -euo pipefail
          echo "${APT_GPG_PRIVATE_KEY}" | gpg --batch --import
          gpg --list-secret-keys --keyid-format=long

      - name: Pull existing repo from S3 (incremental)
        run: |
          set -euo pipefail
          mkdir -p repo/apt
          BUCKET="${{ vars.S3_BUCKET }}"
          PREFIX="${{ vars.S3_PREFIX }}"
          aws s3 sync "s3://${BUCKET}/${PREFIX}apt/" repo/apt/ || true

            - name: Build packages and update repo (for selected tags)
        env:
          GH_TOKEN: ${{ github.token }}
          REPO: ${{ github.repository }}
          TAGS: ${{ steps.tags.outputs.tags }}
          APT_GPG_PASSPHRASE: ${{ secrets.APT_GPG_PASSPHRASE }}
        run: |
          set -euo pipefail

          KEYID="$(gpg --list-secret-keys --with-colons | awk -F: '$1=="sec"{print $5; exit}')"
          test -n "${KEYID}"

          mkdir -p assets build

          printf '%s\n' "${TAGS}" | while IFS= read -r TAG; do
            [ -z "${TAG}" ] && continue
            echo "=== Processing tag: ${TAG} ==="

            rm -rf assets build
            mkdir -p assets build

            gh release download "${TAG}" -R "${REPO}" -p "newt_linux_amd64" -D assets
            gh release download "${TAG}" -R "${REPO}" -p "newt_linux_arm64" -D assets

            VERSION="${TAG#v}"

            for arch in amd64 arm64; do
              bin="assets/newt_linux_${arch}"
              test -f "${bin}"
              install -Dm755 "${bin}" "build/newt"

              python3 - <<PY
import yaml
cfg = {
  "name": "newt",
  "arch": "${arch}",
  "platform": "linux",
  "version": "${VERSION}",
  "section": "net",
  "priority": "optional",
  "maintainer": "fosrl",
  "description": "Newt - userspace tunnel client and TCP/UDP proxy",
  "contents": [
    {"src": "build/newt", "dst": "/usr/bin/newt"}
  ]
}
print(yaml.safe_dump(cfg, sort_keys=False))
PY > nfpm.yaml

              nfpm package -p deb -f nfpm.yaml -t "build/newt_${VERSION}_${arch}.deb"
            done

            mkdir -p "repo/apt/pool/main/n/newt/"
            cp -v build/*.deb "repo/apt/pool/main/n/newt/"
          done

          cat > apt-ftparchive.conf <<EOF
APT::FTPArchive::Release::Origin "fosrl";
APT::FTPArchive::Release::Label "newt";
APT::FTPArchive::Release::Suite "${SUITE}";
APT::FTPArchive::Release::Codename "${SUITE}";
APT::FTPArchive::Release::Architectures "amd64 arm64";
APT::FTPArchive::Release::Components "${COMPONENT}";
APT::FTPArchive::Release::Description "Newt APT repository";
EOF

          apt-ftparchive -c apt-ftparchive.conf release "dists/${SUITE}" > "dists/${SUITE}/Release"

          cd "dists/${SUITE}"

          gpg --batch --yes --pinentry-mode loopback \
              ${APT_GPG_PASSPHRASE:+--passphrase "${APT_GPG_PASSPHRASE}"} \
              --local-user "${KEYID}" \
              --clearsign -o InRelease Release

          gpg --batch --yes --pinentry-mode loopback \
              ${APT_GPG_PASSPHRASE:+--passphrase "${APT_GPG_PASSPHRASE}"} \
              --local-user "${KEYID}" \
              -abs -o Release.gpg Release

          cd ../../..
          gpg --batch --yes --armor --export "${KEYID}" > public.key

      - name: Upload repo to S3
        run: |
          set -euo pipefail
          BUCKET="${{ vars.S3_BUCKET }}"
          PREFIX="${{ vars.S3_PREFIX }}"
          aws s3 sync repo/apt "s3://${BUCKET}/${PREFIX}apt/" --delete

      - name: CloudFront invalidation (metadata only)
        run: |
          set -euo pipefail
          aws cloudfront create-invalidation \
            --distribution-id "${{ vars.CLOUDFRONT_DISTRIBUTION_ID }}" \
            --paths "/${{ vars.S3_PREFIX }}apt/dists/*" "/${{ vars.S3_PREFIX }}apt/public.key"