name: Release

on:
  push:
    tags: ["v*"]

jobs:
  release:
    runs-on: codeberg-small
    steps:
      - uses: https://data.forgejo.org/actions/checkout@v4

      - uses: https://github.com/ruby/setup-ruby@v1
        with:
          ruby-version: "3.4"
          bundler-cache: true

      - name: Resolve and verify version
        id: version
        env:
          REF: ${{ forgejo.ref }}
        run: |
          set -euo pipefail

          VERSION="${REF##*/}"
          if [[ ! "$VERSION" =~ ^v[0-9]+(\.[0-9]+){0,2}([-+].*)?$ ]]; then
            echo "ERROR: expected a semver tag like v1.2.3, got: '$VERSION' (ref: '$REF')"
            exit 1
          fi

          VERSION_NO_V="${VERSION#v}"
          GEM_VERSION="$(ruby -Ilib -rvolumen/version -e 'print Volumen::VERSION')"
          if [ "$VERSION_NO_V" != "$GEM_VERSION" ]; then
            echo "ERROR: tag ${VERSION} does not match Volumen::VERSION (${GEM_VERSION})"
            exit 1
          fi

          echo "version_no_v=${VERSION_NO_V}" >> "$FORGEJO_OUTPUT"

      - name: Quality gate
        run: |
          set -euo pipefail
          bundle exec rubocop
          bundle exec rake test

      - name: Build gem
        env:
          VERSION_NO_V: ${{ steps.version.outputs.version_no_v }}
        run: |
          set -euo pipefail
          gem build volumen.gemspec --output "volumen-${VERSION_NO_V}.gem"
          ls -lh "volumen-${VERSION_NO_V}.gem"

      - name: Extract CHANGELOG section
        env:
          VERSION_NO_V: ${{ steps.version.outputs.version_no_v }}
        run: |
          set -euo pipefail
          sed -n "/^## \[${VERSION_NO_V}\] /,/^## \[/p" CHANGELOG.md \
            | sed '$d' \
            | tail -n +2 \
            > release-body.md

          if [ ! -s release-body.md ]; then
            echo "ERROR: no CHANGELOG section found for ${VERSION_NO_V}"
            echo "Expected a heading like: ## [${VERSION_NO_V}] — YYYY-MM-DD"
            exit 1
          fi

          echo "Release body preview:"
          head -n 20 release-body.md

      - name: Create release
        id: create
        env:
          FORGEJO_TOKEN: ${{ secrets.FORGEJO_TOKEN }}
        run: |
          set -euo pipefail
          BODY="$(ruby -rjson -e 'print JSON.generate($stdin.read)' < release-body.md)"

          response="$(curl -sS -w '\n%{http_code}' \
            -H "Authorization: token ${FORGEJO_TOKEN}" \
            -H "Content-Type: application/json" \
            -X POST \
            "${FORGEJO_SERVER_URL}/api/v1/repos/${FORGEJO_REPOSITORY}/releases" \
            -d "{
              \"tag_name\": \"${FORGEJO_REF_NAME}\",
              \"name\": \"${FORGEJO_REF_NAME}\",
              \"body\": ${BODY},
              \"draft\": false,
              \"prerelease\": false
            }")"

          http_code="$(echo "$response" | tail -1)"
          payload="$(echo "$response" | sed '$d')"
          echo "HTTP ${http_code}"

          if [ "$http_code" != "201" ]; then
            echo "Failed to create release: ${payload}"
            exit 1
          fi

          RELEASE_ID="$(echo "$payload" | ruby -rjson -e 'print JSON.parse($stdin.read)["id"]')"
          echo "Created release ID=${RELEASE_ID}"
          echo "release_id=${RELEASE_ID}" >> "$FORGEJO_OUTPUT"

      - name: Upload gem asset
        env:
          FORGEJO_TOKEN: ${{ secrets.FORGEJO_TOKEN }}
          VERSION_NO_V: ${{ steps.version.outputs.version_no_v }}
          RELEASE_ID: ${{ steps.create.outputs.release_id }}
        run: |
          set -euo pipefail
          GEM="volumen-${VERSION_NO_V}.gem"

          http_code="$(curl -sS -o /dev/null -w '%{http_code}' \
            -H "Authorization: token ${FORGEJO_TOKEN}" \
            -H "Content-Type: application/octet-stream" \
            -X POST \
            --data-binary "@${GEM}" \
            "${FORGEJO_SERVER_URL}/api/v1/repos/${FORGEJO_REPOSITORY}/releases/${RELEASE_ID}/assets?name=${GEM}")"

          echo "HTTP ${http_code}"
          if [ "$http_code" != "201" ]; then
            echo "Failed to upload ${GEM}"
            exit 1
          fi

          echo "Release ${FORGEJO_REF_NAME} is live with ${GEM}."