name: vociferate/publish
description: >
  Extract release notes from the changelog and create or update a
  Gitea/GitHub release. The repository must be checked out at the release
  tag before this action runs.

inputs:
  token:
    description: >
      Personal access token used to authenticate release API calls.
      Required to support release updates across workflow boundaries.
    required: true
  version:
    description: >
      Semantic version to publish (with or without leading v). When omitted,
      derived from the current git tag ref.
    required: false
    default: ''
  changelog:
    description: Path to changelog file relative to repository root.
    required: false
    default: CHANGELOG.md

outputs:
  release-id:
    description: Numeric ID of the created or updated release.
    value: ${{ steps.create-release.outputs.id }}
  tag:
    description: The tag used for the release (e.g. v1.2.3).
    value: ${{ steps.resolve-version.outputs.tag }}
  version:
    description: The bare version string without leading v (e.g. 1.2.3).
    value: ${{ steps.resolve-version.outputs.version }}

runs:
  using: composite
  steps:
    - name: Resolve release version
      id: resolve-version
      shell: bash
      env:
        INPUT_VERSION: ${{ inputs.version }}
        GITHUB_REF_VALUE: ${{ github.ref }}
      run: |
        set -euo pipefail

        provided="$(printf '%s' "${INPUT_VERSION:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
        if [[ -n "$provided" ]]; then
          normalized="${provided#v}"
          tag="v${normalized}"
        elif [[ "${GITHUB_REF_VALUE}" == refs/tags/* ]]; then
          tag="${GITHUB_REF_VALUE#refs/tags/}"
          normalized="${tag#v}"
        elif head_tag="$(git describe --exact-match --tags HEAD 2>/dev/null)" && [[ -n "$head_tag" ]]; then
          tag="$head_tag"
          normalized="${tag#v}"
        else
          echo "A version input is required when the workflow is not running from a tag push" >&2
          echo "Provide version via input or ensure HEAD is at a tagged commit." >&2
          exit 1
        fi

        echo "tag=$tag"           >> "$GITHUB_OUTPUT"
        echo "version=$normalized" >> "$GITHUB_OUTPUT"

    - name: Extract release notes
      id: extract-notes
      uses: ./run-vociferate
      with:
        root: ${{ github.workspace }}
        changelog: ${{ inputs.changelog }}
        version: ${{ steps.resolve-version.outputs.version }}
        print-release-notes: 'true'

    - name: Write release notes file
      id: write-notes
      shell: bash
      env:
        RELEASE_NOTES: ${{ steps.extract-notes.outputs.stdout }}
        RUNNER_TEMP: ${{ runner.temp }}
      run: |
        set -euo pipefail

        notes_file="${RUNNER_TEMP}/release-notes.md"
        printf '%s\n' "$RELEASE_NOTES" > "$notes_file"

        printf 'notes_file=%s\n' "$notes_file" >> "$GITHUB_OUTPUT"

    - name: Create or update release
      id: create-release
      shell: bash
      env:
        TOKEN: ${{ inputs.token }}
        TAG_NAME: ${{ steps.resolve-version.outputs.tag }}
        RELEASE_NOTES_FILE: ${{ steps.write-notes.outputs.notes_file }}
        GITHUB_API_URL: ${{ github.api_url }}
        GITHUB_SERVER_URL: ${{ github.server_url }}
        GITHUB_REPOSITORY: ${{ github.repository }}
      run: |
        set -euo pipefail

        parse_release_id() {
          local json_file="$1"

          if command -v python3 >/dev/null 2>&1; then
            python3 -c 'import json, sys; payload = json.load(open(sys.argv[1], encoding="utf-8")); value = payload.get("id"); print(value if isinstance(value, int) else "")' "$json_file"
            return
          fi

          # Fallback for environments without python3.
          sed -n 's/.*"id"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' "$json_file" | head -n 1
        }

        raw_token="$(printf '%s' "${TOKEN:-}" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"
        if [[ "$raw_token" =~ ^%\!t\(string=(.*)\)$ ]]; then
          raw_token="${BASH_REMATCH[1]}"
        fi
        api_token="$(printf '%s' "$raw_token" | sed 's/^[[:space:]]\+//; s/[[:space:]]\+$//')"

        if [[ -z "$api_token" ]]; then
          echo "inputs.token is required (set to secrets.RELEASE_PAT)." >&2
          exit 1
        fi

        release_notes="$(cat "$RELEASE_NOTES_FILE")"
        escaped_release_notes="$(printf '%s' "$release_notes" | sed 's/\\/\\\\/g; s/"/\\"/g; :a;N;$!ba;s/\n/\\n/g')"
        release_api="${GITHUB_API_URL:-${GITHUB_SERVER_URL%/}/api/v1}/repos/${GITHUB_REPOSITORY}/releases"
        release_by_tag_api="${release_api}/tags/${TAG_NAME}"

        status_code="$(curl -sS -o release-existing.json -w '%{http_code}' \
          -H "Authorization: token ${api_token}" \
          -H "Content-Type: application/json" \
          "${release_by_tag_api}")"

        if [[ "$status_code" == "200" ]]; then
          existing_release_id="$(parse_release_id release-existing.json)"
          if [[ -z "$existing_release_id" ]]; then
            echo "Failed to parse existing release id for ${TAG_NAME}" >&2
            cat release-existing.json >&2
            exit 1
          fi

          if ! curl --fail-with-body \
            -X PATCH \
            -H "Authorization: token ${api_token}" \
            -H "Content-Type: application/json" \
            "${release_api}/${existing_release_id}" \
            --data "{\"tag_name\":\"${TAG_NAME}\",\"name\":\"${TAG_NAME}\",\"body\":\"${escaped_release_notes}\",\"draft\":false,\"prerelease\":false}" \
            --output release.json; then
            cat release.json >&2 || true
            exit 1
          fi

          echo "id=$existing_release_id" >> "$GITHUB_OUTPUT"
        elif [[ "$status_code" != "404" ]]; then
          echo "Unexpected response while checking release ${TAG_NAME}: HTTP ${status_code}" >&2
          cat release-existing.json >&2
          exit 1
        else
          if ! curl --fail-with-body \
            -X POST \
            -H "Authorization: token ${api_token}" \
            -H "Content-Type: application/json" \
            "${release_api}" \
            --data "{\"tag_name\":\"${TAG_NAME}\",\"name\":\"${TAG_NAME}\",\"body\":\"${escaped_release_notes}\",\"draft\":false,\"prerelease\":false}" \
            --output release.json; then
            cat release.json >&2 || true
            exit 1
          fi

          release_id="$(parse_release_id release.json)"
          if [[ -z "$release_id" ]]; then
            echo "Failed to parse release id from API response" >&2
            cat release.json >&2
            exit 1
          fi

          echo "id=$release_id" >> "$GITHUB_OUTPUT"
        fi