name: Release (Stable)

on:
  push:
    tags:
      # Stable package tags: <pkg>@<semver>
      # e.g. markstream-vue@0.0.4, markstream-react@0.0.3-beta.2
      - '*@[0-9]*'

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Parse tag
        id: meta
        shell: bash
        run: |
          set -euo pipefail
          TAG="${GITHUB_REF_NAME}"
          PKG="${TAG%@*}"
          VERSION="${TAG##*@}"

          if [[ -z "${PKG}" || -z "${VERSION}" ]]; then
            echo "Invalid tag: ${TAG}"
            exit 1
          fi

          PRERELEASE=false
          if [[ "${VERSION}" == *-* ]]; then
            PRERELEASE=true
          fi

          echo "pkg=${PKG}" >> "${GITHUB_OUTPUT}"
          echo "version=${VERSION}" >> "${GITHUB_OUTPUT}"
          echo "prerelease=${PRERELEASE}" >> "${GITHUB_OUTPUT}"
          echo "name=[${PKG}] ${VERSION}" >> "${GITHUB_OUTPUT}"

      - name: Checkout (for changelog body)
        if: ${{ steps.meta.outputs.pkg == 'markstream-vue' }}
        uses: actions/checkout@v4
        with:
          fetch-depth: 1

      - name: Build changelog body
        id: changelog
        if: ${{ steps.meta.outputs.pkg == 'markstream-vue' }}
        shell: bash
        run: |
          set -euo pipefail
          VERSION="${{ steps.meta.outputs.version }}"
          BODY_FILE="$(mktemp)"

          awk -v version="${VERSION}" '
            BEGIN { capture = 0; found = 0 }
            /^## \[/ {
              if (capture == 1)
                exit
              if ($0 ~ "^## \\[" version "\\]") {
                capture = 1
                found = 1
                next
              }
            }
            capture == 1 { print }
            END {
              if (found == 0)
                exit 2
            }
          ' CHANGELOG.md > "${BODY_FILE}" || {
            echo "Unable to find CHANGELOG.md section for version ${VERSION}" >&2
            exit 1
          }

          if [[ ! -s "${BODY_FILE}" ]]; then
            echo "Found empty CHANGELOG.md section for version ${VERSION}" >&2
            exit 1
          fi

          echo "body_path=${BODY_FILE}" >> "${GITHUB_OUTPUT}"

      - name: Create GitHub Release (markstream-vue)
        if: ${{ steps.meta.outputs.pkg == 'markstream-vue' }}
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ github.ref_name }}
          name: ${{ steps.meta.outputs.name }}
          prerelease: ${{ steps.meta.outputs.prerelease }}
          generate_release_notes: true
          body_path: ${{ steps.changelog.outputs.body_path }}
          append_body: true

      - name: Create GitHub Release (other packages)
        if: ${{ steps.meta.outputs.pkg != 'markstream-vue' }}
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ github.ref_name }}
          name: ${{ steps.meta.outputs.name }}
          prerelease: ${{ steps.meta.outputs.prerelease }}
          generate_release_notes: true