name: Release

# Cut a plugin release from the Actions UI: "Run workflow" → enter the
# version (e.g. 0.5.1). This repo is the Vim/Neovim plugin only and ships no
# binary (the nuwiki-ls server lives in nuwiki-rs and is downloaded at install
# time), so a release is just: stamp g:nuwiki_version, commit, tag vX.Y.Z, and
# publish a Gitea release entry. No build / cross-compile.
#
# Dispatch-only on purpose: the job creates the tag itself, so a push-tag
# trigger would double-fire.
on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Release version, no leading v (e.g. 0.5.1)'
        required: true
        type: string

permissions:
  contents: write

jobs:
  release:
    name: tag + release ${{ inputs.version }}
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          # Push the release commit + tag back with a write-capable token.
          token: ${{ secrets.RELEASE_TOKEN }}

      - name: Validate version + stamp
        id: stamp
        env:
          VERSION: ${{ inputs.version }}
        run: |
          set -euo pipefail
          ver="${VERSION#v}" # tolerate a leading v
          if ! printf '%s' "$ver" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+([-.][0-9A-Za-z.-]+)?$'; then
            echo "::error::'$ver' is not a semver version (expected e.g. 0.5.1)"
            exit 1
          fi
          tag="v$ver"
          if git rev-parse -q --verify "refs/tags/$tag" >/dev/null \
            || git ls-remote --exit-code --tags origin "$tag" >/dev/null 2>&1; then
            echo "::error::tag $tag already exists"
            exit 1
          fi
          # g:nuwiki_version in plugin/nuwiki.vim is the plugin's only version
          # location (surfaced by :NuwikiShowVersion / health).
          sed -i -E "s/(let g:nuwiki_version = ')[^']*(')/\1$ver\2/" plugin/nuwiki.vim
          if ! grep -q "let g:nuwiki_version = '$ver'" plugin/nuwiki.vim; then
            echo "::error::failed to stamp g:nuwiki_version in plugin/nuwiki.vim"
            exit 1
          fi
          echo "version=$ver" >> "$GITHUB_OUTPUT"
          echo "tag=$tag" >> "$GITHUB_OUTPUT"

      - name: Sanity-check the plugin sources cleanly
        run: |
          set -euo pipefail
          sudo apt-get update -qq
          sudo apt-get install -y --no-install-recommends vim
          # plugin/nuwiki.vim must source without error (silent Ex mode exits
          # non-zero on any error), and expose the stamped version.
          vim -e -s -u NONE -N \
            -c 'set runtimepath+=.' \
            -c 'runtime plugin/nuwiki.vim' \
            -c "if get(g:, 'nuwiki_version', '') !=# '${{ steps.stamp.outputs.version }}' | cquit 1 | endif" \
            -c 'qall!'

      - name: Commit, tag, push
        env:
          VER: ${{ steps.stamp.outputs.version }}
          TAG: ${{ steps.stamp.outputs.tag }}
        run: |
          set -euo pipefail
          git config user.name  "gitea-actions"
          git config user.email "gitea-actions@users.noreply.code.gfran.co"
          git add plugin/nuwiki.vim
          git commit -m "chore(release): $VER"
          git tag -a "$TAG" -m "nuwiki plugin $VER"
          git push origin "HEAD:${GITHUB_REF_NAME}"
          git push origin "$TAG"

      - name: Ensure jq + curl
        run: |
          command -v jq >/dev/null 2>&1 || { apt-get update && apt-get install -y --no-install-recommends jq; }
          command -v curl >/dev/null 2>&1 || { apt-get update && apt-get install -y --no-install-recommends curl; }

      - name: Generate release notes
        id: notes
        env:
          TAG: ${{ steps.stamp.outputs.tag }}
        run: |
          set -euo pipefail
          git fetch --tags --force origin >/dev/null 2>&1 || true
          # Previous tag = newest tag that isn't the one we just cut.
          prev_tag=$(git tag --sort=-version:refname | grep -vxF "$TAG" | head -n1 || echo "")
          if [ -n "$prev_tag" ]; then
            log=$(git log --oneline "$prev_tag..$TAG")
            compare="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/compare/${prev_tag}...${TAG}"
          else
            log=$(git log --oneline "$TAG")
            compare="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/commits/tag/${TAG}"
          fi
          cat > release-notes.md <<EOF
          Vim/Neovim plugin release. The \`nuwiki-ls\` server binary is downloaded
          automatically from [nuwiki-rs](${GITHUB_SERVER_URL}/gffranco/nuwiki-rs)
          at install time — no binary assets are attached here by design.

          **Full Changelog**: ${compare}

          **Changes**:
          ${log}
          EOF
          echo "wrote release notes"

      - name: Create Gitea release
        env:
          RELEASE_TOKEN: ${{ secrets.RELEASE_TOKEN }}
          GITEA_SERVER: ${{ github.server_url }}
          REPO: ${{ github.repository }}
          TAG: ${{ steps.stamp.outputs.tag }}
        run: |
          set -euo pipefail
          if [ -z "${RELEASE_TOKEN:-}" ]; then
            echo "::error::RELEASE_TOKEN secret is not set"
            exit 1
          fi
          # Idempotent: skip if a release for this tag already exists.
          existing=$(curl --silent -o /dev/null -w "%{http_code}" \
            -H "Authorization: token $RELEASE_TOKEN" \
            "$GITEA_SERVER/api/v1/repos/$REPO/releases/tags/$TAG" || true)
          if [ "$existing" = "200" ]; then
            echo "release $TAG already exists — nothing to do"
            exit 0
          fi
          notes=$(cat release-notes.md 2>/dev/null || echo "")
          payload=$(jq -n --arg tag "$TAG" --arg name "$TAG" --arg body "$notes" \
            '{tag_name: $tag, name: $name, body: $body, draft: false, prerelease: false}')
          code=$(curl --silent -o /tmp/rel.json -w "%{http_code}" \
            -H "Authorization: token $RELEASE_TOKEN" \
            -H "Content-Type: application/json" \
            -d "$payload" \
            "$GITEA_SERVER/api/v1/repos/$REPO/releases")
          if [ "$code" != "201" ]; then
            echo "::error::failed to create release (HTTP $code)"; cat /tmp/rel.json; exit 1
          fi
          echo "created release $TAG"