name: Doxygen → Codeberg Pages

# Auto-publish Doxygen HTML to https://tmoussa.codeberg.page/ConformalLabpp/
# every time the public API or docs source changes on main.
#
# Pattern: mirrors mirror-to-codeberg.yml — reuses the existing
# CODEBERG_TOKEN secret + HTTPS push.  No new secret setup required.
#
# Trigger: push to main that touches code/include/**, Doxyfile, the
# filter script, doc/**/*.md, README.md, or this workflow file.  Also
# manually triggerable via workflow_dispatch.

on:
  push:
    branches:
      - main
    paths:
      - "code/include/**"
      - "Doxyfile"
      - "scripts/doxygen-md-filter.sh"
      - "doc/**/*.md"
      - "README.md"
      - "CLAUDE.md"
      - ".gitea/workflows/doxygen-pages.yml"
  workflow_dispatch: {}

jobs:
  publish:
    runs-on: eulernest
    container:
      image: git.eulernest.eu/conformallab/ci-cpp:latest

    steps:
      - uses: actions/checkout@v4

      - name: Configure CMake (Doxygen target only — no compiler needed)
        run: cmake -S code -B build

      - name: Build Doxygen HTML
        run: |
          cmake --build build --target doc
          test -f doc/doxygen/html/index.html
          warnings=$(wc -l < doc/doxygen/doxygen-warnings.log)
          echo "DOC ▸ Doxygen warnings: $warnings"
          if [ "$warnings" -gt 0 ]; then
            echo "::warning::Doxygen produced $warnings warning(s) — review doc/doxygen/doxygen-warnings.log"
            head -30 doc/doxygen/doxygen-warnings.log
          fi

      - name: Report Doxygen coverage
        run: bash scripts/doxygen-coverage.sh

      - name: Regenerate doc/api/headers.md from XML
        run: |
          python3 scripts/gen-headers-md.py
          # If the auto-generated headers.md drifted from main, note it.
          # This job runs on every main push so a drift only persists
          # for the duration of one push — the next push that lands
          # will fold the new headers.md back into main (via the
          # codeberg pages branch).  For deterministic regeneration
          # within main itself, run `bash scripts/regen-docs.sh`
          # locally before pushing.
          if ! git diff --quiet -- doc/api/headers.md; then
            echo "::warning::doc/api/headers.md drifted — run scripts/regen-docs.sh locally and commit before next push"
            git --no-pager diff -- doc/api/headers.md | head -30
          fi

      - name: Publish HTML to codeberg pages branch
        env:
          CODEBERG_TOKEN: ${{ secrets.CODEBERG_TOKEN }}
        run: |
          set -eu
          # Build the publish payload in a clean scratch dir so the
          # orphan branch contains only the Doxygen output (and a
          # marker README), never any build/source artefacts.
          publish_dir=$(mktemp -d)
          cp -r doc/doxygen/html/. "$publish_dir/"

          cat > "$publish_dir/README.txt" <<EOF
          conformallab++ — Doxygen HTML API documentation.
          Auto-generated by .gitea/workflows/doxygen-pages.yml from
          commit ${GITHUB_SHA:-$(git rev-parse HEAD)} on $(date -Iseconds).
          Source: https://codeberg.org/TMoussa/ConformalLabpp
          EOF

          cd "$publish_dir"
          git init -q -b pages
          git config user.email "ci@eulernest"
          git config user.name  "conformallab CI"
          git add -A
          git commit -q -m "Auto-publish: Doxygen HTML for ${GITHUB_SHA:-HEAD}"
          # Force-push: the pages branch is a publish target, history
          # is not interesting (we only ever serve the latest snapshot).
          git push -f \
            "https://TMoussa:${CODEBERG_TOKEN}@codeberg.org/TMoussa/ConformalLabpp.git" \
            pages:pages