name: C++ Tests

on:
  push:
    branches:
      - main
      - dev
      - "claude/**"
      - "feature/**"
  pull_request:

# ─────────────────────────────────────────────────────────────────────────────
# Job 1 — test-fast
#   Pure-math tests (Clausen, ImLi₂, Hyper-ideal geometry).
#   No CGAL, no Boost. Eigen + GTest only. Runs on ALL branches.
# ─────────────────────────────────────────────────────────────────────────────
jobs:
  test-fast:
    runs-on: eulernest
    container:
      image: git.eulernest.eu/conformallab/ci-cpp:latest

    steps:
      - uses: actions/checkout@v4

      - name: Configure (tests-only)
        run: cmake -S code -B build -DCMAKE_BUILD_TYPE=Release

      - name: Build
        run: nice -n 19 cmake --build build --target conformallab_tests -j$(nproc)

      - name: Run tests
        run: >
          ctest --test-dir build
          --output-on-failure
          --output-junit test-results.xml

      - name: Summary
        if: always()
        run: |
          if [ -f test-results.xml ]; then
            total=$(grep -o 'tests="[0-9]*"'     test-results.xml | grep -o '[0-9]*' | head -1)
            failed=$(grep -o 'failures="[0-9]*"' test-results.xml | grep -o '[0-9]*' | head -1)
            skipped=$(grep -o 'skipped="[0-9]*"' test-results.xml | grep -o '[0-9]*' | head -1)
            passed=$(( ${total:-0} - ${failed:-0} - ${skipped:-0} ))
            echo "FAST  ▸ TOTAL ${total:-0} | PASSED $passed | FAILED ${failed:-0} | SKIPPED ${skipped:-0}"
          fi

# ─────────────────────────────────────────────────────────────────────────────
# Job 2 — test-cgal
#   Full CGAL test suite (Phase 3–7, 158 tests).
#   Runs ONLY on pull requests (not on direct pushes to dev/main).
#   Starts only after test-fast succeeds.
#
#   Uses -DWITH_CGAL_TESTS=ON (not -DWITH_CGAL=ON) to avoid building
#   Viewer/GLFW — the CI container has no wayland-scanner.
#
#   Boost (libboost-dev) is already present in the container since the image rebuild.
# ─────────────────────────────────────────────────────────────────────────────
  test-cgal:
    needs: test-fast
    if: github.event_name == 'pull_request'
    runs-on: eulernest
    container:
      image: git.eulernest.eu/conformallab/ci-cpp:latest
      # Memory bumped from 1400m → 1600m to avoid OOM during CGAL header
      # compilation on ARM64 (CGAL + Eigen templates allocate ~700 MB per
      # cc1plus instance; -j1 leaves a small margin).
      # memory-swap == memory disables swap entirely so OOM fails fast
      # rather than thrashing on the SD card.
      options: "--memory=1600m --memory-swap=1600m"

    steps:
      - uses: actions/checkout@v4

      - name: Configure (WITH_CGAL_TESTS — no viewer, no wayland-scanner)
        run: cmake -S code -B build -DWITH_CGAL_TESTS=ON -DCMAKE_BUILD_TYPE=Release

      - name: Build CGAL-Tests
        run: nice -n 19 cmake --build build --target conformallab_cgal_tests -j1

      - name: Run CGAL-Tests
        run: >
          ctest --test-dir build
          -R "^cgal\."
          --output-on-failure
          --output-junit cgal-results.xml

      - name: Summary
        if: always()
        run: |
          if [ -f cgal-results.xml ]; then
            total=$(grep -o 'tests="[0-9]*"'     cgal-results.xml | grep -o '[0-9]*' | head -1)
            failed=$(grep -o 'failures="[0-9]*"' cgal-results.xml | grep -o '[0-9]*' | head -1)
            skipped=$(grep -o 'skipped="[0-9]*"' cgal-results.xml | grep -o '[0-9]*' | head -1)
            passed=$(( ${total:-0} - ${failed:-0} - ${skipped:-0} ))
            echo "CGAL  ▸ TOTAL ${total:-0} | PASSED $passed | FAILED ${failed:-0} | SKIPPED ${skipped:-0}"
          fi

      # ── Structural gate: doc/api/tests.md totals match ctest reality ───
      # Single source of truth for test counts (see doc/release-policy.md).
      # Reuses the already-built ./build dir via BUILD_DIR env var, so this
      # adds ~5 s on top of the existing CGAL job.
      - name: Verify test-count consistency (doc/api/tests.md)
        run: BUILD_DIR=build bash scripts/check-test-counts.sh

      # ── Structural gate: end-to-end smoke (try_it.sh) ──────────────────
      # The user-facing quick-start script: configure + build + run the
      # full ctest + run the Euclidean example on a bundled mesh.  If
      # this regresses, README quick-start instructions are broken.
      # try_it.sh creates its own build-try/ — accept the ~3 min cost as
      # the price of guaranteeing the documented workflow stays working.
      - name: End-to-end smoke test (scripts/try_it.sh)
        run: bash scripts/try_it.sh

# ─────────────────────────────────────────────────────────────────────────────
# Job 3 — quality-gates  (style + convention block)
#
# Cheap, deterministic checks that should never break unless a contributor
# introduces a regression.  Each gate is a script under scripts/quality/
# and exits 0 only when its tree is clean.  These ran for weeks locally
# at zero findings before being promoted here.
#
# Tools installed at job-start (the ci-cpp image already has python3 +
# bash; we add codespell + shellcheck on top).  Total wall-time: ~30 s
# on the eulernest runner.
#
# Strictly required for merges into main/dev — a regression fails the PR.
# ─────────────────────────────────────────────────────────────────────────────
  quality-gates:
    needs: test-fast
    runs-on: eulernest
    container:
      image: git.eulernest.eu/conformallab/ci-cpp:latest

    steps:
      - uses: actions/checkout@v4

      - name: Install codespell + shellcheck (job-local)
        run: |
          apt-get update -qq
          apt-get install -y --no-install-recommends \
            codespell shellcheck

      - name: License headers (every C++ source carries MIT SPDX)
        run: bash scripts/quality/license-headers.sh

      - name: CGAL conventions (6 rules over CGAL public headers)
        run: python3 scripts/quality/cgal-conventions.py

      - name: codespell (docs + source comments + script messages)
        run: bash scripts/quality/codespell.sh

      - name: shellcheck (scripts/**/*.sh, severity=warning, strict)
        run: bash scripts/quality/shellcheck.sh --strict

      - name: Summary
        if: always()
        run: |
          echo "QUALITY ▸ all four gates passed."
          echo "  see scripts/quality/README.md for the full catalogue"
          echo "  (sanitizers, clang-tidy, coverage, etc. are local-only)"