# Ephemeral Hetzner Cloud CI: a fresh ccx53 VM is created per run, the full
# build + e2e suites run on it, then it is destroyed. No persistent infra.
#
# Lifecycle (Cyclenerd/hcloud-github-runner): create-runner spins up a Hetzner
# VM registered as an ephemeral self-hosted runner -> build-and-test runs on it
# -> delete-runner tears it down (always, even on failure -> no lingering cost).
#
# Required repo secrets (emergence-engineering/pcbjam -> Settings -> Secrets):
#   HCLOUD_TOKEN        Hetzner Cloud API token, Read & Write
#   HETZNER_RUNNER_PAT  GitHub PAT with Administration: read & write (registers
#                       and unregisters the self-hosted runner)
#
# Submodules: kicad/wxwidgets use SSH URLs (.gitmodules) but point at PUBLIC repos,
# so actions/checkout rewrites them to HTTPS and the default GITHUB_TOKEN reads them.

name: CI (Hetzner)

# Manual-only (workflow_dispatch): every run costs a paid ephemeral Hetzner VM.
# Main-branch CI is ci-full-build.yml.
on:
  workflow_dispatch:
    inputs:
      binaryen_cores:
        description: "BINARYEN_CORES for the wasm-opt/asyncify step (blank = all cores / nproc). Use to A/B core counts."
        required: false
        default: ""

concurrency:
  group: ci-hetzner-${{ github.ref }}
  cancel-in-progress: true

jobs:
  create-runner:
    name: Create Hetzner runner
    runs-on: ubuntu-latest # or ubicloud-standard-2 if GitHub-hosted is disabled
    outputs:
      label: ${{ steps.create.outputs.label }}
      server_id: ${{ steps.create.outputs.server_id }}
    steps:
      - name: Create ephemeral ccx53 runner
        id: create
        uses: Cyclenerd/hcloud-github-runner@v1
        with:
          mode: create
          github_token: ${{ secrets.HETZNER_RUNNER_PAT }}
          hcloud_token: ${{ secrets.HCLOUD_TOKEN }}
          server_type: ccx53
          location: nbg1
          image: ubuntu-24.04

  build-and-test:
    name: Build & test (Hetzner ccx53)
    needs: create-runner
    runs-on: ${{ needs.create-runner.outputs.label }}
    timeout-minutes: 160 # cold --build-deps dominates; + wx build + both suites
    env:
      # Stream build-script output straight to the Actions log instead of
      # redirecting it to logs/<script>/<ts>.log (see scripts/common/logging.sh,
      # which returns early when KICAD_LOG_NESTED=1). Nothing consumes
      # KICAD_LOG_FILE, so this is safe and gives live, greppable CI output.
      KICAD_LOG_NESTED: "1"
    steps:
      # Hetzner's ubuntu-24.04 cloud image ships neither Docker nor git (Ubicloud
      # preinstalled both). Install Docker CE + git before the Docker-based build.
      - name: Install system deps (Docker, git)
        run: |
          export DEBIAN_FRONTEND=noninteractive
          sudo apt-get update
          # libjemalloc2: scalable allocator preloaded into the host-side wasm-opt
          # passes (scripts/common/apply-asyncify.sh) to avoid glibc malloc
          # arena-lock contention, which otherwise burns ~half of wasm-opt's CPU
          # in futex lock-spin under many threads.
          # autoconf/automake: build-wxuniversal-wasm.sh regenerates wxWidgets'
          # ./configure from configure.in on a fresh checkout (git doesn't
          # preserve mtimes, so configure.in looks newer). make: the host-side
          # wxWidgets + wasm-test builds drive emconfigure/emmake/make directly.
          # All of this runs on the bare host (not in Docker), and the Hetzner
          # ubuntu-24.04 cloud image is minimal, so these must be installed here.
          sudo apt-get install -y ca-certificates curl git libjemalloc2 autoconf automake make
          # toolchain for BINARYEN_BUILD_FROM_SOURCE (get-wasm-opt.sh)
          sudo apt-get install -y cmake ninja-build g++
          sudo install -m 0755 -d /etc/apt/keyrings
          curl -fsSL https://download.docker.com/linux/ubuntu/gpg \
            | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
          sudo chmod a+r /etc/apt/keyrings/docker.gpg
          echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
            https://download.docker.com/linux/ubuntu $(. /etc/os-release && echo $VERSION_CODENAME) stable" \
            | sudo tee /etc/apt/sources.list.d/docker.list >/dev/null
          sudo apt-get update
          sudo apt-get install -y docker-ce docker-ce-cli containerd.io \
            docker-buildx-plugin docker-compose-plugin

      - name: Checkout (with submodules)
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Show disk space
        run: df -h

      - name: Set up Node
        uses: actions/setup-node@v4
        with:
          node-version: 20

      # 1) Cold build KiCad WASM app + all dependencies (Docker; longest step).
      #    ccx53 has 32 vCPU / 128 GB RAM, so use every core: -j $(nproc) for the
      #    C++ compile and, by default, for the host-side wasm-opt/asyncify
      #    (apply-asyncify.sh runs on the host and reads BINARYEN_CORES). The
      #    workflow_dispatch input overrides BINARYEN_CORES so we can A/B core
      #    counts (e.g. 8 vs 32) without editing the workflow; blank = nproc.
      - name: Build KiCad WASM (all, --build-deps)
        env:
          BINARYEN_CORES_INPUT: ${{ github.event.inputs.binaryen_cores }}
        run: |
          CORES="${BINARYEN_CORES_INPUT:-$(nproc)}"
          # Lift the docker-compose dev-Mac resource caps (10 CPUs / 32G) so the
          # container compile actually uses the ccx53's 32 cores / 128 GB.
          export KICAD_DOCKER_CPUS="$(nproc)" KICAD_DOCKER_MEM=110G
          # Self-built wasm-opt: official Linux tarball runs asyncify 4x slower
          # (see get-wasm-opt.sh / run 27276830256). Identical output, sha256-verified.
          export BINARYEN_BUILD_FROM_SOURCE=1
          echo "Build parallelism: compile -j $(nproc) on ${KICAD_DOCKER_CPUS} CPUs, BINARYEN_CORES=${CORES}"
          BINARYEN_CORES="${CORES}" ./docker/build.sh eeschema --build-deps -j "$(nproc)"

      # 2) Host-side wxWidgets build that produces the wxWidgets test apps consumed
      #    by `npm run test` (NOT produced by docker/build.sh). Auto-installs emsdk.
      - name: Build wxWidgets (wxUniversal WASM)
        run: ./scripts/build-wxuniversal-wasm.sh

      - name: Build wxWidgets test apps
        run: ./scripts/build-wasm-test.sh

      # 3) Test deps + browsers (firefox for KiCad headless, chromium for wxWidgets).
      - name: Install test deps
        working-directory: tests
        run: npm ci

      - name: Install Playwright browsers
        working-directory: tests
        run: npx playwright install --with-deps firefox chromium

      # 4) Stage KiCad artifacts from ./output into tests/apps/kicad.
      - name: Setup KiCad WASM for tests
        working-directory: tests
        run: npm run setup:kicad

      # 5) Both e2e suites. GitHub sets CI=true automatically -> workers:1, retries,
      #    fresh per-run web server (see playwright configs).
      - name: wxWidgets e2e (npm run test)
        working-directory: tests
        run: npm run test

      - name: KiCad e2e (npm run test:kicad)
        working-directory: tests
        run: npm run test:kicad

      # 6) Always capture logs/screenshots for post-mortem.
      - name: Upload test logs & results
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: e2e-logs
          path: |
            tests/logs/**
            tests/test-results/**
            tests/playwright-report/**
            logs/**
          if-no-files-found: ignore

  delete-runner:
    name: Delete Hetzner runner
    needs: [create-runner, build-and-test]
    runs-on: ubuntu-latest # match create-runner's choice
    if: always() # tear down even if the build fails -> no lingering cost
    steps:
      - name: Delete ephemeral runner
        uses: Cyclenerd/hcloud-github-runner@v1
        with:
          mode: delete
          github_token: ${{ secrets.HETZNER_RUNNER_PAT }}
          hcloud_token: ${{ secrets.HCLOUD_TOKEN }}
          name: ${{ needs.create-runner.outputs.label }}
          server_id: ${{ needs.create-runner.outputs.server_id }}