name: Unit Tests

on:
  pull_request:
  push:
    branches:
      - main
      - master
      - develop

jobs:
  skip-budget:
    name: Skipped-test budget
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
      - name: Check skip budget
        run: node scripts/check-skip-budget.mjs

  unit-tests:
    name: Nx affected unit tests
    runs-on: ubuntu-latest
    # A microtask-spinning test starves vitest's own timeout timer entirely
    # (see billing's RenewalAutomationSettings hang), so the job needs its own
    # backstop instead of the 6h default.
    timeout-minutes: 30

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          # Required for `nx affected --base/--head` on PRs; shallow clones can miss the base SHA.
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - name: Cache Nx computation cache
        uses: actions/cache@v4
        with:
          path: .nx/cache
          key: nx-cache-${{ runner.os }}-${{ hashFiles('package-lock.json', 'nx.json', 'tsconfig.base.json', '**/project.json') }}
          restore-keys: |
            nx-cache-${{ runner.os }}-

      - name: Upgrade npm to version 11
        run: npm install -g npm@11

      # No npm install fallback: a failing npm ci means the lockfile is out of
      # sync with a package.json, and regenerating dependencies on the fly once
      # swapped vitest 3→4 and silently broke test-file serialization. Fail
      # loudly instead.
      - name: Install dependencies
        run: npm ci

      - name: Determine Nx base/head
        shell: bash
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "NX_BASE=${{ github.event.pull_request.base.sha }}" >> $GITHUB_ENV
            echo "NX_HEAD=${{ github.event.pull_request.head.sha }}" >> $GITHUB_ENV
          else
            echo "NX_BASE=${{ github.event.before }}" >> $GITHUB_ENV
            echo "NX_HEAD=${{ github.sha }}" >> $GITHUB_ENV
          fi

      # Same two-pass split as typecheck.yml: the server app's vitest config inlines
      # next/next-auth and needs most of the runner's memory to itself, so libraries
      # run in parallel first and the heavy apps run serially afterwards (libraries
      # are instant Nx cache hits in pass 2).
      # temporal-workflows' suite needs live Postgres/Redis/Temporal (49 of its
      # 71 tests fail without them) and its clients reconnect forever, so the
      # vitest process never exits and hangs the job. It has no place in a
      # unit-test gate until its tests stub their connections.
      # Non-blocking until the runner layer is repaired: the @nx/vite:test
      # executor is broken under vitest 4 (fails even fully-green suites, and
      # reports "Unable to load test config from config file undefined" for
      # the ~20 projects with no vitest.config), so a red step here measures
      # the executor, not the tests. Past green runs were Nx cache replays.
      # Restore blocking once the executor is fixed and a real failure
      # baseline exists.
      - name: Nx affected tests (libraries, parallel)
        continue-on-error: true
        run: npx nx affected -t test --base=$NX_BASE --head=$NX_HEAD --output-style=static --parallel=3 --exclude=server,sebastian-ee,temporal-workflows
        env:
          NX_DAEMON: 'false'
          NODE_OPTIONS: '--max-old-space-size=4096'
          # Fixed shuffle seed so order-dependent failures are reproducible across reruns.
          VITEST_SEED: '20260610'

      # sebastian-ee's inferred test target is a bare `vitest` over its full
      # 209-file suite (~50 minutes serial — far past this job's 30-minute
      # backstop, which it blew via WorkflowAiSchemaSection's render-loop hang
      # before that was fixed). Excluded until the suite gets a bounded
      # unit-test target that fits a PR gate.
      - name: Nx affected tests (apps, isolated & serial)
        continue-on-error: true
        run: npx nx affected -t test --base=$NX_BASE --head=$NX_HEAD --output-style=static --parallel=1 --exclude=temporal-workflows,sebastian-ee
        env:
          NX_DAEMON: 'false'
          NODE_OPTIONS: '--max-old-space-size=14336'
          VITEST_SEED: '20260610'

  # Informational coverage report for the server unit suite. Push-to-main only
  # (it re-runs the whole suite with instrumentation, too slow for every PR) and
  # non-blocking while baselines are established.
  coverage-report:
    name: Server unit coverage (informational)
    if: github.event_name == 'push'
    runs-on: ubuntu-latest
    continue-on-error: true
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
      - name: Upgrade npm to version 11
        run: npm install -g npm@11
      - name: Install dependencies
        run: npm ci
      - name: Run server unit tests with coverage
        working-directory: ./server
        run: npx vitest run src/test/unit src/test/infrastructure --coverage.enabled=true --coverage.reporter=text-summary --coverage.reporter=lcov
        env:
          NODE_OPTIONS: '--max-old-space-size=14336'
          VITEST_SEED: '20260610'
      - name: Upload lcov artifact
        uses: actions/upload-artifact@v4
        with:
          name: server-unit-coverage
          path: server/coverage/lcov.info
          retention-days: 30