name: Frontend tests
on:
  pull_request:
  push:
    branches:
      - main
      - release-*.*.*

permissions: {}

jobs:
  detect-changes:
    name: Detect whether code changed
    runs-on: ubuntu-latest
    permissions:
      contents: read
    outputs:
      changed: ${{ steps.detect-changes.outputs.frontend }}
    steps:
      - uses: actions/checkout@v4
        with:
          persist-credentials: true # required to get more history in the changed-files action
          fetch-depth: 2
      - name: Detect changes
        id: detect-changes
        uses: ./.github/actions/change-detection
        with:
          self: .github/workflows/pr-frontend-unit-tests.yml

  frontend-unit-tests:
    permissions:
      contents: read
      id-token: write
    # Run this workflow only for PRs from forks; if it gets merged into `main` or `release-*`,
    # the `frontend-unit-tests-enterprise` workflow will run instead
    needs: detect-changes
    if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == true && needs.detect-changes.outputs.changed == 'true'
    runs-on: ubuntu-latest-8-cores
    name: "Unit tests (${{ matrix.chunk }} / 8)"
    strategy:
      fail-fast: false
      matrix:
        chunk: [1, 2, 3, 4, 5, 6, 7, 8]
    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - uses: actions/setup-node@v4
      with:
        node-version-file: '.nvmrc'
        cache: 'yarn'
        cache-dependency-path: 'yarn.lock'
    - run: yarn install --immutable --check-cache
    - run: yarn run test:ci
      env:
        TEST_MAX_WORKERS: 2
        TEST_SHARD: ${{ matrix.chunk }}
        TEST_SHARD_TOTAL: 8

  frontend-unit-tests-enterprise:
    permissions:
      contents: read
      id-token: write
    # Run this workflow for non-PR events (like pushes to `main` or `release-*`) OR for internal PRs (PRs not from forks)
    needs: detect-changes
    if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.fork == false && needs.detect-changes.outputs.changed == 'true'
    runs-on: ubuntu-latest-8-cores
    name: "Unit tests (${{ matrix.chunk }} / 8)"
    strategy:
      fail-fast: false
      matrix:
        chunk: [1, 2, 3, 4, 5, 6, 7, 8]
    steps:
    - uses: actions/checkout@v4
      with:
        persist-credentials: false
    - uses: actions/setup-node@v4
      with:
        node-version-file: '.nvmrc'
        cache: 'yarn'
        cache-dependency-path: 'yarn.lock'
    - name: Setup Enterprise
      uses: ./.github/actions/setup-enterprise
      with:
        github-app-name: 'grafana-ci-bot'
    - run: yarn install --immutable --check-cache
    - run: yarn run test:ci
      env:
        TEST_MAX_WORKERS: 2
        TEST_SHARD: ${{ matrix.chunk }}
        TEST_SHARD_TOTAL: 8

  # This is the job that is actually required by rulesets.
  # We need to require EITHER the OSS or the Enterprise job to pass.
  # However, if one is skipped, GitHub won't flat-map the shards,
  #   so they won't be accepted by a ruleset.
  required-frontend-unit-tests:
    needs:
      - frontend-unit-tests
      - frontend-unit-tests-enterprise
    # always() is the best function here.
    # success() || failure() will skip this function if any need is also skipped.
    # That means conditional test suites will fail the entire requirement check.
    if: always()

    name: All frontend unit tests complete
    runs-on: ubuntu-latest
    steps:
      - name: Check test suites
        env:
          NEEDS: ${{ toJson(needs) }}
        run: |
          FAILURES="$(echo "$NEEDS" | jq 'with_entries(select(.value.result == "failure")) | map_values(.result)')"
          echo "$FAILURES"
          if [ "$(echo "$FAILURES" | jq '. | length')" != "0" ]; then
            exit 1
          fi
          echo "All OK!"