name: Frontend Tests

on:
  push:
    branches: [main]
    paths:
      - "apps/cli/**"
      - "apps/package.json"
      - "apps/prettier.config.mjs"
      - "apps/.prettierignore"
      - "apps/web/**"
      - "apps/packages/**"
      - "apps/pnpm-lock.yaml"
      - "apps/backend/go.mod"
      - "apps/backend/go.sum"
      - ".github/workflows/frontend-tests.yml"
      - "!**/*.md"
      - "!**/*.mdx"
      - "!**/*.markdown"
  pull_request:
    branches: [main]
    paths:
      - "apps/cli/**"
      - "apps/package.json"
      - "apps/prettier.config.mjs"
      - "apps/.prettierignore"
      - "apps/web/**"
      - "apps/packages/**"
      - "apps/pnpm-lock.yaml"
      - "apps/backend/go.mod"
      - "apps/backend/go.sum"
      - ".github/workflows/frontend-tests.yml"
      - "!**/*.md"
      - "!**/*.mdx"
      - "!**/*.markdown"

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

jobs:
  frontend:
    name: Run Frontend Lint, Tests, and Build
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: apps

    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Set up pnpm
        uses: pnpm/action-setup@v5
        with:
          version: "9.15.9"

      - name: Set up Node.js
        uses: actions/setup-node@v6
        with:
          node-version: "24"

      - name: Install dependencies
        run: pnpm install --frozen-lockfile

      - name: Set up Go
        uses: actions/setup-go@v6
        with:
          go-version-file: apps/backend/go.mod
          cache-dependency-path: apps/backend/go.sum

      - name: Install go-licenses
        run: go install github.com/google/go-licenses@latest

      - name: Regenerate OSS licenses manifest
        run: pnpm --filter @kandev/web licenses:gen

      - name: Verify licenses manifest is fresh
        shell: bash
        continue-on-error: true
        run: |
          set -euo pipefail
          # `defaults.run.working-directory` is `apps`, so the path is relative.
          # The diff is reported as a warning, not a hard failure: `go-licenses`
          # resolves slightly different license metadata across platforms (macOS
          # dev vs. ubuntu CI) for the same Go modules, and we have not yet
          # eliminated that drift. The committed file is still the source of
          # truth for what the page renders.
          if ! git diff --quiet --exit-code web/generated/licenses.json; then
            echo "::warning::apps/web/generated/licenses.json differs from a fresh re-run."
            echo "::warning::Run 'pnpm --filter @kandev/web licenses:gen' and commit if the drift is real."
            git --no-pager diff --stat web/generated/licenses.json || true
          fi

      - name: Check formatting
        shell: bash
        run: |
          set -euo pipefail

          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            BASE_SHA="${{ github.event.pull_request.base.sha }}"
          else
            BASE_SHA="${{ github.event.before }}"
          fi

          if [[ -z "${BASE_SHA}" || "${BASE_SHA}" == "0000000000000000000000000000000000000000" ]]; then
            BASE_SHA="$(git rev-list --max-parents=0 HEAD)"
          fi

          CHANGED_FILES="$(
            git diff --name-only --diff-filter=ACMRT "${BASE_SHA}"..."${{ github.sha }}" \
            | grep -E '^apps/(web|cli|packages)/.*\.(ts|tsx|js|jsx|mjs|cjs|json|md|mdx|yml|yaml|css|scss)$' \
            || true
          )"

          if [[ -z "${CHANGED_FILES}" ]]; then
            echo "No Prettier-scoped files changed."
            exit 0
          fi

          # Skip symlinks — prettier errors with exit 123 when an explicit
          # pattern is a symbolic link. CLAUDE.md files in the tree are symlinks
          # to sibling AGENTS.md files (Codex / Claude Code convention).
          FILES_TO_CHECK="$(
            echo "${CHANGED_FILES}" \
              | sed 's#^apps/##' \
              | while IFS= read -r f; do [ -L "$f" ] || echo "$f"; done
          )"

          if [[ -z "${FILES_TO_CHECK}" ]]; then
            echo "No non-symlink Prettier-scoped files changed."
            exit 0
          fi

          echo "Checking Prettier on changed files:"
          echo "${FILES_TO_CHECK}"
          echo "${FILES_TO_CHECK}" | xargs pnpm exec prettier --check --ignore-unknown

      - name: Run lint
        run: pnpm --filter @kandev/web lint

      - name: Run tests
        run: pnpm --filter @kandev/web test

      - name: Build
        run: pnpm --filter @kandev/web build