name: Sencho CI

on:
  pull_request:
    branches: [main]
  push:
    branches: [main]
    # Screenshot auto-merge commits only touch docs/images/.
    # Ignoring this path breaks the cascade:
    #   merge PR → screenshots PR auto-merges → would re-trigger CI → now skipped.
    # The next real merge will sync everything (rsync --delete does a full mirror).
    paths-ignore:
      - 'docs/images/**'

# Cancel previous runs on the same branch/PR
concurrency:
  group: ci-${{ github.ref }}
  cancel-in-progress: true

# Least-privilege default for every job. Individual jobs may override (e.g.
# update-screenshots needs contents: write + pull-requests: write to open a PR).
permissions:
  contents: read

# ---------------------------------------------------------------------------
# Build & Validation (PRs only, skipped for release-please PRs)
# ---------------------------------------------------------------------------
jobs:
  backend:
    name: Backend (Build, Test, Lint)
    runs-on: ubuntu-latest
    timeout-minutes: 10
    # Skip on bot PRs that only touch version metadata (release-please) or
    # doc screenshots. Neither changes the backend surface, so running the
    # full build+test+lint+audit stack is pure action-minute waste.
    if: >-
      github.event_name == 'pull_request'
      && github.head_ref != 'release-please--branches--main--components--sencho'
      && github.head_ref != 'chore/refresh-screenshots'
    steps:
      - name: Checkout Code
        uses: actions/checkout@v6

      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: '20'
          cache: 'npm'
          cache-dependency-path: backend/package-lock.json

      - name: Install Dependencies
        working-directory: ./backend
        run: npm ci

      - name: Build (TypeScript)
        working-directory: ./backend
        run: npm run build

      - name: Unit Tests (Vitest)
        working-directory: ./backend
        run: npm test

      - name: Lint (ESLint)
        working-directory: ./backend
        run: npm run lint

      - name: Audit Dependencies
        working-directory: ./backend
        run: npm audit --audit-level=high

  frontend:
    name: Frontend (Build, Lint)
    runs-on: ubuntu-latest
    timeout-minutes: 10
    # See backend job rationale: skip bot PRs that cannot affect the frontend.
    if: >-
      github.event_name == 'pull_request'
      && github.head_ref != 'release-please--branches--main--components--sencho'
      && github.head_ref != 'chore/refresh-screenshots'
    steps:
      - name: Checkout Code
        uses: actions/checkout@v6

      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: '20'
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install Dependencies
        working-directory: ./frontend
        run: npm ci

      - name: Build (Vite/React)
        working-directory: ./frontend
        run: npm run build

      - name: Lint (ESLint)
        working-directory: ./frontend
        run: npm run lint

      - name: Audit Dependencies
        working-directory: ./frontend
        run: npm audit --audit-level=high

  docker-validate:
    name: Docker Build & Scan
    runs-on: ubuntu-latest
    timeout-minutes: 15
    # See backend job rationale.
    if: >-
      github.event_name == 'pull_request'
      && github.head_ref != 'release-please--branches--main--components--sencho'
      && github.head_ref != 'chore/refresh-screenshots'
    steps:
      - name: Checkout Code
        uses: actions/checkout@v6

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Build Docker image (validation only)
        uses: docker/build-push-action@v7
        with:
          context: .
          push: false
          load: true
          tags: sencho:pr-test
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Scan image for vulnerabilities (Trivy)
        # Hard-fails the PR on any HIGH or CRITICAL finding that is not listed
        # in .trivyignore at the repo root. To accept a CVE, add it to that
        # file with a human-readable justification comment, not here.
        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # v0.35.0
        with:
          image-ref: sencho:pr-test
          exit-code: '1'
          severity: 'CRITICAL,HIGH'
          format: 'table'

  # ---------------------------------------------------------------------------
  # E2E Tests (PRs only, skipped for release-please PRs)
  # ---------------------------------------------------------------------------
  e2e:
    name: E2E Tests (Playwright)
    runs-on: ubuntu-latest
    timeout-minutes: 15
    needs: [backend, frontend]
    # See backend job rationale.
    if: >-
      github.event_name == 'pull_request'
      && github.head_ref != 'release-please--branches--main--components--sencho'
      && github.head_ref != 'chore/refresh-screenshots'
    steps:
      - name: Checkout Code
        uses: actions/checkout@v6

      - name: Start app & install Playwright
        uses: ./.github/actions/start-app

      - name: Run E2E tests
        run: npx playwright test

      - name: Upload E2E report and service logs
        if: failure()
        uses: actions/upload-artifact@v7
        with:
          name: playwright-report
          path: |
            e2e/report/
            test-results/
            ci-logs/
          retention-days: 7

  # ---------------------------------------------------------------------------
  # Post-release only: Screenshot refresh
  # Only runs when release-please merges a "chore(main): release" commit,
  # so screenshots are refreshed once per release - not on every merge.
  # ---------------------------------------------------------------------------
  update-screenshots:
    name: Refresh Doc Screenshots
    runs-on: ubuntu-latest
    timeout-minutes: 15
    if: >-
      github.event_name == 'push'
      && github.ref == 'refs/heads/main'
      && startsWith(github.event.head_commit.message, 'chore(main): release')
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Checkout Code
        uses: actions/checkout@v6
        with:
          token: ${{ secrets.DOCS_REPO_TOKEN }}

      - name: Start app & install Playwright
        uses: ./.github/actions/start-app

      - name: Capture screenshots
        run: npx playwright test e2e/screenshots.spec.ts --project=chromium

      - name: Open / update screenshots PR
        id: create-pr
        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1
        with:
          token: ${{ secrets.DOCS_REPO_TOKEN }}
          branch: chore/refresh-screenshots
          commit-message: "docs: refresh screenshots"
          title: "docs: refresh screenshots"
          body: "Automated screenshot refresh - generated by the `update-screenshots` CI job on push to `main`."
          add-paths: docs/images/
          delete-branch: true

      - name: Auto-merge screenshots PR
        if: steps.create-pr.outputs.pull-request-number != ''
        env:
          GH_TOKEN: ${{ secrets.DOCS_REPO_TOKEN }}
        run: |
          gh pr merge ${{ steps.create-pr.outputs.pull-request-number }} \
            --squash \
            --repo ${{ github.repository }}

  sync-docs:
    name: Sync Docs to sencho-docs
    runs-on: ubuntu-latest
    timeout-minutes: 5
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    steps:
      - name: Checkout Sencho repo
        uses: actions/checkout@v6
        with:
          path: sencho
          # Need the previous commit to diff against for the docs-change gate.
          fetch-depth: 2

      # Skip the clone/rsync/commit work entirely when the push doesn't touch
      # docs/. rsync --delete is a no-op in that case anyway, but spinning up
      # the runner + cloning sencho-docs + computing the diff still burns
      # ~30s of action minutes per non-docs push to main. With multiple
      # non-docs merges per day this adds up fast.
      - name: Detect docs changes
        id: detect
        working-directory: sencho
        run: |
          if git diff --name-only HEAD~1 HEAD -- docs/ | grep -q .; then
            echo "changed=true" >> "$GITHUB_OUTPUT"
          else
            echo "changed=false" >> "$GITHUB_OUTPUT"
            echo "No changes under docs/ in this commit; skipping sync."
          fi

      - name: Clone or init sencho-docs
        if: steps.detect.outputs.changed == 'true'
        env:
          DOCS_TOKEN: ${{ secrets.DOCS_REPO_TOKEN }}
        run: |
          rm -rf sencho-docs

          REMOTE="https://x-access-token:${DOCS_TOKEN}@github.com/AnsoCode/sencho-docs.git"

          if git clone "${REMOTE}" sencho-docs 2>/dev/null; then
            echo "Cloned existing sencho-docs."
          else
            echo "Clone failed (repo is empty or has no default branch) - initializing."
            mkdir -p sencho-docs
            cd sencho-docs
            git init
            git checkout -b main
            git remote add origin "${REMOTE}"
          fi

      - name: Copy /docs into sencho-docs root
        if: steps.detect.outputs.changed == 'true'
        run: rsync -av --delete --exclude='.git' sencho/docs/ sencho-docs/

      - name: Commit and push to sencho-docs
        if: steps.detect.outputs.changed == 'true'
        working-directory: sencho-docs
        run: |
          git config user.email "docs-bot@sencho.io"
          git config user.name "Sencho Docs Bot"
          git add -A
          git commit -m "docs: sync from main@${{ github.sha }}" || echo "No changes to commit"
          git push origin HEAD:main