name: E2E Desktop

on:
  workflow_call:

permissions:
  contents: read

concurrency:
  group: e2e-desktop-${{ github.ref }}
  cancel-in-progress: true

jobs:
  e2e:
    name: Playwright E2E (Linux)
    runs-on: ubuntu-latest
    timeout-minutes: 20
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      # ── System deps for Electron on headless Ubuntu ───────────────────
      # Electron needs GTK, NSS,atk, etc. even under xvfb. Playwright's
      # install-deps covers browsers; for Electron we install the apt
      # packages directly.
      - name: Install system dependencies for Electron
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y -qq \
            xvfb \
            libgtk-3-0 libnotify4 libnss3 libxss1 libxtst6 \
            xdg-utils libatspi2.0-0 libdrm2 libgbm1 libasound2t64

      # ── Node ───────────────────────────────────────────────────────────
      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
        with:
          node-version: 22
          cache: npm
      # Full npm ci (not --ignore-scripts): electron's postinstall
      # downloads the binary we launch, and node-pty's native build is
      # needed for the terminal pane.
      - uses: ./.github/actions/retry
        with:
          command: npm ci

      # ── Python (for the hermes serve backend) ──────────────────────────
      - name: Install uv
        uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # 8.2.0
        with:
          enable-cache: true
          cache-dependency-glob: |
            pyproject.toml
            uv.lock
      - name: Set up Python 3.11
        run: uv python install 3.11
      - name: Install Python dependencies
        uses: ./.github/actions/retry
        with:
          command: uv sync --locked --python 3.11 --extra all --extra dev

      # ── Build desktop app ─────────────────────────────────────────────
      - run: npm run --prefix apps/desktop build

      # ── Restore visual baseline screenshots from main ──────────────────
      # Baselines are generated on main (via --update-snapshots) and cached.
      # On PRs, we restore them so toHaveScreenshot has something to compare
      # against.  The cache key is keyed on the desktop source files so a
      # UI change naturally invalidates it — but we fall back to the main
      # cache to avoid cold starts on unrelated PRs.
      - name: Restore visual baseline screenshots
        id: restore-baselines
        uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
        with:
          path: apps/desktop/e2e/*-snapshots
          key: visual-baselines-${{ github.ref_name }}
          restore-keys: |
            visual-baselines-main

      # ── Run Playwright E2E under xvfb ─────────────────────────────────
      # xvfb runs at a fixed 1280x1024 screen so the 1220x800 Electron
      # window always has a consistent viewport for screenshot comparison.
      # On main, we run with --update-snapshots to generate baselines.
      - name: Run Playwright E2E tests
        working-directory: apps/desktop
        run: |
          if [ "${{ github.ref_name }}" = "main" ]; then
            echo "On main — generating/updating baseline screenshots"
            xvfb-run -a --server-args="-screen 0 1280x1024x24" \
              npx playwright test --reporter=list --update-snapshots
          else
            echo "On PR — comparing against cached baselines"
            xvfb-run -a --server-args="-screen 0 1280x1024x24" \
              npx playwright test --reporter=list
          fi
        env:
          CI: "true"
          # Ensure no real API keys leak into the test env.
          OPENROUTER_API_KEY: ""
          OPENAI_API_KEY: ""
          NOUS_API_KEY: ""

      # ── Save updated baselines to cache (main only) ───────────────────
      - name: Save updated baselines to cache
        if: github.ref_name == 'main' && always()
        uses: actions/cache/save@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
        with:
          path: apps/desktop/e2e/*-snapshots
          key: visual-baselines-main

      # ── Upload Playwright report (HTML + traces) ──────────────────────
      - name: Upload Playwright report
        id: upload-report
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: playwright-report-${{ github.sha }}
          path: apps/desktop/playwright-report
          retention-days: 14
          overwrite: true

      # ── Upload test results (screenshots, traces, diffs) ───────────────
      - name: Upload test results
        id: upload-results
        if: always()
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: playwright-test-results-${{ github.sha }}
          path: apps/desktop/test-results
          retention-days: 14
          overwrite: true

      # ── Upload just the visual diffs (small, fast to review) ──────────
      - name: Upload visual diffs
        id: upload-diffs
        if: always() && github.ref_name != 'main'
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: visual-diffs-${{ github.sha }}
          path: |
            apps/desktop/test-results/**/*-diff.png
            apps/desktop/test-results/**/*-actual.png
            apps/desktop/test-results/**/*-expected.png
          retention-days: 14
          overwrite: true
          if-no-files-found: ignore

      # ── Generate step summary with visual diff info ───────────────────
      # Parse the JSON report + scan for diff images, then post a summary
      # to the GitHub Actions step output so reviewers can see what changed
      # without downloading artifacts.  Runs AFTER uploads so it can link
      # the artifact download URLs from their step outputs.
      - name: Generate visual diff summary
        if: always()
        working-directory: apps/desktop
        env:
          REPORT_URL: ${{ steps.upload-report.outputs.artifact-url }}
          RESULTS_URL: ${{ steps.upload-results.outputs.artifact-url }}
          DIFFS_URL: ${{ steps.upload-diffs.outputs.artifact-url }}
        run: |
          echo "## Desktop E2E — Visual Diff Report" >> "$GITHUB_STEP_SUMMARY"
          echo "" >> "$GITHUB_STEP_SUMMARY"

          # Count diff images (playwright writes *-diff.png on mismatch)
          DIFF_COUNT=$(find test-results -name '*-diff.png' 2>/dev/null | wc -l)
          ACTUAL_COUNT=$(find test-results -name '*-actual.png' 2>/dev/null | wc -l)

          if [ "$DIFF_COUNT" -eq 0 ]; then
            echo "✅ All $ACTUAL_COUNT screenshot(s) matched their baselines (or no baselines existed yet)." >> "$GITHUB_STEP_SUMMARY"
          else
            echo "📸 **$DIFF_COUNT of $ACTUAL_COUNT screenshot(s) differ from baseline:**" >> "$GITHUB_STEP_SUMMARY"
            echo "" >> "$GITHUB_STEP_SUMMARY"
            echo "| Test | Diff | Actual | Expected |" >> "$GITHUB_STEP_SUMMARY"
            echo "|------|------|--------|----------|" >> "$GITHUB_STEP_SUMMARY"

            # List each diff image with a link to the artifact
            for diff in $(find test-results -name '*-diff.png' 2>/dev/null | sort); do
              base=$(echo "$diff" | sed 's/-diff\.png$//')
              test_name=$(basename "$base")
              echo "| $test_name | [diff]($diff) | [actual](${base}-actual.png) | [expected](${base}-expected.png) |" >> "$GITHUB_STEP_SUMMARY"
            done
          fi

          echo "" >> "$GITHUB_STEP_SUMMARY"
          echo "📥 **Artifacts:**" >> "$GITHUB_STEP_SUMMARY"
          echo "" >> "$GITHUB_STEP_SUMMARY"
          if [ -n "$RESULTS_URL" ]; then
            echo "- [playwright-test-results]($RESULTS_URL) — all screenshots (actual + expected + diff) + traces" >> "$GITHUB_STEP_SUMMARY"
          fi
          if [ -n "$REPORT_URL" ]; then
            echo "- [playwright-report]($REPORT_URL) — interactive HTML report" >> "$GITHUB_STEP_SUMMARY"
          fi
          if [ -n "$DIFFS_URL" ]; then
            echo "- [visual-diffs]($DIFFS_URL) — just the diffed screenshots (small, fast to review)" >> "$GITHUB_STEP_SUMMARY"
          fi
          echo "" >> "$GITHUB_STEP_SUMMARY"
          echo "**To update baselines:** merge to main (baselines auto-update on main runs) or run \`npx playwright test --update-snapshots\` locally." >> "$GITHUB_STEP_SUMMARY"

          # Also parse the JSON report for pass/fail counts
          if [ -f playwright-report/results.json ]; then
            echo "" >> "$GITHUB_STEP_SUMMARY"
            echo "### Test Results" >> "$GITHUB_STEP_SUMMARY"
            echo "" >> "$GITHUB_STEP_SUMMARY"
            node -e "
              const r = require('./playwright-report/results.json');
              const stats = r.stats || {};
              console.log('| Status | Count |');
              console.log('|--------|-------|');
              console.log('| ✅ Passed | ' + (stats.expected || 0) + ' |');
              console.log('| ❌ Failed | ' + (stats.unexpected || 0) + ' |');
              console.log('| ⏭️ Skipped | ' + (stats.skipped || 0) + ' |');
              console.log('| 🔄 Flaky | ' + (stats.flaky || 0) + ' |');
            " >> "$GITHUB_STEP_SUMMARY" 2>/dev/null || true
          fi