name: Linux

on:
  pull_request:
    paths-ignore:
      - "docs/**"
      - "website/**"
      - "README.md"
      - ".github/actions/build-docs/action.yml"
      - ".github/workflows/deploy.yml"
      - ".github/workflows/pr-preview.yml"
      - ".github/workflows/pr-preview-cleanup.yml"
  push:
    branches:
      - main

permissions:
  contents: read

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

jobs:
  smoke-linux:
    name: Smoke Tests
    runs-on: ubuntu-latest
    timeout-minutes: 30
    env:
      # Force X11 mode (Xvfb) — no Wayland on CI.
      XDG_SESSION_TYPE: x11
      DISPLAY: ":99"
      # Headless GTK: avoid dconf issues, enable accessibility bridge.
      GSETTINGS_BACKEND: memory
      NO_AT_BRIDGE: "0"
      GTK_A11Y: atspi
      GTK_MODULES: "gail:atk-bridge"
    steps:
      - name: Checkout
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Install Linux desktop dependencies
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y -qq \
            xvfb \
            xdotool \
            scrot \
            at-spi2-core \
            python3-gi \
            gir1.2-atspi-2.0 \
            libatk-adaptor \
            dbus-x11 \
            gnome-calculator \
            wmctrl

      - name: Setup toolchain
        uses: ./.github/actions/setup-node-pnpm

      - name: Start Xvfb and D-Bus
        run: |
          # Start virtual framebuffer (1280x1024, 24-bit color)
          Xvfb :99 -screen 0 1280x1024x24 &
          sleep 1

          # Start a D-Bus session and export its env vars for subsequent steps.
          # dbus-launch forks a persistent daemon, so it survives the step.
          eval "$(dbus-launch --sh-syntax)"
          echo "DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS" >> "$GITHUB_ENV"
          echo "DBUS_SESSION_BUS_PID=$DBUS_SESSION_BUS_PID" >> "$GITHUB_ENV"

      - name: Start AT-SPI2 registry
        run: |
          # The registry must start AFTER DBUS_SESSION_BUS_ADDRESS is available
          # (it was written to GITHUB_ENV in the previous step).
          ATSPI_REG=$(find /usr -name at-spi2-registryd -type f 2>/dev/null | head -1)
          if [ -z "$ATSPI_REG" ]; then
            echo "::error::at-spi2-registryd not found. Install at-spi2-core."
            exit 1
          fi
          "$ATSPI_REG" &
          sleep 2
          # Health probe: verify the registry is reachable on the a11y bus
          if python3 -c "import gi; gi.require_version('Atspi','2.0'); from gi.repository import Atspi; d=Atspi.get_desktop(0); assert d is not None, 'desktop is None'; print(f'AT-SPI2 OK — {d.get_child_count()} apps')"; then
            echo "AT-SPI2 registry healthy"
          else
            echo "::error::AT-SPI2 registry started but health probe failed"
            exit 1
          fi

      - name: Verify environment
        run: |
          echo "=== Display ==="
          xdotool getdisplaygeometry
          echo "=== D-Bus ==="
          echo "DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS"
          echo "=== AT-SPI2 Python bindings ==="
          python3 -c "import gi; gi.require_version('Atspi', '2.0'); from gi.repository import Atspi; print('OK')"
          echo "=== AT-SPI2 tree dump (quick test) ==="
          python3 src/platforms/linux/atspi-dump.py --surface desktop --max-nodes 5 | python3 -m json.tool | head -20 || echo "::warning::AT-SPI2 tree dump returned no nodes (expected before any app is launched)"
          echo "=== xdotool ==="
          xdotool version

      - name: Run Linux replay smoke test
        run: |
          pnpm clean:daemon
          node --experimental-strip-types src/bin.ts test test/integration/replays/linux \
            --retries 2 \
            --report-junit test/artifacts/replays-linux.junit.xml

      - name: Upload Linux artifacts
        if: always()
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
        with:
          name: linux-artifacts
          if-no-files-found: ignore
          path: |
            test/artifacts/**
            test/screenshots/**