# Plan 01 Summary - Core Infrastructure

**Plan:** 01  
**Phase:** 01-foundation-dashboard  
**Completed:** 2026-03-13

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## Tasks Completed

### Task 1: Test Infrastructure
- Created `vitest.config.ts` - Vitest configuration extending Vite
- Created `src/test/setup.ts` - Test utilities and mocks
- Added test scripts to `package.json`
- Installed test dependencies: vitest, @testing-library/react, @testing-library/jest-dom, jsdom

### Task 2: Zustand Sensor Store
- Created `src/app/stores/sensorStore.ts`:
  - SensorData interface with rainfall, voltage, station, communication types
  - useSensorStore hook with actions: setSensorData, updatePollingInterval, setIsPolling, setError
  - Selectors: selectRainfall, selectVoltage, selectStation, selectCommunication, selectTimestamp

### Task 3: API Client with Mock Fallback
- Created `src/app/api/client.ts`:
  - fetchSensorData function with timeout and AbortController support
  - generateMockSensorData for realistic mock data
  - Automatic fallback to mock data on API failure

### Task 4: Port-based Mode Detection
- Created `src/app/hooks/useDisplayMode.ts`:
  - useDisplayMode hook returning 'kiosk' or 'remote'
  - Port 8080 → kiosk, Port 9090 → remote
- Updated `src/app/App.tsx` to use display mode and initialize polling

### Task 5: Data Polling with Cleanup
- Created `src/app/hooks/useSensorPolling.ts`:
  - Configurable polling interval (default 5 seconds)
  - Page Visibility API support (pause when hidden)
  - Proper cleanup with AbortController
  - Start/stop/refresh controls

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## Files Created/Modified

| File | Status |
|------|--------|
| src/app/stores/sensorStore.ts | Created |
| src/app/api/client.ts | Created |
| src/app/hooks/useDisplayMode.ts | Created |
| src/app/hooks/useSensorPolling.ts | Created |
| src/app/App.tsx | Modified |
| src/test/setup.ts | Created |
| vitest.config.ts | Created |
| package.json | Modified |

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## Bundle Size

- JS: 325KB uncompressed, 99KB gzipped
- CSS: 92KB uncompressed, 15KB gzipped

**Status:** Under 200KB limit (gzipped) ✓

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## Notes

- Mock data generation creates realistic values for testing
- API client gracefully falls back to mock data
- Polling pauses when tab is hidden to save resources
- Mode detection enables responsive/kiosk layouts