# WebSocket Connection Improvements for InsigniaRequestProcessService

## ???????????????????

### 1. **????????? Configuration**
- ????? `WebSocketConfiguration` class ?????????????????????
- ?????????????????????? ???? appsettings.json
- ?? default values ???????????????????????

### 2. **??????????????????????? WebSocket**
- ??? `ImmutableList.Create()` ?????? Transports
- ????? event handlers ????????????????????????
- ?????? reconnection ?????????
- Thread-safe ???? lock mechanism

### 3. **??????????????? Logging**
- ??? `ILogger<T>` ??? Console.WriteLine
- ????? emoji ??????????????? log ???????????
- Log ??????????????????????????

### 4. **???????????????????**
- Proper exception handling ????????
- Graceful handling ??? cancellation
- Delay ??????????????????????????????? busy loop

### 5. **????????????????? Notification**
- ???????????????????????????????
- ????????????????????????????????
- ??????????? retry ?????????

## ?????????

### ???????????? appsettings.json
```json
{
  "WebSocket": {
    "Url": "https://bma-ehr.frappet.synology.me",
    "Path": "/api/v1/org-socket",
    "DefaultUserId": "4064c2b2-0414-464a-97c6-4a47c325b9a3",
    "ReconnectionDelay": 1000,
    "ReconnectionAttempts": 5,
    "Timeout": 20000,
    "AutoReconnect": true,
    "TaskDelayOnError": 5000
  }
}
```

### Log Messages ????????
- ?? = Service started
- ?? = Task processing
- ? = Success operations
- ? = Error/Failure
- ?? = Reconnection attempts
- ?? = WebSocket notifications
- ?? = Service stopping

## ???????????????????

1. **Reliability**: ???????????? WebSocket ???????????????????
2. **Observability**: ???????????? log ???????
3. **Configurability**: ??????????????????????? configuration
4. **Maintainability**: ???????????????????????? ??????????
5. **Resilience**: ?????????????????????????

## WebSocket Events ?????????

- `EVENT_CONNECT`: ???????????????
- `EVENT_DISCONNECT`: ????????????????
- `EVENT_ERROR`: ????????????????
- `EVENT_CONNECT_ERROR`: ????????????????????????
- `EVENT_RECONNECT`: ???????????????????
- `EVENT_RECONNECT_ERROR`: ????????????????????????????
- `EVENT_RECONNECT_FAILED`: ?????????????????????????

## Message Format ??????????? WebSocket

```javascript
{
  "success": true/false,
  "message": "Task Finish" ???? "Task Failed",
  "payload": {
    "completedAt": "timestamp",
    "taskType": "insignia_background_processing",
    "duration": 1234.56, // milliseconds
    "status": "success" ???? "failed"
    // ?????????? error ???? error ??? stackTrace ?????
  }
}
```

???????? user data:
```javascript
{
  "userId": "4064c2b2-0414-464a-97c6-4a47c325b9a3"
}
```