/**
 * BLE Device interface
 */
export interface BLEDevice {
  id: string;
  name?: string;
  rssi?: number;
  [key: string]: any;
}

/**
 * Scan configuration options
 */
export interface ScanOptions {
  timeout?: number;
  allowDuplicates?: boolean;
}

/**
 * User role types
 */
export type UserRole = 'patient' | 'nurse' | 'engineer';

/**
 * Characteristic notification event
 */
export interface CharacteristicNotification {
  deviceId: string;
  serviceUuid: string;
  characteristicUuid: string;
  value: any;
}

/**
 * Device connection state
 */
export interface DeviceConnectionState {
  deviceId: string;
  isConnected: boolean;
  isInfusionRunning: boolean;
  infusionLevel: number | null;
  notifications: {
    ff01: CharacteristicNotification | null;
    ff21: CharacteristicNotification | null;
    ff31: CharacteristicNotification | null;
    ff41: CharacteristicNotification | null;
    ff02: CharacteristicNotification | null;
  };
}

/**
 * BLE event types
 */
export type BLEEventType =
  | 'scanResult'
  | 'connected'
  | 'disconnected'
  | 'BleManagerScanFailed'
  | 'bluetoothStateChanged'
  | 'characteristicChanged';

/**
 * BLE event payloads
 */
export interface BLEEvents {
  scanResult: { device: BLEDevice };
  connected: { deviceId: string };
  disconnected: { deviceId: string };
  BleManagerScanFailed: { error: string };
  bluetoothStateChanged: { state: string };
  characteristicChanged: CharacteristicNotification;
}

/**
 * Characteristic UUIDs for notifications
 */
export enum CharacteristicUUID {
  FF01 = '0000FF01-0000-1000-8000-00805F9B34FB',
  FF21 = '0000FF21-0000-1000-8000-00805F9B34FB',
  FF31 = '0000FF31-0000-1000-8000-00805F9B34FB',
  FF41 = '0000FF41-0000-1000-8000-00805F9B34FB',
  FF02 = '0000FF02-0000-1000-8000-00805F9B34FB',
}

/**
 * BLE Manager interface
 */
export interface IBLEManager {
  isBluetoothEnabled(): Promise<boolean>;
  requestPermissions(): Promise<void>;
  startScan(options?: ScanOptions): Promise<void>;
  stopScan(): Promise<void>;
  connect(deviceId: string): Promise<void>;
  disconnect(deviceId: string): Promise<void>;
  on(event: BLEEventType, callback: (data: any) => void): void;
  removeAllListeners(): void;
}