types.ts

// Web Bluetooth API type definitions to satisfy the compiler
// This avoids needing to install @types/web-bluetooth
export type BluetoothServiceUUID = number | string;
export type BluetoothCharacteristicUUID = number | string;

export interface BluetoothDevice extends EventTarget {
    readonly id: string;
    readonly name?: string;
    readonly gatt?: BluetoothRemoteGATTServer;
    addEventListener(type: 'gattserverdisconnected', listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
    removeEventListener(type: 'gattserverdisconnected', callback: (this: this, ev: Event) => any, useCapture?: boolean): void;
}

export interface BluetoothRemoteGATTServer {
    readonly device: BluetoothDevice;
    readonly connected: boolean;
    connect(): Promise<BluetoothRemoteGATTServer>;
    disconnect(): void;
    getPrimaryService(service: BluetoothServiceUUID): Promise<BluetoothRemoteGATTService>;
}

export interface BluetoothRemoteGATTService {
    getCharacteristic(characteristic: BluetoothCharacteristicUUID): Promise<BluetoothRemoteGATTCharacteristic>;
}

export interface BluetoothRemoteGATTCharacteristic extends EventTarget {
    readonly value?: DataView;
    startNotifications(): Promise<BluetoothRemoteGATTCharacteristic>;
    addEventListener(type: 'characteristicvaluechanged', listener: (this: this, ev: Event) => any, useCapture?: boolean): void;
    removeEventListener(type: 'characteristicvaluechanged', callback: (this: this, ev: Event) => any, useCapture?: boolean): void;
}

export interface BluetoothRequestDeviceOptions {
    filters?: { services?: BluetoothServiceUUID[] }[];
    optionalServices?: BluetoothServiceUUID[];
}

declare global {
    interface Navigator {
        bluetooth: {
            requestDevice(options?: BluetoothRequestDeviceOptions): Promise<BluetoothDevice>;
        };
    }
}

export type ConnectionStatus = 'disconnected' | 'connecting' | 'connected' | 'error';

export interface Prediction {
  timestamp: number;
  scores: Record<string, number>;
}

export interface HydrationEntry {
  time: Date;
}