import { MLKitCameraView, MLKitVisionOptions, MLKitVisionResult } from '../';

export interface MLKitDetectFacesResultBounds {
	origin: {
		x: number;
		y: number;
	};
	size: {
		width: number;
		height: number;
	};
}

export interface MLKitDetectFacesResultFace {
	smilingProbability?: number;
	leftEyeOpenProbability?: number;
	rightEyeOpenProbability?: number;
	trackingId?: number;
	ios?: any;
	android?: any;
	bounds?: MLKitDetectFacesResultBounds;
	headEulerAngleZ?: number;
	headEulerAngleY?: number;
}

export interface MLKitDetectFacesOnDeviceResult extends MLKitVisionResult {
	faces: Array<MLKitDetectFacesResultFace>;
}

export type MLKitFaceDetectionMode = 'fast' | 'accurate';

export interface MLKitDetectFacesOnDeviceOptions extends MLKitVisionOptions {
	/**
	 * Favor speed or accuracy when detecting faces.
	 * Default "fast".
	 */
	detectionMode?: MLKitFaceDetectionMode;

	/**
   * Whether or not to attempt to identify facial "landmarks": eyes, ears, nose, cheeks, mouth.
   * Default "none".
   *
   // detectLandmarks?: "none" | "all";
   */

	/**
	 * The minimum size, relative to the image, of faces to detect.
	 * Default 0.1.
	 */
	minimumFaceSize?: number;

	/**
	 * Whether or not to assign faces an ID, which can be used to track faces across images.
	 * Default false.
	 */
	enableFaceTracking?: boolean;
}

export declare function detectFacesOnDevice(options: MLKitDetectFacesOnDeviceOptions): Promise<MLKitDetectFacesOnDeviceResult>;

export declare class MLKitFaceDetection extends MLKitCameraView {}