/**
 * @fileoverview Declarations for the Holistic API.
 */

/**
 * Version number of this package.
 */
export const VERSION: string;

/**
 * Represents pairs of (start,end) indexes so that we can connect landmarks
 * with lines to provide a skeleton when we draw the points.
 */
export declare type LandmarkConnectionArray = Array<[number, number]>;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_LIPS: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_LEFT_EYE: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_LEFT_EYEBROW: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_LEFT_IRIS: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_RIGHT_EYE: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_RIGHT_EYEBROW: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_RIGHT_IRIS: LandmarkConnectionArray;

/**
 * Subgroup of FACEMESH_CONNECTIONS.
 */
export declare const FACEMESH_FACE_OVAL: LandmarkConnectionArray;

/**
 * onResults returns an array of landmarks. This array provides the combination
 * of contours listed above.
 */
export declare const FACEMESH_CONTOURS: LandmarkConnectionArray;

/**
 * onResults returns an array of landmarks. This array provides the edges of
 * the full set of landmarks.
 */
export declare const FACEMESH_TESSELATION: LandmarkConnectionArray;

/**
 * PoseEvent.onPose returns an array of landmarks. This array provides the
 * edges to connect those landmarks to one another.
 */
export declare const POSE_CONNECTIONS: LandmarkConnectionArray;

/**
 * HandEvent.onHand returns an array of landmarks. This array provides the
 * edges to connect those landmarks to one another.
 */
export declare const HAND_CONNECTIONS: LandmarkConnectionArray;

/**
 * Provide a way to access landmarks by their friendly names. Using an
 * interface allows us to prevent obfuscation for external javascript linkage,
 * while still allowing optimization for internal linkages.
 */
export declare const POSE_LANDMARKS: {
  NOSE: number,
  RIGHT_EYE_INNER: number,
  RIGHT_EYE: number,
  RIGHT_EYE_OUTER: number,
  LEFT_EYE_INNER: number,
  LEFT_EYE: number,
  LEFT_EYE_OUTER: number,
  RIGHT_EAR: number,
  LEFT_EAR: number,
  MOUTH_RIGHT: number,
  MOUTH_LEFT: number,
  RIGHT_SHOULDER: number,
  LEFT_SHOULDER: number,
  RIGHT_ELBOW: number,
  LEFT_ELBOW: number,
  RIGHT_WRIST: number,
  LEFT_WRIST: number,
  RIGHT_PINKY: number,
  LEFT_PINKY: number,
  RIGHT_INDEX: number,
  LEFT_INDEX: number,
  RIGHT_THUMB: number,
  LEFT_THUMB: number,
  RIGHT_HIP: number,
  LEFT_HIP: number
};


/**
 * Just the left-side landmarks for pose.
 */
export declare const POSE_LANDMARKS_LEFT: {
  LEFT_EYE_INNER: number,
  LEFT_EYE: number,
  LEFT_EYE_OUTER: number,
  LEFT_EAR: number,
  LEFT_RIGHT: number,
  LEFT_SHOULDER: number,
  LEFT_ELBOW: number,
  LEFT_WRIST: number,
  LEFT_PINKY: number,
  LEFT_INDEX: number,
  LEFT_THUMB: number,
  LEFT_HIP: number,
  LEFT_KNEE: number,
  LEFT_ANKLE: number,
  LEFT_HEEL: number,
  LEFT_FOOT_INDEX: number,
};

/**
 * Just the right-side landmarks for pose.
 */
export declare const POSE_LANDMARKS_RIGHT: {
  RIGHT_EYE_INNER: number,
  RIGHT_EYE: number,
  RIGHT_EYE_OUTER: number,
  RIGHT_EAR: number,
  RIGHT_LEFT: number,
  RIGHT_SHOULDER: number,
  RIGHT_ELBOW: number,
  RIGHT_WRIST: number,
  RIGHT_PINKY: number,
  RIGHT_INDEX: number,
  RIGHT_THUMB: number,
  RIGHT_HIP: number,
  RIGHT_KNEE: number,
  RIGHT_ANKLE: number,
  RIGHT_HEEL: number,
  RIGHT_FOOT_INDEX: number
};

/**
 * Just the neutral landmarks for pose.
 */
export declare const POSE_LANDMARKS_NEUTRAL: {
  NOSE: number,
};

/**
 * Represents a single normalized landmark.
 */
export declare interface NormalizedLandmark {
  x: number;
  y: number;
  z: number;
  visibility?: number;
}

/**
 * One list of landmarks.
 */
export type NormalizedLandmarkList = NormalizedLandmark[];

/**
 * Multiple lists of landmarks.
 */
export type NormalizedLandmarkListList = NormalizedLandmarkList[];

/**
 * Represents a single landmark (not normalized).
 */
export interface Landmark extends NormalizedLandmark {}

/**
 * Detected points are returned as a collection of landmarks.
 */
export type LandmarkList = Landmark[];

/**
 * We support several ways to get image inputs.
 */
export type InputImage = HTMLVideoElement|HTMLImageElement|HTMLCanvasElement;

/**
 * Legal inputs.
 */
export interface InputMap {
  image: InputImage;
}

/**
 * GpuBuffers should all be compatible with Canvas' `drawImage`
 */
type GpuBuffer = HTMLCanvasElement|HTMLImageElement|ImageBitmap;

/**
 * The descriptiong of the hand represented by the corresponding landmarks.
 */
export interface Holisticedness {
  /**
   * Index of the object as it appears in multiHolisticLandmarks.
   */
  index: number;
  /**
   * Confidence score between 0..1.
   */
  score: number;
  /**
   * Identifies which hand is detected at this index.
   */
  label: 'Right'|'Left';
}

/**
 * Shows the vertex type of a mesh in order to decode the vertex buffer list.
 */
export interface VertexType {
  VERTEX_PT: 0;  // Position (XYZ) + Texture (UV)
}

/**
 * Shows the type of primitive shape in a mesh in order to give shape.
 */
export interface PrimitiveType {
  TRIANGLE: 0;
}

/**
 * Represents the Layout of a Matrix for the MatrixData proto
 */
export interface Layout {
  COLUMN_MAJOR: 0;
  ROW_MAJOR: 1;
}

/**
 * Represents the parameters a camera has.
 */
export interface CameraParams {
  verticalFovDegrees: number;
  near: number;
  far: number;
}

/**
 * Collects the enums into a single namespace
 */
export declare const FACE_GEOMETRY: {
  VertexType: VertexType,
  PrimitiveType: PrimitiveType,
  Layout: Layout,
  DEFAULT_CAMERA_PARAMS: CameraParams,
};

/**
 * A representation of a mesh given by the Mesh3d proto
 * google3/third_party/mediapipe/modules/face_geometry/protos/mesh_3d.proto
 */
export interface Mesh {
  getVertexBufferList(): Float32Array;
  getVertexType(): VertexType;
  getIndexBufferList(): Uint32Array;
  getPrimitiveType(): PrimitiveType;
}

/**
 * A representation of a matrix given by the MatrixData proto.
 * google3/research/drishti/framework/formats/matrix_data.proto
 */
export interface MatrixData {
  getPackedDataList(): number[];
  getRows(): number;
  getCols(): number;
  getLayout(): Layout;
}

/**
 * A representation of a face geometry from the face geometry proto.
 * google3/third_party/mediapipe/modules/face_geometry/protos/face_geometry.proto
 */
export interface FaceGeometry {
  getMesh(): Mesh;
  getPoseTransformMatrix(): MatrixData;
}

/**
 * Possible results from Holistic.
 */
export interface Results {
  poseLandmarks: NormalizedLandmarkList;
  faceLandmarks: NormalizedLandmarkList;
  multiFaceGeometry: FaceGeometry[];
  rightHandLandmarks: NormalizedLandmarkList;
  leftHandLandmarks: NormalizedLandmarkList;
  segmentationMask: GpuBuffer;
  image: GpuBuffer;
}

/**
 * Configurable options for Holistic.
 */
export interface Options {
  enableFaceGeometry?: boolean;
  selfieMode?: boolean;
  modelComplexity?: 0|1|2;
  smoothLandmarks?: boolean;
  enableSegmentation?: boolean;
  smoothSegmentation?: boolean;
  refineFaceLandmarks?: boolean;
  minDetectionConfidence?: number;
  minTrackingConfidence?: number;
}

/**
 * Listener for any results from Holistic.
 */
export type ResultsListener = (results: Results) => (Promise<void>|void);

/**
 * Contains all of the setup options to drive the hand solution.
 */
export interface HolisticConfig {
  locateFile?: (path: string, prefix?: string) => string;
}

/**
 * Declares the interface of Holistic.
 */
declare interface HolisticInterface {
  close(): Promise<void>;
  onResults(listener: ResultsListener): void;
  initialize(): Promise<void>;
  reset(): void;
  send(inputs: InputMap): Promise<void>;
  setOptions(options: Options): void;
}

/**
 * Encapsulates the entire Holistic solution. All that is needed from the
 * developer is the source of the image data. The user will call `send`
 * repeatedly and if a hand is detected, then the user can receive callbacks
 * with this metadata.
 */
export declare class Holistic implements HolisticInterface {
  constructor(config?: HolisticConfig);

  /**
   * Shuts down the object. Call before creating a new instance.
   */
  close(): Promise<void>;

  /**
   * Registers a single callback that will carry any results that occur
   * after calling Send().
   */
  onResults(listener: ResultsListener): void;

  /**
   * Initializes the solution. This includes loading ML models and mediapipe
   * configurations, as well as setting up potential listeners for metadata. If
   * `initialize` is not called manually, then it will be called the first time
   * the developer calls `send`.
   */
  initialize(): Promise<void>;

  /**
   * Tells the graph to restart before the next frame is sent.
   */
  reset(): void;

  /**
   * Processes a single frame of data, which depends on the options sent to the
   * constructor.
   */
  send(inputs: InputMap): Promise<void>;

  /**
   * Adjusts options in the solution. This may trigger a graph reload the next
   * time the graph tries to run.
   */
  setOptions(options: Options): void;
}