import { Watchable } from 'apprt-core/Types';
import Polyline from '@arcgis/core/geometry/Polyline';
import Polygon from '@arcgis/core/geometry/Polygon';
import { SystemOrAreaUnit, SystemOrLengthUnit } from '@arcgis/core/core/units';

/**
 * Measurement mode.
 * - `off`: No measurement is active.
 * - `area`: Area measurement is active.
 * - `distance`: Distance measurement is active.
 */
type Measurement2DMode = "off" | "area" | "distance";
/**
 * Measurement state.
 * - `disabled`: Measurement is disabled (corresponds to `off` mode).
 * - `ready`: Measurement is ready to start.
 * - `measuring`: Measurement is in progress.
 * - `measured`: Measurement is finished.
 */
type Measurement2DState = "disabled" | "ready" | "measuring" | "measured";
/**
 * {@link Watchable} properties of {@link Measurement2DModel}.
 */
interface Measurement2DModelProperties {
    /**
     * Measurement mode.
     */
    readonly mode: Measurement2DMode;
    /**
     * Measurement state.
     */
    readonly state: Measurement2DState;
    /**
     * Measurement unit is either unit system (metric, imperial) or a specific unit.
     * Available if the {@link mode} is set to `area` or `distance`.
     */
    readonly unit: SystemOrAreaUnit | SystemOrLengthUnit;
    /**
     * Locale specific representation of the length including the unit.
     * Available if the {@link mode} is set to `distance`.
     */
    readonly distance: string;
    /**
     * Locale specific representation of the area including the unit.
     * Available if the {@link mode} is set to `area`.
     */
    readonly area: string;
    /**
     * Locale specific representation of the perimeter including the unit.
     * Available if the {@link mode} is set to `area`.
     */
    readonly perimeter: string;
    /**
     * The measurement geometry.
     * Available if the {@link mode} is set to `area` or `distance`.
     * If mode is `area`, the geometry is a polygon.
     * If mode is `distance`, the geometry is a polyline.
     */
    readonly geometry: Polyline | Polygon;
    /**
     * Distance always in meters.
     * Available if the {@link mode} is set to `distance`.
     */
    readonly rawDistance: number;
    /**
     * Area always in square meter.
     * Available if the {@link mode} is set to `area`.
     */
    readonly rawArea: number;
    /**
     * Perimeter always in meters.
     * Available if the {@link mode} is set to `area`.
     */
    readonly rawPerimeter: number;
}
/**
 * A model, providing access to the current measurement state.
 * It is available as service `measurement-2d.Model`.
 *
 * See {@link Measurement2DModelProperties} for documentation of class members.
 */
interface Measurement2DModel extends Measurement2DModelProperties, Watchable<Measurement2DModelProperties> {
}

export type { Measurement2DMode, Measurement2DModel, Measurement2DModelProperties, Measurement2DState };