import { isNumber, } from "@turf/helpers";
/**
 * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
 *
 * @name getCoord
 * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
 * @returns {Array<number>} coordinates
 * @example
 * var pt = turf.point([10, 10]);
 *
 * var coord = turf.getCoord(pt);
 * //= [10, 10]
 */
export function getCoord(coord) {
    if (!coord) {
        throw new Error("coord is required");
    }
    if (!Array.isArray(coord)) {
        if (coord.type === "Feature" &&
            coord.geometry !== null &&
            coord.geometry.type === "Point") {
            return coord.geometry.coordinates;
        }
        if (coord.type === "Point") {
            return coord.coordinates;
        }
    }
    if (Array.isArray(coord) &&
        coord.length >= 2 &&
        !Array.isArray(coord[0]) &&
        !Array.isArray(coord[1])) {
        return coord;
    }
    throw new Error("coord must be GeoJSON Point or an Array of numbers");
}
/**
 * Unwrap coordinates from a Feature, Geometry Object or an Array
 *
 * @name getCoords
 * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
 * @returns {Array<any>} coordinates
 * @example
 * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
 *
 * var coords = turf.getCoords(poly);
 * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
 */
export function getCoords(coords) {
    if (Array.isArray(coords)) {
        return coords;
    }
    // Feature
    if (coords.type === "Feature") {
        if (coords.geometry !== null) {
            return coords.geometry.coordinates;
        }
    }
    else {
        // Geometry
        if (coords.coordinates) {
            return coords.coordinates;
        }
    }
    throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
}
/**
 * Checks if coordinates contains a number
 *
 * @name containsNumber
 * @param {Array<any>} coordinates GeoJSON Coordinates
 * @returns {boolean} true if Array contains a number
 */
export function containsNumber(coordinates) {
    if (coordinates.length > 1 &&
        isNumber(coordinates[0]) &&
        isNumber(coordinates[1])) {
        return true;
    }
    if (Array.isArray(coordinates[0]) && coordinates[0].length) {
        return containsNumber(coordinates[0]);
    }
    throw new Error("coordinates must only contain numbers");
}
/**
 * Enforce expectations about types of GeoJSON objects for Turf.
 *
 * @name geojsonType
 * @param {GeoJSON} value any GeoJSON object
 * @param {string} type expected GeoJSON type
 * @param {string} name name of calling function
 * @throws {Error} if value is not the expected type.
 */
export function geojsonType(value, type, name) {
    if (!type || !name) {
        throw new Error("type and name required");
    }
    if (!value || value.type !== type) {
        throw new Error("Invalid input to " +
            name +
            ": must be a " +
            type +
            ", given " +
            value.type);
    }
}
/**
 * Enforce expectations about types of {@link Feature} inputs for Turf.
 * Internally this uses {@link geojsonType} to judge geometry types.
 *
 * @name featureOf
 * @param {Feature} feature a feature with an expected geometry type
 * @param {string} type expected GeoJSON type
 * @param {string} name name of calling function
 * @throws {Error} error if value is not the expected type.
 */
export function featureOf(feature, type, name) {
    if (!feature) {
        throw new Error("No feature passed");
    }
    if (!name) {
        throw new Error(".featureOf() requires a name");
    }
    if (!feature || feature.type !== "Feature" || !feature.geometry) {
        throw new Error("Invalid input to " + name + ", Feature with geometry required");
    }
    if (!feature.geometry || feature.geometry.type !== type) {
        throw new Error("Invalid input to " +
            name +
            ": must be a " +
            type +
            ", given " +
            feature.geometry.type);
    }
}
/**
 * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
 * Internally this uses {@link geojsonType} to judge geometry types.
 *
 * @name collectionOf
 * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
 * @param {string} type expected GeoJSON type
 * @param {string} name name of calling function
 * @throws {Error} if value is not the expected type.
 */
export function collectionOf(featureCollection, type, name) {
    if (!featureCollection) {
        throw new Error("No featureCollection passed");
    }
    if (!name) {
        throw new Error(".collectionOf() requires a name");
    }
    if (!featureCollection || featureCollection.type !== "FeatureCollection") {
        throw new Error("Invalid input to " + name + ", FeatureCollection required");
    }
    for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
        var feature = _a[_i];
        if (!feature || feature.type !== "Feature" || !feature.geometry) {
            throw new Error("Invalid input to " + name + ", Feature with geometry required");
        }
        if (!feature.geometry || feature.geometry.type !== type) {
            throw new Error("Invalid input to " +
                name +
                ": must be a " +
                type +
                ", given " +
                feature.geometry.type);
        }
    }
}
/**
 * Get Geometry from Feature or Geometry Object
 *
 * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
 * @returns {Geometry|null} GeoJSON Geometry Object
 * @throws {Error} if geojson is not a Feature or Geometry Object
 * @example
 * var point = {
 *   "type": "Feature",
 *   "properties": {},
 *   "geometry": {
 *     "type": "Point",
 *     "coordinates": [110, 40]
 *   }
 * }
 * var geom = turf.getGeom(point)
 * //={"type": "Point", "coordinates": [110, 40]}
 */
export function getGeom(geojson) {
    if (geojson.type === "Feature") {
        return geojson.geometry;
    }
    return geojson;
}
/**
 * Get GeoJSON object's type, Geometry type is prioritize.
 *
 * @param {GeoJSON} geojson GeoJSON object
 * @param {string} [name="geojson"] name of the variable to display in error message (unused)
 * @returns {string} GeoJSON type
 * @example
 * var point = {
 *   "type": "Feature",
 *   "properties": {},
 *   "geometry": {
 *     "type": "Point",
 *     "coordinates": [110, 40]
 *   }
 * }
 * var geom = turf.getType(point)
 * //="Point"
 */
export function getType(geojson, _name) {
    if (geojson.type === "FeatureCollection") {
        return "FeatureCollection";
    }
    if (geojson.type === "GeometryCollection") {
        return "GeometryCollection";
    }
    if (geojson.type === "Feature" && geojson.geometry !== null) {
        return geojson.geometry.type;
    }
    return geojson.type;
}