"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var clean_coords_1 = __importDefault(require("@turf/clean-coords"));
var line_segment_1 = __importDefault(require("@turf/line-segment"));
var rhumb_bearing_1 = __importDefault(require("@turf/rhumb-bearing"));
var helpers_1 = require("@turf/helpers");
/**
 * Boolean-Parallel returns True if each segment of `line1` is parallel to the correspondent segment of `line2`
 *
 * @name booleanParallel
 * @param {Geometry|Feature<LineString>} line1 GeoJSON Feature or Geometry
 * @param {Geometry|Feature<LineString>} line2 GeoJSON Feature or Geometry
 * @returns {boolean} true/false if the lines are parallel
 * @example
 * var line1 = turf.lineString([[0, 0], [0, 1]]);
 * var line2 = turf.lineString([[1, 0], [1, 1]]);
 *
 * turf.booleanParallel(line1, line2);
 * //=true
 */
function booleanParallel(line1, line2) {
    // validation
    if (!line1)
        throw new Error("line1 is required");
    if (!line2)
        throw new Error("line2 is required");
    var type1 = getType(line1, "line1");
    if (type1 !== "LineString")
        throw new Error("line1 must be a LineString");
    var type2 = getType(line2, "line2");
    if (type2 !== "LineString")
        throw new Error("line2 must be a LineString");
    var segments1 = line_segment_1.default(clean_coords_1.default(line1)).features;
    var segments2 = line_segment_1.default(clean_coords_1.default(line2)).features;
    for (var i = 0; i < segments1.length; i++) {
        var segment1 = segments1[i].geometry.coordinates;
        if (!segments2[i])
            break;
        var segment2 = segments2[i].geometry.coordinates;
        if (!isParallel(segment1, segment2))
            return false;
    }
    return true;
}
/**
 * Compares slopes and return result
 *
 * @private
 * @param {Geometry|Feature<LineString>} segment1 Geometry or Feature
 * @param {Geometry|Feature<LineString>} segment2 Geometry or Feature
 * @returns {boolean} if slopes are equal
 */
function isParallel(segment1, segment2) {
    var slope1 = helpers_1.bearingToAzimuth(rhumb_bearing_1.default(segment1[0], segment1[1]));
    var slope2 = helpers_1.bearingToAzimuth(rhumb_bearing_1.default(segment2[0], segment2[1]));
    return slope1 === slope2;
}
/**
 * Returns Feature's type
 *
 * @private
 * @param {Geometry|Feature<any>} geojson Geometry or Feature
 * @param {string} name of the variable
 * @returns {string} Feature's type
 */
function getType(geojson, name) {
    if (geojson.geometry && geojson.geometry.type)
        return geojson.geometry.type;
    if (geojson.type)
        return geojson.type; // if GeoJSON geometry
    throw new Error("Invalid GeoJSON object for " + name);
}
exports.default = booleanParallel;