/* eslint-disable @typescript-eslint/no-unused-vars */
import { Linear, Point } from '@antv/scale';
/**
 * Apples parallel coordinate transform.
 * @param params [x0, x1, y0, y1]
 * @param x x of the the bounding box of coordinate
 * @param y y of the the bounding box of coordinate
 * @param width width of the the bounding box of coordinate
 * @param height height of the the bounding box of coordinate
 * @returns transformer
 */
export var parallel = function (params, x, y, width, height) {
    var _a = params, x0 = _a[0], x1 = _a[1], y0 = _a[2], y1 = _a[3];
    var sy = new Linear({
        range: [y0, y1],
    });
    return {
        transform: function (vector) {
            var v = [];
            var len = vector.length;
            var sx = new Point({
                domain: new Array(len).fill(0).map(function (_, i) { return i; }),
                range: [x0, x1],
            });
            for (var i = 0; i < len; i++) {
                var e = vector[i];
                var x_1 = sx.map(i);
                var y_1 = sy.map(e);
                v.push(x_1, y_1);
            }
            return v;
        },
        untransform: function (vector) {
            var v = [];
            for (var i = 0; i < vector.length; i += 2) {
                var y_2 = vector[i + 1];
                v.push(sy.invert(y_2));
            }
            return v;
        },
    };
};
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