"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getLabelAttributes = getLabelAttributes;
/**
 * Return text anchor of labels.
 * @param angle The axis angle (in rad) with clock direction and 0 at the top
 */
function getTextAnchor(angle) {
  if (angle < 20) {
    return 'start';
  }
  if (angle < 90 - 10) {
    return 'end';
  }
  if (angle < 270 - 10) {
    return 'start';
  }
  if (angle < 360 - 20) {
    return 'end';
  }
  return 'start';
}
function getDominantBaseline(angle) {
  if (angle < 160) {
    return 'auto';
  }
  if (angle < 360 - 20) {
    return 'hanging';
  }
  return 'auto';
}
const LABEL_MARGIN = 2;
function getLabelAttributes(params) {
  const {
    x,
    y,
    angle
  } = params;
  if (params.labelOrientation === 'horizontal') {
    const textAnchor = typeof params.textAnchor === 'function' ? params.textAnchor(angle) : params.textAnchor ?? getTextAnchor(angle);
    const dominantBaseline = typeof params.dominantBaseline === 'function' ? params.dominantBaseline(angle) : params.dominantBaseline ?? getDominantBaseline(angle);
    const marginX = textAnchor === 'start' ? LABEL_MARGIN : -LABEL_MARGIN;
    const marginY = dominantBaseline === 'auto' ? -LABEL_MARGIN : LABEL_MARGIN;
    return {
      x: x + marginX,
      y: y + marginY,
      textAnchor,
      dominantBaseline
    };
  }

  // orientation='rotated'

  const textAnchor = typeof params.textAnchor === 'function' ? params.textAnchor(angle) : params.textAnchor ?? 'start';
  const dominantBaseline = typeof params.dominantBaseline === 'function' ? params.dominantBaseline(angle) : params.dominantBaseline ?? 'auto';
  return {
    x,
    y,
    textAnchor,
    dominantBaseline,
    transform: `rotate(${angle}, ${x}, ${y})`
  };
}