import type { Placement, RelativePlacement } from '../types';
import { isBetween } from './math';

/**
 * <zh/> 解析位置
 *
 * <en/> Parse position
 * @param placement - <zh/> 位置 | <en/> placement
 * @returns <zh/> 相对位置 | <en/> relative placement
 */
export function parsePlacement(placement: Placement): RelativePlacement {
  if (Array.isArray(placement)) {
    return isBetween(placement[0], 0, 1) && isBetween(placement[1], 0, 1) ? placement : [0.5, 0.5];
  }
  const direction = placement.split('-');
  const x = direction.includes('left') ? 0 : direction.includes('right') ? 1 : 0.5;
  const y = direction.includes('top') ? 0 : direction.includes('bottom') ? 1 : 0.5;
  return [x, y];
}