import * as turf from '@turf/turf'

/**
 * 线缩放通用方法
 * @param data 数据源 格式 [[lng, lat], [lng, lat], [lng, lat]]
 * @param multiple 缩放倍数
 */
export const lineTransformScale = (data, multiple = 3) => {
	const line = turf.lineString(data)
	const scaledLine = turf.transformScale(line, multiple)

	return scaledLine.geometry.coordinates
}

/**
 * 盒子缩放通用方法
 * @param data 数据源 格式 [[lng, lat], [lng, lat], [lng, lat]]
 * @param multiple 缩放倍数
 */
export const boxTransformScale = (data, multiple = 3) => {
	const line = turf.lineString(data)
	const bbox = turf.bbox(line)
	const bboxPolygon = turf.bboxPolygon(bbox)
	const scaledPolygon = turf.transformScale(bboxPolygon, multiple)

	return turf.bbox(scaledPolygon)
}

export const polygonTransformScale = (data, multiple = 3) => {
	const line = turf.lineString(data)
	const bbox = turf.bbox(line)
	const bboxPolygon = turf.bboxPolygon(bbox)
	const scaledPolygon = turf.transformScale(bboxPolygon, multiple)

	return scaledPolygon
}