import * as turf from '@turf/turf'
const { VITE_APP_BASE, VITE_APP_ENV, VITE_APP_REGION_URL } = import.meta.env


// areaCode转换为目录结构, 返回数组,
export function areaCodeToArr(code) {
	const codeStr = code.toString()
	const provinceCode = codeStr.slice(0, 2) + '0000'
	const cityCode = codeStr.slice(0, 4) + '00'
	if (codeStr.slice(2, 4) === '00' && codeStr.slice(4, 6) === '00') {
		return [provinceCode]
	} else if (codeStr.slice(4, 6) === '00') {
		return [provinceCode, cityCode]
	}
	return [provinceCode, cityCode, codeStr]
}

// 根据区域code获取轮廓
export const getContourByCode = async areaCode => {
	const defaultDir = `${VITE_APP_REGION_URL}/100000/`
	const hierarchy = areaCodeToArr(areaCode.slice(0, 6))
	const jsonPathPre = hierarchy.slice(0, hierarchy.length - 1).join('/')
	const res = await fetch(`${defaultDir}${jsonPathPre}/index.json`)
	const parentGJson = await res.json()
	let features = parentGJson.features.find(item => item.properties.adcode === Number(hierarchy[hierarchy.length - 1]))
	return { type: 'FeatureCollection', features: [features] }
}