import json

import pyproj
from shapely.geometry import LineString
from shapely.ops import transform
from functools import partial

from analysis.util import json_path


def distance(track):
	project = partial(
		pyproj.transform,
		pyproj.Proj(init='EPSG:4326'),
		pyproj.Proj(init='EPSG:32633'))
	return transform(project, track).length


def json_to_track(geojson, path):
		return LineString(json_path(json.loads(geojson), path))


def calc_distance(geojson: str, path="coordinates"):
	track = json_to_track(geojson, path)
	return distance(track)