#!/usr/bin/env python
# create spec for bounding boxes used in IIAB vector map subsets

from geojson import Feature, Point, FeatureCollection, Polygon
import geojson
import json
import os


def main():
   features = []
   input_json = "{{ iiab_dir }}" + '/regions.json'
   with open(input_json,'r') as regions:
      reg_str = regions.read()
      info = json.loads(reg_str)
   #print(json.dumps(info,indent=2))
   for root in info.keys():
      for region in info[root]:
        west = float(info[root][region]['west'])
        south = float(info[root][region]['south'])
        east = float(info[root][region]['east'])
        north = float(info[root][region]['north'])
        poly = Polygon([[[west,south],[east,south],[east,north],[west,north],[west,south]]])
        features.append(Feature(geometry=poly,properties={"name":region}))

      collection = FeatureCollection(features)
   bboxes = "{{ doc_root }}/common/assets/bboxes.geojson"
   with open(bboxes,"w") as bounding_geojson:
      outstr = geojson.dumps(collection, indent=2)
      bounding_geojson.write(outstr)

if __name__ == '__main__':
   main()