#!/usr/bin/env python
# Scan the osm-vector directory, update the osm-vector-idx.json, add menu-defs

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

IIAB_PATH='/etc/iiab'
if not IIAB_PATH in sys.path:
    sys.path.append(IIAB_PATH)
from iiab_env import get_iiab_env

doc_root = get_iiab_env('WWWROOT')
menuDefs = doc_root + "/js-menu/menu-files/menu-defs/"
map_catalog = {}
map_menu_defs ={}
def main():
   global map_menu_defs
   get_map_catalog()
   map_menu_defs = get_menu_def_names()

def get_map_catalog():
   global map_catalog
   #input_json = "{{ iiab_dir }}" + '/regions.json'
   input_json = "/etc/iiab" + '/regions.json'
   with open(input_json,'r') as regions:
      reg_str = regions.read()
      map_catalog = json.loads(reg_str)
   #print(json.dumps(map_catalog,indent=2))

def get_menu_def_names(intended_use='map'):
   menu_def_dict = {}
   os.chdir(menuDefs)
   for filename in os.listdir('.'):
      if fnmatch.fnmatch(filename, '*.json'):
         try:
            with open(filename,'r') as json_file:
                readstr = json_file.read()
                data = json.loads(readstr)
         except:
            print("failed to parse %s"%filename)
            print(readstr)
         if data.get('intended_use','') != intended_use:
            continue
         mapname = data.get('name','')
         if mapname != '':
            menu_def_dict[data['map_name']] = menuDefs + filename
   return menu_def_dict

def human_readable(num):
    # return 3 significant digits and unit specifier
    num = float(num)
    units = [ '','K','M','G']
    for i in range(4):
        if num<10.0:
            return "%.2f%s"%(num,units[i])
        if num<100.0:
            return "%.1f%s"%(num,units[i])
        if num < 1000.0:
            return "%.0f%s"%(num,units[i])
        num /= 1000.0

if __name__ == '__main__':
   main()