from osm_parser import get_default_parser


class Node:
    def __init__(self, id, lat, lng):
        self.id = id
        self.lat = float(lat)
        self.lng = float(lng)

    def coord_tuple(self):
        return self.lat, self.lng


parser = None  # Have a global reusable parser object


def extract_osm_nodes(f_name):
    global parser
    parser = get_default_parser(f_name)
    nodes = dict()

    for node in parser.iter_nodes():
        nodes[node['id']] = Node(node['id'], node['lat'], node['lon'])

    return nodes


def select_nodes_in_rectangle(nodes, min_lat, max_lat, min_long, max_long):
    return [node for node in nodes.values()
            if min_lat <= node.lat <= max_lat
            and min_long <= node.lng <= max_long]