import re

from ogn.parser.utils import FPM_TO_MS
from ogn.parser.pattern import PATTERN_FANET_POSITION_COMMENT

from .base import BaseParser


class FanetParser(BaseParser):
    def __init__(self):
        self.beacon_type = 'fanet'
        self.position_parser = re.compile(PATTERN_FANET_POSITION_COMMENT)

    def parse_position(self, aprs_comment):
        ac_match = self.position_parser.match(aprs_comment)
        return {'address_type': int(ac_match.group('details'), 16) & 0b00000011 if ac_match.group('details') else None,
                'aircraft_type': (int(ac_match.group('details'), 16) & 0b01111100) >> 2 if ac_match.group('details') else None,
                'stealth': (int(ac_match.group('details'), 16) & 0b10000000) >> 7 == 1 if ac_match.group('details') else None,
                'address': ac_match.group('address') if ac_match.group('address') else None,
                'climb_rate': int(ac_match.group('climb_rate')) * FPM_TO_MS if ac_match.group('climb_rate') else None}