# -*- coding: utf-8 -*-

# Copyright(C) 2013      dud
#
# This file is part of weboob.
#
# weboob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# weboob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with weboob. If not, see <http://www.gnu.org/licenses/>.


from weboob.tools.backend import BaseBackend
from weboob.capabilities.gauge import ICapGauge, GaugeSensor, Gauge, SensorNotFound

from .browser import VelibBrowser

import re

__all__ = ['VelibBackend']


class VelibBackend(BaseBackend, ICapGauge):
    NAME = 'velib'
    DESCRIPTION = u'get Vélib\' information'
    MAINTAINER = u'Herve Werner'
    EMAIL = 'dud225@hotmail.com'
    VERSION = '0.g'
    LICENSE = 'AGPLv3'

    BROWSER = VelibBrowser
    STORAGE = {'boards': {}}

    def iter_gauges(self, pattern=None):
        if pattern is None:
            for gauge in self.browser.get_station_list():
                yield gauge
        else:
            lowpattern = pattern.lower()
            for gauge in self.browser.get_station_list():
                if lowpattern in gauge.name.lower() or lowpattern in gauge.city.lower():
                    yield gauge

    def iter_sensors(self, gauge, pattern=None):
        if not isinstance(gauge, Gauge):
            gauge = self._get_gauge_by_id(gauge)
            if gauge is None:
                raise SensorNotFound()

        gauge.sensors = self.browser.get_station_infos(gauge)
        if pattern is None:
            for sensor in gauge.sensors:
                yield sensor
        else:
            lowpattern = pattern.lower()
            for sensor in gauge.sensors:
                if lowpattern in sensor.name.lower():
                    yield sensor

    def get_last_measure(self, sensor):
        if not isinstance(sensor, GaugeSensor):
            sensor = self._get_sensor_by_id(sensor)
        if sensor is None:
            raise SensorNotFound()
        return sensor.lastvalue

    def _get_gauge_by_id(self, id):
        for gauge in self.browser.get_station_list():
            if id == gauge.id:
                return gauge
        return None

    def _get_sensor_by_id(self, id):
        reSensorId = re.search('(\d+)-((bikes|attach|status))', id, re.IGNORECASE)
        if reSensorId:
            gauge = reSensorId.group(1)
            pattern = reSensorId.group(2)
            sensor_generator = self.iter_sensors(gauge, pattern)
            if sensor_generator:
                return next(sensor_generator)
            else:
                return None
        else:
            return None