from flask_restful import Resource, reqparse
from app.main.service.meters_service import (
    get_meters, create_or_update_meters, delete_meter)
from app.main.common.decorators import standardize_api_response
from app.main.common.utils import is_a_valid_object_id


def post_put_parser():
    """Request parser for HTTP POST or PUT.
    :returns: flask.ext.restful.reqparse.RequestParser object
    """

    parse = reqparse.RequestParser()
    parse.add_argument(
        'serialNumber', type=str, location='json', required=True)
    parse.add_argument(
        'name', type=str, location='json', required=True)
    parse.add_argument(
        'brand', type=str, location='json', required=True)
    parse.add_argument(
        'model', type=str, location='json', required=True)
    parse.add_argument(
        'phases', type=int, location='json')
    parse.add_argument(
        'active', type=bool, location='json')
    parse.add_argument(
        'address', type=str, location='json')
    parse.add_argument(
        'gpsLat', type=float, location='json')
    parse.add_argument(
        'gpsLong', type=float, location='json')
    parse.add_argument(
        'installedDate', type=str, location='json')

    return parse


class MetersApi(Resource):

    @standardize_api_response
    def get(self):
        return get_meters()

    @standardize_api_response
    def post(self):

        parse = post_put_parser()
        args = parse.parse_args()

        serialNumber = args['serialNumber']
        name = args['name']
        brand = args['brand']
        model = args['model']
        phases = args['phases']
        active = args['active']
        address = args['address']
        gpsLat = args['gpsLat']
        gpsLong = args['gpsLong']
        installedDate = args['installedDate']

        return create_or_update_meters(
            serialNumber, name, brand, model, phases,
            active, address, gpsLat, gpsLong, installedDate)


class MeterApi(Resource):

    @standardize_api_response
    def put(self):
        parse = post_put_parser()
        args = parse.parse_args()

        serialNumber = args['serialNumber']
        name = args['name']
        brand = args['brand']
        model = args['model']
        phases = args['phases']
        active = args['active']
        address = args['address']
        gpsLat = args['gpsLat']
        gpsLong = args['gpsLong']
        installedDate = args['installedDate']

        return create_or_update_meters(
            serialNumber, name, brand, model, phases,
            active, address, gpsLat, gpsLong, installedDate)

    @standardize_api_response
    def delete(self, meter_id):

        if not is_a_valid_object_id(meter_id):
            return {'error': 'Invalid meter id.'}

        return delete_meter(meter_id)