import_representatives.py

# coding: utf-8

import logging
import sys
from datetime import datetime

import django.dispatch
import ijson
import django
from django.apps import apps
from django.db import transaction
from django.utils import timezone

from representatives.models import (Country, Mandate, Email, Address, WebSite,
                                    Representative, Constituency, Phone, Group)

logger = logging.getLogger(__name__)

representative_pre_import = django.dispatch.Signal(
    providing_args=['representative_data'])


def _get_rep_district_name(json):
    num = json.get('num_circo')
    nom = json.get('nom_circo')
    ordinal = u'ère' if num == 1 else u'ème'
    return '%s (%d%s circonscription)' % (nom, num, ordinal)


def _get_rep_parl_groups(json):
    return [{
        'name': g['responsabilite']['organisme'],
        'role': g['responsabilite']['fonction'],
        'start': json['mandat_debut']
    } for g in json['groupes_parlementaires']]


def _get_rep_comittees(json):
    return [{
        'name': g['responsabilite']['organisme'],
        'role': g['responsabilite']['fonction'],
        'start': json['mandat_debut']
    } for g in json['responsabilites']
        if g['responsabilite']['organisme'].startswith('Commission')]


#
# Variant configuration
# - mail_domain is used to distinguish official vs personal emails
# - off_* fields are used for the official address of meps
# - mandates defines how mandates are created from the rep json
#
# Mandates are defined as follows
# - 'kind' indicates the group kind, a constant string
# - 'from', if present, must be a function that takes the rep json and returns
#   an array of dicts; one group will be created from each item in the dict.
#   When 'from' is not present, only one group wil be created using the rep
#   json (IOW, 'from' defaults to lambda repjson: [repjson])
# - 'name', 'abbr', 'role', 'start', 'end' are strings that are interpolated
#   against the rep json or items returned by 'from'.
# - 'name_path', 'abbr_path', etc. can replace 'name', 'abbr'... by specifying
#   a slash-separated dictionnary path where the value is to be found in the
#   rep json or item returned by 'from'
# - 'name_fn', 'abbr_fn', etc. can also replace 'name', 'abbr'... by a
#   function that takes the input item (rep json or item returned by 'from')
#   and returns the value
#
FranceDataVariants = {
    "an": {
        "constituency_name": u"Assemblée nationale",
        "remote_id_field": "id_an",
        "mail_domain": "@assemblee-nationale.fr",
        "off_city": "Paris",
        "off_street": u"Rue de l'Université",
        "off_number": "126",
        "off_code": "75355",
        "off_name": u"Assemblée nationale",
        "mandates": [
            {
                "kind": "group",
                "abbr": "%(groupe_sigle)s",
                "name_path": "groupe/organisme",
                "start": "%(mandat_debut)s"
            },
            {
                "kind": "party",
                "abbr": "%(parti_ratt_financier)s",
                "name": "%(parti_ratt_financier)s"
            },
            {
                "kind": "department",
                "abbr": "%(num_deptmt)s",
                "name": "%(nom_circo)s",
                "start": "%(mandat_debut)s"
            },
            {
                "kind": "district",
                "abbr": "%(num_deptmt)s-%(num_circo)d",
                "name_fn": _get_rep_district_name,
                "start": "%(mandat_debut)s"
            },
            {
                "kind": "parl-group",
                "from": _get_rep_parl_groups,
                "abbr": "%(name)s",
                "name": "%(name)s",
                "role": "%(role)s",
                "start": "%(start)s"
            },
            {
                "kind": "comittee",
                "from": _get_rep_comittees,
                "abbr": "%(name)s",
                "name": "%(name)s",
                "role": "%(role)s",
                "start": "%(start)s"
            }
        ]
    }
}


def _get_mdef_item(mdef, item, json, default=None):
    if item in mdef:
        return mdef[item] % json

    if '%s_path' % item in mdef:
        return _get_path(json, mdef['%s_path' % item])

    if '%s_fn' % item in mdef:
        return mdef['%s_fn' % item](json)

    return default


def _parse_date(date):
    return datetime.strptime(date, "%Y-%m-%d").date()


def _get_or_create_mandate(representative, group, constituency, role='',
                          begin_date=None, end_date=None):
    mandate, _ = Mandate.objects.get_or_create(
        representative=representative,
        group=group,
        constituency=constituency,
        role=role,
        begin_date=begin_date,
        end_date=end_date
    )

    if _:
        logger.debug('Created mandate %s', mandate.pk)

    return mandate


def _get_path(dict_, path):
    '''
    Get value at specific path in dictionary. Path is specified by slash-
    separated string, eg _get_path(foo, 'bar/baz') returns foo['bar']['baz']
    '''
    cur = dict_
    for part in path.split('/'):
        cur = cur[part]
    return cur


class GenericImporter(object):

    def pre_import(self):
        self.import_start_datetime = timezone.now()

    def touch_model(self, model, **data):
        '''
        This method create or look up a model with the given data
        it saves the given model if it exists, updating its
        updated field
        '''
        instance, created = model.objects.get_or_create(**data)

        if not created:
            if instance.updated < self.import_start_datetime:
                instance.save()     # Updates updated field

        return (instance, created)


class FranceDataImporter(GenericImporter):
    url = 'http://francedata.future/data/deputes.json'

    def parse_date(self, date):
        return _parse_date(date)

    def __init__(self, variant):
        self.france = Country.objects.get(name="France")
        self.variant = FranceDataVariants[variant]
        self.variant_constituency, _ = Constituency.objects.get_or_create(
            name=self.variant['constituency_name'],
            country=self.france)

    @transaction.atomic
    def manage_rep(self, rep_json):
        '''
        Import a rep as a representative from the json dict fetched from
        FranceData (which comes from nosdeputes.fr)
        '''
        remote_id = rep_json[self.variant['remote_id_field']]

        if not remote_id:
            logger.warning('Skipping MEP without UID %s %s',
                           rep_json['nom'],
                           rep_json[self.variant['remote_id_field']])
            return

        # Some versions of memopol will connect to this and skip inactive reps.
        responses = representative_pre_import.send(sender=self,
                representative_data=rep_json)

        for receiver, response in responses:
            if response is False:
                logger.debug(
                    'Skipping MEP %s', rep_json['nom'])
                return

        try:
            representative = Representative.objects.get(remote_id=remote_id)
        except Representative.DoesNotExist:
            representative = Representative(remote_id=remote_id)

        # Save representative attributes
        self.import_representative_details(representative, rep_json)

        representative.save()

        self.add_mandates(representative, rep_json)

        self.add_contacts(representative, rep_json)

        logger.debug('Imported MEP %s', unicode(representative))

        return representative

    def import_representative_details(self, representative, rep_json):
        representative.active = True

        if rep_json.get("date_naissance"):
            representative.birth_date = _parse_date(rep_json["date_naissance"])
        if rep_json.get("lieu_naissance"):
            representative.birth_place = rep_json["lieu_naissance"]

        representative.photo = rep_json['photo_url']
        representative.full_name = rep_json["nom"]

        gender_convertion_dict = {
            u"F": 1,
            u"H": 2
        }
        if 'sexe' in rep_json:
            representative.gender = gender_convertion_dict.get(rep_json[
                                                               'sexe'], 0)
        else:
            representative.gender = 0

        representative.slug = rep_json['slug']

    def add_mandates(self, representative, rep_json):
        '''
        Create mandates from rep data based on variant configuration
        '''

        for mdef in self.variant['mandates']:
            if 'from' in mdef:
                elems = mdef['from'](rep_json)
            else:
                elems = [rep_json]

            for elem in elems:
                name = _get_mdef_item(mdef, 'name', elem, '')
                abbr = _get_mdef_item(mdef, 'abbr', elem, '')

                group, _ = self.touch_model(model=Group,
                                            abbreviation=abbr,
                                            kind=mdef['kind'],
                                            name=name)

                role = _get_mdef_item(mdef, 'role', elem, 'membre')
                start = _get_mdef_item(mdef, 'start', elem, None)
                if start is not None:
                    start = _parse_date(start)
                end = _get_mdef_item(mdef, 'end', elem, None)
                if end is not None:
                    end = _parse_date(end)

                self.rep_cache['groups'].append(
                    _get_or_create_mandate(representative, group,
                                          self.variant_constituency, role,
                                          start, end)
                )

                logger.debug(
                    '%s => %s: %s of "%s" (%s) %s-%s' % (rep_json['slug'],
                    mdef['kind'], role, name, abbr, start, end))

    def add_contacts(self, representative, rep_json):
        # Websites
        websites = rep_json.get('sites_web', [])
        for site in websites:
            if not site['site'].startswith('http://twitter.com/'):
                self.touch_model(model=WebSite,
                                 url=site['site'],
                                 representative=representative
                                 )

        # Twitter
        if rep_json.get('twitter'):
            tid = rep_json.get('twitter')
            self.touch_model(model=WebSite,
                             representative=representative,
                             kind='twitter',
                             url='http://twitter.com/%s' % tid
                             )

        # E-mails
        emails = rep_json.get('emails', [])
        for email in emails:
            mail = email['email']
            self.touch_model(
                model=Email,
                representative=representative,
                kind=('official' if mail.endswith(self.variant['mail_domain'])
                    else 'other'),
                email=mail)

        # Official address
        off_name = self.variant['off_name']
        official_addr, _ = self.touch_model(model=Address,
                                            representative=representative,
                                            country=self.france,
                                            city=self.variant['off_city'],
                                            street=self.variant['off_street'],
                                            number=self.variant['off_number'],
                                            postcode=self.variant['off_code'],
                                            kind='official',
                                            name=off_name
                                            )

        # Addresses & phone numbers
        addresses = rep_json.get('adresses', [])
        for item in addresses:
            addr = None
            if 'geo' in item:
                props = item['geo'].get('properties', {})
                name = ''

                if item['adresse'].lower().startswith('permanence'):
                    name = 'Permanence'

                addr, _ = self.touch_model(model=Address,
                                           representative=representative,
                                           country=self.france,
                                           city=props.get('city', ''),
                                           street=props.get('street', ''),
                                           number=props.get('housenumber', ''),
                                           postcode=props.get('postcode', ''),
                                           kind='',
                                           name=name
                                           )
            elif item['adresse'].lower().startswith(off_name.lower()):
                addr = official_addr

            if 'tel' in item:
                self.touch_model(model=Phone, address=addr,
                                 representative=representative,
                                 kind='', number=item['tel']
                                 )


def main(stream=None):
    if not apps.ready:
        django.setup()

    importer = FranceDataImporter('an')
    GenericImporter.pre_import(importer)

    for data in ijson.items(stream or sys.stdin, ''):
        for rep in data:
            importer.rep_cache = dict(groups=[], parties=[], departments=[],
                                      districts=[])
            importer.manage_rep(rep)