"""
 Photon (Map)

 @website     https://photon.komoot.de
 @provide-api yes (https://photon.komoot.de/)

 @using-api   yes
 @results     JSON
 @stable      yes
 @parse       url, title
"""

from urllib import urlencode
from json import loads
from searx.utils import searx_useragent

# engine dependent config
categories = ['map']
paging = False
language_support = True
number_of_results = 10

# search-url
base_url = 'https://photon.komoot.de/'
search_string = 'api/?{query}&limit={limit}'
result_base_url = 'https://openstreetmap.org/{osm_type}/{osm_id}'

# list of supported languages
allowed_languages = ['de', 'en', 'fr', 'it']


# do search-request
def request(query, params):
    params['url'] = base_url +\
        search_string.format(query=urlencode({'q': query}),
                             limit=number_of_results)

    if params['language'] != 'all':
        language = params['language'].split('_')[0]
        if language in allowed_languages:
            params['url'] = params['url'] + "&lang=" + language

    # using searx User-Agent
    params['headers']['User-Agent'] = searx_useragent()

    return params


# get response from search-request
def response(resp):
    results = []
    json = loads(resp.text)

    # parse results
    for r in json.get('features', {}):

        properties = r.get('properties')

        if not properties:
            continue

        # get title
        title = properties.get('name')

        # get osm-type
        if properties.get('osm_type') == 'N':
            osm_type = 'node'
        elif properties.get('osm_type') == 'W':
            osm_type = 'way'
        elif properties.get('osm_type') == 'R':
            osm_type = 'relation'
        else:
            # continue if invalide osm-type
            continue

        url = result_base_url.format(osm_type=osm_type,
                                     osm_id=properties.get('osm_id'))

        osm = {'type': osm_type,
               'id': properties.get('osm_id')}

        geojson = r.get('geometry')

        if properties.get('extent'):
            boundingbox = [properties.get('extent')[3],
                           properties.get('extent')[1],
                           properties.get('extent')[0],
                           properties.get('extent')[2]]
        else:
            # TODO: better boundingbox calculation
            boundingbox = [geojson['coordinates'][1],
                           geojson['coordinates'][1],
                           geojson['coordinates'][0],
                           geojson['coordinates'][0]]

        # address calculation
        address = {}

        # get name
        if properties.get('osm_key') == 'amenity' or\
           properties.get('osm_key') == 'shop' or\
           properties.get('osm_key') == 'tourism' or\
           properties.get('osm_key') == 'leisure':
            address = {'name': properties.get('name')}

        # add rest of adressdata, if something is already found
        if address.get('name'):
            address.update({'house_number': properties.get('housenumber'),
                           'road': properties.get('street'),
                           'locality': properties.get('city',
                                       properties.get('town',           # noqa
                                       properties.get('village'))),     # noqa
                           'postcode': properties.get('postcode'),
                           'country': properties.get('country')})
        else:
            address = None

        # append result
        results.append({'template': 'map.html',
                        'title': title,
                        'content': '',
                        'longitude': geojson['coordinates'][0],
                        'latitude': geojson['coordinates'][1],
                        'boundingbox': boundingbox,
                        'geojson': geojson,
                        'address': address,
                        'osm': osm,
                        'url': url})

    # return results
    return results
