import os
from unittest import mock, skipUnless

from django.conf import settings
from django.contrib.gis.geoip2 import HAS_GEOIP2
from django.contrib.gis.geos import GEOSGeometry
from django.test import SimpleTestCase

if HAS_GEOIP2:
    from django.contrib.gis.geoip2 import GeoIP2, GeoIP2Exception


# Note: Requires both the GeoIP country and city datasets.
# The GEOIP_DATA path should be the only setting set (the directory
# should contain links or the actual database files 'GeoLite2-City.mmdb' and
# 'GeoLite2-City.mmdb'.
@skipUnless(
    HAS_GEOIP2 and getattr(settings, "GEOIP_PATH", None),
    "GeoIP is required along with the GEOIP_PATH setting."
)
class GeoIPTest(SimpleTestCase):
    addr = '128.249.1.1'
    fqdn = 'tmc.edu'

    def test01_init(self):
        "GeoIP initialization."
        g1 = GeoIP2()  # Everything inferred from GeoIP path
        path = settings.GEOIP_PATH
        g2 = GeoIP2(path, 0)  # Passing in data path explicitly.
        g3 = GeoIP2.open(path, 0)  # MaxMind Python API syntax.

        for g in (g1, g2, g3):
            self.assertTrue(g._country)
            self.assertTrue(g._city)

        # Only passing in the location of one database.
        city = os.path.join(path, 'GeoLite2-City.mmdb')
        cntry = os.path.join(path, 'GeoLite2-Country.mmdb')
        g4 = GeoIP2(city, country='')
        self.assertIsNone(g4._country)
        g5 = GeoIP2(cntry, city='')
        self.assertIsNone(g5._city)

        # Improper parameters.
        bad_params = (23, 'foo', 15.23)
        for bad in bad_params:
            with self.assertRaises(GeoIP2Exception):
                GeoIP2(cache=bad)
            if isinstance(bad, str):
                e = GeoIP2Exception
            else:
                e = TypeError
            with self.assertRaises(e):
                GeoIP2(bad, 0)

    def test_no_database_file(self):
        invalid_path = os.path.join(os.path.dirname(__file__), 'data')
        msg = 'Could not load a database from %s.' % invalid_path
        with self.assertRaisesMessage(GeoIP2Exception, msg):
            GeoIP2(invalid_path)

    def test02_bad_query(self):
        "GeoIP query parameter checking."
        cntry_g = GeoIP2(city='<foo>')
        # No city database available, these calls should fail.
        with self.assertRaises(GeoIP2Exception):
            cntry_g.city('tmc.edu')
        with self.assertRaises(GeoIP2Exception):
            cntry_g.coords('tmc.edu')

        # Non-string query should raise TypeError
        with self.assertRaises(TypeError):
            cntry_g.country_code(17)
        with self.assertRaises(TypeError):
            cntry_g.country_name(GeoIP2)

    @mock.patch('socket.gethostbyname')
    def test03_country(self, gethostbyname):
        "GeoIP country querying methods."
        gethostbyname.return_value = '128.249.1.1'
        g = GeoIP2(city='<foo>')

        for query in (self.fqdn, self.addr):
            self.assertEqual(
                'US',
                g.country_code(query),
                'Failed for func country_code and query %s' % query
            )
            self.assertEqual(
                'United States',
                g.country_name(query),
                'Failed for func country_name and query %s' % query
            )
            self.assertEqual(
                {'country_code': 'US', 'country_name': 'United States'},
                g.country(query)
            )

    @mock.patch('socket.gethostbyname')
    def test04_city(self, gethostbyname):
        "GeoIP city querying methods."
        gethostbyname.return_value = '128.249.1.1'
        g = GeoIP2(country='<foo>')

        for query in (self.fqdn, self.addr):
            # Country queries should still work.
            self.assertEqual(
                'US',
                g.country_code(query),
                'Failed for func country_code and query %s' % query
            )
            self.assertEqual(
                'United States',
                g.country_name(query),
                'Failed for func country_name and query %s' % query
            )
            self.assertEqual(
                {'country_code': 'US', 'country_name': 'United States'},
                g.country(query)
            )

            # City information dictionary.
            d = g.city(query)
            self.assertEqual('NA', d['continent_code'])
            self.assertEqual('North America', d['continent_name'])
            self.assertEqual('US', d['country_code'])
            self.assertEqual('Houston', d['city'])
            self.assertEqual('TX', d['region'])
            self.assertEqual('America/Chicago', d['time_zone'])
            geom = g.geos(query)
            self.assertIsInstance(geom, GEOSGeometry)

            for e1, e2 in (geom.tuple, g.coords(query), g.lon_lat(query), g.lat_lon(query)):
                self.assertIsInstance(e1, float)
                self.assertIsInstance(e2, float)

    def test06_ipv6_query(self):
        "GeoIP can lookup IPv6 addresses."
        g = GeoIP2()
        d = g.city('2002:81ed:c9a5::81ed:c9a5')  # IPv6 address for www.nhm.ku.edu
        self.assertEqual('US', d['country_code'])
        self.assertEqual('Lawrence', d['city'])
        self.assertEqual('KS', d['region'])

    def test_repr(self):
        path = settings.GEOIP_PATH
        g = GeoIP2(path=path)
        meta = g._reader.metadata()
        version = '%s.%s' % (meta.binary_format_major_version, meta.binary_format_minor_version)
        country_path = g._country_file
        city_path = g._city_file
        expected = '<GeoIP2 [v%(version)s] _country_file="%(country)s", _city_file="%(city)s">' % {
            'version': version,
            'country': country_path,
            'city': city_path,
        }
        self.assertEqual(repr(g), expected)

    @mock.patch('socket.gethostbyname', return_value='expected')
    def test_check_query(self, gethostbyname):
        g = GeoIP2()
        self.assertEqual(g._check_query('127.0.0.1'), '127.0.0.1')
        self.assertEqual(g._check_query('2002:81ed:c9a5::81ed:c9a5'), '2002:81ed:c9a5::81ed:c9a5')
        self.assertEqual(g._check_query('invalid-ip-address'), 'expected')