import datetime

from django.test import TestCase
from django.db import models

from lostplaces_app.models import Place
from lostplaces_app.tests.models import TestSubmittable
from lostplaces_app.tests import mock_user
from lostplaces_app.tests.models import TestModel

from taggit.managers import TaggableManager

def mock_place():
    place = Place.objects.create(
        name='Im a place',
        submitted_when=datetime.datetime.now(),
        submitted_by=mock_user().explorer,
        location='Testtown',
        latitude=50.5,
        longitude=7.0,
        description='This is just a test, do not worry'
    )
    place.tags.add('I a tag', 'testlocation')

    return place

class PlaceTestCase(TestSubmittable, TestCase):
    model_name = 'Place'
    related_name = 'places'
    nullable = True

    def setUp(self):
        self.place = mock_place()
        self.object = self.place

    def test_name_field(self):
        self._test_char_field(
            field_name='name', 
            min_length=10,
            max_length=100
        )

    def test_location(self):
        self._test_char_field(
            field_name='location',
            min_length=10,
            max_length=100
        )

    def test_latitude(self):
        self._test_float_field(
            field_name='latitude', 
            min_value=-90, 
            max_value=90
        )

    def test_longitude(self):
        self._test_float_field(
            field_name='longitude',
            min_value=-180, 
            max_value=180
        )

    def test_decsription(self):
        self._test_field('description', models.TextField)

    def test_tags(self):
        self._test_field('tags', TaggableManager)

    def test_average_latlon(self):
        '''
        Tests the average latitude/longitude calculation of a list
        of 10 places
        '''
        place_list = []
        for i in range(10):
            place = mock_place()
            place.latitude = i+1
            place.longitude = i+10
            place_list.append(place)

        avg_latlon = Place.average_latlon(place_list)
        self.assertEqual(avg_latlon[0], 5.5,
            msg='%s: average latitude missmatch' % (
                self.model_name
            )
        )
        self.assertEqual(avg_latlon[1], 14.5,
            msg='%s: average longitude missmatch' % (
                self.model_name
            )
        )

    def test_average_latlon_one_place(self):
        '''
        Tests the average latitude/longitude calculation of a list
        of one place
        '''
        place = mock_place()
        avg_latlon = Place.average_latlon([place])
        self.assertEqual(avg_latlon[0], place.latitude,
            msg='%s:(one place) average latitude missmatch' % (
                self.model_name
            )
        )
        self.assertEqual(avg_latlon[1], place.longitude,
            msg='%s: (one place) average longitude missmatch' % (
                self.model_name
            )
        )

    def test_average_latlon_no_places(self):
        '''
        Tests the average latitude/longitude calculation of 
        an empty list
        '''
        avg_latlon = Place.average_latlon([])
        self.assertEqual(avg_latlon[0], 0,
            msg='%s: (no places) average latitude missmatch' % (
                self.model_name
            )
        )
        self.assertEqual(avg_latlon[1], 0,
            msg='%s: a(no places) verage longitude missmatch' % (
                self.model_name
            )
        )

    def test_str(self):
        place = mock_place()
        self.assertEqual(str(place), place.name,
            msg='%s __str__ should return the name' % (
                self.model_name
            )

        )