from __future__ import print_function
from __future__ import division
from __future__ import absolute_import
import datetime

from flask import Flask
from flask_testing import TestCase as FlaskTestCase
from flask_babel import Babel
from jinja2 import Environment
import mock
import html5lib
from pytz import timezone, utc

from .. import filters

env = Environment()
filters.init_filters(env)


def en_locale():
  return 'en'


def user_tz():
  # This one is GMT+8 and has no DST (tests should pass any time in year)
  return 'Asia/Hong_Kong'

USER_TZ = timezone(user_tz())


class TestFilters(FlaskTestCase):

  def create_app(self):
    app = Flask(__name__)
    babel = Babel(app, default_locale='fr', default_timezone=USER_TZ)
    babel.localeselector(en_locale)
    babel.timezoneselector(user_tz)
    return app

  def test_labelize(self):
    labelize = filters.labelize
    self.assertEquals(u'Test Case', labelize(u'test_case'))

  def test_filesize(self):
    filesize = filters.filesize
    self.assertEquals("100&nbsp;B", str(filesize('100')))
    self.assertEquals("100&nbsp;B", str(filesize(100)))
    self.assertEquals("1.0&nbsp;kB", str(filesize(1000)))
    self.assertEquals("1.1&nbsp;kB", str(filesize(1100)))
    self.assertEquals("10&nbsp;kB", str(filesize(10000)))
    self.assertEquals("1.1&nbsp;MB", str(filesize(1100100)))
    self.assertEquals("10&nbsp;MB", str(filesize(10000000)))
    self.assertEquals("1.1&nbsp;GB", str(filesize(1100100000)))
    self.assertEquals("100&nbsp;GB", str(filesize(100000000000)))

  def test_roughsize(self):
    roughsize = filters.roughsize
    self.assertEquals(u'6', roughsize(6))
    self.assertEquals(u'15', roughsize(15))
    self.assertEquals(u'130+', roughsize(134))
    self.assertEquals(u'10+', roughsize(15, above=10))
    self.assertEquals(u'55+', roughsize(57, mod=5))

  def test_date_age(self):
    date_age = filters.date_age
    now = datetime.datetime(2012, 6, 10, 10, 10, 10, tzinfo=utc)

    self.assertEquals("", date_age(None))
    dt = datetime.datetime(2012, 6, 10, 10, 10, 0, tzinfo=utc)
    self.assertEquals("2012-06-10 18:10 (1 minute ago)", date_age(dt, now))

    dt = datetime.datetime(2012, 6, 10, 10, 8, 10, tzinfo=utc)
    self.assertEquals("2012-06-10 18:08 (2 minutes ago)", date_age(dt, now))

    dt = datetime.datetime(2012, 6, 10, 8, 30, 10, tzinfo=utc)
    self.assertEquals("2012-06-10 16:30 (2 hours ago)", date_age(dt, now))

    # for coverage: test when using default parameter now=None
    dt_patcher = mock.patch.object(filters.datetime, 'datetime',
                                   mock.Mock(wraps=datetime.datetime))
    with dt_patcher as mocked:
      mocked.utcnow.return_value = now
      self.assertEquals("2012-06-10 16:30 (2 hours ago)", date_age(dt))

  def test_abbrev(self):
    abbrev = filters.abbrev
    self.assertEquals(u'test', abbrev(u'test', 20))
    self.assertEquals(u'Longer test...e truncated',
                      abbrev(u'Longer test. it should be truncated', 25))

  def test_linkify(self):
    tmpl = env.from_string('{{ "http://test.example.com"|linkify}}')
    rendered = tmpl.render()
    el = html5lib.parseFragment(rendered)
    self.assertEquals(len(el.getchildren()), 1)
    el = el.getchildren()[0]
    self.assertEquals(el.tag, u'{http://www.w3.org/1999/xhtml}a')
    self.assertEquals(el.text, u'http://test.example.com')
    self.assertEquals(
      sorted(el.items()),
      [(u'href', u'http://test.example.com'), (u'rel', u'nofollow')]
    )

  def test_nl2br(self):
    tmpl = env.from_string(
      '{{ "first line\nsecond line\n\n  third, indented" | nl2br }}')
    self.assertEquals(tmpl.render(),
        u'first line<br />\nsecond line<br />\n<br />\n  third, indented')

  def test_paragraphs(self):
    tmpl = env.from_string(
    '''{{ "First paragraph
    some text
    with line return

    Second paragraph
    ... lorem

    Last one - a single line" | paragraphs }}
    ''')

    self.assertEquals(tmpl.render(),
        u'''<p>First paragraph<br />
    some text<br />
    with line return</p>

<p>Second paragraph<br />
    ... lorem</p>

<p>Last one - a single line</p>
    ''')
