# -*- coding: utf-8 -*-
# vim: sw=4:ts=4:expandtab
"""
tests.test_fntools
~~~~~~~~~~~~~~~~~~

Provides main unit tests.
"""
import nose.tools as nt
import itertools as it
import requests
import responses

from io import StringIO
from operator import itemgetter

from meza import fntools as ft, io, stats


def setup_module():
    """site initialization"""
    global initialized
    initialized = True
    print('Site Module Setup\n')


class TestIterStringIO:
    def test_strip(self):
        nt.assert_equal('2123.45', ft.strip('2,123.45'))

        parsed = ft.strip('2.123,45', thousand_sep='.', decimal_sep=',')
        nt.assert_equal('2123.45', parsed)
        nt.assert_equal('spam', ft.strip('spam'))

    def test_is_numeric(self):
        nt.assert_true(ft.is_numeric('2,123.45'))
        nt.assert_true(ft.is_numeric('2.123,45'))
        nt.assert_true(ft.is_numeric('0.45'))
        nt.assert_true(ft.is_numeric(1))
        nt.assert_true(ft.is_numeric('10e5'))
        nt.assert_false(ft.is_numeric('spam'))
        nt.assert_false(ft.is_numeric('02139'))
        nt.assert_true(ft.is_numeric('02139', strip_zeros=True))
        nt.assert_false(ft.is_numeric('spam'))
        nt.assert_false(ft.is_numeric(None))
        nt.assert_false(ft.is_numeric(''))

    def test_is_numeric_currency_zero_value(self):
        """Regression test for https://github.com/reubano/meza/issues/36
        """
        for sym in ft.CURRENCIES:
            nt.assert_true(ft.is_numeric(f'0{sym}'))
            nt.assert_true(ft.is_numeric(f'{sym}0'))

    def test_is_int(self):
        nt.assert_false(ft.is_int('5/4/82'))

    def test_is_bool(self):
        nt.assert_true(ft.is_bool('y'))
        nt.assert_true(ft.is_bool(1))
        nt.assert_true(ft.is_bool(False))
        nt.assert_true(ft.is_bool('false'))
        nt.assert_true(ft.is_bool('n'))
        nt.assert_true(ft.is_bool(0))
        nt.assert_false(ft.is_bool(''))
        nt.assert_false(ft.is_bool(None))

    def test_is_null(self):
        nt.assert_false(ft.is_null(''))
        nt.assert_false(ft.is_null(' '))
        nt.assert_false(ft.is_null(False))
        nt.assert_false(ft.is_null('0'))
        nt.assert_false(ft.is_null(0))
        nt.assert_true(ft.is_null('', blanks_as_nulls=True))
        nt.assert_true(ft.is_null(' ', blanks_as_nulls=True))

    def test_byte_array(self):
        content = 'Iñtërnâtiônàližætiøn'
        expected = bytearray('Iñtërnâtiônàližætiøn'.encode('utf-8'))
        nt.assert_equal(expected, ft.byte(content))
        nt.assert_equal(expected, ft.byte(iter(content)))
        nt.assert_equal(expected, ft.byte(list(content)))

    def test_afterish(self):
        nt.assert_equal(-1, ft.afterish('1001', '.'))
        nt.assert_equal(3, ft.afterish('1,001'))
        nt.assert_equal(3, ft.afterish('2,100,001.00'))
        nt.assert_equal(2, ft.afterish('1,000.00', '.'))

        with nt.assert_raises(ValueError):
            ft.afterish('eggs', '.')

    def test_get_separators(self):
        expected = {'thousand_sep': ',', 'decimal_sep': '.'}
        nt.assert_equal(expected, ft.get_separators('2,123.45'))

        expected = {'thousand_sep': '.', 'decimal_sep': ','}
        nt.assert_equal(expected, ft.get_separators('2.123,45'))

        with nt.assert_raises(ValueError):
            ft.get_separators('spam')

    def test_fill(self):
        content = 'column_a,column_b,column_c\n'
        content += '1,27,,too long!\n,too short!\n0,mixed types.uh oh,17'
        f = StringIO(content)
        records = io.read_csv(f)
        previous = {}
        current = next(records)
        expected = {'column_a': '1', 'column_b': '27', 'column_c': ''}
        nt.assert_equal(expected, current)

        length = len(current)
        filled = ft.fill(previous, current, value=0)
        previous = dict(it.islice(filled, length))
        count = next(filled)
        nt.assert_equal(count, {'column_a': 0, 'column_b': 0, 'column_c': 1})

        expected = {'column_a': '1', 'column_b': '27', 'column_c': 0}
        nt.assert_equal(expected, previous)

        current = next(records)

        expected = {
            'column_a': '',
            'column_b': u"too short!",
            'column_c': None,
        }

        nt.assert_equal(expected, current)

        kwargs = {'fill_key': 'column_b', 'count': count}
        filled = ft.fill(previous, current, **kwargs)
        previous = dict(it.islice(filled, length))
        count = next(filled)
        nt.assert_equal({'column_a': 1, 'column_b': 0, 'column_c': 2}, count)

        expected = {
            'column_a': u"too short!",
            'column_b': u"too short!",
            'column_c': u"too short!",
        }

        nt.assert_equal(expected, previous)

    @responses.activate
    def test_chunk(self):
        content = io.StringIO('Iñtërnâtiônàližætiøn')
        nt.assert_equal('Iñtër', next(ft.chunk(content, 5)))
        nt.assert_equal('nâtiônàližætiøn', next(ft.chunk(content)))

        url = 'http://google.com'
        body = '<!doctype html><html itemtype="http://schema.org/page">'
        responses.add(responses.GET, url=url, body=body)
        r = requests.get(url, stream=True)

        # http://docs.python-requests.org/en/latest/api/
        # The chunk size is the number of bytes it should read into
        # memory. This is not necessarily the length of each item returned
        # as decoding can take place.
        nt.assert_equal(20, len(next(ft.chunk(r.iter_content, 20, 29, 200))))
        nt.assert_equal(55, len(next(ft.chunk(r.iter_content))))

    def test_combine(self):
        records = [{'a': 1, 'b': 2, 'c': 3}, {'b': 4, 'c': 5, 'd': 6}]

        # Combine all keys
        pred = lambda key: True
        x, y = records[0], records[1]
        nt.assert_equal(1, ft.combine(x, y, 'a', pred=pred, op=sum))
        nt.assert_equal(6, ft.combine(x, y, 'b', pred=pred, op=sum))
        nt.assert_equal(8, ft.combine(x, y, 'c', pred=pred, op=sum))

        fltrer = lambda x: x is not None
        first = lambda x: next(filter(fltrer, x))
        kwargs = {'pred': pred, 'op': first, 'default': None}
        nt.assert_equal(2, ft.combine(x, y, 'b', **kwargs))

        kwargs = {'pred': pred, 'op': stats.mean, 'default': None}
        nt.assert_equal(1.0, ft.combine(x, y, 'a', **kwargs))
        nt.assert_equal(3.0, ft.combine(x, y, 'b', **kwargs))

        # Only combine key 'b'
        pred = lambda key: key == 'b'
        nt.assert_equal(5, ft.combine(x, y, 'c', pred=pred, op=sum))

        # Only combine keys that have the same value of 'b'
        pred = itemgetter('b')
        nt.assert_equal(6, ft.combine(x, y, 'b', pred=pred, op=sum))
        nt.assert_equal(5, ft.combine(x, y, 'c', pred=pred, op=sum))

    def test_op_everseen(self):
        content = [4, 6, 3, 8, 2, 1]
        expected = [4, 4, 3, 3, 2, 1]
        nt.assert_equal(expected, list(ft.op_everseen(content, pad=True)))
        nt.assert_equal([4, 6, 8], list(ft.op_everseen(content, op='gt')))

    def test_objectify(self):
        kwargs = {'one': '1', 'two': '2'}
        kw = ft.Objectify(kwargs, func=int)
        nt.assert_equal(kw.one, 1)
        nt.assert_equal(kw['two'], 2)
        nt.assert_equal(dict(kw), {'one': 1, 'two': 2})
