# encoding: utf-8

"""
Test suite for the docx.shared module
"""

from __future__ import (
    absolute_import, division, print_function, unicode_literals
)

import pytest

from docx.opc.part import XmlPart
from docx.shared import (
    ElementProxy, Length, Cm, Emu, Inches, Mm, Pt, RGBColor, Twips
)

from .unitutil.cxml import element
from .unitutil.mock import instance_mock


class DescribeElementProxy(object):

    def it_knows_when_its_equal_to_another_proxy_object(self, eq_fixture):
        proxy, proxy_2, proxy_3, not_a_proxy = eq_fixture

        assert (proxy == proxy_2) is True
        assert (proxy == proxy_3) is False
        assert (proxy == not_a_proxy) is False

        assert (proxy != proxy_2) is False
        assert (proxy != proxy_3) is True
        assert (proxy != not_a_proxy) is True

    def it_knows_its_element(self, element_fixture):
        proxy, element = element_fixture
        assert proxy.element is element

    def it_knows_its_part(self, part_fixture):
        proxy, part_ = part_fixture
        assert proxy.part is part_

    # fixture --------------------------------------------------------

    @pytest.fixture
    def element_fixture(self):
        p = element('w:p')
        proxy = ElementProxy(p)
        return proxy, p

    @pytest.fixture
    def eq_fixture(self):
        p, q = element('w:p'), element('w:p')
        proxy = ElementProxy(p)
        proxy_2 = ElementProxy(p)
        proxy_3 = ElementProxy(q)
        not_a_proxy = 'Foobar'
        return proxy, proxy_2, proxy_3, not_a_proxy

    @pytest.fixture
    def part_fixture(self, other_proxy_, part_):
        other_proxy_.part = part_
        proxy = ElementProxy(None, other_proxy_)
        return proxy, part_

    # fixture components ---------------------------------------------

    @pytest.fixture
    def other_proxy_(self, request):
        return instance_mock(request, ElementProxy)

    @pytest.fixture
    def part_(self, request):
        return instance_mock(request, XmlPart)


class DescribeLength(object):

    def it_can_construct_from_convenient_units(self, construct_fixture):
        UnitCls, units_val, emu = construct_fixture
        length = UnitCls(units_val)
        assert isinstance(length, Length)
        assert length == emu

    def it_can_self_convert_to_convenient_units(self, units_fixture):
        emu, units_prop_name, expected_length_in_units, type_ = units_fixture
        length = Length(emu)
        length_in_units = getattr(length, units_prop_name)
        assert length_in_units == expected_length_in_units
        assert isinstance(length_in_units, type_)

    # fixtures -------------------------------------------------------

    @pytest.fixture(params=[
        (Length,      914400,  914400),
        (Inches,      1.1,    1005840),
        (Cm,          2.53,    910799),
        (Emu,         9144.9,    9144),
        (Mm,          13.8,    496800),
        (Pt,          24.5,    311150),
        (Twips,       360,     228600),
    ])
    def construct_fixture(self, request):
        UnitCls, units_val, emu = request.param
        return UnitCls, units_val, emu

    @pytest.fixture(params=[
        (914400, 'inches', 1.0,    float),
        (914400, 'cm',     2.54,   float),
        (914400, 'emu',    914400, int),
        (914400, 'mm',     25.4,   float),
        (914400, 'pt',     72.0,   float),
        (914400, 'twips',  1440,   int),
    ])
    def units_fixture(self, request):
        emu, units_prop_name, expected_length_in_units, type_ = request.param
        return emu, units_prop_name, expected_length_in_units, type_


class DescribeRGBColor(object):

    def it_is_natively_constructed_using_three_ints_0_to_255(self):
        RGBColor(0x12, 0x34, 0x56)
        with pytest.raises(ValueError):
            RGBColor('12', '34', '56')
        with pytest.raises(ValueError):
            RGBColor(-1, 34, 56)
        with pytest.raises(ValueError):
            RGBColor(12, 256, 56)

    def it_can_construct_from_a_hex_string_rgb_value(self):
        rgb = RGBColor.from_string('123456')
        assert rgb == RGBColor(0x12, 0x34, 0x56)

    def it_can_provide_a_hex_string_rgb_value(self):
        assert str(RGBColor(0x12, 0x34, 0x56)) == '123456'

    def it_has_a_custom_repr(self):
        rgb_color = RGBColor(0x42, 0xF0, 0xBA)
        assert repr(rgb_color) == 'RGBColor(0x42, 0xf0, 0xba)'