# encoding: utf-8

"""Unit test suite for the docx.styles.styles module"""

from __future__ import absolute_import, division, print_function, unicode_literals

import pytest

from docx.enum.style import WD_STYLE_TYPE
from docx.oxml.styles import CT_Style, CT_Styles
from docx.styles.latent import LatentStyles
from docx.styles.style import BaseStyle
from docx.styles.styles import Styles

from ..unitutil.cxml import element
from ..unitutil.mock import (
    call, class_mock, function_mock, instance_mock, method_mock
)


class DescribeStyles(object):

    def it_supports_the_in_operator_on_style_name(self, in_fixture):
        styles, name, expected_value = in_fixture
        assert (name in styles) is expected_value

    def it_knows_its_length(self, len_fixture):
        styles, expected_value = len_fixture
        assert len(styles) == expected_value

    def it_can_iterate_over_its_styles(self, iter_fixture):
        styles, expected_count, style_, StyleFactory_, expected_calls = (
            iter_fixture
        )
        count = 0
        for style in styles:
            assert style is style_
            count += 1
        assert count == expected_count
        assert StyleFactory_.call_args_list == expected_calls

    @pytest.mark.filterwarnings('ignore::UserWarning')
    def it_can_get_a_style_by_id(self, getitem_id_fixture):
        styles, key, expected_element = getitem_id_fixture
        style = styles[key]
        assert style._element is expected_element

    def it_can_get_a_style_by_name(self, getitem_name_fixture):
        styles, key, expected_element = getitem_name_fixture
        style = styles[key]
        assert style._element is expected_element

    def it_raises_on_style_not_found(self, get_raises_fixture):
        styles, key = get_raises_fixture
        with pytest.raises(KeyError):
            styles[key]

    def it_can_add_a_new_style(self, add_fixture):
        styles, name, style_type, builtin = add_fixture[:4]
        name_, StyleFactory_, style_elm_, style_ = add_fixture[4:]

        style = styles.add_style(name, style_type, builtin)

        styles._element.add_style_of_type.assert_called_once_with(
            name_, style_type, builtin
        )
        StyleFactory_.assert_called_once_with(style_elm_)
        assert style is style_

    def it_raises_when_style_name_already_used(self, add_raises_fixture):
        styles, name = add_raises_fixture
        with pytest.raises(ValueError):
            styles.add_style(name, None)

    def it_can_get_the_default_style_for_a_type(self, default_fixture):
        styles, style_type, StyleFactory_ = default_fixture[:3]
        StyleFactory_calls, style_ = default_fixture[3:]

        style = styles.default(style_type)

        assert StyleFactory_.call_args_list == StyleFactory_calls
        assert style is style_

    def it_can_get_a_style_of_type_by_id(self, _get_by_id_, style_):
        style_id, style_type = 42, 7
        _get_by_id_.return_value = style_
        styles = Styles(None)

        style = styles.get_by_id(style_id, style_type)

        _get_by_id_.assert_called_once_with(styles, style_id, style_type)
        assert style is style_

    def but_it_returns_the_default_style_for_style_id_None(self, default_, style_):
        style_type = 17
        default_.return_value = style_
        styles = Styles(None)

        style = styles.get_by_id(None, style_type)

        default_.assert_called_once_with(styles, style_type)
        assert style is style_

    def it_can_get_a_style_id_from_a_style(self, _get_style_id_from_style_):
        style = BaseStyle(None)
        style_type = 22
        _get_style_id_from_style_.return_value = "StyleId"
        styles = Styles(None)

        style_id = styles.get_style_id(style, style_type)

        _get_style_id_from_style_.assert_called_once_with(styles, style, style_type)
        assert style_id == "StyleId"

    def and_it_can_get_a_style_id_from_a_style_name(self, _get_style_id_from_name_):
        style_type = 22
        _get_style_id_from_name_.return_value = "StyleId"
        styles = Styles(None)

        style_id = styles.get_style_id("Style Name", style_type)

        _get_style_id_from_name_.assert_called_once_with(
            styles, "Style Name", style_type
        )
        assert style_id == "StyleId"

    def but_it_returns_None_for_a_style_or_name_of_None(self):
        styles = Styles(None)

        style_id = styles.get_style_id(None, style_type=22)

        assert style_id is None

    def it_gets_a_style_by_id_to_help(self, _get_by_id_fixture):
        styles, style_id, style_type, default_calls = _get_by_id_fixture[:4]
        StyleFactory_, StyleFactory_calls, style_ = _get_by_id_fixture[4:]

        style = styles._get_by_id(style_id, style_type)

        assert styles.default.call_args_list == default_calls
        assert StyleFactory_.call_args_list == StyleFactory_calls
        assert style is style_

    def it_gets_a_style_id_from_a_name_to_help(
        self, _getitem_, _get_style_id_from_style_, style_
    ):
        style_name, style_type, style_id_ = 'Foo Bar', 1, 'FooBar'
        _getitem_.return_value = style_
        _get_style_id_from_style_.return_value = style_id_
        styles = Styles(None)

        style_id = styles._get_style_id_from_name(style_name, style_type)

        styles.__getitem__.assert_called_once_with(styles, style_name)
        _get_style_id_from_style_.assert_called_once_with(styles, style_, style_type)
        assert style_id is style_id_

    def it_gets_a_style_id_from_a_style_to_help(self, id_style_fixture):
        styles, style_, style_type, style_id_ = id_style_fixture

        style_id = styles._get_style_id_from_style(style_, style_type)

        styles.default.assert_called_once_with(styles, style_type)
        assert style_id is style_id_

    def it_raises_on_style_type_mismatch(self, id_style_raises_fixture):
        styles, style_, style_type = id_style_raises_fixture
        with pytest.raises(ValueError):
            styles._get_style_id_from_style(style_, style_type)

    def it_provides_access_to_the_latent_styles(self, latent_styles_fixture):
        styles, LatentStyles_, latent_styles_ = latent_styles_fixture
        latent_styles = styles.latent_styles
        LatentStyles_.assert_called_once_with(styles._element.latentStyles)
        assert latent_styles is latent_styles_

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

    @pytest.fixture(params=[
        ('Foo Bar',   'Foo Bar',   WD_STYLE_TYPE.CHARACTER, False),
        ('Heading 1', 'heading 1', WD_STYLE_TYPE.PARAGRAPH, True),
    ])
    def add_fixture(self, request, styles_elm_, _getitem_, style_elm_,
                    StyleFactory_, style_):
        name, name_, style_type, builtin = request.param
        styles = Styles(styles_elm_)
        _getitem_.return_value = None
        styles_elm_.add_style_of_type.return_value = style_elm_
        StyleFactory_.return_value = style_
        return (
            styles, name, style_type, builtin, name_, StyleFactory_,
            style_elm_, style_
        )

    @pytest.fixture
    def add_raises_fixture(self, _getitem_):
        styles = Styles(element('w:styles/w:style/w:name{w:val=heading 1}'))
        name = 'Heading 1'
        return styles, name

    @pytest.fixture(params=[
        ('w:styles',
         False, WD_STYLE_TYPE.CHARACTER),
        ('w:styles/w:style{w:type=paragraph,w:default=1}',
         True, WD_STYLE_TYPE.PARAGRAPH),
        ('w:styles/(w:style{w:type=table,w:default=1},w:style{w:type=table,w'
         ':default=1})',
         True, WD_STYLE_TYPE.TABLE),
    ])
    def default_fixture(self, request, StyleFactory_, style_):
        styles_cxml, is_defined, style_type = request.param
        styles_elm = element(styles_cxml)
        styles = Styles(styles_elm)
        StyleFactory_calls = [call(styles_elm[-1])] if is_defined else []
        StyleFactory_.return_value = style_
        expected_value = style_ if is_defined else None
        return (
            styles, style_type, StyleFactory_, StyleFactory_calls,
            expected_value
        )

    @pytest.fixture(params=[
        ('w:styles/w:style{w:type=paragraph,w:styleId=Foo}', 'Foo',
         WD_STYLE_TYPE.PARAGRAPH),
        ('w:styles/w:style{w:type=paragraph,w:styleId=Foo}', 'Bar',
         WD_STYLE_TYPE.PARAGRAPH),
        ('w:styles/w:style{w:type=table,w:styleId=Bar}',     'Bar',
         WD_STYLE_TYPE.PARAGRAPH),
    ])
    def _get_by_id_fixture(self, request, default_, StyleFactory_, style_):
        styles_cxml, style_id, style_type = request.param
        styles_elm = element(styles_cxml)
        style_elm = styles_elm[0]
        styles = Styles(styles_elm)
        default_calls = [] if style_id == 'Foo' else [call(styles, style_type)]
        StyleFactory_calls = [call(style_elm)] if style_id == 'Foo' else []
        default_.return_value = StyleFactory_.return_value = style_
        return (
            styles, style_id, style_type, default_calls, StyleFactory_,
            StyleFactory_calls, style_
        )

    @pytest.fixture(params=[
        ('w:styles/(w:style{%s,w:styleId=Foobar},w:style,w:style)', 0),
        ('w:styles/(w:style,w:style{%s,w:styleId=Foobar},w:style)', 1),
        ('w:styles/(w:style,w:style,w:style{%s,w:styleId=Foobar})', 2),
    ])
    def getitem_id_fixture(self, request):
        styles_cxml_tmpl, style_idx = request.param
        styles_cxml = styles_cxml_tmpl % 'w:type=paragraph'
        styles = Styles(element(styles_cxml))
        expected_element = styles._element[style_idx]
        return styles, 'Foobar', expected_element

    @pytest.fixture(params=[
        ('w:styles/(w:style%s/w:name{w:val=foo},w:style)', 'foo',       0),
        ('w:styles/(w:style,w:style%s/w:name{w:val=foo})', 'foo',       1),
        ('w:styles/w:style%s/w:name{w:val=heading 1}',     'Heading 1', 0),
    ])
    def getitem_name_fixture(self, request):
        styles_cxml_tmpl, key, style_idx = request.param
        styles_cxml = styles_cxml_tmpl % '{w:type=character}'
        styles = Styles(element(styles_cxml))
        expected_element = styles._element[style_idx]
        return styles, key, expected_element

    @pytest.fixture(params=[
        ('w:styles/(w:style,w:style/w:name{w:val=foo},w:style)'),
        ('w:styles/(w:style{w:styleId=foo},w:style,w:style)'),
    ])
    def get_raises_fixture(self, request):
        styles_cxml = request.param
        styles = Styles(element(styles_cxml))
        return styles, 'bar'

    @pytest.fixture(params=[True, False])
    def id_style_fixture(self, request, default_, style_):
        style_is_default = request.param
        styles = Styles(None)
        style_id, style_type = 'FooBar', 1
        default_.return_value = style_ if style_is_default else None
        style_.style_id, style_.type = style_id, style_type
        expected_value = None if style_is_default else style_id
        return styles, style_, style_type, expected_value

    @pytest.fixture
    def id_style_raises_fixture(self, style_):
        styles = Styles(None)
        style_.type = 1
        style_type = 2
        return styles, style_, style_type

    @pytest.fixture(params=[
        ('w:styles/w:style/w:name{w:val=heading 1}', 'Heading 1', True),
        ('w:styles/w:style/w:name{w:val=Foo Bar}',   'Foo Bar',   True),
        ('w:styles/w:style/w:name{w:val=heading 1}', 'Foobar',    False),
        ('w:styles',                                 'Foobar',    False),
    ])
    def in_fixture(self, request):
        styles_cxml, name, expected_value = request.param
        styles = Styles(element(styles_cxml))
        return styles, name, expected_value

    @pytest.fixture(params=[
        ('w:styles',                           0),
        ('w:styles/w:style',                   1),
        ('w:styles/(w:style,w:style)',         2),
        ('w:styles/(w:style,w:style,w:style)', 3),
    ])
    def iter_fixture(self, request, StyleFactory_, style_):
        styles_cxml, expected_count = request.param
        styles_elm = element(styles_cxml)
        styles = Styles(styles_elm)
        expected_calls = [call(style_elm) for style_elm in styles_elm]
        StyleFactory_.return_value = style_
        return styles, expected_count, style_, StyleFactory_, expected_calls

    @pytest.fixture
    def latent_styles_fixture(self, LatentStyles_, latent_styles_):
        styles = Styles(element('w:styles/w:latentStyles'))
        return styles, LatentStyles_, latent_styles_

    @pytest.fixture(params=[
        ('w:styles',                           0),
        ('w:styles/w:style',                   1),
        ('w:styles/(w:style,w:style)',         2),
        ('w:styles/(w:style,w:style,w:style)', 3),
    ])
    def len_fixture(self, request):
        styles_cxml, expected_value = request.param
        styles = Styles(element(styles_cxml))
        return styles, expected_value

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

    @pytest.fixture
    def default_(self, request):
        return method_mock(request, Styles, 'default')

    @pytest.fixture
    def _get_by_id_(self, request):
        return method_mock(request, Styles, '_get_by_id')

    @pytest.fixture
    def _getitem_(self, request):
        return method_mock(request, Styles, '__getitem__')

    @pytest.fixture
    def _get_style_id_from_name_(self, request):
        return method_mock(request, Styles, '_get_style_id_from_name')

    @pytest.fixture
    def _get_style_id_from_style_(self, request):
        return method_mock(request, Styles, '_get_style_id_from_style')

    @pytest.fixture
    def LatentStyles_(self, request, latent_styles_):
        return class_mock(
            request, 'docx.styles.styles.LatentStyles',
            return_value=latent_styles_
        )

    @pytest.fixture
    def latent_styles_(self, request):
        return instance_mock(request, LatentStyles)

    @pytest.fixture
    def style_(self, request):
        return instance_mock(request, BaseStyle)

    @pytest.fixture
    def StyleFactory_(self, request):
        return function_mock(request, 'docx.styles.styles.StyleFactory')

    @pytest.fixture
    def style_elm_(self, request):
        return instance_mock(request, CT_Style)

    @pytest.fixture
    def styles_elm_(self, request):
        return instance_mock(request, CT_Styles)