# coding: utf-8

from __future__ import (
    absolute_import,
    print_function,
    unicode_literals,
)

from pydocx.test import DocumentGeneratorTestCase
from pydocx.test.utils import WordprocessingDocumentFactory
from pydocx.openxml.packaging import MainDocumentPart, StyleDefinitionsPart


class StyleBasedOnTestCase(DocumentGeneratorTestCase):
    def test_style_chain_ends_when_loop_is_detected(self):
        style_xml = '''
            <style styleId="one">
              <basedOn val="three"/>
              <rPr>
                <b val="on"/>
              </rPr>
            </style>
            <style styleId="two">
              <basedOn val="one"/>
            </style>
            <style styleId="three">
              <basedOn val="two"/>
            </style>
        '''

        document_xml = '''
            <p>
              <pPr>
                <pStyle val="three"/>
              </pPr>
              <r>
                <t>aaa</t>
              </r>
            </p>
        '''

        document = WordprocessingDocumentFactory()
        document.add(StyleDefinitionsPart, style_xml)
        document.add(MainDocumentPart, document_xml)

        expected_html = '<p><strong>aaa</strong></p>'
        self.assert_document_generates_html(document, expected_html)

    def test_styles_are_inherited(self):
        style_xml = '''
            <style styleId="one">
              <rPr>
                <b val="on"/>
              </rPr>
            </style>
            <style styleId="two">
              <basedOn val="one"/>
              <rPr>
                <i val="on"/>
              </rPr>
            </style>
            <style styleId="three">
              <basedOn val="two"/>
              <rPr>
                <u val="single"/>
              </rPr>
            </style>
        '''

        document_xml = '''
            <p>
              <pPr>
                <pStyle val="three"/>
              </pPr>
              <r>
                <t>aaa</t>
              </r>
            </p>
        '''

        document = WordprocessingDocumentFactory()
        document.add(StyleDefinitionsPart, style_xml)
        document.add(MainDocumentPart, document_xml)

        expected_html = '''
            <p>
              <span class="pydocx-underline">
                <em>
                  <strong>aaa</strong>
                </em>
              </span>
            </p>
        '''
        self.assert_document_generates_html(document, expected_html)

    def test_basedon_ignored_for_character_based_on_paragraph(self):
        # character styles may only be based on other character styles
        # otherwise, the based on specification should be ignored
        style_xml = '''
            <style styleId="one" type="paragraph">
              <rPr>
                <b val="on"/>
              </rPr>
            </style>
            <style styleId="two" type="character">
              <basedOn val="one"/>
              <rPr>
                <i val="on"/>
              </rPr>
            </style>
        '''

        document_xml = '''
            <p>
              <r>
                <rPr>
                  <rStyle val="two"/>
                </rPr>
                <t>aaa</t>
              </r>
            </p>
        '''

        document = WordprocessingDocumentFactory()
        document.add(StyleDefinitionsPart, style_xml)
        document.add(MainDocumentPart, document_xml)

        expected_html = '<p><em>aaa</em></p>'
        self.assert_document_generates_html(document, expected_html)

    def test_basedon_ignored_for_paragraph_based_on_character(self):
        # paragraph styles may only be based on other paragraph styles
        # otherwise, the based on specification should be ignored
        style_xml = '''
            <style styleId="one" type="character">
              <rPr>
                <b val="on"/>
              </rPr>
            </style>
            <style styleId="two" type="paragraph">
              <basedOn val="one"/>
              <rPr>
                <i val="on"/>
              </rPr>
            </style>
        '''

        document_xml = '''
            <p>
              <pPr>
                <pStyle val="two"/>
              </pPr>
              <r>
                <t>aaa</t>
              </r>
            </p>
        '''

        document = WordprocessingDocumentFactory()
        document.add(StyleDefinitionsPart, style_xml)
        document.add(MainDocumentPart, document_xml)

        expected_html = '<p><em>aaa</em></p>'
        self.assert_document_generates_html(document, expected_html)