"""
    test_util_nodes
    ~~~~~~~~~~~~~~~

    Tests uti.nodes functions.

    :copyright: Copyright 2007-2020 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""
from textwrap import dedent
from typing import Any

import pytest
from docutils import frontend
from docutils import nodes
from docutils.parsers import rst
from docutils.utils import new_document

from sphinx.transforms import ApplySourceWorkaround
from sphinx.util.nodes import (
    NodeMatcher, extract_messages, clean_astext, make_id, split_explicit_title
)


def _transform(doctree):
    ApplySourceWorkaround(doctree).apply()


def create_new_document():
    settings = frontend.OptionParser(
        components=(rst.Parser,)).get_default_values()
    settings.id_prefix = 'id'
    document = new_document('dummy.txt', settings)
    return document


def _get_doctree(text):
    document = create_new_document()
    rst.Parser().parse(text, document)
    _transform(document)
    return document


def assert_node_count(messages, node_type, expect_count):
    count = 0
    node_list = [node for node, msg in messages]
    for node in node_list:
        if isinstance(node, node_type):
            count += 1

    assert count == expect_count, (
        "Count of %r in the %r is %d instead of %d"
        % (node_type, node_list, count, expect_count))


def test_NodeMatcher():
    doctree = nodes.document(None, None)
    doctree += nodes.paragraph('', 'Hello')
    doctree += nodes.paragraph('', 'Sphinx', block=1)
    doctree += nodes.paragraph('', 'World', block=2)
    doctree += nodes.literal_block('', 'blah blah blah', block=3)

    # search by node class
    matcher = NodeMatcher(nodes.paragraph)
    assert len(doctree.traverse(matcher)) == 3

    # search by multiple node classes
    matcher = NodeMatcher(nodes.paragraph, nodes.literal_block)
    assert len(doctree.traverse(matcher)) == 4

    # search by node attribute
    matcher = NodeMatcher(block=1)
    assert len(doctree.traverse(matcher)) == 1

    # search by node attribute (Any)
    matcher = NodeMatcher(block=Any)
    assert len(doctree.traverse(matcher)) == 3

    # search by both class and attribute
    matcher = NodeMatcher(nodes.paragraph, block=Any)
    assert len(doctree.traverse(matcher)) == 2

    # mismatched
    matcher = NodeMatcher(nodes.title)
    assert len(doctree.traverse(matcher)) == 0

    # search with Any does not match to Text node
    matcher = NodeMatcher(blah=Any)
    assert len(doctree.traverse(matcher)) == 0


@pytest.mark.parametrize(
    'rst,node_cls,count',
    [
        (
            """
           .. admonition:: admonition title

              admonition body
           """,
            nodes.title, 1
        ),
        (
            """
           .. figure:: foo.jpg

              this is title
           """,
            nodes.caption, 1,
        ),
        (
            """
           .. rubric:: spam
           """,
            nodes.rubric, 1,
        ),
        (
            """
           | spam
           | egg
           """,
            nodes.line, 2,
        ),
        (
            """
           section
           =======

           +----------------+
           | | **Title 1**  |
           | | Message 1    |
           +----------------+
           """,
            nodes.line, 2,
        ),
        (
            """
           * | **Title 1**
             | Message 1
           """,
            nodes.line, 2,

        ),
    ]
)
def test_extract_messages(rst, node_cls, count):
    msg = extract_messages(_get_doctree(dedent(rst)))
    assert_node_count(msg, node_cls, count)


def test_extract_messages_without_rawsource():
    """
    Check node.rawsource is fall-backed by using node.astext() value.

    `extract_message` which is used from Sphinx i18n feature drop ``not node.rawsource``
    nodes. So, all nodes which want to translate must have ``rawsource`` value.
    However, sometimes node.rawsource is not set.

    For example: recommonmark-0.2.0 doesn't set rawsource to `paragraph` node.

    refs #1994: Fall back to node's astext() during i18n message extraction.
    """
    p = nodes.paragraph()
    p.append(nodes.Text('test'))
    p.append(nodes.Text('sentence'))
    assert not p.rawsource  # target node must not have rawsource value
    document = create_new_document()
    document.append(p)
    _transform(document)
    assert_node_count(extract_messages(document), nodes.TextElement, 1)
    assert [m for n, m in extract_messages(document)][0], 'text sentence'


def test_clean_astext():
    node = nodes.paragraph(text='hello world')
    assert 'hello world' == clean_astext(node)

    node = nodes.image(alt='hello world')
    assert '' == clean_astext(node)

    node = nodes.paragraph(text='hello world')
    node += nodes.raw('', 'raw text', format='html')
    assert 'hello world' == clean_astext(node)


@pytest.mark.parametrize(
    'prefix, term, expected',
    [
        ('', '', 'id0'),
        ('term', '', 'term-0'),
        ('term', 'Sphinx', 'term-sphinx'),
        ('', 'io.StringIO', 'io.stringio'),   # contains a dot
        ('', 'sphinx.setup_command', 'sphinx.setup_command'),  # contains a dot & underscore
        ('', '_io.StringIO', 'io.stringio'),  # starts with underscore
        ('', 'ｓｐｈｉｎｘ', 'sphinx'),  # alphabets in unicode fullwidth characters
        ('', '悠好', 'id0'),  # multibytes text (in Chinese)
        ('', 'Hello=悠好=こんにちは', 'hello'),  # alphabets and multibytes text
        ('', 'fünf', 'funf'),  # latin1 (umlaut)
        ('', '0sphinx', 'sphinx'),  # starts with number
        ('', 'sphinx-', 'sphinx'),  # ends with hyphen
    ])
def test_make_id(app, prefix, term, expected):
    document = create_new_document()
    assert make_id(app.env, document, prefix, term) == expected


def test_make_id_already_registered(app):
    document = create_new_document()
    document.ids['term-sphinx'] = True  # register "term-sphinx" manually
    assert make_id(app.env, document, 'term', 'Sphinx') == 'term-0'


def test_make_id_sequential(app):
    document = create_new_document()
    document.ids['term-0'] = True
    assert make_id(app.env, document, 'term') == 'term-1'


@pytest.mark.parametrize(
    'title, expected',
    [
        # implicit
        ('hello', (False, 'hello', 'hello')),
        # explicit
        ('hello <world>', (True, 'hello', 'world')),
        # explicit (title having angle brackets)
        ('hello <world> <sphinx>', (True, 'hello <world>', 'sphinx')),
    ]
)
def test_split_explicit_target(title, expected):
    assert expected == split_explicit_title(title)