# -*- coding: utf-8 -*-
"""
    test_intersphinx
    ~~~~~~~~~~~~~~~~

    Test the intersphinx extension.

    :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""

import unittest

from docutils import nodes
import mock
import pytest
import requests
from io import BytesIO
import os

from sphinx import addnodes
from sphinx.ext.intersphinx import setup as intersphinx_setup
from sphinx.ext.intersphinx import (
    load_mappings, missing_reference, _strip_basic_auth,
    _get_safe_url, fetch_inventory, INVENTORY_FILENAME, debug
)
from test_util_inventory import inventory_v2


def fake_node(domain, type, target, content, **attrs):
    contnode = nodes.emphasis(content, content)
    node = addnodes.pending_xref('')
    node['reftarget'] = target
    node['reftype'] = type
    node['refdomain'] = domain
    node.attributes.update(attrs)
    node += contnode
    return node, contnode


def reference_check(app, *args, **kwds):
    node, contnode = fake_node(*args, **kwds)
    return missing_reference(app, app.env, node, contnode)


@mock.patch('sphinx.ext.intersphinx.InventoryFile')
@mock.patch('sphinx.ext.intersphinx._read_from_url')
def test_fetch_inventory_redirection(_read_from_url, InventoryFile, app, status, warning):
    intersphinx_setup(app)
    _read_from_url().readline.return_value = '# Sphinx inventory version 2'.encode('utf-8')

    # same uri and inv, not redirected
    _read_from_url().url = 'http://hostname/' + INVENTORY_FILENAME
    fetch_inventory(app, 'http://hostname/', 'http://hostname/' + INVENTORY_FILENAME)
    assert 'intersphinx inventory has moved' not in status.getvalue()
    assert InventoryFile.load.call_args[0][1] == 'http://hostname/'

    # same uri and inv, redirected
    status.seek(0)
    status.truncate(0)
    _read_from_url().url = 'http://hostname/new/' + INVENTORY_FILENAME

    fetch_inventory(app, 'http://hostname/', 'http://hostname/' + INVENTORY_FILENAME)
    assert status.getvalue() == ('intersphinx inventory has moved: '
                                 'http://hostname/%s -> http://hostname/new/%s\n' %
                                 (INVENTORY_FILENAME, INVENTORY_FILENAME))
    assert InventoryFile.load.call_args[0][1] == 'http://hostname/new'

    # different uri and inv, not redirected
    status.seek(0)
    status.truncate(0)
    _read_from_url().url = 'http://hostname/new/' + INVENTORY_FILENAME

    fetch_inventory(app, 'http://hostname/', 'http://hostname/new/' + INVENTORY_FILENAME)
    assert 'intersphinx inventory has moved' not in status.getvalue()
    assert InventoryFile.load.call_args[0][1] == 'http://hostname/'

    # different uri and inv, redirected
    status.seek(0)
    status.truncate(0)
    _read_from_url().url = 'http://hostname/other/' + INVENTORY_FILENAME

    fetch_inventory(app, 'http://hostname/', 'http://hostname/new/' + INVENTORY_FILENAME)
    assert status.getvalue() == ('intersphinx inventory has moved: '
                                 'http://hostname/new/%s -> http://hostname/other/%s\n' %
                                 (INVENTORY_FILENAME, INVENTORY_FILENAME))
    assert InventoryFile.load.call_args[0][1] == 'http://hostname/'


@pytest.mark.xfail(os.name != 'posix', reason="Path separator mismatch issue")
def test_missing_reference(tempdir, app, status, warning):
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_mapping = {
        'https://docs.python.org/': inv_file,
        'py3k': ('https://docs.python.org/py3k/', inv_file),
        'py3krel': ('py3k', inv_file),  # relative path
        'py3krelparent': ('../../py3k', inv_file),  # relative path, parent dir
    }
    app.config.intersphinx_cache_limit = 0

    # load the inventory and check if it's done correctly
    load_mappings(app)
    inv = app.env.intersphinx_inventory

    assert inv['py:module']['module2'] == \
        ('foo', '2.0', 'https://docs.python.org/foo.html#module-module2', '-')

    # check resolution when a target is found
    rn = reference_check(app, 'py', 'func', 'module1.func', 'foo')
    assert isinstance(rn, nodes.reference)
    assert rn['refuri'] == 'https://docs.python.org/sub/foo.html#module1.func'
    assert rn['reftitle'] == '(in foo v2.0)'
    assert rn[0].astext() == 'foo'

    # create unresolvable nodes and check None return value
    assert reference_check(app, 'py', 'foo', 'module1.func', 'foo') is None
    assert reference_check(app, 'py', 'func', 'foo', 'foo') is None
    assert reference_check(app, 'py', 'func', 'foo', 'foo') is None

    # check handling of prefixes

    # prefix given, target found: prefix is stripped
    rn = reference_check(app, 'py', 'mod', 'py3k:module2', 'py3k:module2')
    assert rn[0].astext() == 'module2'

    # prefix given, but not in title: nothing stripped
    rn = reference_check(app, 'py', 'mod', 'py3k:module2', 'module2')
    assert rn[0].astext() == 'module2'

    # prefix given, but explicit: nothing stripped
    rn = reference_check(app, 'py', 'mod', 'py3k:module2', 'py3k:module2',
                         refexplicit=True)
    assert rn[0].astext() == 'py3k:module2'

    # prefix given, target not found and nonexplicit title: prefix is stripped
    node, contnode = fake_node('py', 'mod', 'py3k:unknown', 'py3k:unknown',
                               refexplicit=False)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn is None
    assert contnode[0].astext() == 'unknown'

    # prefix given, target not found and explicit title: nothing is changed
    node, contnode = fake_node('py', 'mod', 'py3k:unknown', 'py3k:unknown',
                               refexplicit=True)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn is None
    assert contnode[0].astext() == 'py3k:unknown'

    # check relative paths
    rn = reference_check(app, 'py', 'mod', 'py3krel:module1', 'foo')
    assert rn['refuri'] == 'py3k/foo.html#module-module1'

    rn = reference_check(app, 'py', 'mod', 'py3krelparent:module1', 'foo')
    assert rn['refuri'] == '../../py3k/foo.html#module-module1'

    rn = reference_check(app, 'py', 'mod', 'py3krel:module1', 'foo', refdoc='sub/dir/test')
    assert rn['refuri'] == '../../py3k/foo.html#module-module1'

    rn = reference_check(app, 'py', 'mod', 'py3krelparent:module1', 'foo',
                         refdoc='sub/dir/test')
    assert rn['refuri'] == '../../../../py3k/foo.html#module-module1'

    # check refs of standard domain
    rn = reference_check(app, 'std', 'doc', 'docname', 'docname')
    assert rn['refuri'] == 'https://docs.python.org/docname.html'


def test_missing_reference_pydomain(tempdir, app, status, warning):
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_mapping = {
        'https://docs.python.org/': inv_file,
    }
    app.config.intersphinx_cache_limit = 0

    # load the inventory and check if it's done correctly
    load_mappings(app)

    # no context data
    kwargs = {}
    node, contnode = fake_node('py', 'func', 'func', 'func()', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn is None

    # py:module context helps to search objects
    kwargs = {'py:module': 'module1'}
    node, contnode = fake_node('py', 'func', 'func', 'func()', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn.astext() == 'func()'


def test_missing_reference_stddomain(tempdir, app, status, warning):
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_mapping = {
        'cmd': ('https://docs.python.org/', inv_file),
    }
    app.config.intersphinx_cache_limit = 0

    # load the inventory and check if it's done correctly
    load_mappings(app)

    # no context data
    kwargs = {}
    node, contnode = fake_node('std', 'option', '-l', '-l', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn is None

    # std:program context helps to search objects
    kwargs = {'std:program': 'ls'}
    node, contnode = fake_node('std', 'option', '-l', 'ls -l', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn.astext() == 'ls -l'

    # refers inventory by name
    kwargs = {}
    node, contnode = fake_node('std', 'option', 'cmd:ls -l', '-l', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn.astext() == '-l'


@pytest.mark.sphinx('html', testroot='ext-intersphinx-cppdomain')
def test_missing_reference_cppdomain(tempdir, app, status, warning):
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_mapping = {
        'https://docs.python.org/': inv_file,
    }
    app.config.intersphinx_cache_limit = 0

    # load the inventory and check if it's done correctly
    load_mappings(app)

    app.build()
    html = (app.outdir / 'index.html').text()
    assert ('<a class="reference external"'
            ' href="https://docs.python.org/index.html#cpp_foo_bar"'
            ' title="(in foo v2.0)"><code class="xref cpp cpp-class docutils literal">'
            '<span class="pre">Bar</span></code></a>' in html)
    assert ('<a class="reference external"'
            ' href="https://docs.python.org/index.html#std"'
            ' title="(in foo v2.0)">std</a>' in html)
    assert ('<a class="reference external"'
            ' href="https://docs.python.org/index.html#std_uint8_t"'
            ' title="(in foo v2.0)">uint8_t</a>' in html)


def test_missing_reference_jsdomain(tempdir, app, status, warning):
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_mapping = {
        'https://docs.python.org/': inv_file,
    }
    app.config.intersphinx_cache_limit = 0

    # load the inventory and check if it's done correctly
    load_mappings(app)

    # no context data
    kwargs = {}
    node, contnode = fake_node('js', 'meth', 'baz', 'baz()', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn is None

    # js:module and js:object context helps to search objects
    kwargs = {'js:module': 'foo', 'js:object': 'bar'}
    node, contnode = fake_node('js', 'meth', 'baz', 'baz()', **kwargs)
    rn = missing_reference(app, app.env, node, contnode)
    assert rn.astext() == 'baz()'


def test_load_mappings_warnings(tempdir, app, status, warning):
    """
    load_mappings issues a warning if new-style mapping
    identifiers are not string
    """
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_mapping = {
        'https://docs.python.org/': inv_file,
        'py3k': ('https://docs.python.org/py3k/', inv_file),
        'repoze.workflow': ('http://docs.repoze.org/workflow/', inv_file),
        'django-taggit': ('http://django-taggit.readthedocs.org/en/latest/',
                          inv_file),
        12345: ('http://www.sphinx-doc.org/en/stable/', inv_file),
    }

    app.config.intersphinx_cache_limit = 0
    # load the inventory and check if it's done correctly
    load_mappings(app)
    assert warning.getvalue().count('\n') == 1


def test_load_mappings_fallback(tempdir, app, status, warning):
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)
    app.config.intersphinx_cache_limit = 0

    # connect to invalid path
    app.config.intersphinx_mapping = {
        'fallback': ('https://docs.python.org/py3k/', '/invalid/inventory/path'),
    }
    load_mappings(app)
    assert "failed to reach any of the inventories" in warning.getvalue()

    rn = reference_check(app, 'py', 'func', 'module1.func', 'foo')
    assert rn is None

    # clear messages
    status.truncate(0)
    warning.truncate(0)

    # add fallbacks to mapping
    app.config.intersphinx_mapping = {
        'fallback': ('https://docs.python.org/py3k/', ('/invalid/inventory/path',
                                                       inv_file)),
    }
    load_mappings(app)
    assert "encountered some issues with some of the inventories" in status.getvalue()
    assert "" == warning.getvalue()

    rn = reference_check(app, 'py', 'func', 'module1.func', 'foo')
    assert isinstance(rn, nodes.reference)


class TestStripBasicAuth(unittest.TestCase):
    """Tests for sphinx.ext.intersphinx._strip_basic_auth()"""
    def test_auth_stripped(self):
        """basic auth creds stripped from URL containing creds"""
        url = 'https://user:12345@domain.com/project/objects.inv'
        expected = 'https://domain.com/project/objects.inv'
        actual = _strip_basic_auth(url)
        self.assertEqual(expected, actual)

    def test_no_auth(self):
        """url unchanged if param doesn't contain basic auth creds"""
        url = 'https://domain.com/project/objects.inv'
        expected = 'https://domain.com/project/objects.inv'
        actual = _strip_basic_auth(url)
        self.assertEqual(expected, actual)

    def test_having_port(self):
        """basic auth creds correctly stripped from URL containing creds even if URL
        contains port"""
        url = 'https://user:12345@domain.com:8080/project/objects.inv'
        expected = 'https://domain.com:8080/project/objects.inv'
        actual = _strip_basic_auth(url)
        self.assertEqual(expected, actual)


def test_getsafeurl_authed():
    """_get_safe_url() with a url with basic auth"""
    url = 'https://user:12345@domain.com/project/objects.inv'
    expected = 'https://user@domain.com/project/objects.inv'
    actual = _get_safe_url(url)
    assert expected == actual


def test_getsafeurl_authed_having_port():
    """_get_safe_url() with a url with basic auth having port"""
    url = 'https://user:12345@domain.com:8080/project/objects.inv'
    expected = 'https://user@domain.com:8080/project/objects.inv'
    actual = _get_safe_url(url)
    assert expected == actual


def test_getsafeurl_unauthed():
    """_get_safe_url() with a url without basic auth"""
    url = 'https://domain.com/project/objects.inv'
    expected = 'https://domain.com/project/objects.inv'
    actual = _get_safe_url(url)
    assert expected == actual


def test_debug_noargs(capsys):
    """debug interface, without arguments"""
    with pytest.raises(SystemExit):
        debug(['sphinx/ext/intersphinx.py'])

    expected = (
        "Print out an inventory file.\n"
        "Error: must specify local path or URL to an inventory file."
    )
    stdout, stderr = capsys.readouterr()
    assert stdout == ""
    assert stderr == expected + "\n"


def test_debug_file(capsys, tempdir):
    """debug interface, with file argument"""
    inv_file = tempdir / 'inventory'
    inv_file.write_bytes(inventory_v2)

    debug(['sphinx/ext/intersphinx.py', str(inv_file)])

    stdout, stderr = capsys.readouterr()
    assert stdout.startswith("c:function\n")
    assert stderr == ""


@mock.patch('requests.get')
def test_debug_url(fake_get, capsys):
    """debug interface, with url argument"""
    raw = BytesIO(inventory_v2)
    real_read = raw.read

    def fake_read(*args, **kwargs):
        return real_read()

    raw.read = fake_read
    url = 'http://hostname/' + INVENTORY_FILENAME
    resp = requests.Response()
    resp.status_code = 200
    resp.url = url
    resp.raw = raw
    fake_get.return_value = resp

    debug(['sphinx/ext/intersphinx.py', url])

    stdout, stderr = capsys.readouterr()
    assert stdout.startswith("c:function\n")
    assert stderr == ""
