# The following tests use a plain Python example module that is at
# sphinx_automodapi.tests.example_module.

# We store different cases in the cases sub-directory of the tests directory

import os
import glob
import shutil
from itertools import product

import pytest

from copy import deepcopy, copy
from sphinx.util.osutil import ensuredir
from docutils.parsers.rst import directives, roles

from .helpers import build_main, write_conf

CASES_ROOT = os.path.join(os.path.dirname(__file__), 'cases')

CASES_DIRS = glob.glob(os.path.join(CASES_ROOT, '*'))

PARALLEL = {False, True}


intersphinx_mapping = {
}

DEFAULT_CONF = {'source_suffix': '.rst',
                'master_doc': 'index',
                'nitpicky': True,
                'extensions': ['sphinx.ext.intersphinx', 'sphinx_automodapi.automodapi'],
                'suppress_warnings': ['app.add_directive', 'app.add_node'],
                'intersphinx_mapping': intersphinx_mapping,
                'nitpick_ignore': [('py:class', 'sphinx_automodapi.tests.example_module.classes.BaseSpam'),
                                   ('py:class', 'sphinx_automodapi.tests.example_module.other_classes.BaseFoo'),
                                   # See the following links for why these classes need to be ignored.
                                   # This only seems to be necessary for Python 2.7.
                                   #
                                   # https://trac.sagemath.org/ticket/19211
                                   # https://stackoverflow.com/q/11417221/3776794
                                   ('py:class', '_abcoll.Sequence'),
                                   ('py:class', '_abcoll.Iterable'),
                                   ('py:class', '_abcoll.Container'),
                                   ('py:class', '_abcoll.Sized')]}


def setup_function(func):
    # This can be replaced with the docutils_namespace context manager once
    # it is in a stable release of Sphinx
    func._directives = copy(directives._directives)
    func._roles = copy(roles._roles)


def teardown_function(func):
    directives._directives = func._directives
    roles._roles = func._roles


@pytest.mark.parametrize(('case_dir', 'parallel'), product(CASES_DIRS, PARALLEL))
def test_run_full_case(tmpdir, case_dir, parallel):

    input_dir = os.path.join(case_dir, 'input')
    output_dir = os.path.join(case_dir, 'output')

    docs_dir = tmpdir.mkdir('docs').strpath

    conf = deepcopy(DEFAULT_CONF)
    conf.update({'automodapi_toctreedirnm': 'api',
                 'automodapi_writereprocessed': True,
                 'automodsumm_writereprocessed': True})

    if os.path.basename(case_dir) in ('mixed_toplevel',
                                      'mixed_toplevel_all_objects',
                                      'allowed_names'):
        conf['extensions'].append('sphinx_automodapi.smart_resolver')

    start_dir = os.path.abspath('.')

    src_dir = 'src' if 'source_dir' in case_dir else '.'

    ensuredir(os.path.join(docs_dir, src_dir))

    write_conf(os.path.join(os.path.join(docs_dir, src_dir), 'conf.py'), conf)

    for root, dirnames, filenames in os.walk(input_dir):
        for filename in filenames:
            root_dir = os.path.join(docs_dir, os.path.relpath(root, input_dir))
            ensuredir(root_dir)
            input_file = os.path.join(root, filename)
            shutil.copy(input_file, root_dir)

    argv = ['-b', 'html', src_dir, '_build/html']
    if parallel:
        argv.insert(0, '-j 4')

    try:
        os.chdir(docs_dir)
        status = build_main(argv=argv)
    finally:
        os.chdir(start_dir)

    assert status == 0

    # Check that all expected output files are there and match the reference files
    for root, dirnames, filenames in os.walk(output_dir):
        for filename in filenames:
            path_reference = os.path.join(root, filename)
            path_relative = os.path.relpath(path_reference, output_dir)
            path_actual = os.path.join(docs_dir, path_relative)
            assert os.path.exists(path_actual)
            with open(path_actual, encoding='utf8') as f:
                actual = f.read()
            with open(path_reference, encoding='utf8') as f:
                reference = f.read()
            assert actual.strip() == reference.strip()


def test_duplicated_warning(tmpdir):
    input_dir = os.path.join(os.path.dirname(__file__), 'duplicated_warning', 'docs')
    docs_dir = tmpdir.mkdir('docs').strpath

    start_dir = os.path.abspath('.')
    src_dir = '.'

    for root, dirnames, filenames in os.walk(input_dir):
        for filename in filenames:
            root_dir = os.path.join(docs_dir, os.path.relpath(root, input_dir))
            ensuredir(root_dir)
            input_file = os.path.join(root, filename)
            shutil.copy(input_file, root_dir)

    argv = ['-W', '-b', 'html', src_dir, '_build/html']

    try:
        os.chdir(docs_dir)
        status = build_main(argv=argv)
    finally:
        os.chdir(start_dir)

    assert status == 0


def test_slots_example():
    """Basic tests for slots example module"""
    from sphinx_automodapi.tests.example_module.slots import (
        SlotDict, DerivedParam, DerivedSlotParam
    )
    SlotDict('param', 'other_param').my_method()
    DerivedParam('param', 'other_param', 'extra_param').derived_from_slot_class_method()
    DerivedSlotParam('param', 'other_param', 'extra_param').derived_from_slot_class_method()