"""test_extract_odf_links.py - Unit tests for ODF link extraction"""
# Copyright © 2020  Brett Smith
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import io
import sys

import pytest

from pathlib import Path

from . import testutil

from conservancy_beancount.tools import extract_odf_links

SRC_PATH = testutil.test_path('repository/LinksReport.ods')

INCLUDED_FILE_LINKS = {
    Path('/repository/Projects/project-data.yml'),
    Path('Projects/project-data.yml'),
    Path('Projects/Bad Link.txt'),
}

def expected_links(rel_path):
    return frozenset(
        str(path if path.is_absolute() else rel_path / path)
        for path in INCLUDED_FILE_LINKS
    )

def check_output(stdout, sep, rel_path):
    actual = stdout.getvalue().split(sep)
    if actual and not actual[-1]:
        actual.pop()
    expected = expected_links(rel_path)
    assert len(actual) == len(expected)
    assert set(actual) == expected

@pytest.mark.parametrize('arglist,sep', [
    (['-0'], '\0'),
    (['-d', '\\v'], '\v'),
    ([str(SRC_PATH)], '\n'),  # Test that links aren't duplicated
])
def test_extract_file_links(arglist, sep, caplog):
    arglist.append(str(SRC_PATH))
    stdout = io.StringIO()
    stderr = io.StringIO()
    exitcode = extract_odf_links.main(arglist, stdout, stderr)
    assert exitcode == 0
    assert not stderr.getvalue()
    check_output(stdout, sep, SRC_PATH.parent)
    assert caplog.records
    assert any(
        log.levelname == 'WARNING'
        and log.message.endswith('/Bad Link.txt not found')
        for log in caplog.records
    )

@pytest.mark.parametrize('rel_path', [
    Path('/run'),
    Path('/tmp'),
])
def test_extract_relative_to(rel_path):
    arglist = ['--relative', str(rel_path), '-0', '-']
    stdout = io.StringIO()
    stderr = io.StringIO()
    orig_stdin = sys.stdin
    try:
        sys.stdin = SRC_PATH.open('rb')
        exitcode = extract_odf_links.main(arglist, stdout, stderr)
    finally:
        sys.stdin = orig_stdin
    assert exitcode == 0
    assert not stderr.getvalue()
    check_output(stdout, '\0', rel_path)

def test_reading_stdin_requires_relative_to():
    with pytest.raises(SystemExit) as exc_check:
        extract_odf_links.main(['-'])
    assert exc_check.value.args[0] == 2