#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2015 Jérémy Bobbio <lunar@debian.org>
# Copyright © 2016-2017, 2020, 2024 Chris Lamb <lamby@debian.org>
#
# diffoscope is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# diffoscope 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with diffoscope.  If not, see <https://www.gnu.org/licenses/>.

import shutil
import subprocess
import pytest

from diffoscope.comparators.xz import XzFile
from diffoscope.comparators.binary import FilesystemFile
from diffoscope.comparators.utils.specialize import specialize

from ..utils.data import load_fixture, assert_diff
from ..utils.tools import skip_unless_tools_exist, skip_unless_tool_is_at_least
from ..utils.nonexisting import assert_non_existing

xz1 = load_fixture("test1.xz")
xz2 = load_fixture("test2.xz")
xz3 = load_fixture("test3.xz")
xz4 = load_fixture("test4.xz")


def xz_version():
    try:
        out = subprocess.check_output(["xz", "--version"])
    except subprocess.CalledProcessError as e:
        out = e.output
    return out.decode("UTF-8").split()[3].strip()


def test_identification(xz1):
    assert isinstance(xz1, XzFile)


def test_no_differences(xz1):
    difference = xz1.compare(xz1)
    assert difference is None


@pytest.fixture
def differences(xz1, xz2):
    return xz1.compare(xz2).details


@skip_unless_tools_exist("xz")
def test_content_source(differences):
    assert differences[0].source1 == "test1"
    assert differences[0].source2 == "test2"


@skip_unless_tools_exist("xz")
def test_content_source_without_extension(tmpdir, xz1, xz2):
    path1 = str(tmpdir.join("test1"))
    path2 = str(tmpdir.join("test2"))
    shutil.copy(xz1.path, path1)
    shutil.copy(xz2.path, path2)
    xz1 = specialize(FilesystemFile(path1))
    xz2 = specialize(FilesystemFile(path2))
    difference = xz1.compare(xz2).details
    assert difference[0].source1 == "test1-content"
    assert difference[0].source2 == "test2-content"


@skip_unless_tools_exist("xz")
def test_content_diff(differences):
    assert_diff(differences[0], "text_ascii_expected_diff")


@skip_unless_tools_exist("xz")
def test_compare_non_existing(monkeypatch, xz1):
    assert_non_existing(monkeypatch, xz1)


@pytest.fixture
def differences_verbose(xz3, xz4):
    return xz3.compare(xz4).details


@skip_unless_tools_exist("xz")
@skip_unless_tool_is_at_least("xz", xz_version, "5.4.1")
def test_content_source_verbose(differences_verbose):
    assert differences_verbose[0].source1 == "xz --list"
    assert differences_verbose[0].source2 == "xz --list"
    assert_diff(differences_verbose[0], "text_xz_list")