# -*- coding: utf-8 -*-
#
# Copyright (C) 2014 GNS3 Technologies Inc.
#
# This program 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.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os
from unittest.mock import patch


from gns3server.utils import force_unix_path
from gns3server.utils.images import md5sum, remove_checksum, images_directories, scan_for_images


def test_images_directories(tmpdir):
    path1 = tmpdir / "images1" / "QEMU" / "test1.bin"
    path1.write("1", ensure=True)
    path1 = force_unix_path(str(path1))

    path2 = tmpdir / "images2" / "test2.bin"
    path2.write("1", ensure=True)
    path2 = force_unix_path(str(path2))

    with patch("gns3server.config.Config.get_section_config", return_value={
            "images_path": str(tmpdir / "images1"),
            "additional_images_path": "/tmp/null24564:{}".format(tmpdir / "images2"),
            "local": False}):

        # /tmp/null24564 is ignored because doesn't exists
        res = images_directories("qemu")
        assert res[0] == str(tmpdir / "images1" / "QEMU")
        assert res[1] == str(tmpdir / "images2")
        assert res[2] == str(tmpdir / "images1")
        assert len(res) == 3


def test_md5sum(tmpdir):
    fake_img = str(tmpdir / 'hello载')

    with open(fake_img, 'w+') as f:
        f.write('hello')

    assert md5sum(fake_img) == '5d41402abc4b2a76b9719d911017c592'
    with open(str(tmpdir / 'hello载.md5sum')) as f:
        assert f.read() == '5d41402abc4b2a76b9719d911017c592'


def test_md5sum_existing_digest(tmpdir):
    fake_img = str(tmpdir / 'hello')

    with open(fake_img, 'w+') as f:
        f.write('hello')

    with open(str(tmpdir / 'hello.md5sum'), 'w+') as f:
        f.write('aaaaa02abc4b2a76b9719d911017c592')

    assert md5sum(fake_img) == 'aaaaa02abc4b2a76b9719d911017c592'


def test_md5sum_existing_digest_but_missing_image(tmpdir):
    fake_img = str(tmpdir / 'hello')

    with open(str(tmpdir / 'hello.md5sum'), 'w+') as f:
        f.write('aaaaa02abc4b2a76b9719d911017c592')

    assert md5sum(fake_img) is None


def test_md5sum_none(tmpdir):
    assert md5sum(None) is None


def test_remove_checksum(tmpdir):

    with open(str(tmpdir / 'hello.md5sum'), 'w+') as f:
        f.write('aaaaa02abc4b2a76b9719d911017c592')
    remove_checksum(str(tmpdir / 'hello'))

    assert not os.path.exists(str(tmpdir / 'hello.md5sum'))

    remove_checksum(str(tmpdir / 'not_exists'))


def test_scan_for_images(tmpdir):
    path1 = tmpdir / "images1" / "IOS" / "test1.image"
    path1.write("1", ensure=True)
    path1 = force_unix_path(str(path1))

    path2 = tmpdir / "images2" / "test2.image"
    path2.write("1", ensure=True)
    path2 = force_unix_path(str(path2))

    path3 = tmpdir / "images1" / "IOU" / "test3.bin"
    path3.write("1", ensure=True)
    path3 = force_unix_path(str(path3))

    path4 = tmpdir / "images1" / "QEMU" / "test4.qcow2"
    path4.write("1", ensure=True)
    path4 = force_unix_path(str(path4))

    path5 = tmpdir / "images1" / "QEMU" / "test4.qcow2.md5sum"
    path5.write("1", ensure=True)
    path5 = force_unix_path(str(path5))

    with patch("gns3server.config.Config.get_section_config", return_value={
            "images_path": str(tmpdir / "images1"),
            "additional_images_path": "/tmp/null24564:{}".format(tmpdir / "images2"),
            "local": False}):

        assert scan_for_images("dynamips") == [str(path1), str(path2)]
        assert scan_for_images("iou") == [str(path3)]
        assert scan_for_images("qemu") == [str(path4)]