#
# Copyright (C) 2018 Red Hat, 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 2 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/>.
#
from io import StringIO
import shutil
import tempfile
import unittest

from pylorax import get_buildarch
from pylorax.api.compose import add_customizations, get_extra_pkgs
from pylorax.api.config import configure, make_dnf_dirs
from pylorax.api.dnfbase import get_base_object
from pylorax.api.recipes import recipe_from_toml

BASE_RECIPE = """name = "test-cases"
description = "Used for testing"
version = "0.0.1"

"""

HOSTNAME = BASE_RECIPE + """[customizations]
hostname = "testhostname"
"""

SSHKEY = BASE_RECIPE + """[[customizations.sshkey]]
user = "root"
key = "ROOT SSH KEY"
"""

USER = BASE_RECIPE + """[[customizations.user]]
name = "tester"
"""

ROOT_USER = BASE_RECIPE + """[[customizations.user]]
name = "root"
"""

USER_KEY = """
key = "A SSH KEY FOR THE USER"
"""

USER_DESC = """
description = "a test user account"
"""

USER_CRYPT = """
password = "$6$CHO2$3rN8eviE2t50lmVyBYihTgVRHcaecmeCk31LeOUleVK/R/aeWVHVZDi26zAH.o0ywBKH9Tc0/wm7sW/q39uyd1"
"""

USER_PLAIN = """
password = "plainpassword"
"""

USER_HOME = """
home = "/opt/users/tester/"
"""

USER_SHELL = """
shell = "/usr/bin/zsh"
"""

USER_UID = """
uid = 1013
"""

USER_GID = """
gid = 4242
"""

USER_GROUPS = """
groups = ["wheel", "users"]
"""

USER_ALL = USER + USER_KEY + USER_DESC + USER_CRYPT + USER_HOME + USER_SHELL + USER_UID + USER_GID

GROUP = BASE_RECIPE + """[[customizations.group]]
name = "testgroup"
"""

GROUP_GID = GROUP + """
gid = 1011
"""

USER_GROUP = USER + """[[customizations.group]]
name = "tester"
"""

KS_USER_ALL = '''sshkey --user tester "A SSH KEY FOR THE USER"
user --name tester --homedir /opt/users/tester/ --iscrypted --password "$6$CHO2$3rN8eviE2t50lmVyBYihTgVRHcaecmeCk31LeOUleVK/R/aeWVHVZDi26zAH.o0ywBKH9Tc0/wm7sW/q39uyd1" --shell /usr/bin/zsh --uid 1013 --gid 4242 --gecos "a test user account"
rootpw --lock
'''

# ROOT TESTS
ROOT_CRYPT = ROOT_USER + USER_CRYPT
ROOT_PLAIN = ROOT_USER + USER_PLAIN
ROOT_CRYPT_KEY = ROOT_USER + USER_CRYPT + USER_KEY
ROOT_PLAIN_KEY = ROOT_USER + USER_PLAIN + USER_KEY
ROOT_KEY = ROOT_USER + USER_KEY

class CustomizationsTestCase(unittest.TestCase):
    def assertCustomization(self, test, result):
        r = recipe_from_toml(test)
        f = StringIO()
        add_customizations(f, r)
        self.assertTrue(result in f.getvalue(), f.getvalue())

    def assertNotCustomization(self, test, result):
        r = recipe_from_toml(test)
        f = StringIO()
        add_customizations(f, r)
        self.assertTrue(result not in f.getvalue(), f.getvalue())

    def test_no_customizations(self):
        """Test not setting any customizations"""
        self.assertCustomization(BASE_RECIPE, "rootpw --lock")

    def test_set_hostname(self):
        """Test setting the hostname"""
        self.assertCustomization(HOSTNAME, "network --hostname=testhostname")
        self.assertCustomization(HOSTNAME, "rootpw --lock")

    def test_set_sshkey(self):
        """Test setting sshkey without user"""
        self.assertCustomization(SSHKEY, 'sshkey --user root "ROOT SSH KEY"')

    def test_sshkey_only(self):
        """Test adding a sshkey to an existing user account"""
        self.assertCustomization(USER + USER_KEY, 'sshkey --user tester "A SSH KEY FOR THE USER"')
        self.assertCustomization(USER + USER_KEY, "rootpw --lock")

    def test_create_user(self):
        """Test creating a user with no options"""
        self.assertCustomization(USER, "user --name tester")
        self.assertCustomization(USER, "rootpw --lock")

    def test_create_user_desc(self):
        """Test creating a user with a description"""
        self.assertCustomization(USER + USER_DESC, '--gecos "a test user account"')
        self.assertCustomization(USER + USER_DESC, "rootpw --lock")

    def test_create_user_crypt(self):
        """Test creating a user with a pre-crypted password"""
        self.assertCustomization(USER + USER_CRYPT, '--password "$6$CHO2$3r')
        self.assertCustomization(USER + USER_CRYPT, "rootpw --lock")

    def test_create_user_plain(self):
        """Test creating a user with a plaintext password"""
        self.assertCustomization(USER + USER_PLAIN, '--password "plainpassword"')
        self.assertCustomization(USER + USER_PLAIN, "rootpw --lock")

    def test_create_user_home(self):
        """Test creating user with a home directory"""
        self.assertCustomization(USER + USER_HOME, "--homedir /opt/users/tester/")
        self.assertCustomization(USER + USER_HOME, "rootpw --lock")

    def test_create_user_shell(self):
        """Test creating user with shell set"""
        self.assertCustomization(USER + USER_SHELL, "--shell /usr/bin/zsh")
        self.assertCustomization(USER + USER_SHELL, "rootpw --lock")

    def test_create_user_uid(self):
        """Test creating user with uid set"""
        self.assertCustomization(USER + USER_UID, "--uid 1013")
        self.assertCustomization(USER + USER_UID, "rootpw --lock")

    def test_create_user_gid(self):
        """Test creating user with gid set"""
        self.assertCustomization(USER + USER_GID, "--gid 4242")
        self.assertCustomization(USER + USER_GID, "rootpw --lock")

    def test_create_user_groups(self):
        """Test creating user with group membership"""
        self.assertCustomization(USER + USER_GROUPS, "--groups wheel,users")
        self.assertCustomization(USER + USER_GROUPS, "rootpw --lock")

    def test_user_same_group(self):
        """Test creating a group with the same name as a user"""

        # Creating a group with the same name should skip the group creation
        self.assertCustomization(USER_GROUP, "user --name tester")
        self.assertNotCustomization(USER_GROUP, "group --name tester")
        self.assertCustomization(USER_GROUP, "rootpw --lock")

    def test_create_user_all(self):
        """Test creating user with all settings"""
        r = recipe_from_toml(USER_ALL)
        f = StringIO()
        add_customizations(f, r)
        self.assertEqual(KS_USER_ALL, f.getvalue())

    def test_create_group(self):
        """Test creating group without gid set"""
        self.assertCustomization(GROUP, "group --name testgroup")
        self.assertCustomization(GROUP, "rootpw --lock")

    def test_create_group_gid(self):
        """Test creating group with gid set"""
        self.assertCustomization(GROUP_GID, "group --name testgroup --gid 1011")
        self.assertCustomization(GROUP_GID, "rootpw --lock")

    def test_root_crypt(self):
        self.assertCustomization(ROOT_CRYPT, 'rootpw --iscrypted "$6$CHO2$3r')
        self.assertNotCustomization(ROOT_CRYPT, "rootpw --lock")

    def test_root_plain(self):
        self.assertCustomization(ROOT_PLAIN, 'rootpw --plaintext "plainpassword"')
        self.assertNotCustomization(ROOT_PLAIN, "rootpw --lock")

    def test_root_crypt_key(self):
        self.assertCustomization(ROOT_CRYPT_KEY, 'rootpw --iscrypted "$6$CHO2$3r')
        self.assertCustomization(ROOT_CRYPT_KEY, 'sshkey --user root "A SSH KEY FOR THE USER"')
        self.assertNotCustomization(ROOT_CRYPT_KEY, "rootpw --lock")

    def test_root_plain_key(self):
        self.assertCustomization(ROOT_PLAIN_KEY, 'rootpw --plaintext "plainpassword"')
        self.assertCustomization(ROOT_PLAIN_KEY, 'sshkey --user root "A SSH KEY FOR THE USER"')
        self.assertNotCustomization(ROOT_PLAIN_KEY, "rootpw --lock")


class ExtraPkgsTest(unittest.TestCase):
    @classmethod
    def setUpClass(self):
        self.tmp_dir = tempfile.mkdtemp(prefix="lorax.test.repo.")
        self.config = configure(root_dir=self.tmp_dir, test_config=True)
        make_dnf_dirs(self.config)
        self.dbo = get_base_object(self.config)

    @classmethod
    def tearDownClass(self):
        shutil.rmtree(self.tmp_dir)

    def test_live_install(self):
        """Check that live-install.tmpl is parsed correctly"""
        # A package for each arch to test for
        arch_pkg = {
            "aarch64":  "shim-aa64",
            "arm":      "grub2-efi-arm-cdboot",
            "armhfp":   "grub2-efi-arm-cdboot",
            "x86_64":   "shim-x64",
            "i386":     "memtest86+",
            "ppc64le":  "powerpc-utils",
            "s390x":    "s390utils-base"
        }

        extra_pkgs = get_extra_pkgs(self.dbo, "./share/", "live-iso")
        self.assertTrue(len(extra_pkgs) > 0)

        # Results depend on arch
        arch = get_buildarch(self.dbo)
        self.assertTrue(arch_pkg[arch] in extra_pkgs)

    def test_other_install(self):
        """Test that non-live doesn't parse live-install.tmpl"""
        extra_pkgs = get_extra_pkgs(self.dbo, "./share/", "qcow2")
        self.assertEqual(extra_pkgs, [])