# This file is part of cloud-init. See LICENSE file for license information.

import re

from cloudinit.distros.parsers.sys_conf import SysConf
from tests.unittests.helpers import TestCase

# Lots of good examples @
# http://content.hccfl.edu/pollock/AUnix1/SysconfigFilesDesc.txt


class TestSysConfHelper(TestCase):
    # This function was added in 2.7, make it work for 2.6
    def assertRegMatches(self, text, regexp):
        regexp = re.compile(regexp)
        self.assertTrue(
            regexp.search(text),
            msg="%s must match %s!" % (text, regexp.pattern),
        )

    def test_parse_no_change(self):
        contents = """# A comment
USESMBAUTH=no
KEYTABLE=/usr/lib/kbd/keytables/us.map
SHORTDATE=$(date +%y:%m:%d:%H:%M)
HOSTNAME=blahblah
NETMASK0=255.255.255.0
# Inline comment
LIST=$LOGROOT/incremental-list
IPV6TO4_ROUTING='eth0-:0004::1/64 eth1-:0005::1/64'
ETHTOOL_OPTS="-K ${DEVICE} tso on; -G ${DEVICE} rx 256 tx 256"
USEMD5=no"""
        conf = SysConf(contents.splitlines())
        self.assertEqual(conf["HOSTNAME"], "blahblah")
        self.assertEqual(conf["SHORTDATE"], "$(date +%y:%m:%d:%H:%M)")
        # Should be unquoted
        self.assertEqual(
            conf["ETHTOOL_OPTS"],
            "-K ${DEVICE} tso on; -G ${DEVICE} rx 256 tx 256",
        )
        self.assertEqual(contents, str(conf))

    def test_parse_shell_vars(self):
        contents = "USESMBAUTH=$XYZ"
        conf = SysConf(contents.splitlines())
        self.assertEqual(contents, str(conf))
        conf = SysConf("")
        conf["B"] = "${ZZ}d apples"
        # Should be quoted
        self.assertEqual('B="${ZZ}d apples"', str(conf))
        conf = SysConf("")
        conf["B"] = "$? d apples"
        self.assertEqual('B="$? d apples"', str(conf))
        contents = 'IPMI_WATCHDOG_OPTIONS="timeout=60"'
        conf = SysConf(contents.splitlines())
        self.assertEqual("IPMI_WATCHDOG_OPTIONS=timeout=60", str(conf))

    def test_parse_adjust(self):
        contents = 'IPV6TO4_ROUTING="eth0-:0004::1/64 eth1-:0005::1/64"'
        conf = SysConf(contents.splitlines())
        # Should be unquoted
        self.assertEqual(
            "eth0-:0004::1/64 eth1-:0005::1/64", conf["IPV6TO4_ROUTING"]
        )
        conf["IPV6TO4_ROUTING"] = "blah \tblah"
        contents2 = str(conf).strip()
        # Should be requoted due to whitespace
        self.assertRegMatches(
            contents2, r"IPV6TO4_ROUTING=[\']blah\s+blah[\']"
        )

    def test_parse_no_adjust_shell(self):
        conf = SysConf("".splitlines())
        conf["B"] = " $(time)"
        contents = str(conf)
        self.assertEqual("B= $(time)", contents)

    def test_parse_empty(self):
        contents = ""
        conf = SysConf(contents.splitlines())
        self.assertEqual("", str(conf).strip())

    def test_parse_add_new(self):
        contents = "BLAH=b"
        conf = SysConf(contents.splitlines())
        conf["Z"] = "d"
        contents = str(conf)
        self.assertIn("Z=d", contents)
        self.assertIn("BLAH=b", contents)


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