import unittest
import pexpect
import os
import subprocess
from getpass import getuser

TOPDIR = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))


class TestFunctions(unittest.TestCase):

    user = getuser()

    def setUp(self):
        """ spawn lshell with pexpext and return the child """
        self.child = pexpect.spawn('%s/bin/lshell '
                                   '--config %s/etc/lshell.conf --strict 1'
                                   % (TOPDIR, TOPDIR))
        self.child.expect('%s:~\$' % self.user)

    def tearDown(self):
        self.child.close()

    def test_01(self):
        """ 01 - test lshell welcome message """
        expected = "You are in a limited shell.\r\nType '?' or 'help' to get" \
            " the list of allowed commands\r\n"
        result = self.child.before
        self.assertEqual(expected, result)

    def test_02(self):
        """ 02 - get the output of ls """
        p = subprocess.Popen("ls ~",
                             shell=True,
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE)
        cout = p.stdout
        expected = cout.read(-1)
        self.child.sendline('ls')
        self.child.expect('%s:~\$' % self.user)
        output = self.child.before.split('ls\r', 1)[1]
        self.assertEqual(len(expected.strip().split()),
                         len(output.strip().split()))

    def test_03(self):
        """ 03 - echo number """
        expected = "32"
        self.child.sendline('echo 32')
        self.child.expect("%s:~\$" % self.user)
        result = self.child.before.split()[2]
        self.assertEqual(expected, result)

    def test_04(self):
        """ 04 - echo anything """
        expected = "bla blabla  32 blibli! plop."
        self.child.sendline('echo "%s"' % expected)
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1].strip()
        self.assertEqual(expected, result)

    def test_05(self):
        """ 05 - echo $(uptime) """
        expected = "*** forbidden syntax -> \"echo $(uptime)\"\r\n*** You " \
            "have 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('echo $(uptime)')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_06_0(self):
        """ 06.0 - change directory """
        expected = ""
        home = os.path.expanduser('~')
        dirpath = None
        for path in os.listdir(home):
            dirpath = os.path.join(home, path)
            if os.path.isdir(dirpath):
                break
        if dirpath:
            self.child.sendline('cd %s' % path)
            self.child.expect('%s:~/%s\$' % (self.user, path))
            self.child.sendline('cd ..')
            self.child.expect('%s:~\$' % self.user)
            result = self.child.before.split('\n', 1)[1]
            self.assertEqual(expected, result)

    def test_06_1(self):
        """ 06.1 - tilda bug """
        expected = "*** forbidden path -> \"/etc/passwd\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('ls ~/../../etc/passwd')
        self.child.expect("%s:~\$" % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_07(self):
        """ 07 - quotes in cd "/" """
        expected = "*** forbidden path -> \"/\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('ls -ld "/"')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_08(self):
        """ 08 - ls ~root """
        expected = "*** forbidden path -> \"/root/\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('ls ~root')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_09(self):
        """ 09 - cd ~root """
        expected = "*** forbidden path -> \"/root/\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('cd ~root')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_10(self):
        """ 10 - empty variable 'ls "$a"/etc/passwd' """
        expected = "*** forbidden path -> \"/etc/passwd\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('ls "$a"/etc/passwd')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_11(self):
        """ 11 - empty variable 'ls -l .*./.*./etc/passwd' """
        expected = "*** forbidden path -> \"/etc/passwd\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('ls -l .*./.*./etc/passwd')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_12(self):
        """ 12 - empty variable 'ls -l .?/.?/etc/passwd' """
        expected = "*** forbidden path -> \"/etc/passwd\"\r\n*** You have" \
            " 1 warning(s) left, before getting kicked out.\r\nThis " \
            "incident has been reported.\r\n"
        self.child.sendline('ls -l .?/.?/etc/passwd')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.split('\n', 1)[1]
        self.assertEqual(expected, result)

    def test_13(self):
        """ 13 - completion with ~/ """
        p = subprocess.Popen("ls -F ~/",
                             shell=True,
                             stdin=subprocess.PIPE,
                             stdout=subprocess.PIPE)
        cout = p.stdout
        expected = cout.read(-1)
        self.child.sendline('cd ~/\t\t')
        self.child.expect('%s:~\$' % self.user)
        output = self.child.before.split('\n', 1)[1]
        self.assertEqual(len(expected.strip().split()),
                         len(output.strip().split()))

#    def test_14(self):
#        """ 14 - command over ssh """

    def test_15(self):
        """ 15 - tab to list commands """
        expected = '\x07\r\ncd       echo     help     ll       ls       \r\n'\
            'clear    exit     history  lpath    lsudo'
        self.child.sendline('\t\t')
        self.child.expect('%s:~\$' % self.user)
        result = self.child.before.strip()
        self.assertEqual(expected, result)

#    def test_exit(self):
#        expected = ''
#        self.child.sendline('exit')
#        self.child.expect('$')
#        result = self.child.before
#        self.assertEqual(expected, result)


if __name__ == '__main__':
    unittest.main()