import os
import unittest

try:
    import mockssh
except ImportError:
    raise unittest.SkipTest("Skipping tests that require mockssh")

from base.ssh_util import generate_ssh_keys

from galaxy.jobs.runners.cli import CliInterface


class TestCliInterface(unittest.TestCase):

    @classmethod
    def tearDownClass(cls):
        os.remove(cls.ssh_keys.private_key_file)
        os.remove(cls.ssh_keys.public_key_file)

    @classmethod
    def setUpClass(cls):
        cls.ssh_keys = generate_ssh_keys()
        cls.username = 'testuser'
        cls.shell_params = {'username': cls.username,
                            'private_key': cls.ssh_keys.private_key_file,
                            'hostname': 'localhost'}
        cls.cli_interface = CliInterface()

    def test_secure_shell_plugin_without_strict(self):
        with mockssh.Server(users={self.username: self.ssh_keys.private_key_file}) as server:
            self.shell_params['port'] = server.port
            self.shell_params['plugin'] = 'SecureShell'
            self.shell_params['strict_host_key_checking'] = False
            self.shell = self.cli_interface.get_shell_plugin(self.shell_params)
            result = self.shell.execute(cmd='echo hello')
        assert result.stdout.strip() == 'hello'

    def test_get_shell_plugin(self):
        with mockssh.Server(users={self.username: self.ssh_keys.private_key_file}) as server:
            self.shell_params['port'] = server.port
            self.shell_params['plugin'] = 'ParamikoShell'
            self.shell = self.cli_interface.get_shell_plugin(self.shell_params)
        assert self.shell.username == self.username

    def test_paramiko_shell_plugin(self):
        with mockssh.Server(users={self.username: self.ssh_keys.private_key_file}) as server:
            self.shell_params['port'] = server.port
            self.shell_params['plugin'] = 'ParamikoShell'
            self.shell = self.cli_interface.get_shell_plugin(self.shell_params)
            result = self.shell.execute(cmd='echo hello')
        assert result.stdout.strip() == 'hello'