from __future__ import unicode_literals
from __future__ import absolute_import
import os

from .. import unittest
import mock

from fig import Service
from fig.service import (
    ConfigError,
    split_port,
    parse_volume_spec,
    build_volume_binding,
)


class ServiceTest(unittest.TestCase):
    def test_name_validations(self):
        self.assertRaises(ConfigError, lambda: Service(name=''))

        self.assertRaises(ConfigError, lambda: Service(name=' '))
        self.assertRaises(ConfigError, lambda: Service(name='/'))
        self.assertRaises(ConfigError, lambda: Service(name='!'))
        self.assertRaises(ConfigError, lambda: Service(name='\xe2'))
        self.assertRaises(ConfigError, lambda: Service(name='_'))
        self.assertRaises(ConfigError, lambda: Service(name='____'))
        self.assertRaises(ConfigError, lambda: Service(name='foo_bar'))
        self.assertRaises(ConfigError, lambda: Service(name='__foo_bar__'))

        Service('a')
        Service('foo')

    def test_project_validation(self):
        self.assertRaises(ConfigError, lambda: Service(name='foo', project='_'))
        Service(name='foo', project='bar')

    def test_config_validation(self):
        self.assertRaises(ConfigError, lambda: Service(name='foo', port=['8000']))
        Service(name='foo', ports=['8000'])

    def test_split_port(self):
        internal_port, external_port = split_port("127.0.0.1:1000:2000")
        self.assertEqual(internal_port, "2000")
        self.assertEqual(external_port, ("127.0.0.1", "1000"))

        internal_port, external_port = split_port("127.0.0.1:1000:2000/udp")
        self.assertEqual(internal_port, "2000/udp")
        self.assertEqual(external_port, ("127.0.0.1", "1000"))

        internal_port, external_port = split_port("127.0.0.1::2000")
        self.assertEqual(internal_port, "2000")
        self.assertEqual(external_port, ("127.0.0.1",))

        internal_port, external_port = split_port("1000:2000")
        self.assertEqual(internal_port, "2000")
        self.assertEqual(external_port, "1000")

    def test_split_domainname_none(self):
        service = Service('foo',
                hostname = 'name',
            )
        service.next_container_name = lambda x: 'foo'
        opts = service._get_container_create_options({})
        self.assertEqual(opts['hostname'], 'name', 'hostname')
        self.assertFalse('domainname' in opts, 'domainname')

    def test_split_domainname_fqdn(self):
        service = Service('foo',
                hostname = 'name.domain.tld',
            )
        service.next_container_name = lambda x: 'foo'
        opts = service._get_container_create_options({})
        self.assertEqual(opts['hostname'], 'name', 'hostname')
        self.assertEqual(opts['domainname'], 'domain.tld', 'domainname')

    def test_split_domainname_both(self):
        service = Service('foo',
                hostname = 'name',
                domainname = 'domain.tld',
            )
        service.next_container_name = lambda x: 'foo'
        opts = service._get_container_create_options({})
        self.assertEqual(opts['hostname'], 'name', 'hostname')
        self.assertEqual(opts['domainname'], 'domain.tld', 'domainname')

    def test_split_domainname_weird(self):
        service = Service('foo',
                hostname = 'name.sub',
                domainname = 'domain.tld',
            )
        service.next_container_name = lambda x: 'foo'
        opts = service._get_container_create_options({})
        self.assertEqual(opts['hostname'], 'name.sub', 'hostname')
        self.assertEqual(opts['domainname'], 'domain.tld', 'domainname')


class ServiceVolumesTest(unittest.TestCase):

    def test_parse_volume_spec_only_one_path(self):
        spec = parse_volume_spec('/the/volume')
        self.assertEqual(spec, (None, '/the/volume', 'rw'))

    def test_parse_volume_spec_internal_and_external(self):
        spec = parse_volume_spec('external:interval')
        self.assertEqual(spec, ('external', 'interval', 'rw'))

    def test_parse_volume_spec_with_mode(self):
        spec = parse_volume_spec('external:interval:ro')
        self.assertEqual(spec, ('external', 'interval', 'ro'))

    def test_parse_volume_spec_too_many_parts(self):
        with self.assertRaises(ConfigError):
            parse_volume_spec('one:two:three:four')

    def test_parse_volume_bad_mode(self):
        with self.assertRaises(ConfigError):
            parse_volume_spec('one:two:notrw')

    def test_build_volume_binding(self):
        binding = build_volume_binding(parse_volume_spec('/outside:/inside'))
        self.assertEqual(
            binding,
            ('/outside', dict(bind='/inside', ro=False)))

    @mock.patch.dict(os.environ)
    def test_build_volume_binding_with_environ(self):
        os.environ['VOLUME_PATH'] = '/opt'
        binding = build_volume_binding(parse_volume_spec('${VOLUME_PATH}:/opt'))
        self.assertEqual(binding, ('/opt', dict(bind='/opt', ro=False)))

    @mock.patch.dict(os.environ)
    def test_building_volume_binding_with_home(self):
        os.environ['HOME'] = '/home/user'
        binding = build_volume_binding(parse_volume_spec('~:/home/user'))
        self.assertEqual(
            binding,
            ('/home/user', dict(bind='/home/user', ro=False)))