# -*- coding: utf-8 -*-
'''
    :codeauthor: :email:`Thomas Jackson <jacksontj.89@gmail.com>`
'''

# Import python libs
from __future__ import absolute_import
import threading

import tornado.gen
import tornado.ioloop
from tornado.testing import AsyncTestCase

import salt.config
import salt.ext.six as six
import salt.utils
import salt.transport.server
import salt.transport.client
import salt.exceptions

# Import Salt Testing libs
from tests.support.unit import TestCase, skipIf
from tests.support.helpers import get_unused_localhost_port
from tests.support.mixins import AdaptedConfigurationTestCaseMixin
from tests.unit.transport.mixins import PubChannelMixin, ReqChannelMixin


class BaseTCPReqCase(TestCase, AdaptedConfigurationTestCaseMixin):
    '''
    Test the req server/client pair
    '''
    @classmethod
    def setUpClass(cls):
        if not hasattr(cls, '_handle_payload'):
            return
        ret_port = get_unused_localhost_port()
        publish_port = get_unused_localhost_port()
        tcp_master_pub_port = get_unused_localhost_port()
        tcp_master_pull_port = get_unused_localhost_port()
        tcp_master_publish_pull = get_unused_localhost_port()
        tcp_master_workers = get_unused_localhost_port()
        cls.master_config = cls.get_temp_config(
            'master',
            **{'transport': 'tcp',
               'auto_accept': True,
               'ret_port': ret_port,
               'publish_port': publish_port,
               'tcp_master_pub_port': tcp_master_pub_port,
               'tcp_master_pull_port': tcp_master_pull_port,
               'tcp_master_publish_pull': tcp_master_publish_pull,
               'tcp_master_workers': tcp_master_workers}
        )

        cls.minion_config = cls.get_temp_config(
            'minion',
            **{'transport': 'tcp',
               'master_ip': '127.0.0.1',
               'master_port': ret_port,
               'master_uri': 'tcp://127.0.0.1:{0}'.format(ret_port)}
        )

        cls.process_manager = salt.utils.process.ProcessManager(name='ReqServer_ProcessManager')

        cls.server_channel = salt.transport.server.ReqServerChannel.factory(cls.master_config)
        cls.server_channel.pre_fork(cls.process_manager)

        cls.io_loop = tornado.ioloop.IOLoop()
        cls.io_loop.make_current()
        cls.server_channel.post_fork(cls._handle_payload, io_loop=cls.io_loop)

        cls.server_thread = threading.Thread(target=cls.io_loop.start)
        cls.server_thread.daemon = True
        cls.server_thread.start()

    @classmethod
    def tearDownClass(cls):
        if not hasattr(cls, '_handle_payload'):
            return
        if hasattr(cls, 'io_loop'):
            cls.io_loop.add_callback(cls.io_loop.stop)
            cls.server_thread.join()
            cls.process_manager.kill_children()
            cls.server_channel.close()
            del cls.server_channel

    @classmethod
    @tornado.gen.coroutine
    def _handle_payload(cls, payload):
        '''
        TODO: something besides echo
        '''
        raise tornado.gen.Return((payload, {'fun': 'send_clear'}))


@skipIf(salt.utils.is_darwin(), 'hanging test suite on MacOS')
class ClearReqTestCases(BaseTCPReqCase, ReqChannelMixin):
    '''
    Test all of the clear msg stuff
    '''
    def setUp(self):
        self.channel = salt.transport.client.ReqChannel.factory(self.minion_config, crypt='clear')

    def tearDown(self):
        del self.channel

    @classmethod
    @tornado.gen.coroutine
    def _handle_payload(cls, payload):
        '''
        TODO: something besides echo
        '''
        raise tornado.gen.Return((payload, {'fun': 'send_clear'}))


@skipIf(salt.utils.is_darwin(), 'hanging test suite on MacOS')
class AESReqTestCases(BaseTCPReqCase, ReqChannelMixin):
    def setUp(self):
        self.channel = salt.transport.client.ReqChannel.factory(self.minion_config)

    def tearDown(self):
        del self.channel

    @classmethod
    @tornado.gen.coroutine
    def _handle_payload(cls, payload):
        '''
        TODO: something besides echo
        '''
        raise tornado.gen.Return((payload, {'fun': 'send'}))

    # TODO: make failed returns have a specific framing so we can raise the same exception
    # on encrypted channels
    def test_badload(self):
        '''
        Test a variety of bad requests, make sure that we get some sort of error
        '''
        msgs = ['', [], tuple()]
        for msg in msgs:
            with self.assertRaises(salt.exceptions.AuthenticationError):
                ret = self.channel.send(msg)


class BaseTCPPubCase(AsyncTestCase, AdaptedConfigurationTestCaseMixin):
    '''
    Test the req server/client pair
    '''
    @classmethod
    def setUpClass(cls):
        ret_port = get_unused_localhost_port()
        publish_port = get_unused_localhost_port()
        tcp_master_pub_port = get_unused_localhost_port()
        tcp_master_pull_port = get_unused_localhost_port()
        tcp_master_publish_pull = get_unused_localhost_port()
        tcp_master_workers = get_unused_localhost_port()
        cls.master_config = cls.get_temp_config(
            'master',
            **{'transport': 'tcp',
               'auto_accept': True,
               'ret_port': ret_port,
               'publish_port': publish_port,
               'tcp_master_pub_port': tcp_master_pub_port,
               'tcp_master_pull_port': tcp_master_pull_port,
               'tcp_master_publish_pull': tcp_master_publish_pull,
               'tcp_master_workers': tcp_master_workers}
        )

        cls.minion_config = cls.get_temp_config(
            'minion',
            **{'transport': 'tcp',
               'master_ip': '127.0.0.1',
               'auth_timeout': 1,
               'master_port': ret_port,
               'master_uri': 'tcp://127.0.0.1:{0}'.format(ret_port)}
        )

        cls.process_manager = salt.utils.process.ProcessManager(name='ReqServer_ProcessManager')

        cls.server_channel = salt.transport.server.PubServerChannel.factory(cls.master_config)
        cls.server_channel.pre_fork(cls.process_manager)

        # we also require req server for auth
        cls.req_server_channel = salt.transport.server.ReqServerChannel.factory(cls.master_config)
        cls.req_server_channel.pre_fork(cls.process_manager)

        cls._server_io_loop = tornado.ioloop.IOLoop()
        cls.req_server_channel.post_fork(cls._handle_payload, io_loop=cls._server_io_loop)

        cls.server_thread = threading.Thread(target=cls._server_io_loop.start)
        cls.server_thread.start()

    @classmethod
    def _handle_payload(cls, payload):
        '''
        TODO: something besides echo
        '''
        return payload, {'fun': 'send_clear'}

    @classmethod
    def tearDownClass(cls):
        cls._server_io_loop.add_callback(cls._server_io_loop.stop)
        cls.server_thread.join()
        cls.process_manager.kill_children()
        cls.req_server_channel.close()
        del cls.req_server_channel

    def setUp(self):
        super(BaseTCPPubCase, self).setUp()
        self._start_handlers = dict(self.io_loop._handlers)

    def tearDown(self):
        super(BaseTCPPubCase, self).tearDown()
        failures = []
        for k, v in six.iteritems(self.io_loop._handlers):
            if self._start_handlers.get(k) != v:
                failures.append((k, v))
        if len(failures) > 0:
            raise Exception('FDs still attached to the IOLoop: {0}'.format(failures))
        del self.channel
        del self._start_handlers


@skipIf(True, 'Skip until we can devote time to fix this test')
class AsyncPubChannelTest(BaseTCPPubCase, PubChannelMixin):
    '''
    Tests around the publish system
    '''