# -*- coding: utf-8 -*-
'''
    :codeauthor: :email:`Mike Place <mp@saltstack.com>`
'''

# Import python libs
from __future__ import absolute_import
import os
import logging

import tornado.gen
import tornado.ioloop
import tornado.testing

import salt.utils
import salt.config
import salt.exceptions
import salt.transport.ipc
import salt.transport.server
import salt.transport.client

import salt.ext.six as six
from salt.ext.six.moves import range

# Import Salt Testing libs
import integration
from salttesting.mock import MagicMock
from salttesting.helpers import ensure_in_syspath

log = logging.getLogger(__name__)

ensure_in_syspath('../')


class BaseIPCReqCase(tornado.testing.AsyncTestCase):
    '''
    Test the req server/client pair
    '''
    def setUp(self):
        super(BaseIPCReqCase, self).setUp()
        self._start_handlers = dict(self.io_loop._handlers)
        self.socket_path = os.path.join(integration.TMP, 'ipc_test.ipc')

        self.server_channel = salt.transport.ipc.IPCMessageServer(
            self.socket_path,
            io_loop=self.io_loop,
            payload_handler=self._handle_payload,
        )
        self.server_channel.start()

        self.payloads = []

    def tearDown(self):
        super(BaseIPCReqCase, self).tearDown()
        failures = []
        self.server_channel.close()
        os.unlink(self.socket_path)
        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))

    @tornado.gen.coroutine
    def _handle_payload(self, payload, reply_func):
        self.payloads.append(payload)
        yield reply_func(payload)
        if isinstance(payload, dict) and payload.get('stop'):
            self.stop()


class IPCMessageClient(BaseIPCReqCase):
    '''
    Test all of the clear msg stuff
    '''

    def _get_channel(self):
        channel = salt.transport.ipc.IPCMessageClient(
            socket_path=self.socket_path,
            io_loop=self.io_loop,
        )
        channel.connect(callback=self.stop)
        self.wait()
        return channel

    def setUp(self):
        super(IPCMessageClient, self).setUp()
        self.channel = self._get_channel()

    def tearDown(self):
        super(IPCMessageClient, self).setUp()
        self.channel.close()

    def test_basic_send(self):
        msg = {'foo': 'bar', 'stop': True}
        self.channel.send(msg)
        self.wait()
        self.assertEqual(self.payloads[0], msg)

    def test_many_send(self):
        msgs = []
        self.server_channel.stream_handler = MagicMock()

        for i in range(0, 1000):
            msgs.append('test_many_send_{0}'.format(i))

        for i in msgs:
            self.channel.send(i)
        self.channel.send({'stop': True})
        self.wait()
        self.assertEqual(self.payloads[:-1], msgs)

    def test_very_big_message(self):
        long_str = ''.join([str(num) for num in range(10**5)])
        msg = {'long_str': long_str, 'stop': True}
        self.channel.send(msg)
        self.wait()
        self.assertEqual(msg, self.payloads[0])

    def test_multistream_sends(self):
        local_channel = self._get_channel()

        for c in (self.channel, local_channel):
            c.send('foo')

        self.channel.send({'stop': True})
        self.wait()
        self.assertEqual(self.payloads[:-1], ['foo', 'foo'])

    def test_multistream_errors(self):
        local_channel = self._get_channel()

        for c in (self.channel, local_channel):
            c.send(None)

        for c in (self.channel, local_channel):
            c.send('foo')

        self.channel.send({'stop': True})
        self.wait()
        self.assertEqual(self.payloads[:-1], [None, None, 'foo', 'foo'])


if __name__ == '__main__':
    from integration import run_tests
    run_tests(IPCMessageClient, needs_daemon=False)