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

# Import python libs
from __future__ import absolute_import, print_function, unicode_literals
import os
import errno
import socket
import logging

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

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

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

# Import Salt Testing libs
from tests.support.mock import MagicMock
from tests.support.paths import TMP
from tests.support.unit import skipIf

log = logging.getLogger(__name__)


@skipIf(salt.utils.platform.is_windows(), 'Windows does not support Posix IPC')
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(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 = []
        try:
            self.server_channel.close()
        except socket.error as exc:
            if exc.errno != errno.EBADF:
                # If its not a bad file descriptor error, raise
                raise
        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))
        del self.payloads
        del self.socket_path
        del self.server_channel
        #del self._start_handlers

    @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).tearDown()
        try:
            self.channel.close()
        except socket.error as exc:
            if exc.errno != errno.EBADF:
                # If its not a bad file descriptor error, raise
                raise

    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([six.text_type(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'])