# Copyright (c) 2010-2011 OpenStack, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import cPickle as pickle
import json
import os
import unittest
from gzip import GzipFile
from shutil import rmtree
from time import time

from eventlet import spawn, TimeoutError, listen
from eventlet.timeout import Timeout

from swift.obj import updater as object_updater, server as object_server
from swift.common.ring import RingData
from swift.common import utils
from swift.common.utils import hash_path, normalize_timestamp, mkdirs


class TestObjectUpdater(unittest.TestCase):

    def setUp(self):
        utils.HASH_PATH_SUFFIX = 'endcap'
        self.testdir = os.path.join(os.path.dirname(__file__),
                        'object_updater')
        rmtree(self.testdir, ignore_errors=1)
        os.mkdir(self.testdir)
        pickle.dump(RingData([[0, 1, 0, 1], [1, 0, 1, 0]],
            [{'id': 0, 'ip': '127.0.0.1', 'port': 1, 'device': 'sda1',
              'zone': 0},
             {'id': 1, 'ip': '127.0.0.1', 'port': 1, 'device': 'sda1',
              'zone': 2}], 30),
            GzipFile(os.path.join(self.testdir, 'container.ring.gz'), 'wb'))
        self.devices_dir = os.path.join(self.testdir, 'devices')
        os.mkdir(self.devices_dir)
        self.sda1 = os.path.join(self.devices_dir, 'sda1')
        os.mkdir(self.sda1)
        os.mkdir(os.path.join(self.sda1,'tmp'))

    def tearDown(self):
        rmtree(self.testdir, ignore_errors=1)

    def test_creation(self):
        cu = object_updater.ObjectUpdater({
            'devices': self.devices_dir,
            'mount_check': 'false',
            'swift_dir': self.testdir,
            'interval': '1',
            'concurrency': '2',
            'node_timeout': '5',
            })
        self.assert_(hasattr(cu, 'logger'))
        self.assert_(cu.logger is not None)
        self.assertEquals(cu.devices, self.devices_dir)
        self.assertEquals(cu.interval, 1)
        self.assertEquals(cu.concurrency, 2)
        self.assertEquals(cu.node_timeout, 5)
        self.assert_(cu.get_container_ring() is not None)

    def test_run_once(self):
        cu = object_updater.ObjectUpdater({
            'devices': self.devices_dir,
            'mount_check': 'false',
            'swift_dir': self.testdir,
            'interval': '1',
            'concurrency': '1',
            'node_timeout': '15',
            })
        cu.run_once()
        async_dir = os.path.join(self.sda1, object_server.ASYNCDIR)
        os.mkdir(async_dir)
        cu.run_once()
        self.assert_(os.path.exists(async_dir))

        odd_dir = os.path.join(async_dir, 'not really supposed to be here')
        os.mkdir(odd_dir)
        cu.run_once()
        self.assert_(os.path.exists(async_dir))
        self.assert_(not os.path.exists(odd_dir))

        ohash = hash_path('a', 'c', 'o')
        odir = os.path.join(async_dir, ohash[-3:])
        mkdirs(odir)
        op_path = os.path.join(odir,
            '%s-%s' % (ohash, normalize_timestamp(time())))
        pickle.dump({'op': 'PUT', 'account': 'a', 'container': 'c', 'obj': 'o',
            'headers': {'X-Container-Timestamp': normalize_timestamp(0)}},
            open(op_path, 'wb'))
        cu.run_once()
        self.assert_(os.path.exists(op_path))

        bindsock = listen(('127.0.0.1', 0))
        def accepter(sock, return_code):
            try:
                with Timeout(3):
                    inc = sock.makefile('rb')
                    out = sock.makefile('wb')
                    out.write('HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n' %
                              return_code)
                    out.flush()
                    self.assertEquals(inc.readline(),
                                      'PUT /sda1/0/a/c/o HTTP/1.1\r\n')
                    headers = {}
                    line = inc.readline()
                    while line and line != '\r\n':
                        headers[line.split(':')[0].lower()] = \
                            line.split(':')[1].strip()
                        line = inc.readline()
                    self.assert_('x-container-timestamp' in headers)
            except BaseException, err:
                return err
            return None
        def accept(return_codes):
            codes = iter(return_codes)
            try:
                events = []
                for x in xrange(len(return_codes)):
                    with Timeout(3):
                        sock, addr = bindsock.accept()
                        events.append(
                            spawn(accepter, sock, codes.next()))
                for event in events:
                    err = event.wait()
                    if err:
                        raise err
            except BaseException, err:
                return err
            return None
        event = spawn(accept, [201,500])
        for dev in cu.get_container_ring().devs:
            if dev is not None:
                dev['port'] = bindsock.getsockname()[1]
        cu.run_once()
        err = event.wait()
        if err:
            raise err
        self.assert_(os.path.exists(op_path))
        event = spawn(accept, [201])
        cu.run_once()
        err = event.wait()
        if err:
            raise err
        self.assert_(not os.path.exists(op_path))

if __name__ == '__main__':
    unittest.main()