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# Copyright 2013 GRNET S.A. All rights reserved.

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from mock import patch, call

from unittest import makeSuite, TestSuite, TextTestRunner, TestCase

from time import sleep

from inspect import getmembers, isclass

from itertools import product

from random import randint

from kamaki.clients.connection.test import (

    KamakiConnection,

    KamakiHTTPConnection,

    KamakiResponse,

    KamakiHTTPResponse)

from kamaki.clients.utils.test import Utils

from kamaki.clients.astakos.test import Astakos

from kamaki.clients.compute.test import Compute, ComputeRest

from kamaki.clients.cyclades.test import Cyclades, CycladesRest

from kamaki.clients.image.test import Image

from kamaki.clients.storage.test import Storage

from kamaki.clients.pithos.test import Pithos, PithosRest

class ClientError(TestCase):

    def test___init__(self):

        from kamaki.clients import ClientError

        for msg, status, details, exp_msg, exp_status, exp_details in (

                ('some msg', 42, 0.28, 0, 0, 0),

                ('some msg', 'fail', [], 0, 0, 0),

                ('some msg', 42, 'details on error', 0, 0, 0),

                (

                    '404 {"ExampleError":'

                    ' {"message": "a msg", "code": 42, "details": "dets"}}',

                    404,

                    0,

                    '404 ExampleError (a msg)\n',

                    42,

                    ['dets']),

                (

                    '404 {"ExampleError":'

                    ' {"message": "a msg", "code": 42}}',

                    404,

                    'details on error',

                    '404 ExampleError (a msg)\n',

                    42,

                    0),

                (

                    '404 {"ExampleError":'

                    ' {"details": "Explain your error"}}',

                    404,

                    'details on error',

                    '404 ExampleError',

                    0,

                    ['details on error', 'Explain your error']),

                ('some msg\n', -10, ['details', 'on', 'error'], 0, 0, 0)):

            ce = ClientError(msg, status, details)

            exp_msg = exp_msg or (msg if msg.endswith('\n') else msg + '\n')

            exp_status = exp_status or status

            exp_details = exp_details or details

            self.assertEqual('%s' % ce, exp_msg)

            self.assertEqual(

                exp_status if isinstance(exp_status, int) else 0,

                ce.status)

            self.assertEqual(exp_details, ce.details)

class SilentEvent(TestCase):

    def thread_content(self, methodid, raiseException=0):

        wait = 0.1

        self.can_finish = -1

        while self.can_finish < methodid and wait < 4:

            sleep(wait)

            wait = 2 * wait

        if raiseException and raiseException == methodid:

            raise Exception('Some exception')

        self._value = methodid

        self.assertTrue(wait < 4)

    def setUp(self):

        from kamaki.clients import SilentEvent

        self.SE = SilentEvent

    def test_run(self):

        threads = [self.SE(self.thread_content, i) for i in range(4)]

        for t in threads:

            t.start()

        for i in range(4):

            self.assertTrue(threads[i].is_alive())

            self.can_finish = i

            threads[i].join()

            self.assertFalse(threads[i].is_alive())

    def test_value(self):

        threads = [self.SE(self.thread_content, i) for i in range(4)]

        for t in threads:

            t.start()

        for mid, t in enumerate(threads):

            if t.is_alive():

                self.can_finish = mid

                continue

            self.assertTrue(mid, t.value)

    def test_exception(self):

        threads = [self.SE(self.thread_content, i, (i % 2)) for i in range(4)]

        for t in threads:

            t.start()

        for i, t in enumerate(threads):

            if t.is_alive():

                self.can_finish = i

                continue

            if i % 2:

                self.assertTrue(isinstance(t.exception, Exception))

            else:

                self.assertFalse(t.exception)

class FakeConnection(object):

    """A fake Connection class"""

    def __init__(self):

        pass

    def set_header(self, name, value):

        pass

    def set_param(self, name, value):

        pass

class FR(object):

    json = None

    text = None

    headers = {}

    content = json

    status = None

    status_code = 200

    def release(self):

        pass

class Client(TestCase):

    def assert_dicts_are_equal(self, d1, d2):

        for k, v in d1.items():

            self.assertTrue(k in d2)

            if isinstance(v, dict):

                self.assert_dicts_are_equal(v, d2[k])

            else:

                self.assertEqual(unicode(v), unicode(d2[k]))

    def setUp(self):

        from kamaki.clients import Client

        from kamaki.clients import ClientError as CE

        self.base_url = 'http://example.com'

        self.token = 's0m370k3n=='

        self.client = Client(self.base_url, self.token, FakeConnection())

        self.CE = CE

    def tearDown(self):

        FR.text = None

        FR.status = None

        FR.status_code = 200

    def test___init__(self):

        self.assertEqual(self.client.base_url, self.base_url)

        self.assertEqual(self.client.token, self.token)

        self.assert_dicts_are_equal(self.client.headers, {})

        DATE_FORMATS = [

            '%a %b %d %H:%M:%S %Y',

            '%A, %d-%b-%y %H:%M:%S GMT',

            '%a, %d %b %Y %H:%M:%S GMT']

        self.assertEqual(self.client.DATE_FORMATS, DATE_FORMATS)

        self.assertTrue(isinstance(self.client.http_client, FakeConnection))

    def test__init_thread_limit(self):

        exp = 'Nothing set here'

        for faulty in (-1, 0.5, 'a string', {}):

            self.assertRaises(

                AssertionError,

                self.client._init_thread_limit,

                faulty)

            self.assertEqual(exp, getattr(self.client, '_thread_limit', exp))

            self.assertEqual(exp, getattr(self.client, '_elapsed_old', exp))

            self.assertEqual(exp, getattr(self.client, '_elapsed_new', exp))

        self.client._init_thread_limit(42)

        self.assertEqual(42, self.client._thread_limit)

        self.assertEqual(0.0, self.client._elapsed_old)

        self.assertEqual(0.0, self.client._elapsed_new)

    def test__watch_thread_limit(self):

        waits = (

            dict(args=((0.1, 1), (0.1, 2), (0.2, 1), (0.7, 1), (0.3, 2))),

            dict(args=((1.0 - (i / 10.0), (i + 1)) for i in range(7))),

            dict(max=1, args=tuple([(randint(1, 10) / 3.0, 1), ] * 10)),

            dict(

                limit=5,

                args=tuple([

                    (1.0 + (i / 10.0), (5 - i - 1)) for i in range(4)] + [

                    (2.0, 1), (1.9, 2), (2.0, 1), (2.0, 2)])),

            dict(args=tuple(

                [(1.0 - (i / 10.0), (i + 1)) for i in range(7)] + [

                (0.1, 7), (0.2, 6), (0.4, 5), (0.3, 6), (0.2, 7), (0.1, 7)])),)

        for wait_dict in waits:

            if 'max' in wait_dict:

                self.client.MAX_THREADS = wait_dict['max']

            else:

                self.client.MAX_THREADS = 7

            if 'limit' in wait_dict:

                self.client._init_thread_limit(wait_dict['limit'])

            else:

                self.client._init_thread_limit()

                self.client._watch_thread_limit(list())

                self.assertEqual(1, self.client._thread_limit)

            for wait, exp_limit in wait_dict['args']:

                self.client._elapsed_new = wait

                self.client._watch_thread_limit(list())

                self.assertEqual(exp_limit, self.client._thread_limit)

    def test__raise_for_status(self):

        r = FR()

        for txt, sts_code, sts in (('err msg', 10, None), ('', 42, 'Err St')):

            r.text, r.status_code, r.status = txt, sts_code, sts

            try:

                self.client._raise_for_status(r)

            except self.CE as ce:

                self.assertEqual('%s' % ce, '%s %s\n' % (sts or '', txt))

                self.assertEqual(ce.status, sts_code)

        for msg, sts_code in (('err msg', 32), ('', 42), ('an err', None)):

            err = self.CE(msg, sts_code) if sts_code else Exception(msg)

            try:

                self.client._raise_for_status(err)

            except self.CE as ce:

                self.assertEqual('%s' % ce, '%s %s\n' % (sts_code or '', msg))

                self.assertEqual(ce.status, sts_code or 0)

    @patch('%s.FakeConnection.set_header' % __name__)

    def test_set_header(self, SH):

        num_of_calls = 0

        for name, value, condition in product(

                ('n4m3', '', None),

                ('v41u3', None, 42),

                (True, False, None, 1, '')):

            self.client.set_header(name, value, iff=condition)

            if value is not None and condition:

                self.assertEqual(SH.mock_calls[-1], call(name, value))

                num_of_calls += 1

            else:

                self.assertEqual(num_of_calls, len(SH.mock_calls))

    @patch('%s.FakeConnection.set_param' % __name__)

    def test_set_param(self, SP):

        num_of_calls = 0

        for name, value, condition in product(

                ('n4m3', '', None),

                ('v41u3', None, 42),

                (True, False, None, 1, '')):

            self.client.set_param(name, value, iff=condition)

            if condition:

                self.assertEqual(SP.mock_calls[-1], call(name, value))

                num_of_calls += 1

            else:

                self.assertEqual(num_of_calls, len(SP.mock_calls))

#  TestCase auxiliary methods

def runTestCase(cls, test_name, args=[], failure_collector=[]):

    """

    :param cls: (TestCase) a set of Tests

    :param test_name: (str)

    :param args: (list) these are prefixed with test_ and used as params when

        instantiating cls

    :param failure_collector: (list) collects info of test failures

    :returns: (int) total # of run tests

    """

    suite = TestSuite()

    if args:

        suite.addTest(cls('_'.join(['test'] + args)))

    else:

        suite.addTest(makeSuite(cls))

    print('* Test * %s *' % test_name)

    r = TextTestRunner(verbosity=2).run(suite)

    failure_collector += r.failures

    return r.testsRun

def _add_value(foo, value):

    def wrap(self):

        return foo(self, value)

    return wrap

def get_test_classes(module=__import__(__name__), name=''):

    module_stack = [module]

    while module_stack:

        module = module_stack[-1]

        module_stack = module_stack[:-1]

        for objname, obj in getmembers(module):

            if (objname == name or not name):

                if isclass(obj) and objname != 'TestCase' and (

                        issubclass(obj, TestCase)):

                    yield (obj, objname)

def main(argv):

    found = False

    failure_collector = list()

    num_of_tests = 0

    for cls, name in get_test_classes(name=argv[1] if len(argv) > 1 else ''):

        found = True

        num_of_tests += runTestCase(cls, name, argv[2:], failure_collector)

    if not found:

        print('Test "%s" not found' % ' '.join(argv[1:]))

    else:

        for i, failure in enumerate(failure_collector):

            print('Failure %s: ' % (i + 1))

            for field in failure:

                print('\t%s' % field)

        print('\nTotal tests run: %s' % num_of_tests)

        print('Total failures: %s' % len(failure_collector))

if __name__ == '__main__':

    from sys import argv

    main(argv)