# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2010-2011 OpenStack LLC.
# All Rights Reserved.
#
#    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 ConfigParser
from hashlib import md5
import nose.plugins.skip
import os
import unittest2

NOVA_DATA = {}
GLANCE_DATA = {}
SWIFT_DATA = {}
RABBITMQ_DATA = {}
CONFIG_DATA = {}
KEYSTONE_DATA = {}


class skip_test(object):
    """Decorator that skips a test."""
    def __init__(self, msg):
        self.message = msg

    def __call__(self, func):
        def _skipper(*args, **kw):
            """Wrapped skipper function."""
            raise nose.SkipTest(self.message)
        _skipper.__name__ = func.__name__
        _skipper.__doc__ = func.__doc__
        return _skipper


class skip_if(object):
    """Decorator that skips a test."""
    def __init__(self, condition, msg):
        self.condition = condition
        self.message = msg

    def __call__(self, func):
        def _skipper(*args, **kw):
            """Wrapped skipper function."""
            if self.condition:
                raise nose.SkipTest(self.message)
            func(*args, **kw)
        _skipper.__name__ = func.__name__
        _skipper.__doc__ = func.__doc__
        return _skipper


class skip_unless(object):
    """Decorator that skips a test."""
    def __init__(self, condition, msg):
        self.condition = condition
        self.message = msg

    def __call__(self, func):
        def _skipper(*args, **kw):
            """Wrapped skipper function."""
            if not self.condition:
                raise nose.SkipTest(self.message)
            func(*args, **kw)
        _skipper.__name__ = func.__name__
        _skipper.__doc__ = func.__doc__
        return _skipper


class FunctionalTest(unittest2.TestCase):
    def setUp(self):
        global GLANCE_DATA, NOVA_DATA, SWIFT_DATA, RABBITMQ_DATA
        global KEYSTONE_DATA, CONFIG_DATA
        # Define config dict
        self.config = CONFIG_DATA
        # Define service specific dicts
        self.glance = GLANCE_DATA
        self.nova = NOVA_DATA
        self.swift = SWIFT_DATA
        self.rabbitmq = RABBITMQ_DATA
        self.keystone = KEYSTONE_DATA

        self._parse_defaults_file()

        # Swift Setup
        if 'swift' in self.config:
            self.swift = self.config['swift']
            self.swift['ver'] = 'v1.0'  # need to find a better way to get this

        # Glance Setup
        self.glance = self.config['glance']

        if 'nova' in self.config:
            self.nova = self.config['nova']
            self.nova['ver'] = self.config['nova']['apiver']

        if 'keystone' in self.config:
            self.keystone = self.config['keystone']
            self.keystone['pass'] = self.config['keystone']['password']

    def _md5sum_file(self, path):
        md5sum = md5()
        with open(path, 'rb') as file:
            for chunk in iter(lambda: file.read(8192), ''):
                md5sum.update(chunk)
        return md5sum.hexdigest()

    def _read_in_chunks(self, infile, chunk_size=1024 * 64):
        file_data = open(infile, "rb")
        while True:
            # chunk = file_data.read(chunk_size).encode('base64')
            chunk = file_data.read(chunk_size)
            if chunk:
                yield chunk
            else:
                return
        file_data.close()

    def _parse_defaults_file(self):
        cfg = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                   os.path.pardir, os.path.pardir,
                                   "etc", "config.ini"))
        if os.path.exists(cfg):
            self._build_config(cfg)
        else:
            raise Exception("Cannot read %s" % cfg)

    def _build_config(self, config_file):
        parser = ConfigParser.ConfigParser()
        parser.read(config_file)

        for section in parser.sections():
            self.config[section] = {}
            for value in parser.options(section):
                self.config[section][value] = parser.get(section, value)
                # print "%s = %s" % (value, parser.get(section, value))