# Copyright 2015 Confluent Inc.
#
# 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.

from kafkatest.utils import kafkatest_version

from distutils.version import LooseVersion


class KafkaVersion(LooseVersion):
    """Container for kafka versions which makes versions simple to compare.

    distutils.version.LooseVersion (and StrictVersion) has robust comparison and ordering logic.

    Example:

        v10 = KafkaVersion("0.10.0")
        v9 = KafkaVersion("0.9.0.1")
        assert v10 > v9  # assertion passes!
    """
    def __init__(self, version_string):
        self.is_trunk = (version_string.lower() == "trunk")
        if self.is_trunk:
            # Since "trunk" may actually be a branch that is not trunk,
            # use kafkatest_version() for comparison purposes,
            # and track whether we're in "trunk" with a flag
            version_string = kafkatest_version()

            # Drop dev suffix if present
            dev_suffix_index = version_string.find(".dev")
            if dev_suffix_index >= 0:
                version_string = version_string[:dev_suffix_index]

        # Don't use the form super.(...).__init__(...) because
        # LooseVersion is an "old style" python class
        LooseVersion.__init__(self, version_string)

    def __str__(self):
        if self.is_trunk:
            return "trunk"
        else:
            return LooseVersion.__str__(self)


TRUNK = KafkaVersion("trunk")

# 0.8.2.X versions
V_0_8_2_1 = KafkaVersion("0.8.2.1")
V_0_8_2_2 = KafkaVersion("0.8.2.2")
LATEST_0_8_2 = V_0_8_2_2