#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
    :copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
    :license: GNU GPL, see LICENSE for more details.
"""

VERSION = (1, 2, 1, 'alpha', 0)

def get_version(version=None):
    """Derives a PEP386-compliant version number from VERSION."""
    # TODO: Get the Version Hash from GIT.
    if version is None:
        version = VERSION
    assert len(version) == 5
    assert version[3] in ('alpha', 'beta', 'rc', 'final')

    # Now build the two parts of the version number:
    # main = X.Y[.Z]
    # sub = .devN - for pre-alpha releases
    #     | {a|b|c}N - for alpha, beta and rc releases

    parts = 2 if version[2] == 0 else 3
    main = '.'.join(str(x) for x in version[:parts])

    sub = ''
    if version[3] == 'alpha' and version[4] == 0:
        sub = '.dev'

    elif version[3] != 'final':
        sub = "-" + version[3] + str(version[4])

    return main + sub