import random
import datetime as dt

from pycalver import version


def test_current_calver():
    v = version.current_calver()
    assert len(v) == 7
    assert v.startswith("v")
    assert v[1:].isdigit()


def test_bump_beta():
    calver      = version.current_calver()
    cur_version = calver + ".0001-beta"
    assert cur_version < version.incr(cur_version)
    assert version.incr(cur_version).endswith("-beta")
    assert version.incr(cur_version, release="alpha").endswith("-alpha")
    assert version.incr(cur_version, release="final").endswith("0002")


def test_bump_final():
    calver      = version.current_calver()
    cur_version = calver + ".0001"
    assert cur_version < version.incr(cur_version)
    assert version.incr(cur_version, release="alpha").endswith("-alpha")
    assert version.incr(cur_version, release="final").endswith("0002")
    assert version.incr(cur_version).endswith("0002")


def test_bump_future():
    future_date   = dt.datetime.today() + dt.timedelta(days=300)
    future_calver = future_date.strftime("v%Y%m")
    cur_version   = future_calver + ".0001"
    assert cur_version < version.incr(cur_version)


def test_bump_random(monkeypatch):
    cur_date    = dt.date.today()
    cur_version = cur_date.strftime("v%Y%m") + ".0001-dev"

    def _mock_current_calver():
        return cur_date.strftime("v%Y%m")

    monkeypatch.setattr(version, 'current_calver', _mock_current_calver)

    for i in range(1000):
        cur_date += dt.timedelta(days=int((1 + random.random()) ** 10))
        new_version = version.incr(
            cur_version, release=random.choice([None, "alpha", "beta", "rc", 'final'])
        )
        assert cur_version < new_version
        cur_version = new_version