"""Synthetic angular fixtures; no birth records or predictive assertions."""
from fractions import Fraction
import math
import pytest
from scripts.kp_system import get_kp_lords

ORDER='Ketu Venus Sun Moon Mars Rahu Jupiter Saturn Mercury'.split()
YEARS=(7,20,6,10,7,18,16,19,17)


def test_every_subsub_boundary_is_left_closed_right_open():
    starts=[]
    for star in range(27):
        start=Fraction(star*40,3)
        for offset in range(9):
            sub=(star+offset)%9;span=Fraction(40*YEARS[sub],360)
            for child_offset in range(9):
                child=(sub+child_offset)%9
                starts.append((float(start),ORDER[sub],ORDER[child]))
                start+=span*YEARS[child]/120
    for i,(angle,sub,child) in enumerate(starts):
        for probe in (angle,math.nextafter(angle,math.inf)):
            actual=get_kp_lords(probe)
            assert (actual['sub_lord'],actual['sub_sub_lord'])==(sub,child)
        if i:
            before=get_kp_lords(math.nextafter(angle,-math.inf))
            assert (before['sub_lord'],before['sub_sub_lord'])==starts[i-1][1:]


def test_quarter_boundaries_and_wrap():
    for i in range(108):
        degree=float(Fraction(10*i,3))
        assert get_kp_lords(degree)['pada']==i%4+1
        if i:assert get_kp_lords(math.nextafter(degree,-math.inf))['pada']==(i-1)%4+1
    assert get_kp_lords(70)['pada']==2
    assert get_kp_lords(360)==get_kp_lords(0)
    assert get_kp_lords(-1)==get_kp_lords(359)


@pytest.mark.parametrize('invalid',[True,None,'70',float('nan'),float('inf'),float('-inf')])
def test_nonfinite_or_nonnumeric_longitude_rejected(invalid):
    with pytest.raises(ValueError):get_kp_lords(invalid)