from tiramisu.option import BoolOption, UnicodeOption, SymLinkOption, \
    OptionDescription
from pickle import dumps, loads


def _get_slots(opt):
    slots = set()
    for subclass in opt.__class__.__mro__:
        if subclass is not object:
            slots.update(subclass.__slots__)
    return slots


def _no_state(opt):
    for attr in _get_slots(opt):
        if 'state' in attr:
            try:
                getattr(opt, attr)
            except:
                pass
            else:
                raise Exception('opt should have already attribute {0}'.format(attr))


def _diff_opt(opt1, opt2):
    attr1 = set(_get_slots(opt1))
    attr2 = set(_get_slots(opt2))
    diff1 = attr1 - attr2
    diff2 = attr2 - attr1
    if diff1 != set():
        raise Exception('more attribute in opt1 {0}'.format(list(diff1)))
    if diff2 != set():
        raise Exception('more attribute in opt2 {0}'.format(list(diff2)))
    for attr in attr1:
        if attr in ['_cache_paths']:
            continue
        err1 = False
        err2 = False
        val1 = None
        val2 = None
        try:
            val1 = getattr(opt1, attr)
        except:
            err1 = True

        try:
            val2 = getattr(opt2, attr)
        except:
            err2 = True
        assert err1 == err2
        if val1 is None:
            assert val1 == val2
        elif attr == '_children':
            assert val1[0] == val2[0]
            for index, _opt in enumerate(val1[1]):
                assert _opt._name == val2[1][index]._name
        elif attr == '_requires':
            assert val1[0][0][0]._name == val2[0][0][0]._name
            assert val1[0][0][1:] == val2[0][0][1:]
        elif attr == '_opt':
            assert val1._name == val2._name
        elif attr == '_consistencies':
            # dict is only a cache
            if isinstance(val1, list):
                for index, consistency in enumerate(val1):
                    assert consistency[0] == val2[index][0]
                    assert consistency[1]._name == val2[index][1]._name
        else:
            assert val1 == val2


def test_diff_opt():
    b = BoolOption('b', '')
    u = UnicodeOption('u', '', requires=[{'option': b, 'expected': True, 'action': 'disabled', 'inverse': True}])
    #u.impl_add_consistency('not_equal', b)
    s = SymLinkOption('s', u)
    o = OptionDescription('o', '', [b, u, s])
    o1 = OptionDescription('o1', '', [o])

    a = dumps(o1)
    q = loads(a)
    _diff_opt(o1, q)
    _diff_opt(o1.o, q.o)
    _diff_opt(o1.o.b, q.o.b)
    _diff_opt(o1.o.u, q.o.u)
    _diff_opt(o1.o.s, q.o.s)


def test_diff_opt_cache():
    b = BoolOption('b', '')
    u = UnicodeOption('u', '', requires=[{'option': b, 'expected': True, 'action': 'disabled', 'inverse': True}])
    u.impl_add_consistency('not_equal', b)
    s = SymLinkOption('s', u)
    o = OptionDescription('o', '', [b, u, s])
    o1 = OptionDescription('o1', '', [o])
    o1.impl_build_cache()

    a = dumps(o1)
    q = loads(a)
    _diff_opt(o1, q)
    _diff_opt(o1.o, q.o)
    _diff_opt(o1.o.b, q.o.b)
    _diff_opt(o1.o.u, q.o.u)
    _diff_opt(o1.o.s, q.o.s)


def test_no_state_attr():
    # all _state_xxx attributes should be deleted
    b = BoolOption('b', '')
    u = UnicodeOption('u', '', requires=[{'option': b, 'expected': True, 'action': 'disabled', 'inverse': True}])
    s = SymLinkOption('s', u)
    o = OptionDescription('o', '', [b, u, s])
    o1 = OptionDescription('o1', '', [o])

    a = dumps(o1)
    q = loads(a)
    _no_state(q)
    _no_state(q.o)
    _no_state(q.o.b)
    _no_state(q.o.u)
    _no_state(q.o.s)