import re
from python.util import has_token_sequence, string_almost_equal, \
    string_contains_number, get_tokens, get_numbers, get_exception_desc, \
    all_tokens, has_comprehension, has_loop, almost_equal, get_ast
from server.hints import Hint

id = 20805
number = 5
visible = True
facts = 'family_tree'

solution = '''\
def pathto(fr, to):
    if fr == to:
        return [fr]
    for c in children[fr]:
        d = pathto(c, to)
        if d is not None:
            return [fr] + d
'''

hint_type = {
    'final_hint': Hint('final_hint')
}

def test(python, code, aux_code=''):
    func_name = 'pathto'
    tokens = get_tokens(code)
    if not has_token_sequence(tokens, ['def', func_name]):
        return False, [{'id' : 'no_func_name', 'args' : {'func_name' : func_name}}]

    in_out = [
        (('Hans', 'Hans'), ['Hans']),
        (('Daniel', 'Hans'), ['Daniel', 'Hans']),
        (('Adam', 'Hans'), ['Adam', 'Daniel', 'Hans']),
        (('Adam', 'Franc'), ['Adam', 'Daniel', 'Elizabeta', 'Jurij', 'Franc']),
        (('Adam', 'Petra'), ['Adam', 'Daniel', 'Elizabeta', 'Jurij', 'Jožef', 'Petra']),
        (('Elizabeta', 'Aleksander'), ['Elizabeta', 'Jurij', 'Jožef', 'Aleksander']),
        (('Adam', 'Tadeja'), ['Adam', 'Matjaž', 'Viljem', 'Tadeja']),
        (('Daniel', 'Ludvik'), ['Daniel', 'Elizabeta', 'Ludvik'])
    ]

    test_in = [('{0}{1}'.format(func_name, str(l[0])), None)
               for l in in_out]
    test_out = [l[1] for l in in_out]

    answers = python(code=aux_code+code, inputs=test_in, timeout=1.0)
    n_correct = 0
    tin, tout = None, None
    for i, (ans, to) in enumerate(zip(answers, test_out)):
        res = ans[0]
        corr = res == to
        n_correct += corr
        if not corr:
            tin = test_in[i][0]
            tout = to

    passed = n_correct == len(test_in)
    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_in)}}]
    if tin:
        hints.append({'id': 'problematic_test_case', 'args': {'testin': str(tin), 'testout': str(tout)}})
    if passed:
        hints.append({'id': 'final_hint'})

    return passed, hints


def hint(python, code, aux_code=''):
    tokens = get_tokens(code)

    # run one test first to see if there are any exceptions
    answer = python(code=aux_code+code, inputs=[(None, None)], timeout=1.0)
    exc = get_exception_desc(answer[0][3])
    if exc: return exc

    return None