import re
from python.util import has_token_sequence, string_almost_equal, \
    string_contains_number, get_tokens, get_numbers, get_exception_desc
from server.hints import Hint

id = 20601
number = 7
visible = True

solution = '''\
def family_tree(family):
    tree = {}
    for parent, child in family:
        if parent not in tree:
            tree[parent] = []
        tree[parent].append(child)
    return tree
'''

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

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


    tree = {
            'alice': ['mary', 'tom', 'judy'],
            'bob': ['mary', 'tom', 'judy'],
            'ken': ['suzan'],
            'renee': ['rob', 'bob'],
            'rob': ['jim'],
            'sid': ['rob', 'bob'],
            'tom': ['ken']}
    in_out = [
        ([('bob', 'mary')], {'bob':['mary']}),
        ([('bob', 'mary'), ('bob', 'tom')], {'bob':['mary','tom']}),
        ([], {}),
        ([('bob','mary'),('mary','ken'),('alice','mary')], 
         {'bob':['mary'], 'mary':['ken'], 'alice':['mary']}),
        ([('bob','mary'), ('bob', 'tom'), ('bob', 'judy'), ('alice', 'mary'),
          ('alice', 'tom'), ('alice', 'judy'),('renee', 'rob'), ('renee', 'bob'),
          ('sid', 'rob'), ('sid', 'bob'),('tom', 'ken'), ('ken', 'suzan'),
          ('rob', 'jim')],tree)
    ]

    test_in = [(func_name+'(%s)'%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)):
        n_correct += dict(ans[0]) == to
        if dict(ans[0]) != to:
            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