# coding=utf-8

from python.util import has_token_sequence, string_almost_equal
from server.hints import Hint, HintSequence

id = 189
group = 'introduction'
number = 2
visible = True

solution = '''\
a = float(input('Ocena [Ana]? '))
b = float(input('Ocena [Benjamin]? '))
c = float(input('Ocena [Cilka]? '))
print('Povpre?je:', (a + b + c) / 3)
print('Srednja vrednost:', a + b + c - min(a, b, c) - max( a, b, c))
'''

hint_type = {
    'plan': Hint('plan'),
    'eval_expression': Hint('eval_expression'),
    'name_error': HintSequence('name_error', 4),
    'unsupported_operand': HintSequence('unsupported_operand', 4),
    'error': HintSequence('error', 2),
    'radians': HintSequence('radians', 3),
    'printing': Hint('printing'),
}



def test(python, code):
    # List of inputs: (expression to eval, stdin).
    test_in = [
        (None, '2\n4\n5\n'),
        (None, '1\n1\n4\n'),
        (None, '2\n5\n1\n'),
        (None, '3\n1\n1\n'),
        (None, '5\n1\n5\n'),
    ]

    test_out = [
        [3.67, 4],
        [2, 1],
        [2.67, 2],
        [1.67, 1],
        [3.67, 5]
    ]

    # List of outputs: (expression result, stdout, stderr, exception).
    answers = python(code=code, inputs=test_in, timeout=1.0)
    outputs = [ans[1] for ans in answers]

    n_correct = 0
    for output, c in zip(outputs, test_out):
        if string_almost_equal(output, c[0]) and \
           string_almost_equal(output, c[1]):
            n_correct += 1
    return n_correct, len(test_in)

def hint(python, code):
    # run one test first to see if there are any exceptions
    test_in = [(None, '1\n1\n4\n')]
    answer = python(code=code, inputs=test_in, timeout=1.0)
    exc = answer[0][3]
    # if have an exception!
    if exc:
        if 'NameError' in exc:
            return [{'id':'name_error', 'args': {'message': exc}}]
        elif 'TypeError' in exc:
            return [{'id':'type_error', 'args': {'message': exc}}]
        else:
            return [{'id':'error', 'args': {'message': exc}}]

    # show plan if student is lost
    # a) empty progam
    # b) there is not input (we can do it here, since we have no input hint)
    if not code or (not has_token_sequence(code, ['input'])):
        return [{'id': 'plan'}]

    # Help to compute average (if /3 is not program)
    if not has_token_sequence(code, ['/', '3']):
        return [{'id': 'average'}]

    # If student is not using functions min or max, then he is
    # not computing median in the right way
    if not has_token_sequence(code, ['min']) or \
       not has_token_sequence(code, ['max']):
        return [{'id': 'median'}]

    # program is working correctly for mean but not for median
    if '2' in answer[0][1] and '1' not in answer[0][1]:
        return [{'id': 'median'}]

    # student is not using print function
    if not has_token_sequence(code, ['print']):
        return [{'id' : 'printing'}]

    return None