#!/usr/bin/env python
import sys
import traceback
import os
from os.path import join
import importlib

# local imports
from code_evaluator import CodeEvaluator, TimeoutException


class PythonAssertionEvaluator(CodeEvaluator):
    """Tests the Python code obtained from Code Server"""

    def compile_code(self, user_answer, test_case):
        if hasattr(self, 'g'):
            return None
        else:
            submitted = compile(user_answer, '<string>', mode='exec')
            self.g = {}
            exec submitted in self.g
            return self.g

    # def check_code(self, test, user_answer, ref_code_path):
    # def check_code(self, user_answer, test_case_data): #@@@v2
    def check_code(self, user_answer, test_case):
        success = False
        try:
            tb = None
            # submitted = compile(user_answer, '<string>', mode='exec')
            # g = {}
            # exec submitted in g
            _tests = compile(test_case, '<string>', mode='exec')
            exec _tests in self.g
        except AssertionError:
            type, value, tb = sys.exc_info()
            info = traceback.extract_tb(tb)
            fname, lineno, func, text = info[-1]
            text = str(test_case).splitlines()[lineno-1]
            err = "{0} {1} in: {2}".format(type.__name__, str(value), text)
        except TimeoutException:
            raise
        except Exception:
            err = traceback.format_exc(limit=0)
        else:
            success = True
            err = 'Correct answer'

        del tb
        return success, err