#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Fri Sep 27 14:20:58 2019

@author: tanya
"""

import os
import sys
import pandas as pd
from cdplib.log import Log

sys.path.append(os.getcwd())


class ExceptionsHandler:
    '''
    '''
    def __init__(self, logger: Log = None):
        '''
        '''
        self._logger = logger or Log("ExceptionHandler")

    def check_is_file(self, path: str):
        '''
        '''
        if not os.path.isfile(path):
            err = "File {} not found".format(path)
            self._logger.error(err)
            raise FileNotFoundError(err)

    def assert_is_directory(self, path: str):
        ""
        ""
        assert(isinstance(path, str)),\
            "Parameter 'path' must of str type"

        dirname = os.path.dirname("path")

        if len(dirname) > 0:
            os.mkdir(dirname, exists_ok=True)

    def _check_column_abscence(self,
                               columns: (str, list),
                               data: pd.DataFrame,
                               error_or_warning: str):
        '''
        '''
        if isinstance(columns, str):
            columns = [columns]

        for column in columns:

            if column not in data.columns:
                err = ("{} is not an internal column name".format(column))
                getattr(self._logger, error_or_warning)(err)

                if error_or_warning == "error":
                    raise Exception(err)

    def error_column_abscence(self,
                              columns: (str, list),
                              data: pd.DataFrame):
        '''
        '''
        return self._check_column_abscence(columns=columns,
                                           data=data,
                                           error_or_warning="error")

    def warn_column_abscence(self, columns: (str, list), data: pd.DataFrame):
        '''
        '''
        return self._check_column_abscence(columns=columns,
                                           data=data,
                                           error_or_warning="warning")