'''
Generic, system-wide variables and functions to be used in any / every module
Global variables are defined with _variable_name schema, to be quickly
identified in the project. 
'''

import os

_ROOT = os.path.abspath(os.path.dirname(__file__))
_SERVER_PORT = 8086
_SERVER_IP = '127.0.0.1'
_DB_PATH = './db'


class serverConfiguration(object):
    '''Sets up Conf with appropriate values

    Creates an object that holds the configuration to the whole web server,
    is available throughout the project. This separates the .ini style config
    and the config.py script, that uses additional logic.
    '''
    def __init__(self):
        '''Init Conf values

        Sets up all values in config.Conf.val['option']=value

        Args:
            N/A

        Returns:
            N/A

        Sets:
            dict(self.val[option]): Set via read_config() method,
            does some additional calculations and parsing.
        '''
        if self.read_config('plutonium'):
            print("INFO: Config read success")
            print(self.val)
            self.val['_server_uri'] = \
                "{}://{}".format(
                    self.val['_server_protocol'],
                    self.val['_server_name']
                )
            self.val['_server_port'] = int(self.val['_server_port'])
            self.val['_influx_port'] = int(self.val['_influx_port'])
        else:
            print("ERROR: In reading config")

        self.influx_connectors()

    def read_config(self, conf_filename):
        '''Reads configuration file
    
        Read and parse the configuration options into a dictionary
        Why not using configparser? No idea, subject to change.
        This method is called on class init. 
    
        Args:
            ``conf_filename``, *str()* file name without the .ini extension,
            residing in ./config directory
    
        Returns:
            *dict()*, On success
            
            *bool(False)*, On failure

        Sets:
            ``self.dict()`` of name_value_pairs read from the config file
        
        '''
        read_path = SCRIPT_PATH + '/config/' + conf_filename + '.ini'
        try:
            with open(read_path, 'r') as conf_file:
                config_list = conf_file.readlines()
        except OSError as e:
            print("ERROR: {}".format(e))
            return False
        self.val = {}
        for line in config_list:
            if line.strip() != '':
                try:
                    line = line.split("=")
                    option = line[0].strip().strip("'")
                    value = line[1].strip().strip("'")
                except:
                    exit("WARNING: Wrong format of config option")
                    return False
                self.val.update({option:value})
            else:
                pass
        return self.val