#coding:utf-8
from configobj import ConfigObj
import shutil
import posixpath


class ConfigError(Exception):
    pass


class Config:
    """
    Gère le fichier de configuration
    """
    def __init__(self):
        
        try:
            self.obj = ConfigObj('config.conf', file_error=True)
        except:
            # pas de fichier: config par défaut
            print('creating config file')
            shutil.copyfile('default.conf', 'config.conf')
            self.obj = ConfigObj('config.conf')
        
        self.check_config()
        print('config loaded')

    @property
    def app(self):
        return self.obj['api']['app']
    
    @property
    def token(self):
        return self.obj['api']['token']
    
    @property
    def server(self):
        return self.obj['api']['server']

    @property
    def extensions(self):
        return self.obj['api']['extensions']
        
    def check_config(self):
        if not 'api' in self.obj:
            raise ConfigError("no 'api' section in config file")
        for k in ['app', 'token', 'extensions', 'server']:
            if not k in self.obj['api']:
                raise ConfigError("no '"+k+"' value in config file, subsection 'api'")
    
    def is_valid_file(self, name):
        _, ext = posixpath.splitext(name)
        return ext[1:] in self.obj['api']['extensions']