from werkzeug.middleware.proxy_fix import ProxyFix
import logging
import os


root_dir = os.path.abspath(os.path.dirname(__file__))


DEFAULT_DATA_DIR = os.path.join('/mnt/nopaque')
DEFAULT_DB_PORT = '5432'
DEFAULT_DEBUG = 'False'
DEFAULT_LOG_DATE_FORMAT = '%Y-%m-%d %H:%M:%S'
DEFAULT_LOG_FILE = os.path.join(root_dir, 'nopaque.log')
DEFAULT_LOG_FORMAT = ('[%(asctime)s] %(levelname)s in %(pathname)s '
                      '(function: %(funcName)s, line: %(lineno)d): '
                      '%(message)s')
DEFAULT_LOG_LEVEL = 'ERROR'
DEFAULT_SMTP_USE_SSL = 'False'
DEFAULT_SMTP_USE_TLS = 'False'
DEFAULT_NUM_PROXIES = '0'
DEFAULT_PROTOCOL = 'http'
DEFAULT_RESSOURCES_PER_PAGE = '5'
DEFAULT_USERS_PER_PAGE = '10'
DEFAULT_SECRET_KEY = 'hard to guess string'


class Config:
    ''' ### Database ### '''
    DB_HOST = os.environ.get('NOPAQUE_DB_HOST')
    DB_NAME = os.environ.get('NOPAQUE_DB_NAME')
    DB_PASSWORD = os.environ.get('NOPAQUE_DB_PASSWORD')
    DB_PORT = os.environ.get('NOPAQUE_DB_PORT', DEFAULT_DB_PORT)
    DB_USERNAME = os.environ.get('NOPAQUE_DB_USERNAME')
    SQLALCHEMY_DATABASE_URI = 'postgresql://{}:{}@{}:{}/{}'.format(
        DB_USERNAME, DB_PASSWORD, DB_HOST, DB_PORT, DB_NAME)
    SQLALCHEMY_RECORD_QUERIES = True
    SQLALCHEMY_TRACK_MODIFICATIONS = False

    ''' ### Email ### '''
    MAIL_DEFAULT_SENDER = os.environ.get('NOPAQUE_SMTP_DEFAULT_SENDER')
    MAIL_PASSWORD = os.environ.get('NOPAQUE_SMTP_PASSWORD')
    MAIL_PORT = os.environ.get('NOPAQUE_SMTP_PORT')
    MAIL_SERVER = os.environ.get('NOPAQUE_SMTP_SERVER')
    MAIL_USERNAME = os.environ.get('NOPAQUE_SMTP_USERNAME')
    MAIL_USE_SSL = os.environ.get('NOPAQUE_SMTP_USE_SSL',
                                  DEFAULT_SMTP_USE_SSL).lower() == 'true'
    MAIL_USE_TLS = os.environ.get('NOPAQUE_SMTP_USE_TLS',
                                  DEFAULT_SMTP_USE_TLS).lower() == 'true'

    ''' ### General ### '''
    ADMIN_EMAIL_ADRESS = os.environ.get('NOPAQUE_ADMIN_EMAIL_ADRESS')
    CONTACT_EMAIL_ADRESS = os.environ.get('NOPAQUE_CONTACT_EMAIL_ADRESS')
    DATA_DIR = os.environ.get('NOPAQUE_DATA_DIR', DEFAULT_DATA_DIR)
    DEBUG = os.environ.get('NOPAQUE_DEBUG', DEFAULT_DEBUG).lower() == 'true'
    NUM_PROXIES = int(os.environ.get('NOPAQUE_NUM_PROXIES',
                                     DEFAULT_NUM_PROXIES))
    PROTOCOL = os.environ.get('NOPAQUE_PROTOCOL', DEFAULT_PROTOCOL)
    RESSOURCES_PER_PAGE = int(os.environ.get('NOPAQUE_RESSOURCES_PER_PAGE',
                                             DEFAULT_RESSOURCES_PER_PAGE))
    SECRET_KEY = os.environ.get('NOPAQUE_SECRET_KEY', DEFAULT_SECRET_KEY)
    USERS_PER_PAGE = int(os.environ.get('NOPAQUE_USERS_PER_PAGE',
                                        DEFAULT_USERS_PER_PAGE))
    if PROTOCOL == 'https':
        REMEMBER_COOKIE_HTTPONLY = True
        REMEMBER_COOKIE_SECURE = True
        SESSION_COOKIE_SECURE = True

    ''' ### Logging ### '''
    LOG_DATE_FORMAT = os.environ.get('NOPAQUE_LOG_DATE_FORMAT',
                                     DEFAULT_LOG_DATE_FORMAT)
    LOG_FILE = os.environ.get('NOPAQUE_LOG_FILE', DEFAULT_LOG_FILE)
    LOG_FORMAT = os.environ.get('NOPAQUE_LOG_FORMAT', DEFAULT_LOG_FORMAT)
    LOG_LEVEL = os.environ.get('NOPAQUE_LOG_LEVEL', DEFAULT_LOG_LEVEL)

    ''' ### Message queue ### '''
    MQ_HOST = os.environ.get('NOPAQUE_MQ_HOST')
    MQ_PORT = os.environ.get('NOPAQUE_MQ_PORT')
    MQ_TYPE = os.environ.get('NOPAQUE_MQ_TYPE')
    SOCKETIO_MESSAGE_QUEUE_URI = \
        '{}://{}:{}/'.format(MQ_TYPE, MQ_HOST, MQ_PORT)

    def init_app(self, app):
        # Configure logging according to the corresponding (LOG_*) config
        # entries
        logging.basicConfig(datefmt=self.LOG_DATE_FORMAT,
                            filename=self.LOG_FILE,
                            format=self.LOG_FORMAT,
                            level=self.LOG_LEVEL)
        # Apply the ProxyFix middleware if nopaque is running behind reverse
        # proxies. (NUM_PROXIES indicates the number of reverse proxies running
        # in front of nopaque)
        if self.NUM_PROXIES > 0:
            app.wsgi_app = ProxyFix(app.wsgi_app,
                                    x_for=self.NUM_PROXIES,
                                    x_host=self.NUM_PROXIES,
                                    x_port=self.NUM_PROXIES,
                                    x_proto=self.NUM_PROXIES)