import subprocess

import click
from pathlib import PurePath
import configparser
import logging
from logging.handlers import RotatingFileHandler
import sys

APP_NAME = 'iottb'

CONSOLE_LOG_FORMATS = {
    0: '%(levelname)s - %(message)s',
    1: '%(levelname)s - %(module)s - %(message)s',
    2: '%(levelname)s - %(asctime)s - %(module)s - %(funcName)s - %(lineno)d - %(message)s'
}

LOGFILE_LOG_FORMAT = {
    0: '%(levelname)s - %(asctime)s - %(module)s  - %(message)s',
    1: '%(levelname)s - %(asctime)s - %(module)s - %(funcName)s - %(message)s',
    2: '%(levelname)s - %(asctime)s - %(module)s - %(funcName)s - %(lineno)d - %(message)s'
}
MAX_VERBOSITY = len(CONSOLE_LOG_FORMATS) - 1
assert len(LOGFILE_LOG_FORMAT) == len(CONSOLE_LOG_FORMATS), 'Log formats must be same size'


def setup_logging(verbosity, debug):
    """ Setup root logger for iottb """
    log_level = logging.ERROR
    logger = logging.getLogger()
    date_format = '%Y-%m-%d %H:%M:%S'
    if verbosity > 0:
        log_level = logging.WARNING
        if verbosity > MAX_VERBOSITY:
            verbosity = MAX_VERBOSITY
            log_level = logging.INFO
        assert verbosity <= MAX_VERBOSITY, f'Verbosity must be <= {MAX_VERBOSITY}'
        console_handler = logging.StreamHandler(sys.stdout)
        console_handler.setFormatter(logging.Formatter(CONSOLE_LOG_FORMATS[verbosity], datefmt=date_format))
        console_handler.setLevel(logging.DEBUG)  # can keep at debug since it depends on global level?
        logger.addHandler(console_handler)

    if debug:
        log_level = logging.DEBUG

    # Logfile logs INFO+, no debugs though
    file_handler = RotatingFileHandler(f'{APP_NAME}.log', maxBytes=10240, backupCount=5)
    file_handler.setFormatter(logging.Formatter(LOGFILE_LOG_FORMAT[verbosity], datefmt=date_format))
    file_handler.setLevel(logging.INFO)

    # finnish root logger setup
    logger.addHandler(file_handler)
    logger.setLevel(log_level)
    return logger


class Environment:
    def __init__(self, cfg=None, db=None, device=None):
        self.cfg = cfg
        self.db = db
        self.device = device
        pass


def load_config(cfg_file_path):
    cfg_file = PurePath(click.get_app_dir(APP_NAME)).joinpath('iottb.cfg')


@click.group()
@click.option('-v', '--verbosity', type=click.IntRange(0, MAX_VERBOSITY), default=0,
              help='Verbosity level')
@click.option('-d', '--debug', is_flag=True, default=False, help='Debug mode')
@click.option('--cfg-file', type=click.Path(), default=PurePath(click.get_app_dir(APP_NAME)).joinpath('iottb.cfg'),
              envvar='IOTTB_CONF_HOME',)
def main(debug, verbose):
    setup_logging(verbose, debug)


if __name__ == '__main__':
    main(auto_envvar_prefix='IOTTB')