import click
from pkg_resources import iter_entry_points
import yaml
from sys import exit
from shutil import copy
from os import path, chmod, makedirs
from taskw import TaskWarriorShellout
import logging

log = logging.getLogger(__name__)

APP_NAME = 'twservices'
SAMPLE_CONFIG_FILE = 'sample.config.yml'
CONFIG_FILE = 'config.yml'
CONFIG_DIR = click.get_app_dir(APP_NAME)
PROJ_DIR = path.join(path.dirname(path.realpath(__file__)), APP_NAME)


def __create_config_file():
    user_cfg_file = path.join(CONFIG_DIR, CONFIG_FILE)
    sample_cfg_file = path.join(PROJ_DIR, SAMPLE_CONFIG_FILE)
    if not path.exists(CONFIG_DIR):
        print('Config {} director does not exist, create...'.format(CONFIG_DIR))
        makedirs(CONFIG_DIR)

    copy(sample_cfg_file, user_cfg_file)
    print('Copying {} to {}'.format(sample_cfg_file, user_cfg_file))
    chmod(user_cfg_file, 0o664)
    return user_cfg_file


@click.group()
def main():
    pass


def get_config_file():
    no_config_msg = 'A config file was not found'
    no_config_msg+= ' and will be created under {}. Is that Ok?'
    no_config_msg = no_config_msg.format(click.get_app_dir(APP_NAME))
    cfg_file = path.join(click.get_app_dir(APP_NAME), 'config.yml')
    if not path.exists(cfg_file):
        create_config_app_dir = click.confirm(no_config_msg)
        if create_config_app_dir:
            cfg_file = __create_config_file()
        else:
            exit(0)
    return cfg_file


@main.command()
def sync():
    cfg_file = get_config_file()
    fd = open(cfg_file)
    parse_cfg_file = yaml.safe_load(fd)
    taskwarrior_cfg = parse_cfg_file['taskwarrior']
    services = parse_cfg_file['services']

    log_cfg = parse_cfg_file['logger']
    log_level = 'info' if 'level' not in log_cfg else log_cfg['level']
    log_filename = 'log' if 'file'not in log_cfg else log_cfg['file']

    logging.basicConfig(level=log_level, filename=log_filename)

    for service in services:
        try:
            entry_service_point = iter_entry_points(group='twservices.apps', name=service['name'])
            entry_service_point = next(entry_service_point)
        except StopIteration as e:
            log.error(e)
            log.error('Could not import %s service', services['name'])

        try:
            ServiceClass = entry_service_point.load()
            ServiceInstance = ServiceClass(**service)
            udas = ServiceInstance.get_udas()
            tw = TaskWarriorShellout(
                config_filename=taskwarrior_cfg['rc'],
                config_overrides=udas,
                marshal=True,
            )
            ServiceInstance.set_taskwarrior(tw)
            ServiceInstance.sync()
        except BaseException as e:
            # TODO: Need to handle base exceptions better
            # See if you can print stacktrace
            log.exception('Could not sync %s', e)
            print(e.stderr)
            exit(1)