# -*- coding: utf-8 -*-
#
import os

from dotenv import load_dotenv

from .conf import ConfigManager

__all__ = ['BASE_DIR', 'PROJECT_DIR', 'VERSION', 'CONFIG', 'CONFIG_SOURCE']

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
LOG_DIR = os.path.join('/', 'opt', 'maxkb', 'logs')
PROJECT_DIR = os.path.dirname(BASE_DIR)
VERSION = '2.0.0'
DEFAULT_CONFIG_ROOT = os.path.abspath('/opt/maxkb/conf')
CONFIG_FILENAMES = ('config_example.yml', 'config.yaml', 'config.yml')

# load environment variables from .env file
load_dotenv()


def _has_config_file(root_path):
    return any(os.path.isfile(os.path.join(root_path, name)) for name in CONFIG_FILENAMES)


def _resolve_config_target():
    config_path = os.environ.get('MAXKB_CONFIG')
    if config_path:
        config_path = os.path.abspath(config_path)
        if os.path.isfile(config_path):
            return os.path.dirname(config_path), os.path.basename(config_path), config_path
        if os.path.isdir(config_path):
            if _has_config_file(config_path):
                return config_path, None, config_path
            raise ImportError(f'No config file found in MAXKB_CONFIG directory: {config_path}')
        raise ImportError(f'MAXKB_CONFIG path does not exist: {config_path}')

    for root_path in (DEFAULT_CONFIG_ROOT, PROJECT_DIR):
        if _has_config_file(root_path):
            return root_path, None, root_path

    return DEFAULT_CONFIG_ROOT, None, DEFAULT_CONFIG_ROOT


def _load_config():
    if os.environ.get('MAXKB_CONFIG_TYPE') == 'ENV':
        root_path, filename, source = _resolve_config_target()
        manager = ConfigManager(root_path=root_path)
        if filename:
            manager.from_yaml(filename)
            source = f'ENV + {source}'
        elif _has_config_file(root_path):
            manager.load_from_yml()
            source = f'ENV + {source}'
        else:
            source = 'ENV'
        manager.load_from_env()
        return manager.config, source

    root_path, filename, source = _resolve_config_target()
    if filename:
        manager = ConfigManager(root_path=root_path)
        manager.from_yaml(filename)
        return manager.config, source

    return ConfigManager.load_user_config(root_path=root_path), source


CONFIG, CONFIG_SOURCE = _load_config()