# Copyright (C) 2025 AIDC-AI
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#     http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""
Configuration loader - Pure YAML

Handles loading and saving configuration from/to YAML files.
"""
from pathlib import Path
import yaml
from loguru import logger


def load_config_dict(config_path: str = "config.yaml") -> dict:
    """
    Load configuration from YAML file
    
    Args:
        config_path: Path to config file
        
    Returns:
        Configuration dictionary
    """
    config_file = Path(config_path)
    
    if not config_file.exists():
        logger.warning(f"Config file not found: {config_path}")
        logger.info("Using default configuration")
        return {}
    
    try:
        with open(config_file, 'r', encoding='utf-8') as f:
            data = yaml.safe_load(f) or {}
        logger.info(f"Configuration loaded from {config_path}")
        return data
    except Exception as e:
        logger.error(f"Failed to load config: {e}")
        return {}


def save_config_dict(config: dict, config_path: str = "config.yaml"):
    """
    Save configuration to YAML file
    
    Args:
        config: Configuration dictionary
        config_path: Path to config file
    """
    try:
        with open(config_path, 'w', encoding='utf-8') as f:
            yaml.dump(config, f, allow_unicode=True, default_flow_style=False, sort_keys=False)
        logger.info(f"Configuration saved to {config_path}")
    except Exception as e:
        logger.error(f"Failed to save config: {e}")
        raise