"""
配置管理模块
优先级：Web UI 设置 (data/config.json) > 环境变量 > 默认值
"""
import os
import json
import logging

logger = logging.getLogger(__name__)

CONFIG_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'data', 'config.json')

# 默认配置
DEFAULT_CONFIG = {
    'secsion': {
        'username': '',
        'password': ''
    },
    'scheduler': {
        'enabled': True,
        'hour': 1,
        'minute': 0
    }
}


def _ensure_config_dir():
    """确保配置目录存在"""
    os.makedirs(os.path.dirname(CONFIG_FILE), exist_ok=True)


def _load_config():
    """从 config.json 加载配置"""
    try:
        if os.path.exists(CONFIG_FILE):
            with open(CONFIG_FILE, 'r', encoding='utf-8') as f:
                return json.load(f)
    except Exception as e:
        logger.warning(f"读取配置文件失败: {e}")
    return {}


def _save_config(config):
    """保存配置到 config.json"""
    _ensure_config_dir()
    try:
        with open(CONFIG_FILE, 'w', encoding='utf-8') as f:
            json.dump(config, f, ensure_ascii=False, indent=2)
        logger.info("配置已保存")
        return True
    except Exception as e:
        logger.error(f"保存配置文件失败: {e}")
        return False


class Config:
    """配置管理器"""

    @staticmethod
    def get_secsion_credentials():
        """
        获取 secsion.com 登录凭据

        优先级：config.json > 环境变量

        Returns:
            tuple: (username, password) 或 None
        """
        # 1. 从 config.json 读取
        config = _load_config()
        secsion = config.get('secsion', {})
        username = secsion.get('username', '').strip()
        password = secsion.get('password', '').strip()

        if username and password:
            return (username, password)

        # 2. 从环境变量读取
        env_username = os.environ.get('SECSION_USERNAME', '').strip()
        env_password = os.environ.get('SECSION_PASSWORD', '').strip()

        if env_username and env_password:
            return (env_username, env_password)

        return None

    @staticmethod
    def save_secsion_credentials(username, password):
        """保存 secsion.com 登录凭据"""
        config = _load_config()
        config.setdefault('secsion', {})
        config['secsion']['username'] = username
        config['secsion']['password'] = password
        return _save_config(config)

    @staticmethod
    def get_schedule_config():
        """
        获取定时任务配置

        Returns:
            dict: {'enabled': bool, 'hour': int, 'minute': int}
        """
        config = _load_config()
        schedule = config.get('scheduler', {})

        # 回退到环境变量
        env_enabled = os.environ.get('SCHEDULER_ENABLED', '').lower()
        env_hour = os.environ.get('SCHEDULER_HOUR', '')
        env_minute = os.environ.get('SCHEDULER_MINUTE', '')

        return {
            'enabled': schedule.get('enabled', env_enabled != 'false' if env_enabled else True),
            'hour': schedule.get('hour', int(env_hour) if env_hour else 1),
            'minute': schedule.get('minute', int(env_minute) if env_minute else 0)
        }

    @staticmethod
    def save_schedule_config(enabled=True, hour=1, minute=0):
        """保存定时任务配置"""
        config = _load_config()
        config.setdefault('scheduler', {})
        config['scheduler']['enabled'] = enabled
        config['scheduler']['hour'] = hour
        config['scheduler']['minute'] = minute
        return _save_config(config)

    @staticmethod
    def get_shop_id():
        """获取店铺 ID"""
        config = _load_config()
        secsion = config.get('secsion', {})
        shop_id = secsion.get('shop_id', '').strip()
        if shop_id:
            return shop_id
        return os.environ.get('SECSION_SHOP_ID', '').strip() or None

    @staticmethod
    def save_shop_id(shop_id):
        """保存店铺 ID"""
        config = _load_config()
        config.setdefault('secsion', {})
        config['secsion']['shop_id'] = shop_id
        return _save_config(config)

    @staticmethod
    def get_all_config():
        """获取所有配置（密码脱敏）"""
        config = _load_config()
        secsion = config.get('secsion', {})

        return {
            'secsion': {
                'username': secsion.get('username', ''),
                'password': '******' if secsion.get('password') else '',
                'shop_id': secsion.get('shop_id', '')
            },
            'scheduler': config.get('scheduler', DEFAULT_CONFIG['scheduler'])
        }