"""
短信转发接收端配置文件
支持从 config.json 加载配置
"""

import os
import json
from typing import Dict, List, Any


class Config:
    """基础配置"""
    # 服务器配置
    HOST = '0.0.0.0'
    PORT = 9518
    DEBUG = False

    # 安全配置
    SECRET_KEY = 'default_secret_key_change_me'
    SIGN_VERIFY = True
    SIGN_MAX_AGE = 3600000  # 签名最大有效时间（毫秒），默认1小时

    # 登录配置
    LOGIN_ENABLED = True
    LOGIN_USERNAME = 'admin'
    LOGIN_PASSWORD = 'admin123'
    SESSION_LIFETIME = 3600  # 会话有效期（秒），默认1小时

    # 纯 Token 模式配置
    TOKEN_ONLY_MODE = False  # 纯 Token 模式：只验证 token，跳过 HMAC 签名验证

    # 数据库配置
    BASE_DIR = os.path.dirname(os.path.abspath(__file__))
    DATABASE_PATH = os.path.join(BASE_DIR, 'sms_receiver.db')

    # 短信存储配置
    MAX_MESSAGES = 10000
    AUTO_CLEANUP = True
    CLEANUP_DAYS = 30

    # Web界面配置
    PER_PAGE = 50
    REFRESH_INTERVAL = 30

    # 日志配置
    LOG_LEVEL = 'INFO'
    LOG_FILE = 'sms_receiver.log'

    # 时区配置
    TIMEZONE = 'Asia/Shanghai'

    # API Token 配置
    API_TOKENS: List[Dict[str, Any]] = []

    @classmethod
    def load_from_json(cls, json_path: str = 'config.json') -> 'Config':
        """从 JSON 文件加载配置"""
        config_obj = cls()

        if os.path.exists(json_path):
            with open(json_path, 'r', encoding='utf-8') as f:
                config_data = json.load(f)

            # 服务器配置
            if 'server' in config_data:
                server = config_data['server']
                config_obj.HOST = server.get('host', config_obj.HOST)
                config_obj.PORT = server.get('port', config_obj.PORT)
                config_obj.DEBUG = server.get('debug', config_obj.DEBUG)

            # 安全配置
            if 'security' in config_data:
                security = config_data['security']
                config_obj.LOGIN_ENABLED = security.get('enabled', config_obj.LOGIN_ENABLED)
                config_obj.LOGIN_USERNAME = security.get('username', config_obj.LOGIN_USERNAME)
                config_obj.LOGIN_PASSWORD = security.get('password', config_obj.LOGIN_PASSWORD)
                config_obj.SESSION_LIFETIME = security.get('session_lifetime', config_obj.SESSION_LIFETIME)
                config_obj.SECRET_KEY = security.get('secret_key', config_obj.SECRET_KEY)
                config_obj.SIGN_VERIFY = security.get('sign_verify', config_obj.SIGN_VERIFY)
                config_obj.SIGN_MAX_AGE = security.get('sign_max_age', config_obj.SIGN_MAX_AGE)

            # 短信配置
            if 'sms' in config_data:
                sms = config_data['sms']
                config_obj.MAX_MESSAGES = sms.get('max_messages', config_obj.MAX_MESSAGES)
                config_obj.AUTO_CLEANUP = sms.get('auto_cleanup', config_obj.AUTO_CLEANUP)
                config_obj.CLEANUP_DAYS = sms.get('cleanup_days', config_obj.CLEANUP_DAYS)

            # 数据库配置
            if 'database' in config_data:
                database = config_data['database']
                if 'path' in database:
                    # 如果是绝对路径，直接使用；如果是相对路径，相对于项目目录
                    db_path = database['path']
                    if not os.path.isabs(db_path):
                        db_path = os.path.join(config_obj.BASE_DIR, db_path)
                    config_obj.DATABASE_PATH = db_path

            # 时区配置
            if 'timezone' in config_data:
                config_obj.TIMEZONE = config_data['timezone']

            # API Token 配置
            if 'api_tokens' in config_data:
                config_obj.API_TOKENS = config_data['api_tokens']

        return config_obj


class DevelopmentConfig(Config):
    """开发环境配置"""
    DEBUG = True
    LOG_LEVEL = 'DEBUG'


class ProductionConfig(Config):
    """生产环境配置"""
    DEBUG = False


# 配置映射
config = {
    'development': DevelopmentConfig,
    'production': ProductionConfig,
    'default': DevelopmentConfig
}