from pydantic_settings import BaseSettings
from typing import Optional, Dict, Any, List
import os
import logging

# 创建一个基本的配置日志记录器
config_logger = logging.getLogger("config")
if not config_logger.handlers:
    handler = logging.StreamHandler()
    handler.setFormatter(logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    ))
    config_logger.addHandler(handler)
    config_logger.setLevel(logging.INFO)


class Settings(BaseSettings):
    PROJECT_NAME: str = "ExamService"
    VERSION: str = "1.0.0"
    API_V1_STR: str = "/api/v1"
    

    MYSQL_USER: str = "mooc"
    MYSQL_PASSWORD: str = "CzHkA6JFCL5hznhP"
    MYSQL_HOST: str = "localhost"
    MYSQL_PORT: str = "3306"
    MYSQL_DATABASE: str = "mooc"
    
    SQLALCHEMY_DATABASE_URI: Optional[str] = None
    SQLALCHEMY_ECHO: bool = False

    SECRET_KEY: str = "your-secret-key-here"  
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    
    WECHAT_APPID: str = ""
    WECHAT_APPSECRET: str = ""

    WECHAT_UNIACID: int = 1
    # 日志配置
    LOG_DIR: str = "logs"
    LOG_NAME: str = "exam_service"
    LOG_LEVEL: int = logging.DEBUG
    LOG_MAX_SIZE: int = 10 * 1024 * 1024  # 10MB
    LOG_BACKUP_COUNT: int = 5
    ENVIRONMENT: str = "development"  # development, testing, production

    BASE_URL: str = "http://127.0.0.1:2333"
    UPLOAD_IMG_DIR: str = "upload/images"
    ATTACH_URL: str = "/attachment/"  # 用于构建返回的文件URL

    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        # 设置数据库URI
        self.SQLALCHEMY_DATABASE_URI = (
            f"mysql+pymysql://{self.MYSQL_USER}:{self.MYSQL_PASSWORD}"
            f"@{self.MYSQL_HOST}:{self.MYSQL_PORT}/{self.MYSQL_DATABASE}"
        )
        
        # 确保上传目录为绝对路径并存在
        self._setup_upload_directory()
    
    def _setup_upload_directory(self):
        """确保上传目录为绝对路径且存在"""
        # 首先记录初始值，便于诊断
        config_logger.info(f"初始上传目录配置: {self.UPLOAD_IMG_DIR}")
        
        # 确保没有前导斜杠，避免被误判为绝对路径
        if self.UPLOAD_IMG_DIR.startswith('/'):
            self.UPLOAD_IMG_DIR = self.UPLOAD_IMG_DIR[1:]
            config_logger.info(f"移除前导斜杠: {self.UPLOAD_IMG_DIR}")
        
        # 规范化路径分隔符
        self.UPLOAD_IMG_DIR = os.path.normpath(self.UPLOAD_IMG_DIR)
        
        # 现在正确判断并处理绝对路径
        if not os.path.isabs(self.UPLOAD_IMG_DIR):
            # 获取当前工作目录的绝对路径
            current_dir = os.path.abspath(os.getcwd())
            config_logger.info(f"当前工作目录: {current_dir}")
            
            # 安全地拼接路径
            self.UPLOAD_IMG_DIR = os.path.join(current_dir, self.UPLOAD_IMG_DIR)
            config_logger.info(f"转换上传目录为绝对路径: {self.UPLOAD_IMG_DIR}")
        
        # 确保目录存在
        if not os.path.exists(self.UPLOAD_IMG_DIR):
            os.makedirs(self.UPLOAD_IMG_DIR, exist_ok=True)
            config_logger.info(f"创建上传目录: {self.UPLOAD_IMG_DIR}")
        else:
            config_logger.info(f"上传目录已存在: {self.UPLOAD_IMG_DIR}")
        
        # 记录最终的上传目录路径
        config_logger.info(f"上传文件将保存到: {self.UPLOAD_IMG_DIR}")

    class Config:
        env_file = ".env"

settings = Settings()