# config/settings.py
import os
import urllib.parse
from typing import Dict, Any
from dotenv import load_dotenv

# 加载.env文件
load_dotenv()


class Settings:
    """配置管理器"""
    
    def __init__(self):
        # 从环境变量加载配置
        self.HOST = os.getenv('HOST', '0.0.0.0')
        self.PORT = int(os.getenv('PORT', '8000'))
        self.DEBUG = os.getenv('DEBUG', 'false').lower() == 'true'
        
        # 文件处理配置
        self.UPLOAD_DIR = os.getenv('UPLOAD_DIR', './uploads')
        self.MAX_FILE_SIZE = int(os.getenv('MAX_FILE_SIZE', '104857600'))
        self.ALLOWED_EXTENSIONS = os.getenv('ALLOWED_EXTENSIONS', '.stp,.step,.stp.gz')
        
        # 几何处理配置
        self.POINTCLOUD_SAMPLE_COUNT = int(os.getenv('POINTCLOUD_SAMPLE_COUNT', '10000'))
        self.MESH_QUALITY = os.getenv('MESH_QUALITY', 'high')
        self.PARALLEL_PROCESSING = os.getenv('PARALLEL_PROCESSING', 'true').lower() == 'true'
        
        # RustFS 对象存储配置 (S3v4 API)
        self.RUSTFS_ENDPOINT = os.getenv('RUSTFS_ENDPOINT', 'http://localhost:8080')
        self.RUSTFS_ACCESS_KEY = os.getenv('RUSTFS_ACCESS_KEY', 'your-access-key')
        self.RUSTFS_SECRET_KEY = os.getenv('RUSTFS_SECRET_KEY', 'your-secret-key')
        self.RUSTFS_TIMEOUT = int(os.getenv('RUSTFS_TIMEOUT', '30'))
        
        # 预签名URL过期时间（秒）
        self.RUSTFS_PRESIGNED_URL_EXPIRES = int(os.getenv('RUSTFS_PRESIGNED_URL_EXPIRES', '3600'))
        
        # 数据库配置 - 必须来自环境变量
        # 先检查所有配置是否存在
        db_host = os.getenv('DB_HOST')
        db_port_str = os.getenv('DB_PORT')
        db_name = os.getenv('DB_NAME')
        db_user = os.getenv('DB_USER')
        db_password = os.getenv('DB_PASSWORD')
        
        missing_configs = []
        if not db_host:
            missing_configs.append("DB_HOST")
        if not db_port_str:
            missing_configs.append("DB_PORT")
        if not db_name:
            missing_configs.append("DB_NAME")
        if not db_user:
            missing_configs.append("DB_USER")
        if not db_password:
            missing_configs.append("DB_PASSWORD")
            
        if missing_configs:
            raise ValueError(f"数据库配置缺失，请在.env文件中设置: {', '.join(missing_configs)}")
        
        # 所有配置都存在，进行赋值
        self.DB_HOST = db_host
        self.DB_PORT = int(db_port_str)
        self.DB_NAME = db_name
        self.DB_USER = db_user
        self.DB_PASSWORD = db_password
        
        # JWT配置
        self.SECRET_KEY = os.getenv('SECRET_KEY', 'your-secret-key-change-in-production')
        self.ALGORITHM = os.getenv('ALGORITHM', 'HS256')
        self.ACCESS_TOKEN_EXPIRE_MINUTES = int(os.getenv('ACCESS_TOKEN_EXPIRE_MINUTES', '1440'))
        
        # 管理员账户配置
        self.ADMIN_USERNAME = os.getenv('ADMIN_USERNAME', 'admin')
        self.ADMIN_PASSWORD = os.getenv('ADMIN_PASSWORD', 'admin123')
        self.ADMIN_EMAIL = os.getenv('ADMIN_EMAIL', 'admin@gemold.com')
        self.ADMIN_FULL_NAME = os.getenv('ADMIN_FULL_NAME', '系统管理员')
        
        # FreeCAD 验证配置
        self.ENABLE_FREECAD_VERIFICATION = os.getenv('ENABLE_FREECAD_VERIFICATION', 'false').lower() == 'true'
        self.FREECAD_VERIFICATION_TIMEOUT = int(os.getenv('FREECAD_VERIFICATION_TIMEOUT', '120'))
    
    @property
    def DATABASE_URL(self) -> str:
        """动态生成数据库连接URL"""
        # 安全编码密码
        if self.DB_PASSWORD:
            safe_password = urllib.parse.quote(self.DB_PASSWORD.encode('utf-8'), safe='')
        else:
            safe_password = ""
        
        return f"postgresql+asyncpg://{self.DB_USER}:{safe_password}@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"
    
    @property
    def allowed_extensions_set(self) -> set:
        """将ALLOWED_EXTENSIONS字符串转换为set"""
        return set(ext.strip() for ext in self.ALLOWED_EXTENSIONS.split(','))


# 创建全局配置实例
settings = Settings()