"""
OSS 上传服务
"""
import oss2
from typing import Optional
from utils.config import settings
from utils.logger import logger
from utils.crypto import encrypt_url, decrypt_url


class OSSService:
    def __init__(self):
        auth = oss2.Auth(settings.oss.access_key_id, settings.oss.access_key_secret)
        self.bucket = oss2.Bucket(auth, settings.oss.endpoint, settings.oss.bucket)
        self.encrypt_key = settings.oss.parse_encrypt_key
    
    def upload_file(self, file_data: bytes, filename: str, folder: str = "uploads") -> str:
        """上传文件到OSS"""
        try:
            object_name = f"{folder}/{filename}"
            result = self.bucket.put_object(object_name, file_data)
            
            if result.status == 200:
                file_url = f"https://{settings.oss.bucket}.{settings.oss.endpoint}/{object_name}"
                encrypted_url = encrypt_url(file_url)
                logger.info(f"文件上传成功: {object_name}")
                return encrypted_url
            else:
                raise Exception(f"上传失败，状态码: {result.status}")
        except Exception as e:
            logger.error(f"OSS上传失败: {e}")
            raise
    
    def upload_image(self, file_data: bytes, filename: str) -> str:
        """上传图片"""
        return self.upload_file(file_data, filename, folder="images")
    
    def upload_json(self, json_data: str, filename: str) -> str:
        """上传JSON文件"""
        return self.upload_file(json_data.encode('utf-8'), filename, folder="json")
    
    def get_file_url(self, object_name: str, expires: int = 3600) -> str:
        """获取文件访问URL"""
        try:
            url = self.bucket.sign_url('GET', object_name, expires)
            return url
        except Exception as e:
            logger.error(f"获取文件URL失败: {e}")
            raise


    def parse_url(self, encrypted_url: str) -> str:
        """解析加密的URL"""
        try:
            return decrypt_url(encrypted_url)
        except Exception as e:
            logger.error(f"URL解析失败: {e}")
            raise
    
    def get_signed_url(self, filename: str, expires: int = 3600) -> str:
        """获取签名URL"""
        try:
            object_name = f"shudao/{filename}"
            url = self.bucket.sign_url('GET', object_name, expires)
            return url
        except Exception as e:
            logger.error(f"获取签名URL失败: {e}")
            raise


# 全局实例
oss_service = OSSService()