import oss2
import httpx
import os
import io
from fastapi import HTTPException

# 加载配置
ACCESS_KEY_ID = os.getenv("S3_ACCESS_KEY_ID")
ACCESS_KEY_SECRET = os.getenv("S3_SECRET_ACCESS_KEY")
ENDPOINT = os.getenv("S3_ENDPOINT", "https://oss-ap-northeast-1.aliyuncs.com")
BUCKET_NAME = os.getenv("S3_STORAGE_BUCKET_NAME", "character-roleplay-dev-asset")

# 初始化阿里云 Auth 和 Bucket
auth = oss2.Auth(ACCESS_KEY_ID, ACCESS_KEY_SECRET)
bucket = oss2.Bucket(auth, ENDPOINT, BUCKET_NAME)

async def upload_google_avatar_to_s3(google_avatar_url: str, user_id: str) -> str:
    """
    下载 Google 头像并上传到阿里云 OSS
    """
    try:
        # 1. 使用 httpx 下载图片
        async with httpx.AsyncClient(timeout=10.0) as client:
            response = await client.get(google_avatar_url)
            if response.status_code != 200:
                return google_avatar_url
            
            image_data = response.content
            # 获取内容类型（如 image/jpeg）
            content_type = response.headers.get("Content-Type", "image/jpeg")

        # 构造 OSS 中的存储路径
        object_name = f"avatars/{user_id}/avatar.jpg"

        headers = {"Content-Type": content_type}
        
        # oss2.Bucket.put_object 是同步阻塞调用
        # 在高并发下建议使用 run_in_executor，初期可以直接这样写
        bucket.put_object(object_name, image_data, headers=headers)

        # 4. 生成公开访问的 URL
        # 阿里云 OSS 标准 URL 格式: https://bucket-name.endpoint/object-name
        # 例如: https://character-roleplay-dev-asset.oss-ap-northeast-1.aliyuncs.com/avatars/xxx/avatar.jpg
        host = ENDPOINT.replace("https://", "")
        oss_url = f"https://{BUCKET_NAME}.{host}/{object_name}"
        
        return oss_url

    except Exception as e:
        # 打印错误日志，生产环境建议使用 logger
        print(f"OSS Upload Error: {str(e)}")
        # 降级处理：上传失败则返回原始 Google URL，确保用户能注册成功
        return google_avatar_url