import io
import os
import boto3
from botocore.exceptions import NoCredentialsError

ACCESS_KEY = os.environ.get('ACCESS_KEY')
SECRET_KEY = os.environ.get('SECRET_KEY')
ENDPOINT = os.environ.get("ENDPOINT")
BUCKET_NAME = 'host'

def create_s3_client(access_key, secret_key, endpoint_url):
    try:
        s3_client = boto3.client(
            's3',
            aws_access_key_id=access_key,
            aws_secret_access_key=secret_key,
            endpoint_url=endpoint_url
        )
        return s3_client
    except NoCredentialsError:
        print("Credentials not available")
        return None

# 上传文件到 S3（或兼容 S3 的服务，如 IDrive e2）
def upload_file_stream_to_s3(file_stream, bucket_name, key):
    s3_client = create_s3_client(ACCESS_KEY, SECRET_KEY, ENDPOINT)
    file_stream.seek(0)
    s3_client.upload_fileobj(
        file_stream,
        bucket_name,
        key
    )
    # with open("output/output.pdf", 'wb') as f:
    #     file_stream.seek(0)
    #     f.write(file_stream.getvalue())
    print(f"{key} has been uploaded to {bucket_name}")
    return True

def download_file_stream_from_s3(bucket_name, key):
    fileobj = io.BytesIO()
    s3_client = create_s3_client(ACCESS_KEY, SECRET_KEY, ENDPOINT)
    s3_client.download_fileobj(
        bucket_name,
        key,
        fileobj,
    )
    return fileobj


# FILE_PATH = "src/assets/InvitationTemplate.pdf"
# OBJECT_NAME = 'test.pdf'
# ACCESS_KEY = os.environ.get('ACCESS_KEY')
# SECRET_KEY = os.environ.get('SECRET_KEY')
# ENDPOINT = os.environ.get("ENDPOINT")
# BUCKET_NAME = 'host'
# FILE_PATH = "src/assets/InvitationTemplate.pdf"
# OBJECT_NAME = 'test.pdf'

# # 创建 S3 客户端
# s3_client = create_s3_client(ACCESS_KEY, SECRET_KEY, ENDPOINT)

# # 上传文件
# if s3_client:
#     # upload_file_to_s3(s3_client, FILE_PATH, BUCKET_NAME, OBJECT_NAME)
#     fileobj = download_file_stream_from_s3(s3_client, BUCKET_NAME, OBJECT_NAME)
#     with open(OBJECT_NAME, 'wb') as f:
#         f.write(fileobj.getvalue())