import io

from flask import Response
from helpers import S3_BUCKET, get_secret, minio_client
from PIL import Image


def update_or_create_avatar(user_id: str, file): #Create&Update function to upload or update user avatar S3/Minio
    try:
        file_data = file.read()
        object_name = f"{get_secret('S3_PREFIX')}/{user_id}" # Bản chất là đường dẫn trong bucket + tên file = user_id
        result = minio_client.put_object(
            S3_BUCKET,
            object_name,
            io.BytesIO(file_data),
            length=len(file_data),
            content_type=file.content_type,
        )

        return result.object_name, 200

    except Exception as e:
        return {"error": str(e)}, 500


def get_avatar_url(user_id: str): #Read function to get user avatar from S3/Minio
    try:
        response = minio_client.get_object(
            bucket_name=S3_BUCKET, object_name=f"{get_secret('S3_PREFIX')}/{user_id}"
        )
        image_data = response.read()

        with Image.open(io.BytesIO(image_data)) as img:
            fmt = img.format.lower()  # ví dụ: 'jpeg', 'png', 'webp'
            content_type = f"image/{'jpeg' if fmt == 'jpg' else fmt}"
        return Response(
            io.BytesIO(image_data),
            content_type=content_type,
            direct_passthrough=True,
        )

    except Exception as e:
        return {"error": str(e)}, 500


def delete_avatar(user_id: str) -> dict: #Delete Function to delete user avatar from S3/Minio
    try:
        result = minio_client.remove_object(
            S3_BUCKET, f"{get_secret('S3_PREFIX')}/{user_id}"
        )
        return result, 200
    except Exception as e:
        return {"error": str(e)}, 500