import os
import base64
import uuid
import httpx
from dotenv import load_dotenv

load_dotenv()

def upload_base64_file(file_base64: str, filename: str, folder: str = "attachments") -> str:
    """
    Decodes a base64 string and uploads it directly to Supabase Storage via REST API.
    Returns the public URL of the uploaded file.
    """
    supabase_url = os.getenv("SUPABASE_URL")
    supabase_key = os.getenv("SUPABASE_API_KEY")
    bucket = os.getenv("SUPABASE_BUCKET", "complaints")

    if not supabase_url or not supabase_key:
        raise RuntimeError(
            "Supabase is not configured. "
            "Set SUPABASE_URL and SUPABASE_API_KEY in Hugging Face Space secrets."
        )

    try:
        if "," in file_base64:
            file_base64 = file_base64.split(",")[1]

        file_data = base64.b64decode(file_base64)
        unique_id = str(uuid.uuid4())
        file_path = f"{folder}/{unique_id}_{filename}"

        # 1. Upload the file
        upload_url = f"{supabase_url}/storage/v1/object/{bucket}/{file_path}"
        headers = {
            "apikey": supabase_key,
            "Authorization": f"Bearer {supabase_key}",
            "Content-Type": "application/octet-stream"
        }
        
        with httpx.Client() as client:
            response = client.post(upload_url, headers=headers, content=file_data)
            
            if response.status_code != 200:
                print(f"Supabase returned error: {response.status_code} - {response.text}")
                response.raise_for_status()

        # 2. Return the public URL
        public_url = f"{supabase_url}/storage/v1/object/public/{bucket}/{file_path}"
        return public_url

    except Exception as e:
        print(f"Error uploading file to Supabase: {e}")
        raise e