#this was not the original storage py file, and was created for Huggging Face. If this fails consider using storage_local.py

import os
import json
import streamlit as st
from google.cloud import storage
from google.oauth2 import service_account

# ✅ YOUR BUCKET NAME
BUCKET_NAME = "piranaware20251227841ph"

def get_storage_client():
    """
    Authenticates with Google Cloud.
    Priority:
    1. Local File (Codespaces)
    2. Environment Variable (Hugging Face Docker)
    3. Streamlit Secrets (Streamlit Cloud fallback)
    """
    # 1. Local Dev: Check for local file
    if os.path.exists("gcp_key.json"):
        return storage.Client.from_service_account_json("gcp_key.json")

    # 2. Hugging Face / Docker: Check Environment Variable
    # In HF, secrets are stored as Env Vars, so we parse the JSON string.
    env_key = os.environ.get("gcp_service_account")
    if env_key:
        try:
            creds_dict = json.loads(env_key)
            creds = service_account.Credentials.from_service_account_info(creds_dict)
            return storage.Client(credentials=creds)
        except Exception as e:
            st.error(f"⚠️ Credential Error: {e}")
            return None

    # 3. Streamlit Cloud: Check Secrets (Fallback)
    if "gcp_service_account" in st.secrets:
        try:
            creds_dict = dict(st.secrets["gcp_service_account"])
            creds = service_account.Credentials.from_service_account_info(creds_dict)
            return storage.Client(credentials=creds)
        except Exception:
            pass
    
    # 4. If nothing works
    st.error("⚠️ No Google Cloud credentials found. Cannot save/load models.")
    return None

def upload_file(local_path, boat_id, filename):
    client = get_storage_client()
    if not client: return False

    try:
        bucket = client.bucket(BUCKET_NAME)
        # Creates folder structure: boat_id/filename
        blob_name = f"{boat_id}/{filename}"
        blob = bucket.blob(blob_name)
        
        blob.upload_from_filename(local_path)
        return True
    except Exception as e:
        st.error(f"Upload failed: {e}")
        return False

def download_file(boat_id, filename, local_dest):
    client = get_storage_client()
    if not client: return False

    try:
        bucket = client.bucket(BUCKET_NAME)
        blob_name = f"{boat_id}/{filename}"
        blob = bucket.blob(blob_name)
        
        if not blob.exists():
            return False
            
        blob.download_to_filename(local_dest)
        return True
    except Exception as e:
        st.error(f"Download failed: {e}")
        return False