import os
import sys

BACKEND_HOST = os.getenv("BACKEND_HOST", "https://api-dev.gptbase.ai")
ASSISTANT_ID = os.getenv("ASSISTANT_ID", "")

if not ASSISTANT_ID:
    print("Error: ASSISTANT_ID environment variable is not set")
    sys.exit(1)

if len(sys.argv) < 2:
    print(f"Usage: python3 {sys.argv[0]} <file_path>")
    print(f"Example: python3 {sys.argv[0]} /workspace/index.html")
    sys.exit(1)

file_path = os.path.abspath(sys.argv[1])

workspace_root = "/workspace"
if not file_path.startswith(workspace_root):
    print(f"Error: path must be under {workspace_root}, got: {file_path}")
    sys.exit(1)

relative_path = file_path[len(workspace_root):]  # e.g. "/css/style.css"
base_url = f"{BACKEND_HOST.rstrip('/')}/robot-assets/{ASSISTANT_ID}"
print(f"{base_url}{relative_path}")