import json
from pathlib import Path
from typing import Dict, Set, Any

def extract_plc_io(config: Dict[str, Any]) -> Dict[str, Dict[str, Set[str]]]:
    out: Dict[str, Dict[str, Set[str]]] = {}
    for plc in config.get("plcs", []):
        name = plc["name"]
        inputs: Set[str] = set()
        outputs: Set[str] = set()
        registers = plc.get("registers", {})
        for reg_list in registers.values():
            for r in reg_list:
                rid = r.get("id")
                rio = r.get("io")
                if rid and rio == "input":
                    inputs.add(rid)
                if rid and rio == "output":
                    outputs.add(rid)
        out[name] = {"inputs": inputs, "outputs": outputs}
    return out

def extract_hil_io(config: Dict[str, Any]) -> Dict[str, Dict[str, Set[str]]]:
    out: Dict[str, Dict[str, Set[str]]] = {}
    for hil in config.get("hils", []):
        name = hil["name"]
        inputs: Set[str] = set()
        outputs: Set[str] = set()
        for pv in hil.get("physical_values", []):
            n = pv.get("name")
            rio = pv.get("io")
            if n and rio == "input":
                inputs.add(n)
            if n and rio == "output":
                outputs.add(n)
        out[name] = {"inputs": inputs, "outputs": outputs}
    return out

def load_config(path: str) -> Dict[str, Any]:
    return json.loads(Path(path).read_text(encoding="utf-8"))