from __future__ import annotations

import json
from functools import lru_cache
from pathlib import Path

CATALOG_PATH = Path(__file__).with_name("model_catalog.json")


@lru_cache(maxsize=1)
def load_catalog() -> dict[str, dict]:
    data = json.loads(CATALOG_PATH.read_text(encoding="utf-8"))
    return {item["id"]: item for item in data["models"]}


def catalog_choices() -> list[tuple[str, str]]:
    items = load_catalog().values()
    return [
        (f'{item["category"]} — {item["name"]}', item["id"])
        for item in items
    ]


def default_model_id() -> str:
    preferred = "model_bs_roformer_ep_317_sdr_12.9755.ckpt"
    for item in load_catalog().values():
        if item["model_filename"] == preferred:
            return item["id"]
    return next(iter(load_catalog()))