"""Diagnostics export without a plotting dependency."""

from __future__ import annotations

import csv
import json
from dataclasses import asdict, is_dataclass
from pathlib import Path
from typing import Any

import numpy as np


def export_json(path: str | Path, value: Any) -> None:
    payload = asdict(value) if is_dataclass(value) else value
    Path(path).write_text(json.dumps(payload, indent=2, default=str), encoding="utf-8")


def export_tracking_csv(path: str | Path, measurements: list[Any]) -> None:
    if not measurements:
        Path(path).write_text("", encoding="utf-8")
        return
    rows = [asdict(item) for item in measurements]
    with Path(path).open("w", newline="", encoding="utf-8") as stream:
        writer = csv.DictWriter(stream, fieldnames=list(rows[0]))
        writer.writeheader()
        writer.writerows(rows)


def export_numpy(path: str | Path, **arrays: np.ndarray) -> None:
    np.savez(Path(path), **arrays)