"""nsv_io.py — чтение/запись .nsv диалоговых файлов через пакет nsv."""

from pathlib import Path

import nsv

FIELDS = ("line", "speaker", "pcm", "text", "translated_text")


def load_nsv_file(path: Path) -> list[dict]:
    with open(path, "r", encoding="utf-8", newline="") as f:
        it = iter(nsv.load(f))
    next(it, None)
    entries = []
    for line, speaker, pcm, text, translated_text in it:
        entries.append({
            "line": int(line or 0),
            "speaker": speaker or None,
            "pcm": pcm or None,
            "text": text,
            "translated_text": translated_text,
        })
    return entries


def save_nsv_file(path: Path, entries: list[dict]) -> None:
    rows = [list(FIELDS)]
    for e in entries:
        rows.append([
            str(e.get("line", "")),
            e.get("speaker") or "",
            e.get("pcm") or "",
            e.get("text", ""),
            e.get("translated_text", ""),
        ])
    with open(path, "w", encoding="utf-8", newline="") as f:
        nsv.dump(rows, f)