from __future__ import annotations

import json
from pathlib import Path
from typing import Iterable


def read_json(path: str | Path):
    return json.loads(Path(path).read_text(encoding="utf-8"))


def write_json(path: str | Path, value) -> None:
    target = Path(path)
    target.parent.mkdir(parents=True, exist_ok=True)
    target.write_text(
        json.dumps(value, ensure_ascii=False, indent=2) + "\n",
        encoding="utf-8",
    )


def read_jsonl(path: str | Path) -> list[dict]:
    rows = []
    with Path(path).open(encoding="utf-8") as handle:
        for line_number, line in enumerate(handle, start=1):
            if not line.strip():
                continue
            try:
                rows.append(json.loads(line))
            except json.JSONDecodeError as exc:
                raise ValueError(f"Invalid JSONL at {path}:{line_number}: {exc}") from exc
    return rows


def write_jsonl(path: str | Path, rows: Iterable[dict]) -> None:
    target = Path(path)
    target.parent.mkdir(parents=True, exist_ok=True)
    temporary = target.with_suffix(target.suffix + ".tmp")
    with temporary.open("w", encoding="utf-8") as handle:
        for row in rows:
            handle.write(json.dumps(row, ensure_ascii=False) + "\n")
    temporary.replace(target)


def append_jsonl(path: str | Path, row: dict) -> None:
    target = Path(path)
    target.parent.mkdir(parents=True, exist_ok=True)
    with target.open("a", encoding="utf-8") as handle:
        handle.write(json.dumps(row, ensure_ascii=False) + "\n")


def metadata_path(dataset_root: str | Path) -> Path:
    return Path(dataset_root) / "data" / "test" / "metadata.jsonl"


def image_path(dataset_root: str | Path, row: dict) -> Path:
    return Path(dataset_root) / "data" / "test" / row["file_name"]