from __future__ import annotations

import hashlib
import json
from pathlib import Path
from typing import Any, Iterable


def canonical_json(value: Any) -> str:
    return json.dumps(value, ensure_ascii=False, sort_keys=True, separators=(",", ":"))


def sha256_json(value: Any) -> str:
    return hashlib.sha256(canonical_json(value).encode("utf-8")).hexdigest()


def sha256_file(path: Path) -> str:
    digest = hashlib.sha256()
    with path.open("rb") as stream:
        for chunk in iter(lambda: stream.read(1024 * 1024), b""):
            digest.update(chunk)
    return digest.hexdigest()


def read_json(path: Path) -> Any:
    with path.open(encoding="utf-8") as stream:
        return json.load(stream)


def write_json(path: Path, value: Any) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("w", encoding="utf-8") as stream:
        json.dump(value, stream, ensure_ascii=False, indent=2, sort_keys=True)
        stream.write("\n")


def append_jsonl(path: Path, values: Iterable[dict[str, Any]]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("a", encoding="utf-8") as stream:
        for value in values:
            stream.write(canonical_json(value) + "\n")


def write_jsonl(path: Path, values: Iterable[dict[str, Any]]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("w", encoding="utf-8") as stream:
        for value in values:
            stream.write(canonical_json(value) + "\n")


def read_jsonl(path: Path) -> list[dict[str, Any]]:
    if not path.exists():
        return []
    rows = []
    with path.open(encoding="utf-8") as stream:
        for line_number, line in enumerate(stream, 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