import json
import logging
from pathlib import Path
from typing import Dict, Iterable, List


def ensure_dirs(paths: Iterable[Path]) -> None:
    for path in paths:
        path.mkdir(parents=True, exist_ok=True)


def setup_logger(name: str, log_file: Path, level: int = logging.INFO) -> logging.Logger:
    log_file.parent.mkdir(parents=True, exist_ok=True)
    logger = logging.getLogger(name)
    logger.setLevel(level)

    if logger.handlers:
        return logger

    formatter = logging.Formatter(
        fmt="%(asctime)s | %(levelname)s | %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    file_handler = logging.FileHandler(log_file, encoding="utf-8")
    file_handler.setFormatter(formatter)
    logger.addHandler(file_handler)

    stream_handler = logging.StreamHandler()
    stream_handler.setFormatter(formatter)
    logger.addHandler(stream_handler)

    return logger


def write_jsonl(path: Path, rows: List[Dict[str, str]]) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    with path.open("w", encoding="utf-8") as f:
        for row in rows:
            f.write(json.dumps(row, ensure_ascii=False) + "\n")


def read_jsonl(path: Path) -> List[Dict[str, str]]:
    rows: List[Dict[str, str]] = []
    with path.open("r", encoding="utf-8") as f:
        for line in f:
            line = line.strip()
            if not line:
                continue
            rows.append(json.loads(line))
    return rows