"""技能级文件日志。"""
import logging
import os
import sys
from logging.handlers import TimedRotatingFileHandler

from util.constants import LOG_LOGGER_NAME, SKILL_SLUG
from util.runtime_paths import get_skill_logs_dir


def _skill_log_file_path() -> str:
    """主日志文件路径；可由 JIANGCHANG_ACCOUNT_MANAGER_LOG_FILE 覆盖为绝对路径。"""
    override = (os.getenv("JIANGCHANG_ACCOUNT_MANAGER_LOG_FILE") or "").strip()
    if override:
        parent = os.path.dirname(os.path.abspath(override))
        if parent:
            os.makedirs(parent, exist_ok=True)
        return os.path.abspath(override)
    return os.path.join(get_skill_logs_dir(), f"{SKILL_SLUG}.log")


def _log_level_from_env() -> int:
    v = (os.getenv("JIANGCHANG_LOG_LEVEL") or "INFO").strip().upper()
    return getattr(logging, v, None) or logging.INFO


def get_skill_log_file_path() -> str:
    """主日志文件绝对路径（与 get_skill_logger 写入文件一致）。"""
    return _skill_log_file_path()


def get_skill_logger() -> logging.Logger:
    """
    技能级日志：单文件按日切分（TimedRotatingFileHandler midnight），UTF-8。
    环境变量：JIANGCHANG_LOG_LEVEL（默认 INFO）、JIANGCHANG_LOG_TO_STDERR=1 时 WARNING+ 同步 stderr、
    JIANGCHANG_ACCOUNT_MANAGER_LOG_FILE 覆盖日志文件路径。
    """
    log = logging.getLogger(LOG_LOGGER_NAME)
    if log.handlers:
        return log
    log.setLevel(_log_level_from_env())
    path = _skill_log_file_path()
    fh = TimedRotatingFileHandler(
        path,
        when="midnight",
        interval=1,
        backupCount=30,
        encoding="utf-8",
        delay=True,
    )
    fh.setFormatter(
        logging.Formatter(
            "%(asctime)s | %(levelname)-8s | %(name)s | %(message)s",
            datefmt="%Y-%m-%dT%H:%M:%S",
        )
    )
    log.addHandler(fh)
    if (os.getenv("JIANGCHANG_LOG_TO_STDERR") or "").strip().lower() in (
        "1",
        "true",
        "yes",
        "on",
    ):
        sh = logging.StreamHandler(sys.stderr)
        sh.setLevel(logging.WARNING)
        sh.setFormatter(fh.formatter)
        log.addHandler(sh)
    log.propagate = False
    return log