import os
import sys
from pathlib import Path
from datetime import datetime, timedelta
import logging
from logging.handlers import RotatingFileHandler
import inspect
try:
    import win32gui
    import win32con
    WIN32_AVAILABLE = True
except ImportError:
    WIN32_AVAILABLE = False

from PubLibrary.InifileHelper import IniRead

# ===================== 新增：获取 EXE 同级目录 =====================
def get_app_root():
    """获取 runDecoder.exe 所在的真实根目录（兼容 onefile / standalone）"""
    if getattr(sys, 'frozen', False):
        # Nuitka / PyInstaller 打包后走这里
        app_path = sys.executable
    else:
        # 本地源码运行时，取当前脚本目录
        app_path = os.path.abspath(__file__)
    return os.path.dirname(app_path)

# 程序根目录（exe 同级）
APP_ROOT = Path(get_app_root())
# 日志文件夹名：exe 同级下 logs 目录
DEFAULT_LOG_DIR = APP_ROOT / "logs"

# ===================== 读取 [algo_log] 配置 =====================
# 文件日志
FILE_LOG_ENABLE = IniRead("algo_log", "file_log_enable", "true").lower() == "true"
FILE_LOG_LEVEL = IniRead("algo_log", "file_log_level", "DEBUG").upper()
# 优先级：配置文件 > 默认exe同级logs
CFG_LOG_PATH = IniRead("algo_log", "log_path", "").strip()
if CFG_LOG_PATH == "exe":
    LOG_DIR = DEFAULT_LOG_DIR
else:
    LOG_DIR = Path(CFG_LOG_PATH)

LOG_RETENTION_DAYS = int(IniRead("algo_log", "retention_days", 3))

# 控制台日志 + 黑框控制
CONSOLE_ENABLE = IniRead("algo_log", "console_enable", "true").lower() == "true"
CONSOLE_SHOW_WINDOW = IniRead("algo_log", "console_show_window", "true").lower() == "true"
CONSOLE_LOG_LEVEL = IniRead("algo_log", "console_log_level", "INFO").upper()

# ===================== 全局常量与缓存 =====================
log_once_cache = set()
logger_cache = {}
LOG_FILE_PREFIX = 'algo_log_'
# 确保日志目录存在
LOG_DIR.mkdir(parents=True, exist_ok=True)
LOG_DIR_STR = str(LOG_DIR) + "\\"

# 日志格式
LOG_FORMAT = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
DATE_FORMAT = '%Y-%m-%d %H:%M:%S'

# 日志级别映射
LEVEL_MAP = {
    "DEBUG": logging.DEBUG,
    "INFO": logging.INFO,
    "WARNING": logging.WARNING,
    "ERROR": logging.ERROR,
    "FATAL": logging.FATAL
}
FILE_LOG_LEVEL_INT = LEVEL_MAP.get(FILE_LOG_LEVEL, logging.INFO)
CONSOLE_LOG_LEVEL_INT = LEVEL_MAP.get(CONSOLE_LOG_LEVEL, logging.INFO)

# ===================== Windows 控制台黑框显示/隐藏 =====================
def control_console_window():
    if not sys.platform.startswith("win") or not WIN32_AVAILABLE:
        return
    try:
        hwnd = win32gui.GetForegroundWindow()
        if CONSOLE_SHOW_WINDOW:
            win32gui.ShowWindow(hwnd, win32con.SW_SHOW)
        else:
            win32gui.ShowWindow(hwnd, win32con.SW_HIDE)
    except Exception:
        pass

control_console_window()

# ===================== 清理过期日志 =====================
def clean_old_logs():
    try:
        if not LOG_DIR.exists():
            return
        expire_date = datetime.now() - timedelta(days=LOG_RETENTION_DAYS)
        for filename in os.listdir(LOG_DIR):
            if not (filename.startswith(LOG_FILE_PREFIX) and filename.endswith('.log')):
                continue
            date_str = filename[len(LOG_FILE_PREFIX):-4]
            try:
                file_date = datetime.strptime(date_str, '%Y-%m-%d')
                if file_date < expire_date:
                    file_path = LOG_DIR / filename
                    os.remove(file_path)
            except ValueError:
                continue
    except Exception:
        pass

# ===================== 初始化日志器 =====================
def init_module_logger(logger_name):
    if logger_name in logger_cache:
        return logger_cache[logger_name]

    clean_old_logs()

    logger = logging.getLogger(logger_name)
    logger.setLevel(logging.DEBUG)
    if logger.handlers:
        logger_cache[logger_name] = logger
        return logger

    formatter = logging.Formatter(LOG_FORMAT, datefmt=DATE_FORMAT)

    # 文件日志
    if FILE_LOG_ENABLE:
        current_date = datetime.now().strftime("%Y-%m-%d")
        log_file = LOG_DIR / f"{LOG_FILE_PREFIX}{current_date}.log"
        file_handler = RotatingFileHandler(
            log_file,
            maxBytes=10 * 1024 * 1024,
            backupCount=10,
            encoding='utf-8'
        )
        file_handler.setFormatter(formatter)
        file_handler.setLevel(FILE_LOG_LEVEL_INT)
        logger.addHandler(file_handler)

    # 控制台日志
    if CONSOLE_ENABLE:
        console_handler = logging.StreamHandler(sys.stdout)
        console_handler.setFormatter(formatter)
        console_handler.setLevel(CONSOLE_LOG_LEVEL_INT)
        logger.addHandler(console_handler)

    logger_cache[logger_name] = logger
    return logger

# ===================== 对外日志入口函数 =====================
def algo_log(content, level="INFO", record_once=False):
    frame = inspect.currentframe()
    if frame:
        frame = frame.f_back.f_back
    file_name = os.path.basename(frame.f_code.co_filename) if frame else "unknown"

    logger = init_module_logger(file_name)

    if record_once:
        log_key = f"{level.upper()}_{content}"
        if log_key in log_once_cache:
            return
        log_once_cache.add(log_key)

    level_upper = level.upper()
    log_func_map = {
        "DEBUG": logger.debug,
        "INFO": logger.info,
        "WARNING": logger.warning,
        "ERROR": logger.error,
        "FATAL": logger.fatal
    }
    log_func = log_func_map.get(level_upper, logger.info)
    log_func(content)