from datetime import datetime, timezone, timedelta
from decimal import Decimal
import re

def datetime_to_timestamp(date_str: str) -> int:
    """
    将日期字符串（如 '2023-01-01 12:00:00'）直接转换为毫秒级时间戳
    :param date_str: 形如 '2023-01-01 12:00:00' 的日期时间字符串
    :return: 毫秒级时间戳
    """
    dt = datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S')
    return int(dt.timestamp() * 1000)

def timestamp_to_datetime(timestamp: int) -> str:
    """
    将时间戳转换为日期字符串
    请考虑日期字符串位于北京时区
    :param timestamp: 以毫秒为单位的时间戳
    :return: 形如 '2023-01-01 12:00:00' 的日期时间字符串
    """
    dt = datetime.fromtimestamp(timestamp / 1000, timezone(timedelta(hours=8)))
    return dt.strftime('%Y-%m-%d %H:%M:%S')

def transform_data_type(data: dict):
    """
    遍历字典，将所有Decimal类型的值转换为float类型
    """
    for key, value in data.items():
        if isinstance(value, Decimal):
            data[key] = float(value)
    return data


def check_date_time_format(date_time: str) -> bool:
    """
    检查日期时间格式是否正确
    """
    if re.match(r'^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$', date_time):
        return date_time
    elif re.match(r'^\d{4}-\d{2}-\d{2}$', date_time):
        return date_time + " 00:00:00"
    elif re.match(r'^\d{4}\d{2}\d{2}$', date_time):
        return f"{date_time[0:4]}-{date_time[4:6]}-{date_time[6:8]} 00:00:00"
    else:
        return None