from datetime import datetime, timezone, timedelta
from decimal import Decimal
import re
import core.logger as logging

logger = logging.logger

def datetime_to_timestamp(date_str: str, is_utc: bool = False) -> 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
    :param is_utc: 是否为 UTC 时间；False 时按北京时间（UTC+8）解析
    :return: 毫秒级时间戳
    """
    if is_utc:
        dt = datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S').replace(tzinfo=timezone.utc)
    else:
        # 默认按北京时间（UTC+8）解析
        dt = datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S').replace(tzinfo=timezone(timedelta(hours=8)))
    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) -> str | None:
    """
    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

def transform_date_time_to_timestamp(date_time: int | str):
    """
    将日期时间转换为毫秒级timestamp
    """
    try:
        # 判断是否就是timestamp整型数据
        if isinstance(date_time, int):
            date_time = date_time
        # 判断是否为纯数字（UTC毫秒级timestamp）
        elif date_time.isdigit():
            date_time = int(date_time)
        else:
            date_time = check_date_time_format(date_time)
            if date_time is None:
                logger.error(f"日期时间格式错误: {date_time}")
                return None
            # 按北京时间字符串处理，转换为毫秒级timestamp
            date_time = datetime_to_timestamp(date_time)
        return date_time
    except Exception as e:
        logger.error(f"start参数解析失败: {e}")
        return None