from datetime import datetime, timedelta
from typing import List, Dict, Optional, Any
from loguru import logger

    
def safe_float(value, default=0.0):
    """安全转换为float，处理None和空值"""
    if value is None:
        return default
    try:
        return float(value)
    except (ValueError, TypeError):
        return default
    
def safe_int(value, default=0):
    """安全转换为int"""
    if value is None:
        return default
    try:
        return int(float(value))
    except (ValueError, TypeError):
        return default

def safe_str(self, value: Any, default: str = '') -> str:
    """安全转换为str"""
    if value is None:
        return ""
    try:
        return str(value)
    except Exception as e:
        logger.error(f"safe_str error: {e}")
        return ""

def convert_timestamp(timestamp, return_type='str', format_str='%Y-%m-%d %H:%M:%S'):
    """
    时间戳转换函数，支持多种返回格式
    
    Args:
        timestamp: 时间戳（支持整数、浮点数、字符串）
        return_type: 返回类型 'str'/'datetime'/'dict'
        format_str: 当return_type='str'时的格式字符串
    
    Returns:
        根据return_type返回不同格式的数据
    """
    try:
        # 转换为浮点数
        if isinstance(timestamp, str):
            timestamp = float(timestamp)
        else:
            timestamp = float(timestamp)
        
        # 判断时间戳精度
        original_timestamp = timestamp
        
        # 精确判断逻辑
        if timestamp > 4102444800000:  # 2100-01-01 的毫秒级时间戳
            # 可能是微秒级，转换为秒级
            timestamp = timestamp / 1000000
            precision = 'microseconds'
        elif timestamp > 4102444800:   # 2100-01-01 的秒级时间戳
            # 毫秒级时间戳
            timestamp = timestamp / 1000
            precision = 'milliseconds'
        else:
            # 秒级时间戳
            precision = 'seconds'
        
        # 转换为 datetime 对象
        dt = datetime.fromtimestamp(timestamp)
        
        # 根据返回类型返回不同格式
        if return_type == 'datetime':
            return dt
        elif return_type == 'dict':
            return {
                'datetime': dt,
                'formatted': dt.strftime(format_str),
                'precision': precision,
                'original_timestamp': original_timestamp,
                'converted_timestamp': timestamp
            }
        else:  # 默认返回字符串
            return dt.strftime(format_str)
        
    except (ValueError, TypeError, OSError) as e:
        logger.error(f"时间戳转换失败: {timestamp}, 错误: {e}")
        return None
    
def timestamp(unit='seconds'):
    """
    简化版时间戳获取
    
    Args:
        unit: 's'/'ms'/'us' 或 'seconds'/'milliseconds'/'microseconds'
    
    Returns:
        int: 时间戳
    """
    current = time.time()
    
    unit_map = {
        's': 1, 'seconds': 1,
        'ms': 1000, 'milliseconds': 1000,
        'us': 1000000, 'microseconds': 1000000
    }
    
    multiplier = unit_map.get(unit.lower(), 1)
    return int(current * multiplier)

# 别名函数
def ts(unit='seconds'):
    """timestamp的别名"""
    return timestamp(unit)