"""
验证器模块
"""
import re
from datetime import date
from typing import Tuple, Optional


def validate_code_format(code: str) -> Tuple[bool, str]:
    """
    验证代码格式
    
    Returns:
        (是否有效, 错误信息)
    """
    if not code:
        return False, "代码不能为空"
    
    # 股票代码格式: 000001.SZ, 600000.SH
    stock_pattern = r"^\d{6}\.(SZ|SH|BJ)$"
    
    # 期货代码格式: IF2501.CFE
    future_pattern = r"^[A-Z]{1,2}\d{4}\.CFE$"
    
    if re.match(stock_pattern, code):
        return True, ""
    
    if re.match(future_pattern, code):
        return True, ""
    
    return False, f"无效的代码格式: {code}"


def validate_date_range(start_date: date, end_date: date) -> Tuple[bool, str]:
    """
    验证日期范围
    
    Returns:
        (是否有效, 错误信息)
    """
    if start_date > end_date:
        return False, "开始日期不能晚于结束日期"
    
    # 检查日期范围是否合理（不超过5年）
    from datetime import timedelta
    if (end_date - start_date).days > 365 * 5:
        return False, "日期范围不能超过5年"
    
    return True, ""


def validate_period_type(period: str) -> Tuple[bool, str]:
    """
    验证周期类型
    
    Returns:
        (是否有效, 错误信息)
    """
    valid_periods = ["daily", "min1", "min5", "min15", "min30", "min60"]
    
    if period not in valid_periods:
        return False, f"无效的周期类型: {period}，有效值: {', '.join(valid_periods)}"
    
    return True, ""


def validate_security_type(security_type: str) -> Tuple[bool, str]:
    """
    验证证券类型
    
    Returns:
        (是否有效, 错误信息)
    """
    valid_types = ["stock", "future", "index", "etf", "kzz"]
    
    if security_type not in valid_types:
        return False, f"无效的证券类型: {security_type}，有效值: {', '.join(valid_types)}"
    
    return True, ""