import re
from datetime import datetime


# 处理金额类数据
def handle_decimal(string):
    if not string:
        return ""
    string = re.sub(r'[^0-9.]', '', string)
    if "." not in string:
        return string
    front, back = string.rsplit('.', 1)
    front = front.replace(".", "")
    front = front[-16:]
    if back:
        back = "." + back
    return front + back


# 处理日期类数据
def handle_date(string):
    if not string:
        return ""

    string = string.replace("年", "-").replace("月", "-").replace("日", "").replace("/", "-").replace(".", "-")
    string = re.sub(r'[^0-9-]', '', string)
    length = len(string)
    if length > 8 and "-" not in string:
        string = string[:8]
    elif length > 10 and "-" in string:
        string = string[:10]
    if is_valid_date_format(string):
        return string
    else:
        return ""


# 判断是否是合法的日期格式
def is_valid_date_format(date_str):
    if len(date_str) < 6:
        return False

    # 定义可能的日期格式
    formats = [
        # yyyy-MM-dd
        '%Y-%m-%d',
        # yy-MM-dd
        '%y-%m-%d',
        # yyyyMMdd
        '%Y%m%d',
        # yyMMdd
        '%y%m%d',
    ]

    # 遍历所有格式，尝试解析日期
    for fmt in formats:
        try:
            datetime.strptime(date_str, fmt)
            return True
        except ValueError:
            pass

    return False


def handle_department(string):
    result = []
    if not string:
        return result
    result.append(string)
    string_without_num = re.sub(r'\d|一|二|三|四|五|六|七|八|九|十', '', string)
    if string_without_num != string:
        result.append(string_without_num)
    string_without_brackets = re.sub(r'\([^()]*\)|\[[^\[\]]*\]|\{[^\{\}]*\}|（[^（）]*）', "", string_without_num)
    if string_without_brackets != string_without_num:
        result.append(string_without_brackets)
    pure_string = string_without_brackets.split("科")[0] + "科"
    if pure_string != string_without_brackets:
        result.append(pure_string)
    return result


# 处理姓名类数据
def handle_name(string):
    if not string:
        return ""
    return re.sub(r'[^⺀-鿿·]', '', string)