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:
        front = string
        back = ""
    else:
        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)
    string = string.strip("-")
    if "-" in string:
        dash_count = string.count("-")
        if dash_count > 2:
            third_dash_index = string.find("-", string.find("-", string.find("-") + 1) + 1)
            string = string[:third_dash_index]
        day = string[string.rindex("-") + 1:]
        if len(day) > 2:
            string = string[:2 - len(day)]
    else:
        if len(string) > 8:
            string = string[:8]

    if len(string) < 6:
        return ""

    # 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:
            date = datetime.strptime(string, fmt)
            # 限定日期的年份范围
            if 2000 < date.year < 2100:
                return date.strftime("%Y-%m-%d")
            continue
        except ValueError:
            continue

    return ""


def handle_hospital(string):
    if not string:
        return ""
    return string[:255]


def handle_department(string):
    if not string:
        return ""
    return string[:255]


def parse_department(string):
    result = []
    if not string:
        return result
    result.append(handle_department(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(handle_department(string_without_num))
    string_without_brackets = re.sub(r'\([^()]*\)|\[[^\[\]]*\]|\{[^\{\}]*\}|（[^（）]*）', "", string_without_num)
    if string_without_brackets != string_without_num:
        result.append(handle_department(string_without_brackets))
    pure_string = string_without_brackets.split("科")[0] + "科"
    if pure_string != string_without_brackets:
        result.append(handle_department(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)[:30]


# 处理医保类型数据
def handle_insurance_type(string):
    if not string:
        return ""
    return string.replace(":", "").replace("：", "")[:255]


# 处理原始数据
def handle_original_data(string):
    if not string:
        return ""
    # 防止过长存入数据库失败
    return string[:255]


# 处理id类数据
def handle_id(string):
    if not string:
        return ""
    # 防止过长存入数据库失败
    return string[:50]


# 处理年龄类数据
def handle_age(string):
    if not string:
        return ""
    string = string.split("岁")[0]
    num = re.sub(r'\D', '', string)
    return num[-3:]