# 删除lolipop邮箱中早于指定日期的邮件
# 使用imaplib库连接到lolipop邮箱，并删除早于指定日期的邮件
# python 3.10+ 
# 运行 python app.py

import imaplib
import time
from datetime import datetime

IMAP_HOST = "imap.lolipop.jp" # 邮箱服务器地址
EMAIL = "" # 邮箱地址
PASSWORD = "" # 邮箱密码
MAX_RETRIES = 5  # 最多重试 5 次

# 设置截止日期
# 格式：2025,04,20 前的邮件进行删除不包含2025,04,20
date_cutoff = datetime(2025, 4, 20).strftime("%d-%b-%Y")

def connect_with_retry():
    for attempt in range(1, MAX_RETRIES + 1):
        try:
            imap = imaplib.IMAP4_SSL(IMAP_HOST)
            imap.login(EMAIL, PASSWORD)
            print(f"✅ 第 {attempt} 次尝试连接成功")
            return imap
        except imaplib.IMAP4.error as e:
            if b"Maximum number of connections" in str(e).encode():
                print(f"⚠️ 第 {attempt} 次连接失败（连接数超限），等待 30 秒后重试...")
                time.sleep(30)
            else:
                raise  # 其他错误直接抛出
    raise Exception("❌ 多次连接失败，请稍后重试。")

imap = None
try:
    imap = connect_with_retry()

    status, count_bytes = imap.select("INBOX")
    if status != "OK":
        print("❌ 无法选择邮箱文件夹")
        exit()

    total_mail_count = int(count_bytes[0])
    print(f"📬 当前邮箱邮件总数：{total_mail_count}")

    status, data = imap.search(None, f'(BEFORE {date_cutoff})')
    if status == "OK":
        mail_ids = data[0].split()
        print(f"🗑️ 找到 {len(mail_ids)} 封待删除邮件（早于 {date_cutoff}）")

        for i, num in enumerate(mail_ids, start=1):
            print(f"  ➤ 正在删除第 {i} 封邮件（ID: {num.decode()})")
            imap.store(num, '+FLAGS', '\\Deleted')

        imap.expunge()
        print("✅ 删除完成")
    else:
        print("❌ 搜索失败")

except Exception as e:
    print(f"发生异常：{e}")

finally:
    try:
        if imap is not None:
            imap.logout()
    except:
        pass