import base64, urllib.request, uuid
from datetime import datetime, timedelta, timezone

USER, PASS = "8612345678900", "XXXX-XXXX-XXXX-XXXX"
PRINCIPAL_ID = "12112653923"
cred = base64.b64encode(f"{USER}:{PASS}".encode()).decode()

def add_reminder(summary: str, when: datetime, minutes: int = 30):
    """在'个人'日历建一条事件，when 时刻弹通知，持续 minutes 分钟"""
    now = datetime.now(timezone.utc)
    if when.tzinfo is None:
        when = when.replace(tzinfo=timezone(timedelta(hours=8)))  # 默认按北京时间
    s, e = when.astimezone(timezone.utc), when.astimezone(timezone.utc) + timedelta(minutes=minutes)
    fmt = lambda d: d.strftime("%Y%m%dT%H%M%SZ")
    uid = f"hermes-{uuid.uuid4().hex[:12]}"
    ics = (f"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Hermes//CN\r\n"
           f"BEGIN:VEVENT\r\nUID:{uid}\r\nDTSTAMP:{fmt(now)}\r\n"
           f"DTSTART:{fmt(s)}\r\nDTEND:{fmt(e)}\r\nSUMMARY:{summary}\r\n"
           f"BEGIN:VALARM\r\nTRIGGER:-PT0M\r\nACTION:DISPLAY\r\n"
           f"DESCRIPTION:提醒\r\nEND:VALARM\r\nEND:VEVENT\r\nEND:VCALENDAR")
    url = f"https://caldav.icloud.com/{PRINCIPAL_ID}/calendars/home/{uid}.ics"
    req = urllib.request.Request(url, data=ics.encode(), method="PUT",
        headers={"Authorization": f"Basic {cred}",
                 "Content-Type": "text/calendar; charset=utf-8",
                 "If-None-Match": "*"})
    urllib.request.urlopen(req, timeout=15)
    return uid

if __name__ == "__main__":
    import sys
    if len(sys.argv) >= 3:
        print("已写入:", add_reminder(sys.argv[1], datetime.strptime(sys.argv[2], "%Y-%m-%d %H:%M")))
    else:
        print('用法: python add_reminder.py "<标题>" "<YYYY-MM-DD HH:MM>"')

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Hermes//CN
BEGIN:VEVENT
UID:my-reminder-001
DTSTAMP:20260909T050000Z
DTSTART:20260909T070000Z
DTEND:20260909T073000Z
SUMMARY:取快递
BEGIN:VALARM
TRIGGER:-PT0M
ACTION:DISPLAY
DESCRIPTION:提醒
END:VALARM
END:VEVENT
END:VCALENDAR

const USER = "用户名", PASS = "密码", PID = "{PRINCIPAL_ID}";
const auth = Buffer.from(`${USER}:${PASS}`).toString("base64");
const pad = n => String(n).padStart(2, "0");
const fmt = d => d.getUTCFullYear() + pad(d.getUTCMonth()+1) + pad(d.getUTCDate())
  + "T" + pad(d.getUTCHours()) + pad(d.getUTCMinutes()) + pad(d.getUTCSeconds()) + "Z";

async function addReminder(summary, when, minutes = 30) {
  const now = new Date(), start = when, end = new Date(when.getTime() + minutes*60000);
  const uid = "hermes-" + Math.random().toString(36).slice(2, 14);
  const ics = ["BEGIN:VCALENDAR","VERSION:2.0","PRODID:-//Hermes//CN","BEGIN:VEVENT",
    `UID:${uid}`, `DTSTAMP:${fmt(now)}`, `DTSTART:${fmt(start)}`, `DTEND:${fmt(end)}`,
    `SUMMARY:${summary}`,"BEGIN:VALARM","TRIGGER:-PT0M","ACTION:DISPLAY",
    "DESCRIPTION:提醒","END:VALARM","END:VEVENT","END:VCALENDAR"].join("\r\n");
  const res = await fetch(`https://caldav.icloud.com/${PID}/calendars/home/${uid}.ics`, {
    method: "PUT",
    headers: { Authorization: `Basic ${auth}`, "Content-Type": "text/calendar; charset=utf-8", "If-None-Match": "*" },
    body: ics });
  if (res.status !== 201) throw new Error("HTTP " + res.status);
  return uid;
}

$pair = "用户名:密码"
$auth = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes($pair))
$uid  = "my-reminder-" + (Get-Random -Maximum 99999)
$PID_ = "PRINCIPAL_ID"

$nl  = [char]13 + [char]10   # CRLF 行尾，必须
$ics = ("BEGIN:VCALENDAR","VERSION:2.0","PRODID:-//Hermes//CN",
        "BEGIN:VEVENT","UID:$uid","DTSTAMP:20260909T050000Z",
        "DTSTART:20260909T070000Z","DTEND:20260909T073000Z",
        "SUMMARY:取快递","BEGIN:VALARM","TRIGGER:-PT0M","ACTION:DISPLAY",
        "DESCRIPTION:提醒","END:VALARM","END:VEVENT","END:VCALENDAR") -join $nl

Invoke-WebRequest -Uri "https://caldav.icloud.com/$PID_/calendars/home/$uid.ics" `
  -Method Put -Headers @{Authorization="Basic $auth"; "If-None-Match"="*"} `
  -ContentType "text/calendar; charset=utf-8" -Body $ics -UseBasicParsing
# StatusCode 201 = 成功