import * as Notifications from "expo-notifications";

// -- 初始化配置 --
Notifications.setNotificationHandler({
  handleNotification: async () => ({
    shouldShowAlert: true,
    shouldPlaySound: true,
    shouldSetBadge: false,
  }),
});

// -- 请求权限 --
export async function requestNotificationPermission(): Promise<boolean> {
  const { status } = await Notifications.requestPermissionsAsync();
  return status === "granted";
}

// -- 预定提醒通知 --
export async function scheduleTodoReminder(todoId: number, todoName: string, remindAt: string) {
  if (!remindAt) return null;

  const triggerDate = new Date(remindAt);
  if (triggerDate <= new Date()) return null; // 时间已过，不预定

  return Notifications.scheduleNotificationAsync({
    content: {
      title: "⏰ 待办提醒",
      body: `「${todoName}」该处理了`,
      data: { todoId, type: "todo_reminder" },
    },
    trigger: { type: Notifications.SchedulableTriggerInputTypes.DATE, date: triggerDate },
  });
}

// -- 取消提醒通知 --
export async function cancelTodoReminder(identifier: string) {
  await Notifications.cancelScheduledNotificationAsync(identifier);
}

// -- 取消某个todo的所有提醒 --
export async function cancelTodoReminders(todoId: number) {
  const scheduled = await Notifications.getAllScheduledNotificationsAsync();
  for (const n of scheduled) {
    if ((n.content.data as any)?.todoId === todoId) {
      await Notifications.cancelScheduledNotificationAsync(n.identifier);
    }
  }
}