/**
 * Builds DualScheduleConfiguration for the Daily Notification plugin.
 * Used for API-driven "New Activity" notifications (prefetch + notify).
 */

import type { DualScheduleConfiguration } from "@timesafari/daily-notification-plugin";

/** Matches `plugins.DailyNotification.networkConfig` in capacitor.config.ts */
const CONTENT_FETCH_NETWORK = {
  timeout: 30_000,
  retryAttempts: 3,
  retryDelay: 1_000,
} as const;

/**
 * Convert "HH:mm" (24h) to cron expression "minute hour * * *" (daily at that time).
 */
export function timeToCron(timeHHmm: string): string {
  const [h, m] = timeHHmm.split(":").map(Number);
  const hour = Math.max(0, Math.min(23, h ?? 0));
  const minute = Math.max(0, Math.min(59, m ?? 0));
  return `${minute} ${hour} * * *`;
}

/**
 * Cron for 5 minutes before the given "HH:mm" (so prefetch runs before the notification).
 */
export function timeToCronFiveMinutesBefore(timeHHmm: string): string {
  const [h, m] = timeHHmm.split(":").map(Number);
  let hour = Math.max(0, Math.min(23, h ?? 0));
  let minute = Math.max(0, Math.min(59, m ?? 0));
  minute -= 5;
  if (minute < 0) {
    minute += 60;
    hour -= 1;
    if (hour < 0) hour += 24;
  }
  return `${minute} ${hour} * * *`;
}

export interface DualScheduleConfigInput {
  /** Time in HH:mm (24h) for the user notification */
  notifyTime: string;
  /** Optional title; default "New Activity" */
  title?: string;
  /** Optional body; default describes API-driven content */
  body?: string;
}

/**
 * Build plugin DualScheduleConfiguration for scheduleDualNotification().
 * contentFetch runs 5 minutes before notifyTime; userNotification at notifyTime.
 */
export function buildDualScheduleConfig(
  input: DualScheduleConfigInput,
): DualScheduleConfiguration {
  const notifyTime = input.notifyTime || "09:00";
  const fetchCron = timeToCronFiveMinutesBefore(notifyTime);
  const notifyCron = timeToCron(notifyTime);
  return {
    contentFetch: {
      enabled: true,
      schedule: fetchCron,
      timeout: CONTENT_FETCH_NETWORK.timeout,
      retryAttempts: CONTENT_FETCH_NETWORK.retryAttempts,
      retryDelay: CONTENT_FETCH_NETWORK.retryDelay,
      callbacks: {},
    },
    userNotification: {
      enabled: true,
      schedule: notifyCron,
      title: input.title ?? "New Activity",
      body: input.body ?? "Check your starred projects and offers for updates.",
      sound: true,
      vibration: true,
      priority: "normal",
    },
    relationship: {
      autoLink: true,
      contentTimeout: 5 * 60 * 1000, // 5 minutes
      fallbackBehavior: "skip", // was "show_default"
    },
  };
}