/**
 * Telegram interaction policy hooks.
 * Policy defaults: keep vertical swipes enabled; enable closing confirmation only
 * for stateful flows where user input can be lost.
 */

"use client";

import { useEffect } from "react";

function getTelegramWebApp(): {
  enableVerticalSwipes?: () => void;
  disableVerticalSwipes?: () => void;
  enableClosingConfirmation?: () => void;
  disableClosingConfirmation?: () => void;
} | null {
  if (typeof window === "undefined") return null;
  return (window as unknown as { Telegram?: { WebApp?: unknown } }).Telegram
    ?.WebApp as {
    enableVerticalSwipes?: () => void;
    disableVerticalSwipes?: () => void;
    enableClosingConfirmation?: () => void;
    disableClosingConfirmation?: () => void;
  } | null;
}

/**
 * Keep Telegram vertical swipes enabled by default.
 * Disable only for screens with conflicting in-app gestures.
 */
export function useTelegramVerticalSwipePolicy(disableVerticalSwipes: boolean) {
  useEffect(() => {
    const webApp = getTelegramWebApp();
    if (!webApp) return;
    try {
      if (disableVerticalSwipes) {
        webApp.disableVerticalSwipes?.();
      } else {
        webApp.enableVerticalSwipes?.();
      }
    } catch {
      // Ignore unsupported clients.
    }
    return () => {
      if (!disableVerticalSwipes) return;
      try {
        webApp.enableVerticalSwipes?.();
      } catch {
        // Ignore unsupported clients.
      }
    };
  }, [disableVerticalSwipes]);
}

/**
 * Enable confirmation before closing Mini App for stateful flows.
 */
export function useTelegramClosingConfirmation(enabled: boolean) {
  useEffect(() => {
    const webApp = getTelegramWebApp();
    if (!webApp) return;
    try {
      if (enabled) {
        webApp.enableClosingConfirmation?.();
      } else {
        webApp.disableClosingConfirmation?.();
      }
    } catch {
      // Ignore unsupported clients.
    }
    return () => {
      if (!enabled) return;
      try {
        webApp.disableClosingConfirmation?.();
      } catch {
        // Ignore unsupported clients.
      }
    };
  }, [enabled]);
}