'use client';

import { useCallback, useEffect, useState } from 'react';
import { useAuth } from '@/components/id/auth-provider';
import { apiFetch } from '@/lib/api';
import { AVATAR_UPDATED_EVENT } from '@/lib/avatar-events';
import { useResilientBlobUrl } from '@/hooks/use-resilient-blob-url';

interface AvatarAccessResponse {
  accessUrl: string;
  expiresAt: string;
}

export function useAvatarUrl(userId: string | undefined, hasAvatar: boolean | undefined, token: string | null) {
  const { isPinLocked, isLoading } = useAuth();
  const [accessUrl, setAccessUrl] = useState<string | null>(null);
  const [resolvingAccessUrl, setResolvingAccessUrl] = useState(false);

  const refreshAccessUrl = useCallback(async () => {
    if (!userId || !token || !hasAvatar || isPinLocked || isLoading) {
      setAccessUrl(null);
      setResolvingAccessUrl(false);
      return;
    }
    setResolvingAccessUrl(true);
    try {
      const response = await apiFetch<AvatarAccessResponse>(`/media/avatars/${userId}/url`, {}, token);
      setAccessUrl(response.accessUrl);
    } catch {
      setAccessUrl(null);
    } finally {
      setResolvingAccessUrl(false);
    }
  }, [hasAvatar, isLoading, isPinLocked, token, userId]);

  useEffect(() => {
    void refreshAccessUrl();
    if (!hasAvatar) return;
    const timer = window.setInterval(() => {
      void refreshAccessUrl();
    }, 14 * 60 * 1000);
    return () => window.clearInterval(timer);
  }, [hasAvatar, refreshAccessUrl]);

  useEffect(() => {
    if (!userId || !hasAvatar) return;
    function handleAvatarUpdated(event: Event) {
      const detail = (event as CustomEvent<{ userId?: string }>).detail;
      if (detail?.userId === userId) {
        void refreshAccessUrl();
      }
    }
    window.addEventListener(AVATAR_UPDATED_EVENT, handleAvatarUpdated);
    return () => window.removeEventListener(AVATAR_UPDATED_EVENT, handleAvatarUpdated);
  }, [hasAvatar, refreshAccessUrl, userId]);

  const {
    blobUrl,
    isLoading: isLoadingBlob,
    hasError
  } = useResilientBlobUrl(accessUrl, token, {
    enabled: Boolean(hasAvatar && accessUrl && !isPinLocked && !isLoading),
    label: `аватар ${userId ?? ''}`.trim()
  });

  const avatarUrl = blobUrl;
  const isAvatarLoading = Boolean(hasAvatar && (resolvingAccessUrl || isLoadingBlob || (accessUrl && !blobUrl && !hasError)));
  const refreshAvatarUrl = useCallback(async () => {
    await refreshAccessUrl();
  }, [refreshAccessUrl]);

  return { avatarUrl, isAvatarLoading, hasAvatarError: hasError, refreshAvatarUrl };
}