'use client';

import { useEffect } from 'react';
import { ChevronLeft, ChevronRight, Download, X } from 'lucide-react';
import { Button } from '@/components/ui/button';
import type { ChatMessage } from '@/lib/api';
import { cn } from '@/lib/utils';

interface ChatImageLightboxProps {
  open: boolean;
  images: ChatMessage[];
  index: number;
  mediaUrls: Record<string, { blobUrl: string; fileName?: string } | undefined>;
  onClose: () => void;
  onIndexChange: (index: number) => void;
  onDownload?: (message: ChatMessage) => void;
}

export function ChatImageLightbox({
  open,
  images,
  index,
  mediaUrls,
  onClose,
  onIndexChange,
  onDownload
}: ChatImageLightboxProps) {
  const current = images[index];

  useEffect(() => {
    if (!open) return;
    function handleKeyDown(event: KeyboardEvent) {
      if (event.key === 'Escape') onClose();
      if (event.key === 'ArrowLeft') onIndexChange(Math.max(0, index - 1));
      if (event.key === 'ArrowRight') onIndexChange(Math.min(images.length - 1, index + 1));
    }
    window.addEventListener('keydown', handleKeyDown);
    return () => window.removeEventListener('keydown', handleKeyDown);
  }, [open, index, images.length, onClose, onIndexChange]);

  if (!open || !current?.storageKey) return null;

  const media = mediaUrls[current.storageKey];

  return (
    <div className="fixed inset-0 z-[250] flex flex-col bg-[#0f1117]/96">
      <div className="flex items-center justify-between px-4 py-3 text-white">
        <div className="min-w-0">
          <p className="truncate text-sm font-medium">{current.senderName}</p>
          <p className="text-xs text-white/60">
            {index + 1} из {images.length}
          </p>
        </div>
        <div className="flex items-center gap-1">
          {onDownload ? (
            <Button
              type="button"
              size="icon"
              variant="ghost"
              className="text-white hover:bg-white/10"
              aria-label="Скачать"
              onClick={() => onDownload(current)}
            >
              <Download className="h-5 w-5" />
            </Button>
          ) : null}
          <Button
            type="button"
            size="icon"
            variant="ghost"
            className="text-white hover:bg-white/10"
            aria-label="Закрыть"
            onClick={onClose}
          >
            <X className="h-5 w-5" />
          </Button>
        </div>
      </div>

      <div className="relative flex flex-1 items-center justify-center px-3 pb-4">
        <Button
          type="button"
          size="icon"
          variant="ghost"
          className={cn(
            'absolute left-3 z-10 h-11 w-11 rounded-full text-white hover:bg-white/10',
            index <= 0 && 'pointer-events-none opacity-30'
          )}
          aria-label="Предыдущее"
          onClick={() => onIndexChange(Math.max(0, index - 1))}
        >
          <ChevronLeft className="h-6 w-6" />
        </Button>

        <div className="flex max-h-full max-w-full items-center justify-center">
          {media?.blobUrl ? (
            // eslint-disable-next-line @next/next/no-img-element
            <img src={media.blobUrl} alt="" className="max-h-[calc(100vh-140px)] max-w-full object-contain" />
          ) : (
            <div className="text-sm text-white/70">Загрузка изображения...</div>
          )}
        </div>

        <Button
          type="button"
          size="icon"
          variant="ghost"
          className={cn(
            'absolute right-3 z-10 h-11 w-11 rounded-full text-white hover:bg-white/10',
            index >= images.length - 1 && 'pointer-events-none opacity-30'
          )}
          aria-label="Следующее"
          onClick={() => onIndexChange(Math.min(images.length - 1, index + 1))}
        >
          <ChevronRight className="h-6 w-6" />
        </Button>
      </div>

      {current.content ? (
        <div className="border-t border-white/10 px-4 py-3 text-sm text-white/85">{current.content}</div>
      ) : null}

      {images.length > 1 ? (
        <div className="flex gap-2 overflow-x-auto px-4 pb-4">
          {images.map((image, imageIndex) => {
            const thumb = image.storageKey ? mediaUrls[image.storageKey] : undefined;
            return (
              <button
                key={image.id}
                type="button"
                className={cn(
                  'h-14 w-14 shrink-0 overflow-hidden rounded-lg border-2',
                  imageIndex === index ? 'border-[#3390ec]' : 'border-transparent opacity-70'
                )}
                onClick={() => onIndexChange(imageIndex)}
              >
                {thumb?.blobUrl ? (
                  // eslint-disable-next-line @next/next/no-img-element
                  <img src={thumb.blobUrl} alt="" className="h-full w-full object-cover" />
                ) : null}
              </button>
            );
          })}
        </div>
      ) : null}
    </div>
  );
}
