'use client';

import { isSupportAttachmentImage } from '@edr/types';
import { Download, ExternalLink, FileText } from 'lucide-react';
import { useCallback, useState } from 'react';

import Modal from '@/components/ui/Modal';

/** The minimal file shape the preview needs. */
export interface PreviewableFile {
  name: string;
  /**
   * A blob object URL, not the attachment's API path — the API guard reads the
   * bearer token from the `Authorization` header, which `<img>` and `<a>` can't
   * send. Callers fetch the bytes first (see `useAttachmentObjectUrl`).
   */
  url: string;
  mimeType: string;
}

/**
 * Drives a single shared preview modal for the page: call `view(file)` from any
 * attachment, render `viewer` once near the page root.
 *
 * Mirrors the shape of `useFileViewer` from `@edr/ui-common`, which the freight
 * backoffice uses. That hook can't be used here: it renders `@mantine/core`
 * components, and this app is Tailwind-only with no `MantineProvider` mounted —
 * its Modal would throw at runtime. Kept deliberately narrow (images inline,
 * everything else handed to the browser) rather than reimplementing the shared
 * viewer's pdf/office/video handling; swap this for the shared hook if this app
 * ever adopts Mantine.
 */
export function useFilePreview() {
  const [file, setFile] = useState<PreviewableFile | null>(null);

  const view = useCallback((f: PreviewableFile) => setFile(f), []);
  const close = useCallback(() => setFile(null), []);

  const viewer = (
    <Modal isOpen={file !== null} onClose={close} title={file?.name ?? ''} size="xl">
      {file && (
        <div className="flex flex-col items-center gap-4">
          {isSupportAttachmentImage(file.mimeType) ? (
            // eslint-disable-next-line @next/next/no-img-element
            <img
              src={file.url}
              alt={file.name}
              className="max-h-[70vh] w-auto max-w-full rounded-lg object-contain"
            />
          ) : (
            <div className="flex flex-col items-center gap-3 py-10 text-muted-foreground">
              <FileText size={48} />
              <p className="text-sm">No inline preview for this file type.</p>
            </div>
          )}
          <div className="flex gap-2">
            <a
              href={file.url}
              target="_blank"
              rel="noopener noreferrer"
              className="flex items-center gap-2 rounded-lg border border-border px-3 py-1.5 text-xs font-medium text-foreground transition hover:bg-muted"
            >
              <ExternalLink size={14} />
              Open in new tab
            </a>
            <a
              href={file.url}
              download={file.name}
              className="flex items-center gap-2 rounded-lg px-3 py-1.5 text-xs font-medium text-white transition hover:opacity-90"
              style={{ background: 'rgb(20 113 76)' }}
            >
              <Download size={14} />
              Download
            </a>
          </div>
        </div>
      )}
    </Modal>
  );

  return { view, close, viewer };
}