'use client';

import { useState, useEffect, useRef } from 'react';
import { Card, Portal, MediaItem, CardType } from '@/types';
import { EXTERNAL_LINK_ENABLED as EXTERNAL_LINK_DEFAULT, FACTORY_PRESET_SAVE_ENABLED, UPLOAD_LIMITS } from '@/lib/config';
import { CARD_LIMITS, PORTAL_LIMITS } from '@/lib/validation';
import { withBasePath } from '@/lib/url';

type CharCounterProps = { value: string | undefined; limit: number };
function CharCounter({ value, limit }: CharCounterProps) {
  const len = (value ?? '').length;
  const remaining = limit - len;
  const overflow = len > limit;
  const near = !overflow && len >= limit * 0.8;
  const color = overflow ? 'text-red-600 font-semibold' : near ? 'text-amber-600' : 'text-gray-400';
  return (
    <p className={`text-xs mt-1 text-right ${color}`}>
      {len} / {limit} · {remaining < 0 ? `${Math.abs(remaining)} over limit` : `${remaining} remaining`}
    </p>
  );
}

function stripTags(html: string): string {
  if (typeof window === 'undefined' || !html) return '';
  return new DOMParser().parseFromString(html, 'text/html').body.textContent ?? '';
}

type RichTextMiniProps = {
  value: string;
  onChange: (html: string) => void;
  limit: number;
  className?: string;
};
function RichTextMini({ value, onChange, limit, className }: RichTextMiniProps) {
  const ref = useRef<HTMLDivElement>(null);

  // Sync iniziale soltanto. Aggiornare innerHTML durante l'editing perderebbe la
  // posizione del cursore, quindi confidiamo che onInput tenga value e DOM allineati.
  useEffect(() => {
    if (ref.current && ref.current.innerHTML !== value) {
      ref.current.innerHTML = value || '';
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  const exec = (cmd: 'bold' | 'italic') => {
    ref.current?.focus();
    document.execCommand(cmd);
    onChange(ref.current?.innerHTML || '');
  };

  return (
    <div>
      <div className="flex gap-1 mb-1">
        <button
          type="button"
          onClick={() => exec('bold')}
          className="font-bold w-8 h-8 border border-gray-300 rounded hover:bg-gray-100"
          title="Bold"
        >B</button>
        <button
          type="button"
          onClick={() => exec('italic')}
          className="italic w-8 h-8 border border-gray-300 rounded hover:bg-gray-100"
          title="Italic"
        >I</button>
      </div>
      <div
        ref={ref}
        contentEditable
        suppressContentEditableWarning
        onInput={(e) => onChange((e.target as HTMLDivElement).innerHTML)}
        className={className ?? 'w-full border border-gray-300 rounded-lg p-2.5 min-h-[8rem] bg-white text-gray-900 focus:outline-none focus:ring-2 focus:ring-blue-500'}
      />
      <CharCounter value={stripTags(value)} limit={limit} />
    </div>
  );
}

function StyledSelect<T extends string>({
  value,
  onChange,
  options,
}: {
  value: T;
  onChange: (v: T) => void;
  options: { value: T; label: string; style?: React.CSSProperties }[];
}) {
  const [open, setOpen] = useState(false);
  const ref = useRef<HTMLDivElement>(null);

  useEffect(() => {
    if (!open) return;
    const onClick = (e: MouseEvent) => {
      if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false);
    };
    const onKey = (e: KeyboardEvent) => { if (e.key === 'Escape') setOpen(false); };
    document.addEventListener('mousedown', onClick);
    document.addEventListener('keydown', onKey);
    return () => {
      document.removeEventListener('mousedown', onClick);
      document.removeEventListener('keydown', onKey);
    };
  }, [open]);

  const current = options.find(o => o.value === value);
  // Fallback: se il value non matcha nessuna opzione (es. tipo disattivato dalla flag), mostra il valore raw prettificato
  const displayLabel = current?.label
    ?? (typeof value === 'string' && value.length > 0
        ? value.replace(/_/g, ' ').toLowerCase().replace(/\b\w/g, c => c.toUpperCase())
        : '');
  const inputBase = "w-full border border-gray-300 p-2.5 rounded-lg outline-none focus:ring-2 focus:ring-blue-500 bg-white text-gray-900";

  return (
    <div ref={ref} className="relative">
      <button
        type="button"
        onClick={() => setOpen(o => !o)}
        className={`${inputBase} text-left flex items-center justify-between cursor-pointer`}
      >
        <span className={displayLabel ? '' : 'text-gray-400'} style={current?.style}>{displayLabel || 'Select…'}</span>
        <span className={`text-gray-500 transition-transform ${open ? 'rotate-180' : ''}`}>▾</span>
      </button>
      {open && (
        <div className="absolute left-0 right-0 top-full mt-1 bg-white border border-gray-200 rounded-lg shadow-lg z-30 overflow-hidden">
          {options.map(o => (
            <button
              key={o.value}
              type="button"
              onClick={() => { onChange(o.value); setOpen(false); }}
              className={`w-full text-left px-3 py-2.5 hover:bg-blue-50 transition-colors ${o.value === value ? 'bg-blue-100 font-semibold text-blue-700' : 'text-gray-800'}`}
              style={o.style}
            >
              {o.label}
            </button>
          ))}
        </div>
      )}
    </div>
  );
}

const VIDEO_EXTENSIONS = 'mp4|m4v|webm|mov|qt|mkv|avi|divx|wmv|asf|flv|f4v|3gp|3gpp|3g2|mts|m2ts|ts|mpg|mpeg|vob|mxf|ogv|ogg';
// Sottoinsieme di formati video davvero riproducibili dai browser moderni
const PLAYBACK_SUPPORTED_VIDEO = 'mp4|m4v|webm|mov|qt|ogv|ogg';
const PLAYBACK_SUPPORTED_LABEL = 'MP4, M4V, WebM, MOV, OGV';

const isVideoUrl = (url: string) => new RegExp(`\\.(${VIDEO_EXTENSIONS})(\\?|$)`, 'i').test(url);
const isPdfFile = (file: File) =>
  file.type === 'application/pdf' || /\.pdf$/i.test(file.name);
const isVideoFile = (file: File) =>
  file.type.startsWith('video/') || new RegExp(`\\.(${VIDEO_EXTENSIONS})$`, 'i').test(file.name);
const isPlayableVideoFile = (file: File) =>
  new RegExp(`\\.(${PLAYBACK_SUPPORTED_VIDEO})$`, 'i').test(file.name);

const previewFontFamily = (filename: string): string =>
  `PortalPreview-${filename.replace(/[^A-Za-z0-9]/g, '_')}`;

const fontFormatFromName = (filename: string): string => {
  const ext = filename.match(/\.([^.]+)$/)?.[1].toLowerCase() ?? 'woff2';
  return ({ woff2: 'woff2', woff: 'woff', ttf: 'truetype', otf: 'opentype' } as Record<string, string>)[ext] ?? 'woff2';
};

const extractFileName = (url: string): string => {
  const match = url.match(/[?&]name=([^&]+)/);
  if (match) return decodeURIComponent(match[1]);
  const seg = url.split('/').pop() || 'download';
  return seg.split('?')[0];
};

async function uploadBlobAsImage(blob: Blob, name: string): Promise<string | null> {
  const formData = new FormData();
  formData.append('file', new File([blob], name, { type: blob.type || 'image/png' }));
  const res = await fetch(withBasePath('/api/upload'), { method: 'POST', body: formData });
  const data = await res.json();
  return data.url || null;
}

async function extractVideoFrame(file: File): Promise<Blob | null> {
  const url = URL.createObjectURL(file);
  try {
    const video = document.createElement('video');
    video.muted = true;
    video.playsInline = true;
    video.preload = 'metadata';
    video.src = url;

    await new Promise<void>((resolve, reject) => {
      video.addEventListener('loadedmetadata', () => resolve(), { once: true });
      video.addEventListener('error', () => reject(new Error('video load error')), { once: true });
    });

    // Seek slightly past 0 — at exactly 0 some codecs return a black frame
    video.currentTime = Math.min(0.1, Math.max(0, video.duration / 10));
    await new Promise<void>((resolve, reject) => {
      video.addEventListener('seeked', () => resolve(), { once: true });
      video.addEventListener('error', () => reject(new Error('video seek error')), { once: true });
    });

    const canvas = document.createElement('canvas');
    canvas.width = video.videoWidth;
    canvas.height = video.videoHeight;
    const ctx = canvas.getContext('2d');
    if (!ctx) return null;
    ctx.drawImage(video, 0, 0);

    return await new Promise<Blob | null>((resolve) =>
      canvas.toBlob((b) => resolve(b), 'image/jpeg', 0.85)
    );
  } finally {
    URL.revokeObjectURL(url);
  }
}

async function pdfToImageItems(
  file: File,
  onProgress: (page: number, total: number) => void
): Promise<MediaItem[]> {
  const pdfjs = await import('pdfjs-dist');
  // Worker file is copied to /public via the postinstall script
  pdfjs.GlobalWorkerOptions.workerSrc = '/pdf.worker.min.mjs';

  const arrayBuffer = await file.arrayBuffer();
  const pdf = await pdfjs.getDocument({ data: arrayBuffer }).promise;
  const baseName = file.name.replace(/\.pdf$/i, '').replace(/[^a-zA-Z0-9-_]/g, '_');
  const items: MediaItem[] = [];

  for (let i = 1; i <= pdf.numPages; i++) {
    onProgress(i, pdf.numPages);
    const page = await pdf.getPage(i);
    const viewport = page.getViewport({ scale: 1.5 });
    const canvas = document.createElement('canvas');
    canvas.width = viewport.width;
    canvas.height = viewport.height;
    const ctx = canvas.getContext('2d');
    if (!ctx) continue;
    await page.render({ canvasContext: ctx, viewport }).promise;

    const blob: Blob = await new Promise((resolve, reject) => {
      canvas.toBlob(b => b ? resolve(b) : reject(new Error('toBlob failed')), 'image/png');
    });

    const url = await uploadBlobAsImage(blob, `${baseName}-page${i}.png`);
    if (url) items.push({ url });
  }

  return items;
}

export default function AdminDashboard() {
  const [activeTab, setActiveTab] = useState<'cards' | 'settings'>('cards');

  // Card State
  const [cards, setCards] = useState<Card[]>([]);
  const [isEditing, setIsEditing] = useState<Partial<Card> | null>(null);

  // Portal State
  const [portal, setPortal] = useState<Partial<Portal>>({});
  const [savingPortal, setSavingPortal] = useState(false);
  const [uploading, setUploading] = useState<{ [key: string]: boolean }>({});

  // Hex input per il theme color: stato locale che resta libero durante la digitazione,
  // committa su portal.themeColor solo quando la stringa e' un hex completo valido.
  const [hexInput, setHexInput] = useState<string>('#1e3a8a');
  useEffect(() => {
    if (portal.themeColor) setHexInput(portal.themeColor);
  }, [portal.themeColor]);

  // NEW UI STATES: Toast and Confirm Dialog
  const [toast, setToast] = useState<{ message: string; type: 'success' | 'error' } | null>(null);
  const [confirmDialog, setConfirmDialog] = useState<{ message: string, onConfirm: () => void } | null>(null);
  const [pdfProgress, setPdfProgress] = useState<{ name: string; page: number; total: number } | null>(null);
  const [availableFonts, setAvailableFonts] = useState<string[]>([]);
  // Map: expected URL of the future-transcoded file → job state.
  // We key by URL (not jobId) so the rendering layer can look it up cheaply.
  const [transcodeJobs, setTranscodeJobs] = useState<Record<string, { jobId: string; status: string; progress: number }>>({});

  // External Link feature flag: priorità al setting del portale, fallback alla costante in lib/config.
  const externalLinksOn = portal.externalLinkEnabled ?? EXTERNAL_LINK_DEFAULT;

  // Helper to show auto-dismissing toast
  const showToast = (message: string, type: 'success' | 'error' = 'success') => {
    setToast({ message, type });
    setTimeout(() => setToast(null), type === 'error' ? 6000 : 3000);
  };

  const refreshFonts = async () => {
    try {
      const res = await fetch(withBasePath('/api/fonts'));
      if (res.ok) setAvailableFonts(await res.json());
    } catch { setAvailableFonts([]); }
  };

  useEffect(() => {
    fetch(withBasePath('/api/cards')).then(res => res.json()).then(setCards);
    fetch(withBasePath('/api/portals')).then(res => res.json()).then(data => data && setPortal(data));
    void refreshFonts();
  }, []);

  const [uploadingFont, setUploadingFont] = useState(false);
  const handleFontUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    e.target.value = '';
    if (!file) return;
    setUploadingFont(true);
    try {
      const fd = new FormData();
      fd.append('file', file);
      const res = await fetch(withBasePath('/api/admin/fonts'), { method: 'POST', body: fd });
      const data = await res.json().catch(() => ({}));
      if (!res.ok) {
        showToast(data?.error || `Upload error (${res.status})`, 'error');
        return;
      }
      showToast(`Font uploaded: ${data.name}`);
      await refreshFonts();
      // Auto-seleziona il font appena caricato
      if (data.name) setPortal(p => ({ ...p, fontFamily: data.name }));
    } catch (err) {
      showToast(`Could not reach the server. Check your network connection and try again. Details: ${(err as Error).message}`, 'error');
    } finally {
      setUploadingFont(false);
    }
  };

  const handleFontDelete = async (name: string) => {
    if (!window.confirm(`Delete font "${name}"? Portals using this font will fall back to the system font.`)) return;
    try {
      const res = await fetch(withBasePath(`/api/admin/fonts?name=${encodeURIComponent(name)}`), { method: 'DELETE' });
      const data = await res.json().catch(() => ({}));
      if (!res.ok) {
        showToast(data?.error || `Delete error (${res.status})`, 'error');
        return;
      }
      showToast('Font deleted.');
      await refreshFonts();
      if (portal.fontFamily === name) setPortal(p => ({ ...p, fontFamily: '' }));
    } catch (err) {
      showToast(`Could not reach the server. Check your network connection and try again. Details: ${(err as Error).message}`, 'error');
    }
  };

  // Poll pending transcode jobs every 2s. On 'done' we drop the entry from the
  // map; on 'failed' we additionally pull the media URL out of the editor so the
  // admin doesn't try to save a broken reference.
  useEffect(() => {
    const pendingEntries = Object.entries(transcodeJobs).filter(
      ([, j]) => j.status === 'queued' || j.status === 'running'
    );
    if (pendingEntries.length === 0) return;

    let cancelled = false;
    const tick = async () => {
      for (const [url, j] of pendingEntries) {
        if (cancelled) return;
        try {
          const res = await fetch(withBasePath(`/api/transcode/${j.jobId}`));
          if (!res.ok) continue;
          const data = await res.json();
          if (cancelled) return;

          if (data.status === 'done') {
            setTranscodeJobs(prev => {
              const next = { ...prev };
              delete next[url];
              return next;
            });
          } else if (data.status === 'failed' || data.status === 'cancelled') {
            setTranscodeJobs(prev => {
              const next = { ...prev };
              delete next[url];
              return next;
            });
            setIsEditing(prev => prev ? {
              ...prev,
              extraMedia: (prev.extraMedia || []).filter(m => m.url !== url),
              imageUrl: prev.imageUrl === url ? '' : prev.imageUrl,
            } : prev);
            const msg = data.status === 'failed'
              ? `Transcoding failed${data.error ? `: ${String(data.error).split('\n')[0]}` : ''}`
              : 'Trascodifica annullata';
            showToast(msg, 'error');
          } else {
            setTranscodeJobs(prev => prev[url] ? ({ ...prev, [url]: { ...prev[url], status: data.status, progress: data.progress ?? 0 } }) : prev);
          }
        } catch {
          // ignore network glitches; will retry next tick
        }
      }
    };

    void tick();
    const id = window.setInterval(() => { void tick(); }, 2000);
    return () => { cancelled = true; window.clearInterval(id); };
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [Object.keys(transcodeJobs).join('|')]);

  const handleUpload = async (e: React.ChangeEvent<HTMLInputElement>, field: string, isPortal = false) => {
    if (!e.target.files?.[0]) return;
    setUploading(prev => ({ ...prev, [field]: true }));

    const formData = new FormData();
    formData.append('file', e.target.files[0]);
    // Il logo è l'unico upload che ammette SVG (sanitizzato lato server).
    const endpoint = field === 'logoUrl' ? '/api/upload?context=logo' : '/api/upload';
    const res = await fetch(withBasePath(endpoint), { method: 'POST', body: formData });
    const data = await res.json();

    if (data.url) {
      if (isPortal) {
        setPortal(prev => ({ ...prev, [field]: data.url }));
      } else {
        setIsEditing(prev => ({ ...prev, [field]: data.url }));
      }
    }
    setUploading(prev => ({ ...prev, [field]: false }));
  };

  const handleUploadExtraMedia = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const files = e.target.files;
    if (!files || files.length === 0) return;
    setUploading(prev => ({ ...prev, extraMedia: true }));

    const startedWithoutCover = !isEditing?.imageUrl;
    let pendingCover: string | null = null;
    const canPromote = () => startedWithoutCover && !pendingCover;

    // Pre-filtro: scarta video con formati non riproducibili nei browser
    const rejected: string[] = [];
    const acceptedFiles: File[] = [];
    for (const file of Array.from(files)) {
      if (isVideoFile(file) && !isPlayableVideoFile(file)) {
        rejected.push(file.name);
      } else {
        acceptedFiles.push(file);
      }
    }
    if (rejected.length > 0) {
      const list = rejected.length <= 3
        ? rejected.join(', ')
        : `${rejected.slice(0, 3).join(', ')} and ${rejected.length - 3} more`;
      showToast(
        `Unsupported format! Supported formats: ${PLAYBACK_SUPPORTED_LABEL}. Skipped files: ${list}`,
        'error'
      );
    }
    if (acceptedFiles.length === 0) {
      setUploading(prev => ({ ...prev, extraMedia: false }));
      e.target.value = '';
      return;
    }

    const uploaded: MediaItem[] = [];
    for (const file of acceptedFiles) {
      try {
        if (isPdfFile(file)) {
          const items = await pdfToImageItems(file, (page, total) =>
            setPdfProgress({ name: file.name, page, total })
          );
          setPdfProgress(null);
          if (items.length > 0 && canPromote()) {
            // Promote the first PDF page to cover; skip it from the gallery to avoid duplication.
            pendingCover = items[0].url;
            uploaded.push(...items.slice(1));
          } else {
            uploaded.push(...items);
          }
        } else {
          const formData = new FormData();
          formData.append('file', file);
          const res = await fetch(withBasePath('/api/upload'), { method: 'POST', body: formData });
          const data = await res.json();
          if (!data.url) continue;

          if (data?.transcoding?.jobId) {
            const { jobId, status } = data.transcoding;
            setTranscodeJobs(prev => ({ ...prev, [data.url]: { jobId, status, progress: 0 } }));
          }

          if (isVideoFile(file)) {
            // Video always goes to the gallery so users can play it.
            uploaded.push({ url: data.url });
            // If no cover yet, extract the first frame and use it as the cover.
            if (canPromote()) {
              try {
                const blob = await extractVideoFrame(file);
                if (blob) {
                  const baseName = file.name.replace(/\.[^.]+$/, '').replace(/[^a-zA-Z0-9-_]/g, '_');
                  const posterUrl = await uploadBlobAsImage(blob, `${baseName}-poster.jpg`);
                  if (posterUrl) pendingCover = posterUrl;
                }
              } catch (err) {
                console.warn('Could not extract video poster for', file.name, err);
              }
            }
          } else {
            // Plain image
            if (canPromote()) {
              // Promote to cover; skip the gallery to avoid duplication.
              pendingCover = data.url;
            } else {
              uploaded.push({ url: data.url });
            }
          }
        }
      } catch (err) {
        console.error('Upload failed for', file.name, err);
        showToast(`Failed to process "${file.name}".`);
        setPdfProgress(null);
      }
    }

    setIsEditing(prev => ({
      ...prev,
      imageUrl: (startedWithoutCover && pendingCover) ? pendingCover : (prev?.imageUrl || ''),
      extraMedia: [...(prev?.extraMedia || []), ...uploaded],
    }));
    setUploading(prev => ({ ...prev, extraMedia: false }));
    e.target.value = '';
  };

  const removeExtraMedia = (index: number) => {
    setIsEditing(prev => ({
      ...prev,
      extraMedia: (prev?.extraMedia || []).filter((_, i) => i !== index),
    }));
  };

  const moveExtraMedia = (index: number, direction: 'up' | 'down') => {
    setIsEditing(prev => {
      const items = [...(prev?.extraMedia || [])];
      if (direction === 'up' && index > 0) {
        [items[index - 1], items[index]] = [items[index], items[index - 1]];
      } else if (direction === 'down' && index < items.length - 1) {
        [items[index + 1], items[index]] = [items[index], items[index + 1]];
      } else {
        return prev;
      }
      return { ...prev, extraMedia: items };
    });
  };

  const toggleAutoplay = (index: number) => {
    setIsEditing(prev => ({
      ...prev,
      extraMedia: (prev?.extraMedia || []).map((m, i) =>
        i === index ? { ...m, autoplay: !m.autoplay } : m
      ),
    }));
  };

  const toggleMuted = (index: number) => {
    setIsEditing(prev => ({
      ...prev,
      extraMedia: (prev?.extraMedia || []).map((m, i) =>
        i === index ? { ...m, muted: !m.muted } : m
      ),
    }));
  };

  const handleSaveCard = async () => {
    if (!isEditing) return;

    // External Link: URL obbligatorio (feedback immediato, ribadito anche lato server)
    if (isEditing.cardType === 'EXTERNAL_LINK' && !isEditing.actionUrl?.trim()) {
      showToast('URL is required for External Link cards', 'error');
      return;
    }

    const generateSafeId = () => 'card-' + Date.now().toString(36) + Math.random().toString(36).substring(2);
    const newCard = { ...isEditing, id: isEditing.id || generateSafeId() } as Card;

    const res = await fetch(withBasePath('/api/cards'), {
      method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(newCard)
    });

    if (!res.ok) {
      let message = 'Save error';
      try {
        const body = await res.json();
        if (res.status === 400 && Array.isArray(body?.errors) && body.errors.length > 0) {
          const first = body.errors[0];
          message = first.limit != null
            ? `${first.field}: ${first.message} (${first.actual} / ${first.limit})`
            : `${first.field}: ${first.message}`;
        } else if (body?.error) {
          message = body.error;
        }
      } catch {}
      showToast(message, 'error');
      return; // keep the editor open so the admin can fix
    }

    setCards(prev => {
      const exists = prev.find(c => c.id === newCard.id);
      return exists ? prev.map(c => c.id === newCard.id ? newCard : c) : [...prev, newCard];
    });
    setIsEditing(null);
  };

  const handleDeleteCard = (id: string) => {
    // Replace window.confirm with our custom dialog
    setConfirmDialog({
      message: 'Are you sure you want to delete this card? This action cannot be undone.',
      onConfirm: async () => {
        await fetch(withBasePath(`/api/cards?id=${id}`), { method: 'DELETE' });
        setCards(prev => prev.filter(c => c.id !== id));
        setConfirmDialog(null);
        showToast('Card successfully deleted.');
      }
    });
  };

  const moveCard = async (index: number, direction: 'up' | 'down') => {
    const newCards = [...cards];
    
    if (direction === 'up' && index > 0) {
      [newCards[index - 1], newCards[index]] = [newCards[index], newCards[index - 1]];
    } else if (direction === 'down' && index < newCards.length - 1) {
      [newCards[index + 1], newCards[index]] = [newCards[index], newCards[index + 1]];
    } else {
      return; // Do nothing if trying to move out of bounds
    }
    
    // Recalculate displayOrder for the whole array
    const updatedCards = newCards.map((c, i) => ({ ...c, displayOrder: i }));
    
    // Optimistically update the UI
    setCards(updatedCards);
    
    // Persist the new order to the backend
    await fetch(withBasePath('/api/cards'), {
      method: 'PUT',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(updatedCards)
    });
  };

  const handleSavePortal = async () => {
    setSavingPortal(true);
    await fetch(withBasePath('/api/portals'), {
      method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(portal)
    });
    setSavingPortal(false);
    showToast('Portal settings saved successfully!'); // Replaced window.alert
  };

  const handleBackupDownload = () => {
    window.location.href = withBasePath('/api/admin/backup');
  };

  const [restoring, setRestoring] = useState(false);
  const handleRestoreUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    e.target.value = '';
    if (!file) return;
    if (!window.confirm('Restore will overwrite all current data (cards, portal, media, fonts). Continue?')) return;

    setRestoring(true);
    try {
      const fd = new FormData();
      fd.append('file', file);
      const res = await fetch(withBasePath('/api/admin/restore'), { method: 'POST', body: fd });
      const data = await res.json().catch(() => ({}));
      if (!res.ok) {
        showToast(data?.error || `Restore error (${res.status})`, 'error');
        return;
      }
      showToast(`Restore completed: ${data.restored?.cards ?? 0} cards, ${data.restored?.portals ?? 0} portals. Reloading…`);
      setTimeout(() => window.location.reload(), 1200);
    } catch (err) {
      showToast(`Could not reach the server. Check your network connection and try again. Details: ${(err as Error).message}`, 'error');
    } finally {
      setRestoring(false);
    }
  };

  // Factory preset: la sezione è sempre visibile (per chi accede a /admin); solo
  // il bottone "Salva come preset" è gated da FACTORY_PRESET_SAVE_ENABLED.
  const [factoryPreset, setFactoryPreset] = useState<{ exists: boolean; sizeBytes?: number; modifiedAt?: string } | null>(null);
  const [savingPreset, setSavingPreset] = useState(false);
  const [factoryResetting, setFactoryResetting] = useState(false);

  const refreshFactoryPreset = async () => {
    try {
      const res = await fetch(withBasePath('/api/admin/factory-preset'));
      if (res.ok) setFactoryPreset(await res.json());
    } catch { /* ignore */ }
  };
  useEffect(() => {
    void refreshFactoryPreset();
  }, []);

  const handleSaveFactoryPreset = async () => {
    const msg = factoryPreset?.exists
      ? 'Overwrite the existing factory preset with the current state?'
      : 'Save the current state as factory preset?';
    if (!window.confirm(msg)) return;
    setSavingPreset(true);
    try {
      const res = await fetch(withBasePath('/api/admin/factory-preset'), { method: 'POST' });
      const data = await res.json().catch(() => ({}));
      if (!res.ok) {
        showToast(data?.error || `Error (${res.status})`, 'error');
        return;
      }
      showToast('Factory preset updated.');
      await refreshFactoryPreset();
    } catch (err) {
      showToast(`Could not reach the server. Check your network connection and try again. Details: ${(err as Error).message}`, 'error');
    } finally {
      setSavingPreset(false);
    }
  };

  const handleFactoryReset = async () => {
    if (!window.confirm('FACTORY RESET — all current data will be replaced with the factory preset. Continue?')) return;
    setFactoryResetting(true);
    try {
      const res = await fetch(withBasePath('/api/admin/factory-reset'), { method: 'POST' });
      const data = await res.json().catch(() => ({}));
      if (!res.ok) {
        showToast(data?.error || `Error (${res.status})`, 'error');
        return;
      }
      showToast(`Factory reset completed: ${data.restored?.cards ?? 0} cards, ${data.restored?.portals ?? 0} portals. Reloading…`);
      setTimeout(() => window.location.reload(), 1200);
    } catch (err) {
      showToast(`Could not reach the server. Check your network connection and try again. Details: ${(err as Error).message}`, 'error');
    } finally {
      setFactoryResetting(false);
    }
  };

  // Shared Input Classes for high contrast
  const inputClasses = "w-full border border-gray-300 p-2.5 rounded-lg outline-none focus:ring-2 focus:ring-blue-500 bg-white text-gray-900 placeholder-gray-400";

  return (
    <div className="min-h-screen bg-gray-50 font-sans pb-12">
      {/* Top Header */}
      <div className="bg-blue-900 text-white shadow-md py-6 px-4">
        <div className="max-w-5xl mx-auto flex justify-between items-center">
          <div>
            <h1 className="text-2xl font-bold">Captive Portal CMS</h1>
            <p className="text-sm text-blue-200">Local Administration</p>
          </div>
          <a href={withBasePath('/')} target="_blank" className="bg-blue-800 hover:bg-blue-700 text-white px-4 py-2 rounded text-sm transition-colors">
            View Live Portal ↗
          </a>
        </div>
      </div>

      <div className="max-w-5xl mx-auto mt-8 px-4">
        {/* Tab Navigation */}
        <div className="flex space-x-2 mb-6">
          <button onClick={() => setActiveTab('cards')} className={`px-6 py-3 rounded-t-lg font-bold transition-colors ${activeTab === 'cards' ? 'bg-white text-blue-700 border-t-4 border-blue-600 shadow-sm' : 'bg-gray-200 text-gray-600 hover:bg-gray-300'}`}>
            Manage Cards
          </button>
          <button onClick={() => setActiveTab('settings')} className={`px-6 py-3 rounded-t-lg font-bold transition-colors ${activeTab === 'settings' ? 'bg-white text-blue-700 border-t-4 border-blue-600 shadow-sm' : 'bg-gray-200 text-gray-600 hover:bg-gray-300'}`}>
            Portal Settings
          </button>
        </div>

        <div className="bg-white rounded-b-xl rounded-tr-xl shadow-sm border border-gray-200 overflow-hidden min-h-[500px]">
          
          {/* TAB: CARDS */}
          {activeTab === 'cards' && (
            <div className="p-6 md:p-8">
              <div className="flex justify-between items-center mb-8 border-b pb-4">
                <h2 className="text-xl font-bold text-gray-800">Card Grid</h2>
                <button onClick={() => setIsEditing({ title: '', cardType: 'INFO_PAGE', displayOrder: cards.length })} className="bg-blue-600 text-white px-5 py-2.5 rounded-lg shadow-sm hover:bg-blue-700 font-medium">
                  + Add New Card
                </button>
              </div>

              <div className="space-y-3 mb-8">
                {cards.length === 0 && <p className="text-gray-500 italic text-center py-8">No cards available. Create one to get started.</p>}
                {cards.map((card, idx) => (
                  // CHANGED: flex-col on mobile, flex-row on sm+, added gap-4 for mobile spacing
                  <div key={card.id} className="flex flex-col sm:flex-row sm:items-center justify-between p-4 border rounded-lg bg-gray-50 hover:bg-gray-100 transition-colors gap-4">
                    <div className="flex items-center gap-4">
                      {(() => {
                        const previewUrl = card.imageUrl || card.extraMedia?.[0]?.url || '';
                        if (!previewUrl) {
                          return <div className="w-16 h-16 bg-gray-200 rounded-md shadow-sm flex items-center justify-center text-gray-400 text-xs shrink-0">No Image</div>;
                        }
                        return isVideoUrl(previewUrl)
                          ? <video src={withBasePath(previewUrl)} className="w-16 h-16 object-cover rounded-md shadow-sm shrink-0" muted playsInline preload="metadata" />
                          : <img src={withBasePath(previewUrl)} className="w-16 h-16 object-cover rounded-md shadow-sm shrink-0" alt="" />;
                      })()}
                      <div>
                        <span className="font-semibold text-gray-800 block">{card.title}</span>
                        <span className="text-xs text-gray-500 uppercase tracking-wider">
                          {card.cardType}
                          {card.extraMedia && card.extraMedia.length > 0 && (
                            <span className="text-gray-400 normal-case tracking-normal ml-2">[{card.extraMedia.length}]</span>
                          )}
                          {card.cardType === 'FULLSCREEN_LOCK' && (
                            <span className="ml-2 bg-red-100 text-red-700 px-2 py-0.5 rounded font-bold text-[10px] tracking-wider">LOCK ACTIVE</span>
                          )}
                        </span>
                      </div>
                    </div>
                    
                    {/* CHANGED: flex-wrap to ensure buttons don't overflow on small screens, w-full on mobile */}
                    <div className="flex flex-wrap items-center gap-2 w-full sm:w-auto justify-end">
                      <button onClick={() => moveCard(idx, 'up')} className="p-2 text-gray-500 hover:text-gray-800 hover:bg-gray-200 rounded" title="Move Up">↑</button>
                      <button onClick={() => moveCard(idx, 'down')} className="p-2 text-gray-500 hover:text-gray-800 hover:bg-gray-200 rounded" title="Move Down">↓</button>
                      <div className="w-px h-6 bg-gray-300 mx-1 hidden sm:block"></div>
                      <button onClick={() => setIsEditing(card)} className="px-4 py-2 text-blue-600 hover:bg-blue-50 rounded font-medium">Edit</button>
                      <button onClick={() => handleDeleteCard(card.id)} className="px-4 py-2 text-red-600 hover:bg-red-50 rounded font-medium">Delete</button>
                    </div>
                  </div>
                ))}
              </div>
            </div>
          )}

          {/* TAB: SETTINGS */}
          {activeTab === 'settings' && (
            <div className="p-6 md:p-8">
              <h2 className="text-xl font-bold text-gray-800 mb-8 border-b pb-4">Global Portal Settings</h2>
              
              <div className="grid grid-cols-1 md:grid-cols-2 gap-10">
                <div className="space-y-6">
                  <div>
                    <label className="block text-sm font-semibold text-gray-700 mb-1">Portal Title</label>
                    <input type="text" maxLength={PORTAL_LIMITS.title} value={portal.title || ''} onChange={e => setPortal({...portal, title: e.target.value})} className={inputClasses} />
                    <CharCounter value={portal.title} limit={PORTAL_LIMITS.title} />
                  </div>

                  <div>
                    <label className="block text-sm font-semibold text-gray-700 mb-1">Welcome Text</label>
                    <RichTextMini
                      value={portal.welcomeText || ''}
                      onChange={html => setPortal({ ...portal, welcomeText: html })}
                      limit={PORTAL_LIMITS.welcomeText}
                    />
                  </div>

                  <div className="flex gap-8">
                    <div>
                      <label className="block text-sm font-semibold text-gray-700 mb-1">Theme Color</label>
                      <div className="flex items-center gap-4">
                        <input type="color" value={portal.themeColor || '#1e3a8a'} onChange={e => setPortal({...portal, themeColor: e.target.value})} className="h-12 w-12 rounded cursor-pointer border-0 p-0" />
                        <input
                          type="text"
                          value={hexInput}
                          onChange={e => {
                            const v = e.target.value;
                            setHexInput(v);
                            // Commit a portal.themeColor solo se la stringa e' un hex pieno e valido.
                            if (/^#[0-9a-fA-F]{6}$/.test(v)) setPortal({ ...portal, themeColor: v.toLowerCase() });
                          }}
                          onBlur={() => {
                            // Se l'utente esce dal campo con un valore non valido, ripristina l'ultimo valore noto.
                            if (!/^#[0-9a-fA-F]{6}$/.test(hexInput)) setHexInput(portal.themeColor || '#1e3a8a');
                          }}
                          maxLength={7}
                          spellCheck={false}
                          placeholder="#RRGGBB"
                          aria-label="Theme color hex"
                          className={`font-mono text-sm px-3 py-2 rounded border outline-none focus:ring-2 focus:ring-blue-500 w-32 ${/^#[0-9a-fA-F]{6}$/.test(hexInput) ? 'border-gray-300 text-gray-900' : 'border-red-500 text-red-600'}`}
                        />
                      </div>
                    </div>
                    
                    {/* NEW: Max Columns Setting updated for 3 */}
                    <div className="flex-1">
                      <label className="block text-sm font-semibold text-gray-700 mb-1">Grid Max Columns: {portal.maxGridColumns || 5}</label>
                      <input 
                        type="range" 
                        min="3" 
                        max="8" 
                        value={portal.maxGridColumns || 5} 
                        onChange={e => setPortal({...portal, maxGridColumns: parseInt(e.target.value)})}
                        className="w-full mt-3 accent-blue-600"
                      />
                      <div className="flex justify-between text-xs text-gray-400 mt-1">
                        <span>3</span><span>4</span><span>5</span><span>6</span><span>7</span><span>8</span>
                      </div>
                    </div>
                  </div>

                  <div>
                    <label className="block text-sm font-semibold text-gray-700 mb-1">Portal font</label>
                    <style dangerouslySetInnerHTML={{ __html: availableFonts.map(f => `
@font-face {
  font-family: '${previewFontFamily(f)}';
  src: url('${withBasePath('/api/fonts?name=' + encodeURIComponent(f))}') format('${fontFormatFromName(f)}');
  font-display: swap;
}`).join('') }} />
                    <StyledSelect<string>
                      value={portal.fontFamily ?? ''}
                      onChange={(v) => setPortal({ ...portal, fontFamily: v })}
                      options={[
                        { value: '', label: 'System (Arial)' },
                        ...availableFonts.map(f => ({
                          value: f,
                          label: f.replace(/\.(woff2?|ttf|otf)$/i, ''),
                          style: { fontFamily: `'${previewFontFamily(f)}', Arial, Helvetica, sans-serif` },
                        })),
                      ]}
                    />
                    <div className="flex items-center gap-3 flex-wrap mt-2">
                      <label className="cursor-pointer bg-gray-100 hover:bg-gray-200 text-gray-800 font-semibold text-sm px-4 py-2 rounded-full transition-colors">
                        <input
                          type="file"
                          accept=".woff2,.woff,.ttf,.otf,font/woff2,font/woff,font/ttf,font/otf"
                          onChange={handleFontUpload}
                          disabled={uploadingFont}
                          hidden
                        />
                        {uploadingFont ? 'Uploading…' : 'Upload font…'}
                      </label>
                      {portal.fontFamily && availableFonts.includes(portal.fontFamily) && (
                        <button
                          type="button"
                          onClick={() => handleFontDelete(portal.fontFamily!)}
                          className="text-xs text-red-600 hover:text-red-700 underline"
                          title={`Delete font "${portal.fontFamily}"`}
                        >
                          Delete selected font
                        </button>
                      )}
                    </div>
                    <p className="text-xs text-gray-500 mt-1">Supported: <code>.woff2</code>, <code>.woff</code>, <code>.ttf</code>, <code>.otf</code> · max {(UPLOAD_LIMITS.font / (1024 * 1024)).toFixed(0)} MB</p>
                  </div>
                </div>

                <div className="space-y-6">
                  {/* Logo Upload with Remove Button */}
                  <div>
                    <label className="block text-sm font-semibold text-gray-700 mb-1">Logo Image</label>
                    <div className="flex items-center gap-3 flex-wrap">
                      <label className="cursor-pointer bg-gray-100 hover:bg-gray-200 text-gray-800 font-semibold text-sm px-4 py-2 rounded-full transition-colors">
                        <input type="file" accept="image/*,.svg,image/svg+xml" onChange={e => handleUpload(e, 'logoUrl', true)} hidden />
                        Choose image…
                      </label>
                      {uploading['logoUrl'] && <span className="text-xs text-blue-500">Uploading...</span>}
                    </div>
                    {portal.logoUrl && (
                      <div className="mt-2 bg-gray-100 p-4 rounded inline-block relative border">
                        <img src={withBasePath(portal.logoUrl)} className="h-16 object-contain" alt="Logo Preview" />
                        <a href={withBasePath(portal.logoUrl)} download={extractFileName(portal.logoUrl)} className="absolute -top-2 right-6 bg-gray-700 hover:bg-gray-800 text-white w-6 h-6 rounded-full text-xs font-bold shadow flex items-center justify-center" title="Download" aria-label="Download logo">⬇</a>
                        <button onClick={() => setPortal({...portal, logoUrl: ''})} className="absolute -top-2 -right-2 bg-red-500 text-white w-6 h-6 rounded-full text-xs font-bold hover:bg-red-600 shadow">✕</button>
                      </div>
                    )}
                  </div>

                  {/* Hero Upload with Remove Button */}
                  <div>
                    <label className="block text-sm font-semibold text-gray-700 mb-1">Background Image</label>
                    <div className="flex items-center gap-3 flex-wrap">
                      <label className="cursor-pointer bg-gray-100 hover:bg-gray-200 text-gray-800 font-semibold text-sm px-4 py-2 rounded-full transition-colors">
                        <input type="file" accept="image/*" onChange={e => handleUpload(e, 'heroImageUrl', true)} hidden />
                        Choose image…
                      </label>
                      {uploading['heroImageUrl'] && <span className="text-xs text-blue-500">Uploading...</span>}
                    </div>
                    {portal.heroImageUrl && (
                      <div className="mt-2 relative rounded shadow border inline-block w-full">
                        <img src={withBasePath(portal.heroImageUrl)} className="h-32 w-full object-cover rounded" alt="Background preview" />
                        <a href={withBasePath(portal.heroImageUrl)} download={extractFileName(portal.heroImageUrl)} className="absolute top-2 right-12 bg-gray-700 hover:bg-gray-800 text-white w-8 h-8 flex items-center justify-center rounded-full text-sm font-bold shadow-lg" title="Download" aria-label="Download background">⬇</a>
                        <button onClick={() => setPortal({...portal, heroImageUrl: ''})} className="absolute top-2 right-2 bg-red-500 text-white w-8 h-8 flex items-center justify-center rounded-full text-sm font-bold hover:bg-red-600 shadow-lg">✕</button>
                      </div>
                    )}
                  </div>

                  <div className="bg-gray-50 p-4 rounded-lg border border-gray-200 space-y-3">
                     <label className="flex items-center gap-3 cursor-pointer">
                        <input type="checkbox" checked={!!portal.fadeHeroImage} onChange={e => setPortal({...portal, fadeHeroImage: e.target.checked})} className="w-5 h-5 text-blue-600 rounded" />
                        <div>
                          <span className="block text-sm font-semibold text-gray-900">Fade Image into Background Color</span>
                          <span className="block text-xs text-gray-600">Creates a smooth gradient from the top of the image into the solid theme color at the bottom.</span>
                        </div>
                     </label>
                     <label className="flex items-center gap-3 cursor-pointer">
                        <input
                          type="checkbox"
                          checked={portal.externalLinkEnabled ?? EXTERNAL_LINK_DEFAULT}
                          onChange={e => setPortal({...portal, externalLinkEnabled: e.target.checked})}
                          className="w-5 h-5 text-blue-600 rounded"
                        />
                        <div>
                          <span className="block text-sm font-semibold text-gray-900">Enable &ldquo;External Link&rdquo; type in the dropdown menu.</span>
                          <span className="block text-xs text-gray-600">Existing cards of this type will still remain visible and clickable, even if you disable the &ldquo;External Link&rdquo; type.</span>
                        </div>
                     </label>
                  </div>
                </div>
              </div>

              <div className="mt-10 pt-6 border-t border-gray-200">
                <h3 className="text-sm font-bold uppercase tracking-wider text-gray-600 mb-3">Backup &amp; Restore</h3>
                <p className="text-xs text-gray-500 mb-4">
                  The backup contains cards, portal configuration, media (images, videos, PDFs), and uploaded fonts. Restoring overwrites the current state. Clicking the &ldquo;Save backup (ZIP)&rdquo; button saves the Cards structure as <code>interceptor-backup-YYYYMMDD-hhmmss.zip</code>.
                </p>
                <div className="flex flex-wrap gap-3">
                  <button
                    type="button"
                    onClick={handleBackupDownload}
                    className="bg-gray-800 text-white px-5 py-2.5 rounded-lg hover:bg-gray-900 font-medium shadow-sm"
                  >
                    ⬇ Save backup (ZIP)
                  </button>
                  <label className={`cursor-pointer inline-flex items-center bg-amber-600 text-white px-5 py-2.5 rounded-lg hover:bg-amber-700 font-medium shadow-sm ${restoring ? 'opacity-60 cursor-not-allowed' : ''}`}>
                    <input
                      type="file"
                      accept=".zip,application/zip,application/x-zip-compressed"
                      onChange={handleRestoreUpload}
                      disabled={restoring}
                      hidden
                    />
                    {restoring ? 'Restoring…' : '⤴ Restore from ZIP'}
                  </label>
                </div>
              </div>

              <div className="mt-8 pt-6 border-t border-gray-200">
                <h3 className="text-sm font-bold uppercase tracking-wider text-gray-600 mb-3">Factory Preset</h3>
                <p className="text-xs text-gray-500 mb-2">
                  &ldquo;Factory&rdquo; state restorable with one click. The preset (<code>factory/preset.zip</code>) is prepared on the development machine and distributed to MajorNet machines.
                </p>
                <p className="text-xs text-gray-700 mb-4">
                  Current preset: {factoryPreset === null ? '…'
                    : factoryPreset.exists
                      ? <span className="text-green-700 font-medium">present · {((factoryPreset.sizeBytes ?? 0) / (1024 * 1024)).toFixed(1)} MB · {factoryPreset.modifiedAt ? new Date(factoryPreset.modifiedAt).toLocaleString('en-GB') : '?'}</span>
                      : <span className="text-gray-400 italic">no preset configured</span>}
                </p>
                <div className="flex flex-wrap gap-3">
                  <button
                    type="button"
                    onClick={handleFactoryReset}
                    disabled={factoryResetting || !factoryPreset?.exists}
                    title={factoryPreset?.exists ? undefined : 'No preset configured'}
                    className="bg-red-700 text-white px-5 py-2.5 rounded-lg hover:bg-red-800 font-medium shadow-sm disabled:opacity-60 disabled:cursor-not-allowed"
                  >
                    {factoryResetting ? 'Reset in progress…' : 'Factory Reset'}
                  </button>
                  {FACTORY_PRESET_SAVE_ENABLED && (
                    <button
                      type="button"
                      onClick={handleSaveFactoryPreset}
                      disabled={savingPreset}
                      title="Developer function: save the current state as a new factory preset"
                      className="bg-emerald-700 text-white px-5 py-2.5 rounded-lg hover:bg-emerald-800 font-medium shadow-sm disabled:opacity-60"
                    >
                      {savingPreset ? 'Saving…' : 'Save as Factory Preset (dev)'}
                    </button>
                  )}
                </div>
              </div>

              <div className="mt-10 pt-6 border-t border-gray-200 flex justify-end">
                <button onClick={handleSavePortal} disabled={savingPortal} className="bg-blue-600 text-white px-10 py-3 rounded-lg hover:bg-blue-700 font-bold shadow disabled:opacity-50 transition-colors">
                  {savingPortal ? 'Saving...' : 'Save Portal Settings'}
                </button>
              </div>
            </div>
          )}
		  
		  </div> 
      </div> 

      {/* MODAL FOR EDITING/CREATING CARDS */}
      {isEditing && (
        <div 
          className="fixed inset-0 z-50 flex items-center justify-center bg-black/70 backdrop-blur-sm p-4 transition-opacity"
          onClick={() => setIsEditing(null)} // Click outside to close
        >
          <div 
            className="bg-white rounded-2xl w-full max-w-3xl max-h-[90vh] overflow-y-auto shadow-2xl p-6 md:p-8 relative animate-in fade-in zoom-in-95 duration-200"
            onClick={(e) => e.stopPropagation()} // Prevent inside clicks from closing
          >
            <button 
              onClick={() => setIsEditing(null)}
              className="absolute top-6 right-6 text-gray-400 hover:text-gray-900 bg-gray-100 hover:bg-gray-200 rounded-full w-8 h-8 flex items-center justify-center transition-colors"
            >
              ✕
            </button>

            <h3 className="text-2xl font-bold mb-6 text-gray-900 border-b pb-4">
              {isEditing.id ? 'Edit Card' : 'Create New Card'}
            </h3>
            
            <div className="grid grid-cols-1 md:grid-cols-2 gap-8">
              <div className="space-y-5">
                <div>
                  <label className="block text-sm font-semibold text-gray-800 mb-1">Title</label>
                  <input type="text" maxLength={CARD_LIMITS.title} value={isEditing.title || ''} onChange={e => setIsEditing({...isEditing, title: e.target.value})} className={inputClasses} placeholder="e.g., Local History" />
                  <CharCounter value={isEditing.title} limit={CARD_LIMITS.title} />
                </div>
                <div>
                  <label className="block text-sm font-semibold text-gray-800 mb-1">Card Type</label>
                  <StyledSelect<CardType>
                    value={(isEditing.cardType || 'INFO_PAGE') as CardType}
                    onChange={(v) => setIsEditing({ ...isEditing, cardType: v })}
                    options={[
                      { value: 'INFO_PAGE', label: 'Info Page' },
                      { value: 'IMAGE_GALLERY', label: 'Image Gallery' },
                      { value: 'BOOK', label: 'Flip-Book' },
                      { value: 'FULLSCREEN_LOCK', label: 'Fullscreen Lock (kiosk)' },
                      ...(externalLinksOn ? [{ value: 'EXTERNAL_LINK' as CardType, label: 'External Link' }] : []),
                    ]}
                  />
                </div>
                {isEditing.cardType === 'FULLSCREEN_LOCK' && (
                  <div className="bg-red-50 border border-red-200 rounded-lg p-4">
                    <p className="text-sm font-semibold text-red-800">⚠ Kiosk Lock Mode</p>
                    <p className="text-xs text-red-700 mt-1">
                      This card will take full control of the public portal. All other cards will be hidden until you remove this one.
                      Upload an image or video as &quot;Full-screen content&quot; in the section on the right.
                    </p>
                  </div>
                )}
                {isEditing.cardType !== 'FULLSCREEN_LOCK' && (isEditing.cardType === 'EXTERNAL_LINK' ? (
                  <>
                    <div>
                      <label className="block text-sm font-semibold text-gray-800 mb-1">URL <span className="text-red-600">*</span></label>
                      <input
                        type="url"
                        maxLength={CARD_LIMITS.actionUrl}
                        value={isEditing.actionUrl || ''}
                        onChange={e => setIsEditing({ ...isEditing, actionUrl: e.target.value })}
                        className={inputClasses}
                        placeholder="https://example.com/page"
                      />
                      <CharCounter value={isEditing.actionUrl} limit={CARD_LIMITS.actionUrl} />
                    </div>
                    <div>
                      <label className="block text-sm font-semibold text-gray-800 mb-1">Link text</label>
                      <input
                        type="text"
                        maxLength={CARD_LIMITS.shortDescription}
                        value={isEditing.shortDescription || ''}
                        onChange={e => setIsEditing({ ...isEditing, shortDescription: e.target.value })}
                        className={inputClasses}
                        placeholder="e.g. Visit the official site"
                      />
                      <CharCounter value={isEditing.shortDescription} limit={CARD_LIMITS.shortDescription} />
                      <p className="text-xs text-gray-500 mt-1">Text displayed as a clickable link in the modal. If empty, the URL itself is shown.</p>
                    </div>
                    <div className="bg-gray-50 p-3 rounded-lg border border-gray-200">
                      <label className="flex items-start gap-3 cursor-pointer">
                        <input
                          type="checkbox"
                          checked={!!isEditing.redirectOnClick}
                          onChange={e => setIsEditing({ ...isEditing, redirectOnClick: e.target.checked })}
                          className="w-5 h-5 text-blue-600 rounded mt-0.5"
                        />
                        <div>
                          <span className="block text-sm font-semibold text-gray-900">Redirect on click</span>
                          <span className="block text-xs text-gray-600">Cliccando la card sul portale pubblico, il browser apre direttamente l&rsquo;URL senza mostrare il modale.</span>
                        </div>
                      </label>
                    </div>
                  </>
                ) : (
                  <div>
                    <label className="block text-sm font-semibold text-gray-800 mb-1">Short Description</label>
                    <textarea maxLength={CARD_LIMITS.shortDescription} value={isEditing.shortDescription || ''} onChange={e => setIsEditing({ ...isEditing, shortDescription: e.target.value })} className={`${inputClasses} h-24 resize-none`} placeholder="Brief summary..." />
                    <CharCounter value={isEditing.shortDescription} limit={CARD_LIMITS.shortDescription} />
                  </div>
                ))}
                {isEditing.cardType !== 'BOOK' && isEditing.cardType !== 'FULLSCREEN_LOCK' && (
                <div className="bg-gray-50 p-3 rounded-lg border border-gray-200 space-y-3">
                  <label className="flex items-start gap-3 cursor-pointer">
                    <input
                      type="checkbox"
                      checked={!!isEditing.autoFullscreen}
                      onChange={e => setIsEditing({ ...isEditing, autoFullscreen: e.target.checked })}
                      className="w-5 h-5 text-blue-600 rounded mt-0.5"
                    />
                    <div>
                      <span className="block text-sm font-semibold text-gray-900">Auto fullscreen</span>
                      <span className="block text-xs text-gray-600">Open the gallery in fullscreen immediately when the user clicks this card.</span>
                    </div>
                  </label>
                  <label className="flex items-start gap-3 cursor-pointer">
                    <input
                      type="checkbox"
                      checked={!!isEditing.skipPreview}
                      onChange={e => setIsEditing({ ...isEditing, skipPreview: e.target.checked })}
                      className="w-5 h-5 text-blue-600 rounded mt-0.5"
                    />
                    <div>
                      <span className="block text-sm font-semibold text-gray-900">Cover not in the gallery</span>
                      <span className="block text-xs text-gray-600">The cover stays as the card thumbnail only. Combine with &ldquo;Auto fullscreen&rdquo; to jump straight into the gallery items.</span>
                    </div>
                  </label>
                </div>
                )}
              </div>
              <div className="space-y-5">
                {/* Cover Image — per FULLSCREEN_LOCK è il contenuto kiosk a tutto schermo e accetta anche video */}
                <div>
                  <label className="block text-sm font-semibold text-gray-800 mb-1">
                    {isEditing.cardType === 'FULLSCREEN_LOCK'
                      ? <>Full-screen content <span className="text-gray-400 font-normal text-xs">(image or video)</span></>
                      : <>Cover Image <span className="text-gray-400 font-normal text-xs">(shown in grid)</span></>}
                  </label>
                  <div className="border-2 border-dashed border-gray-300 rounded-lg p-3 hover:bg-gray-50 transition-colors">
                    <label className="inline-block cursor-pointer bg-blue-50 hover:bg-blue-100 text-blue-700 font-semibold text-sm px-4 py-2 rounded-full transition-colors">
                      <input
                        type="file"
                        accept={isEditing.cardType === 'FULLSCREEN_LOCK' ? 'image/*,video/mp4,video/webm,.mp4,.webm,.mov,.m4v' : 'image/*'}
                        onChange={e => handleUpload(e, 'imageUrl')}
                        hidden
                      />
                      {isEditing.cardType === 'FULLSCREEN_LOCK' ? 'Choose image or video…' : 'Choose image…'}
                    </label>
                    {uploading['imageUrl'] && <p className="mt-2 text-sm text-blue-600 font-medium">Uploading...</p>}
                  </div>
                  {isEditing.imageUrl && (
                    <div className="mt-3 relative rounded-lg overflow-hidden border border-gray-200 group">
                      {isVideoUrl(isEditing.imageUrl) ? (
                        <video src={withBasePath(isEditing.imageUrl)} className="w-full h-32 object-cover" muted playsInline />
                      ) : (
                        <img src={withBasePath(isEditing.imageUrl)} className="w-full h-32 object-cover" alt="Cover preview" />
                      )}
                      <a
                        href={withBasePath(isEditing.imageUrl)}
                        download={extractFileName(isEditing.imageUrl)}
                        className="absolute top-2 right-12 bg-gray-700 hover:bg-gray-800 text-white w-8 h-8 rounded-full text-sm font-bold shadow opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center"
                        title="Download"
                        aria-label="Download cover"
                      >⬇</a>
                      <button
                        onClick={() => setIsEditing({...isEditing, imageUrl: ''})}
                        className="absolute top-2 right-2 bg-red-500 text-white w-8 h-8 rounded-full text-sm font-bold shadow opacity-0 group-hover:opacity-100 transition-opacity hover:bg-red-600"
                        title="Remove cover image"
                      >✕</button>
                    </div>
                  )}
                </div>

                {/* Gallery Media (images + videos + PDFs) — nascosta per INFO_PAGE (solo cover ammessa) e FULLSCREEN_LOCK (solo contenuto kiosk) */}
                {isEditing.cardType !== 'INFO_PAGE' && isEditing.cardType !== 'FULLSCREEN_LOCK' && (
                <div>
                  <label className="block text-sm font-semibold text-gray-800 mb-1">
                    Gallery Media <span className="text-gray-400 font-normal text-xs">(images, videos or PDFs — PDF pages become images)</span>
                  </label>
                  <div className="border-2 border-dashed border-gray-300 rounded-lg p-3 hover:bg-gray-50 transition-colors">
                    <label className="inline-block cursor-pointer bg-purple-50 hover:bg-purple-100 text-purple-700 font-semibold text-sm px-4 py-2 rounded-full transition-colors">
                      <input
                        type="file"
                        accept="image/*,video/*,application/pdf,.pdf,.mov,.qt,.mkv,.avi,.divx,.wmv,.asf,.flv,.f4v,.3gp,.3gpp,.3g2,.mts,.m2ts,.ts,.mpg,.mpeg,.vob,.mxf,.ogv,.ogg"
                        multiple
                        onChange={handleUploadExtraMedia}
                        hidden
                      />
                      Choose files…
                    </label>
                    {uploading['extraMedia'] && !pdfProgress && <p className="mt-2 text-sm text-purple-600 font-medium">Uploading...</p>}
                    {pdfProgress && (
                      <p className="mt-2 text-sm text-purple-600 font-medium">
                        Processing &ldquo;{pdfProgress.name}&rdquo;: page {pdfProgress.page} of {pdfProgress.total}
                      </p>
                    )}
                  </div>

                  {(isEditing.extraMedia || []).length > 0 && (
                    <div className="mt-3 space-y-2">
                      {(isEditing.extraMedia || []).map((item, i) => {
                        const video = isVideoUrl(item.url);
                        const tc = transcodeJobs[item.url];
                        const isTranscoding = !!tc && (tc.status === 'queued' || tc.status === 'running');
                        return (
                          <div key={item.url + i} className="flex items-center gap-3 p-2 bg-gray-50 border border-gray-200 rounded-lg">
                            <div className="relative w-16 h-16 rounded-md overflow-hidden bg-black shrink-0">
                              {video ? (
                                <>
                                  <video src={withBasePath(item.url)} className="w-full h-full object-cover" muted preload="metadata" />
                                  <div className="absolute inset-0 flex items-center justify-center bg-black/30 text-white text-xl">▶</div>
                                </>
                              ) : (
                                <img src={withBasePath(item.url)} className="w-full h-full object-cover" alt="" />
                              )}
                              {isTranscoding && (
                                <div className="absolute inset-0 flex flex-col items-center justify-center bg-black/75 text-white text-[10px] font-semibold leading-tight gap-0.5">
                                  <span>Transcoding</span>
                                  <span>{Math.round((tc.progress || 0) * 100)}%</span>
                                </div>
                              )}
                              <span className="absolute bottom-0 left-0 right-0 text-center text-white text-[10px] bg-black/60">{i + 1}</span>
                            </div>
                            <div className="flex-1 min-w-0">
                              <div className="text-xs font-semibold text-gray-700 uppercase tracking-wider">
                                {video ? 'Video' : 'Image'}
                              </div>
                              {video && (
                                <div className="mt-1 flex flex-wrap gap-x-4 gap-y-1">
                                  <label className="flex items-center gap-2 cursor-pointer">
                                    <input
                                      type="checkbox"
                                      checked={!!item.autoplay}
                                      onChange={() => toggleAutoplay(i)}
                                      className="w-4 h-4 text-blue-600 rounded"
                                    />
                                    <span className="text-sm text-gray-700">Autoplay</span>
                                  </label>
                                  <label className="flex items-center gap-2 cursor-pointer">
                                    <input
                                      type="checkbox"
                                      checked={!!item.muted}
                                      onChange={() => toggleMuted(i)}
                                      className="w-4 h-4 text-blue-600 rounded"
                                    />
                                    <span className="text-sm text-gray-700">Muted</span>
                                  </label>
                                </div>
                              )}
                            </div>
                            <button
                              onClick={() => moveExtraMedia(i, 'up')}
                              className="p-2 text-gray-500 hover:text-gray-800 hover:bg-gray-200 rounded shrink-0 disabled:opacity-40 disabled:cursor-not-allowed focus:outline-none focus-visible:outline-none"
                              title="Move up"
                              aria-label="Move up"
                              disabled={i === 0}
                            >↑</button>
                            <button
                              onClick={() => moveExtraMedia(i, 'down')}
                              className="p-2 text-gray-500 hover:text-gray-800 hover:bg-gray-200 rounded shrink-0 disabled:opacity-40 disabled:cursor-not-allowed focus:outline-none focus-visible:outline-none"
                              title="Move down"
                              aria-label="Move down"
                              disabled={i === (isEditing.extraMedia || []).length - 1}
                            >↓</button>
                            <a
                              href={withBasePath(item.url)}
                              download={extractFileName(item.url)}
                              className="bg-gray-500 hover:bg-gray-600 text-white w-8 h-8 rounded-full text-sm font-bold shrink-0 flex items-center justify-center"
                              title="Download"
                              aria-label="Download"
                            >⬇</a>
                            <button
                              onClick={() => removeExtraMedia(i)}
                              className="bg-red-500 hover:bg-red-600 text-white w-8 h-8 rounded-full text-sm font-bold shrink-0"
                              title="Remove"
                            >✕</button>
                          </div>
                        );
                      })}
                    </div>
                  )}
                </div>
                )}
              </div>
            </div>

            <div className="flex gap-3 pt-8 mt-6 border-t border-gray-200 justify-end">
              <button onClick={() => setIsEditing(null)} className="px-5 py-2.5 text-gray-700 hover:bg-gray-100 rounded-lg font-medium transition-colors">
                Cancel
              </button>
              <button onClick={handleSaveCard} className="bg-green-600 text-white px-8 py-2.5 rounded-lg hover:bg-green-700 font-medium shadow-sm transition-colors">
                Save Card
              </button>
            </div>
          </div>
        </div>
      )}
	  
	  {/* CUSTOM CONFIRM DIALOG */}
      {confirmDialog && (
        <div className="fixed inset-0 z-[60] flex items-center justify-center bg-black/60 backdrop-blur-sm p-4 animate-in fade-in duration-200">
          <div className="bg-white rounded-xl shadow-2xl p-6 max-w-sm w-full animate-in zoom-in-95">
            <h3 className="text-xl font-bold text-gray-900 mb-2">Confirm Action</h3>
            <p className="text-gray-600 mb-6 leading-relaxed">{confirmDialog.message}</p>
            <div className="flex justify-end gap-3">
              <button 
                onClick={() => setConfirmDialog(null)} 
                className="px-4 py-2.5 text-gray-700 hover:bg-gray-100 rounded-lg font-medium transition-colors"
              >
                Cancel
              </button>
              <button 
                onClick={confirmDialog.onConfirm} 
                className="px-6 py-2.5 bg-red-600 text-white rounded-lg hover:bg-red-700 font-medium transition-colors shadow-sm"
              >
                Delete
              </button>
            </div>
          </div>
        </div>
      )}

      {/* CUSTOM TOAST NOTIFICATION */}
      {toast && (
        <div className={`fixed bottom-6 right-6 z-[70] text-white px-6 py-4 rounded-lg shadow-2xl flex items-start gap-3 animate-in slide-in-from-bottom-5 fade-in duration-300 max-w-md ${
          toast.type === 'error' ? 'bg-red-700' : 'bg-gray-900'
        }`}>
          <div className={`w-6 h-6 rounded-full flex items-center justify-center font-bold text-sm shrink-0 mt-0.5 ${
            toast.type === 'error' ? 'bg-white text-red-700' : 'bg-green-500 text-gray-900'
          }`}>
            {toast.type === 'error' ? '!' : '✓'}
          </div>
          <span className="font-medium leading-snug">{toast.message}</span>
        </div>
      )}

    </div>
  );
}