import React, { useState, useEffect } from 'react';
import { authFetch } from '../lib/auth';
import { User } from '../types';
import {
  Shield, Activity, Save, CheckCircle, AlertCircle, Eye, EyeOff,
  Settings2, KeyRound, Globe, Clock, ChevronRight, Copy, Users, RefreshCw, Terminal,
  Network, Trash2, Plus, HardDrive, Download, Upload, AlertTriangle, Plug, Server, Pencil, X,
} from 'lucide-react';

const SECRET_SENTINEL = '__SET__';

interface RawSettings {
  azure_enabled: string;
  azure_client_id: string;
  azure_tenant_id: string;
  azure_client_secret: string;
  azure_redirect_uri: string;
  azure_allowed_group: string;
  checkmk_enabled: string;
  checkmk_api_url: string;
  checkmk_api_user: string;
  checkmk_api_secret: string;
  checkmk_sync_interval_ms: string;
  semaphore_enabled: string;
  semaphore_api_url: string;
  semaphore_api_token: string;
  semaphore_project_id: string;
  caddy_enabled: string;
  caddy_admin_url: string;
}

interface CaddyRoute {
  id: number;
  hostname: string;
  upstream: string;
  tls: number;
  compress: number;
}

interface DbInfo {
  sizeBytes: number;
  lastModified: string;
  tables: Record<string, number>;
  path: string;
}

interface SettingsProps {
  currentUser: User;
}

function Label({ children }: { children: React.ReactNode }) {
  return <label className="block text-[11px] font-semibold text-slate-400 uppercase tracking-wide mb-1.5">{children}</label>;
}

function Hint({ children }: { children: React.ReactNode }) {
  return <p className="mt-1 text-[10px] text-slate-500 font-mono leading-relaxed">{children}</p>;
}

function ConfiguredBadge() {
  return (
    <span className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-[9px] font-semibold bg-emerald-950/60 border border-emerald-900/50 text-emerald-400">
      <span className="w-1 h-1 rounded-full bg-emerald-400 inline-block" />
      CONFIGURED
    </span>
  );
}

function FieldRow({ label, hint, badge, children }: {
  label: string;
  hint?: string;
  badge?: React.ReactNode;
  children: React.ReactNode;
}) {
  return (
    <div className="space-y-1.5">
      <div className="flex items-center justify-between">
        <Label>{label}</Label>
        {badge}
      </div>
      {children}
      {hint && <Hint>{hint}</Hint>}
    </div>
  );
}

function Input({ value, onChange, placeholder, monospace, icon }: {
  value: string;
  onChange: (v: string) => void;
  placeholder?: string;
  monospace?: boolean;
  icon?: React.ReactNode;
}) {
  return (
    <div className="relative">
      {icon && (
        <span className="absolute left-3 top-1/2 -translate-y-1/2 text-slate-500 pointer-events-none">
          {icon}
        </span>
      )}
      <input
        type="text"
        value={value}
        onChange={e => onChange(e.target.value)}
        placeholder={placeholder}
        className={`w-full bg-slate-900 border border-slate-700 rounded-lg py-2.5 text-sm text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-cyan-500/50 focus:border-cyan-500/50 transition-all ${icon ? 'pl-9 pr-3' : 'px-3'} ${monospace ? 'font-mono text-xs' : ''}`}
      />
    </div>
  );
}

function SecretInput({ value, onChange, alreadySet, show, onToggleShow }: {
  value: string;
  onChange: (v: string) => void;
  alreadySet: boolean;
  show: boolean;
  onToggleShow: () => void;
}) {
  return (
    <div className="relative">
      <span className="absolute left-3 top-1/2 -translate-y-1/2 text-slate-500 pointer-events-none">
        <KeyRound className="w-3.5 h-3.5" />
      </span>
      <input
        type={show ? 'text' : 'password'}
        value={value}
        onChange={e => onChange(e.target.value)}
        placeholder={alreadySet ? '••••••••  (leave blank to keep)' : 'Secret'}
        className="w-full bg-slate-900 border border-slate-700 rounded-lg pl-9 pr-10 py-2.5 text-xs font-mono text-white placeholder-slate-500 focus:outline-none focus:ring-2 focus:ring-cyan-500/50 focus:border-cyan-500/50 transition-all"
      />
      <button
        type="button"
        onClick={onToggleShow}
        className="absolute right-3 top-1/2 -translate-y-1/2 text-slate-500 hover:text-slate-300 transition-colors"
        tabIndex={-1}
      >
        {show ? <EyeOff className="w-3.5 h-3.5" /> : <Eye className="w-3.5 h-3.5" />}
      </button>
    </div>
  );
}

function SectionCard({ accentColor, children }: {
  accentColor: string;
  children: React.ReactNode;
}) {
  return (
    <div className="bg-[#0F172A] border border-[#1E293B] rounded-2xl overflow-hidden">
      <div className={`h-0.5 w-full ${accentColor}`} />
      <div className="p-6 space-y-5">
        {children}
      </div>
    </div>
  );
}

export default function Settings({ currentUser: _currentUser }: SettingsProps) {
  const [loading, setLoading] = useState(true);
  const [saving, setSaving] = useState(false);
  const [activeSection, setActiveSection] = useState<'integrations' | 'system'>('integrations');
  const [error, setError] = useState('');
  const [successMsg, setSuccessMsg] = useState('');
  const [copied, setCopied] = useState(false);

  const [effectiveRedirectUri, setEffectiveRedirectUri] = useState('');

  const [azureEnabled, setAzureEnabled] = useState(false);
  const [azureClientId, setAzureClientId] = useState('');
  const [azureTenantId, setAzureTenantId] = useState('');
  const [azureClientSecret, setAzureClientSecret] = useState('');
  const [azureSecretSet, setAzureSecretSet] = useState(false);
  const [azureRedirectUri, setAzureRedirectUri] = useState('');
  const [azureAllowedGroup, setAzureAllowedGroup] = useState('');
  const [showAzureSecret, setShowAzureSecret] = useState(false);

  const [checkmkEnabled, setCheckmkEnabled] = useState(false);
  const [checkmkApiUrl, setCheckmkApiUrl] = useState('');
  const [checkmkApiUser, setCheckmkApiUser] = useState('automation');
  const [checkmkApiSecret, setCheckmkApiSecret] = useState('');
  const [checkmkSecretSet, setCheckmkSecretSet] = useState(false);
  const [checkmkSyncInterval, setCheckmkSyncInterval] = useState('60000');
  const [showCheckmkSecret, setShowCheckmkSecret] = useState(false);
  const [syncing, setSyncing] = useState(false);

  const [semaphoreEnabled, setSemaphoreEnabled] = useState(false);
  const [semaphoreApiUrl, setSemaphoreApiUrl] = useState('');
  const [semaphoreApiToken, setSemaphoreApiToken] = useState('');
  const [semaphoreTokenSet, setSemaphoreTokenSet] = useState(false);
  const [semaphoreProjectId, setSemaphoreProjectId] = useState('');
  const [showSemaphoreToken, setShowSemaphoreToken] = useState(false);
  const [semaphoreTesting, setSemaphoreTesting] = useState(false);
  const [semaphoreTestResult, setSemaphoreTestResult] = useState<string | null>(null);

  const [caddyEnabled, setCaddyEnabled] = useState(false);
  const [caddyAdminUrl, setCaddyAdminUrl] = useState('http://localhost:2019');
  const [caddyStatus, setCaddyStatus] = useState<'unknown' | 'available' | 'unavailable'>('unknown');
  const [caddyRoutes, setCaddyRoutes] = useState<{ system: { hostname: string; upstream: string }[]; custom: CaddyRoute[] } | null>(null);
  const [addingRoute, setAddingRoute] = useState(false);
  const [newHostname, setNewHostname] = useState('');
  const [newUpstream, setNewUpstream] = useState('');
  const [newTls, setNewTls] = useState(true);
  const [newCompress, setNewCompress] = useState(true);

  const [editingRouteId, setEditingRouteId] = useState<number | null>(null);
  const [editHostname, setEditHostname] = useState('');
  const [editUpstream, setEditUpstream] = useState('');
  const [editTls, setEditTls] = useState(true);
  const [editCompress, setEditCompress] = useState(true);
  const [savingRoute, setSavingRoute] = useState(false);

  const [dbInfo, setDbInfo] = useState<DbInfo | null>(null);
  const [backingUp, setBackingUp] = useState(false);
  const [importFile, setImportFile] = useState<File | null>(null);
  const [importing, setImporting] = useState(false);
  const [importConfirmed, setImportConfirmed] = useState(false);
  const [importResult, setImportResult] = useState<{ ok: boolean; msg: string } | null>(null);

  useEffect(() => {
    loadSettings();
    loadDbInfo();
    fetch('/api/auth/config')
      .then(r => r.json())
      .then(d => { if (d.effectiveRedirectUri) setEffectiveRedirectUri(d.effectiveRedirectUri); })
      .catch(() => {});
  }, []);

  useEffect(() => {
    if (caddyEnabled) loadCaddyRoutes();
  }, [caddyEnabled]);

  async function loadSettings() {
    setLoading(true);
    setError('');
    try {
      const res = await authFetch('/api/settings');
      if (!res.ok) {
        let msg = `Failed to load settings (HTTP ${res.status}).`;
        try { const d = await res.json(); if (d.error) msg = `${d.error} (HTTP ${res.status})`; } catch {}
        setError(msg);
        return;
      }
      const data: RawSettings = await res.json();
      setAzureEnabled(data.azure_enabled === 'true');
      setAzureClientId(data.azure_client_id || '');
      setAzureTenantId(data.azure_tenant_id || '');
      setAzureSecretSet(data.azure_client_secret === SECRET_SENTINEL);
      setAzureClientSecret('');
      setAzureRedirectUri(data.azure_redirect_uri || '');
      setAzureAllowedGroup(data.azure_allowed_group || '');
      setCheckmkEnabled(data.checkmk_enabled === 'true');
      setCheckmkApiUrl(data.checkmk_api_url || '');
      setCheckmkApiUser(data.checkmk_api_user || 'automation');
      setCheckmkSecretSet(data.checkmk_api_secret === SECRET_SENTINEL);
      setCheckmkApiSecret('');
      setCheckmkSyncInterval(data.checkmk_sync_interval_ms || '60000');
      setSemaphoreEnabled(data.semaphore_enabled === 'true');
      setSemaphoreApiUrl(data.semaphore_api_url || '');
      setSemaphoreTokenSet(data.semaphore_api_token === SECRET_SENTINEL);
      setSemaphoreApiToken('');
      setSemaphoreProjectId(data.semaphore_project_id || '');
      setCaddyEnabled(data.caddy_enabled === 'true');
      setCaddyAdminUrl(data.caddy_admin_url || 'http://localhost:2019');
    } catch {
      setError('Network error loading settings.');
    } finally {
      setLoading(false);
    }
  }

  async function handleSave() {
    setSaving(true);
    setError('');
    setSuccessMsg('');
    const payload: Record<string, string> = {
      azure_enabled: azureEnabled ? 'true' : 'false',
      azure_client_id: azureClientId,
      azure_tenant_id: azureTenantId,
      azure_redirect_uri: azureRedirectUri,
      azure_allowed_group: azureAllowedGroup,
      checkmk_enabled: checkmkEnabled ? 'true' : 'false',
      checkmk_api_url: checkmkApiUrl,
      checkmk_api_user: checkmkApiUser,
      checkmk_sync_interval_ms: checkmkSyncInterval,
      semaphore_enabled: semaphoreEnabled ? 'true' : 'false',
      semaphore_api_url: semaphoreApiUrl,
      semaphore_project_id: semaphoreProjectId,
      caddy_enabled: caddyEnabled ? 'true' : 'false',
      caddy_admin_url: caddyAdminUrl,
    };
    if (azureClientSecret) payload.azure_client_secret = azureClientSecret;
    if (checkmkApiSecret) payload.checkmk_api_secret = checkmkApiSecret;
    if (semaphoreApiToken) payload.semaphore_api_token = semaphoreApiToken;
    try {
      const res = await authFetch('/api/settings', { method: 'PUT', body: JSON.stringify(payload) });
      if (!res.ok) {
        const d = await res.json();
        setError(d.error || 'Failed to save settings.');
        return;
      }
      const data: RawSettings = await res.json();
      setAzureSecretSet(data.azure_client_secret === SECRET_SENTINEL);
      setCheckmkSecretSet(data.checkmk_api_secret === SECRET_SENTINEL);
      setSemaphoreTokenSet(data.semaphore_api_token === SECRET_SENTINEL);
      setAzureClientSecret('');
      setCheckmkApiSecret('');
      setSemaphoreApiToken('');
      await loadCaddyRoutes();
      setSuccessMsg('Settings saved successfully.');
      setTimeout(() => setSuccessMsg(''), 4000);
    } catch {
      setError('Network error saving settings.');
    } finally {
      setSaving(false);
    }
  }

  async function runSync() {
    setSyncing(true);
    setError('');
    try {
      const res = await authFetch('/api/checkmk/sync', { method: 'POST' });
      if (!res.ok) {
        const d = await res.json();
        setError(d.error || 'Sync failed.');
        return;
      }
      setSuccessMsg('CheckMK sync triggered successfully.');
      setTimeout(() => setSuccessMsg(''), 4000);
    } catch {
      setError('Network error during sync.');
    } finally {
      setSyncing(false);
    }
  }

  async function testSemaphoreConnection() {
    setSemaphoreTesting(true);
    setSemaphoreTestResult(null);
    try {
      const res = await authFetch('/api/semaphore/templates');
      if (!res.ok) {
        const d = await res.json();
        setSemaphoreTestResult(`Error: ${d.error || `HTTP ${res.status}`}`);
        return;
      }
      const templates = await res.json() as any[];
      setSemaphoreTestResult(`Connected — ${templates.length} task template${templates.length !== 1 ? 's' : ''} found.`);
    } catch {
      setSemaphoreTestResult('Error: Network error connecting to Semaphore.');
    } finally {
      setSemaphoreTesting(false);
    }
  }

  function copyRedirectUri() {
    if (!effectiveRedirectUri) return;
    navigator.clipboard.writeText(effectiveRedirectUri).then(() => {
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    }).catch(() => {});
  }

  async function loadCaddyRoutes() {
    // Status check is background — never blocks route display
    authFetch('/api/caddy/status')
      .then(res => res.ok ? res.json() : null)
      .then(s => setCaddyStatus(s?.available ? 'available' : 'unavailable'))
      .catch(() => setCaddyStatus('unavailable'));

    // Routes load immediately from DB
    try {
      const res = await authFetch('/api/caddy/routes');
      if (res.ok) setCaddyRoutes(await res.json());
    } catch {}
  }

  async function handleAddRoute() {
    if (!newHostname.trim() || !newUpstream.trim()) return;
    setAddingRoute(true);
    try {
      const res = await authFetch('/api/caddy/routes', {
        method: 'POST',
        body: JSON.stringify({ hostname: newHostname.trim(), upstream: newUpstream.trim(), tls: newTls, compress: newCompress }),
      });
      if (!res.ok) {
        const d = await res.json();
        setError(d.error || 'Failed to add route.');
        return;
      }
      setNewHostname('');
      setNewUpstream('');
      setNewTls(true);
      setNewCompress(true);
      await loadCaddyRoutes();
    } catch {
      setError('Network error adding route.');
    } finally {
      setAddingRoute(false);
    }
  }

  async function handleDeleteRoute(id: number) {
    try {
      const res = await authFetch(`/api/caddy/routes/${id}`, { method: 'DELETE' });
      if (!res.ok && res.status !== 204) {
        const d = await res.json().catch(() => ({}));
        setError((d as any).error || 'Failed to delete route.');
        return;
      }
      await loadCaddyRoutes();
    } catch {
      setError('Network error deleting route.');
    }
  }

  function handleEditStart(r: CaddyRoute) {
    setEditingRouteId(r.id);
    setEditHostname(r.hostname);
    setEditUpstream(r.upstream);
    setEditTls(r.tls === 1);
    setEditCompress(r.compress === 1);
  }

  function handleEditCancel() {
    setEditingRouteId(null);
  }

  async function handleEditSave(id: number) {
    if (!editHostname.trim() || !editUpstream.trim()) return;
    setSavingRoute(true);
    try {
      const res = await authFetch(`/api/caddy/routes/${id}`, {
        method: 'PUT',
        body: JSON.stringify({ hostname: editHostname.trim(), upstream: editUpstream.trim(), tls: editTls, compress: editCompress }),
      });
      if (!res.ok) {
        const d = await res.json();
        setError(d.error || 'Failed to update route.');
        return;
      }
      setEditingRouteId(null);
      await loadCaddyRoutes();
    } catch {
      setError('Network error updating route.');
    } finally {
      setSavingRoute(false);
    }
  }

  async function loadDbInfo() {
    try {
      const res = await authFetch('/api/database/info');
      if (res.ok) setDbInfo(await res.json());
    } catch {}
  }

  async function handleBackup() {
    setBackingUp(true);
    setError('');
    try {
      const res = await authFetch('/api/database/backup');
      if (!res.ok) {
        const d = await res.json().catch(() => ({}));
        setError((d as any).error || 'Backup failed.');
        return;
      }
      const blob = await res.blob();
      const url = URL.createObjectURL(blob);
      const a = document.createElement('a');
      a.href = url;
      a.download = `ghostgrid-backup-${new Date().toISOString().slice(0, 10)}.db`;
      document.body.appendChild(a);
      a.click();
      document.body.removeChild(a);
      URL.revokeObjectURL(url);
    } catch {
      setError('Network error during backup.');
    } finally {
      setBackingUp(false);
    }
  }

  async function handleImport() {
    if (!importFile || !importConfirmed) return;
    setImporting(true);
    setImportResult(null);
    try {
      const res = await authFetch('/api/database/import', {
        method: 'POST',
        headers: { 'Content-Type': 'application/octet-stream' },
        body: importFile,
      });
      if (!res.ok) {
        const d = await res.json().catch(() => ({}));
        setImportResult({ ok: false, msg: (d as any).error || 'Import failed.' });
        return;
      }
      setImportResult({ ok: true, msg: 'Database imported successfully. Reload the page to reflect all changes.' });
      setImportFile(null);
      setImportConfirmed(false);
      loadDbInfo();
      loadSettings();
    } catch {
      setImportResult({ ok: false, msg: 'Network error during import.' });
    } finally {
      setImporting(false);
    }
  }

  function formatBytes(bytes: number): string {
    if (bytes < 1024) return `${bytes} B`;
    if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
    return `${(bytes / 1024 / 1024).toFixed(2)} MB`;
  }

  if (loading) {
    return (
      <div className="flex items-center justify-center h-64">
        <span className="w-5 h-5 border-2 border-slate-700 border-t-cyan-400 rounded-full animate-spin" />
      </div>
    );
  }

  return (
    <div className="space-y-6">

      {/* Page header */}
      <div className="flex items-start justify-between gap-4">
        <div>
          <div className="flex items-center gap-1.5 text-[10px] font-mono text-slate-600 mb-3">
            <Settings2 className="w-3 h-3" />
            <span>SYSTEM</span>
            <ChevronRight className="w-3 h-3" />
            <span className="text-slate-400">SETTINGS</span>
          </div>
          <h1 className="text-xl font-bold text-white tracking-tight">Settings</h1>
          <p className="text-xs text-slate-500 mt-0.5">Configure integrations and authentication providers.</p>
        </div>
        <button
          onClick={handleSave}
          disabled={saving}
          className="shrink-0 flex items-center gap-2 bg-cyan-600 hover:bg-cyan-500 active:bg-cyan-700 disabled:bg-slate-800 disabled:text-slate-600 disabled:border disabled:border-slate-700 text-white font-semibold text-sm px-5 py-2.5 rounded-xl transition-all shadow-lg shadow-cyan-950/50"
        >
          {saving ? (
            <span className="w-4 h-4 border-2 border-white/30 border-t-white rounded-full animate-spin" />
          ) : (
            <Save className="w-4 h-4" />
          )}
          {saving ? 'Saving…' : 'Save Settings'}
        </button>
      </div>

      {/* Feedback banners */}
      {error && (
        <div className="flex items-start gap-2.5 bg-red-950/40 border border-red-900/50 rounded-xl px-4 py-3 text-xs text-red-300">
          <AlertCircle className="w-4 h-4 shrink-0 text-red-400 mt-0.5" />
          <span>{error}</span>
        </div>
      )}
      {successMsg && (
        <div className="flex items-center gap-2.5 bg-emerald-950/40 border border-emerald-900/50 rounded-xl px-4 py-3 text-xs text-emerald-300">
          <CheckCircle className="w-4 h-4 shrink-0 text-emerald-400" />
          {successMsg}
        </div>
      )}

      {/* Section tabs — switch between Integrations and System to keep the page light */}
      <div className="inline-flex items-center gap-0.5 p-0.5 bg-slate-900/50 border border-slate-800 rounded-lg w-fit">
        {([
          { id: 'integrations', label: 'Integrations', icon: <Plug className="w-3.5 h-3.5" /> },
          { id: 'system', label: 'System', icon: <Server className="w-3.5 h-3.5" /> },
        ] as const).map(tab => (
          <button
            key={tab.id}
            type="button"
            onClick={() => setActiveSection(tab.id)}
            className={`flex items-center gap-1.5 px-3 py-1.5 rounded-md text-xs font-medium transition-all ${
              activeSection === tab.id
                ? 'bg-cyan-950/40 border border-cyan-900/50 text-cyan-400'
                : 'border border-transparent text-slate-400 hover:text-slate-200 hover:bg-slate-800'
            }`}
          >
            {tab.icon}
            {tab.label}
          </button>
        ))}
      </div>

      {/* ── Integrations: Azure in column one, monitoring & automation stacked in column two ── */}
      {activeSection === 'integrations' && (
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6 items-start">

      {/* ── Microsoft Entra ID ── */}
      <SectionCard accentColor="bg-gradient-to-r from-blue-600 to-indigo-600">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-blue-950/60 border border-blue-900/40 rounded-xl">
              <Shield className="w-4 h-4 text-blue-400" />
            </div>
            <div>
              <div className="flex items-center gap-2">
                <h2 className="text-sm font-semibold text-white">Microsoft Entra ID</h2>
                {azureEnabled && azureSecretSet && (
                  <span className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-[9px] font-semibold bg-blue-950/60 border border-blue-900/50 text-blue-400">
                    <span className="w-1 h-1 rounded-full bg-blue-400 animate-pulse inline-block" />
                    ACTIVE
                  </span>
                )}
              </div>
              <p className="text-[11px] text-slate-500 mt-0.5">OAuth 2.0 SSO for organizational accounts</p>
            </div>
          </div>
          <div className="flex items-center gap-2.5">
            <span className={`text-[10px] font-semibold font-mono ${azureEnabled ? 'text-blue-400' : 'text-slate-600'}`}>
              {azureEnabled ? 'ENABLED' : 'DISABLED'}
            </span>
            <button
              type="button"
              onClick={() => setAzureEnabled(v => !v)}
              className={`relative w-10 h-5 rounded-full transition-all duration-200 focus:outline-none ${azureEnabled ? 'bg-blue-600 shadow-[0_0_10px_rgba(37,99,235,0.4)]' : 'bg-slate-800 border border-slate-700'}`}
            >
              <span className={`absolute top-0.5 w-4 h-4 bg-white rounded-full shadow transition-all duration-200 ${azureEnabled ? 'left-5' : 'left-0.5'}`} />
            </button>
          </div>
        </div>

        <div className="h-px bg-slate-800/60" />

        <div className={`grid grid-cols-1 sm:grid-cols-2 gap-5 transition-opacity duration-200 ${!azureEnabled ? 'opacity-40 pointer-events-none' : ''}`}>
          <FieldRow label="Tenant ID" hint="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx">
            <Input value={azureTenantId} onChange={setAzureTenantId} placeholder="Tenant ID" monospace />
          </FieldRow>
          <FieldRow label="Client ID (Application ID)" hint="xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx">
            <Input value={azureClientId} onChange={setAzureClientId} placeholder="Client ID" monospace />
          </FieldRow>
          <FieldRow
            label="Client Secret"
            badge={azureSecretSet ? <ConfiguredBadge /> : undefined}
          >
            <SecretInput
              value={azureClientSecret}
              onChange={setAzureClientSecret}
              alreadySet={azureSecretSet}
              show={showAzureSecret}
              onToggleShow={() => setShowAzureSecret(v => !v)}
            />
          </FieldRow>
          <div className="sm:col-span-2">
            <FieldRow
              label="Redirect URI"
              hint="Must match exactly what is registered in Azure Portal > App registrations > Authentication. Leave blank to auto-derive from APP_URL."
            >
              <Input
                value={azureRedirectUri}
                onChange={setAzureRedirectUri}
                placeholder={effectiveRedirectUri || 'https://…/api/auth/azure/callback'}
                monospace
              />
            </FieldRow>
          </div>
          <FieldRow
            label="Allowed Group"
            hint="Object ID of an Azure AD group. If set, only members of this group can sign in."
          >
            <Input
              value={azureAllowedGroup}
              onChange={setAzureAllowedGroup}
              placeholder="Leave blank to allow all tenant users"
              monospace
              icon={<Users className="w-3.5 h-3.5" />}
            />
          </FieldRow>
        </div>

        {/* Redirect URI – read-only */}
        {effectiveRedirectUri && azureEnabled && (
          <div className="flex items-start gap-3 bg-slate-900/60 border border-slate-700/60 rounded-xl px-4 py-3">
            <div className="flex-1 min-w-0">
              <p className="text-[10px] font-semibold text-slate-400 uppercase tracking-wide mb-1">Required Redirect URI</p>
              <p className="text-[11px] font-mono text-slate-200 break-all">{effectiveRedirectUri}</p>
              <p className="text-[10px] text-slate-500 mt-1">Register this in Azure Portal &gt; App registrations &gt; Authentication &gt; Redirect URIs</p>
            </div>
            <button
              type="button"
              onClick={copyRedirectUri}
              className="shrink-0 p-1.5 rounded-lg text-slate-500 hover:text-slate-200 hover:bg-slate-800 transition-all"
              title="Copy to clipboard"
            >
              {copied ? <CheckCircle className="w-4 h-4 text-emerald-400" /> : <Copy className="w-4 h-4" />}
            </button>
          </div>
        )}
      </SectionCard>

      {/* Monitoring & automation, stacked together in the second column */}
      <div className="space-y-6">

      {/* ── CheckMK ── */}
      <SectionCard accentColor="bg-gradient-to-r from-emerald-600 to-teal-600">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-emerald-950/60 border border-emerald-900/40 rounded-xl">
              <Activity className="w-4 h-4 text-emerald-400" />
            </div>
            <div>
              <div className="flex items-center gap-2">
                <h2 className="text-sm font-semibold text-white">CheckMK</h2>
                {checkmkEnabled && checkmkApiUrl && checkmkSecretSet && (
                  <span className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-[9px] font-semibold bg-emerald-950/60 border border-emerald-900/50 text-emerald-400">
                    <span className="w-1 h-1 rounded-full bg-emerald-400 animate-pulse inline-block" />
                    ACTIVE
                  </span>
                )}
              </div>
              <p className="text-[11px] text-slate-500 mt-0.5">Device status sync via CheckMK REST API</p>
            </div>
          </div>
          <div className="flex items-center gap-2.5">
            <span className={`text-[10px] font-semibold font-mono ${checkmkEnabled ? 'text-emerald-400' : 'text-slate-600'}`}>
              {checkmkEnabled ? 'ENABLED' : 'DISABLED'}
            </span>
            <button
              type="button"
              onClick={() => setCheckmkEnabled(v => !v)}
              className={`relative w-10 h-5 rounded-full transition-all duration-200 focus:outline-none ${checkmkEnabled ? 'bg-emerald-600 shadow-[0_0_10px_rgba(5,150,105,0.4)]' : 'bg-slate-800 border border-slate-700'}`}
            >
              <span className={`absolute top-0.5 w-4 h-4 bg-white rounded-full shadow transition-all duration-200 ${checkmkEnabled ? 'left-5' : 'left-0.5'}`} />
            </button>
          </div>
        </div>

        <div className="h-px bg-slate-800/60" />

        <div className={`space-y-5 transition-opacity duration-200 ${!checkmkEnabled ? 'opacity-40 pointer-events-none' : ''}`}>
          <FieldRow label="API URL">
            <Input
              value={checkmkApiUrl}
              onChange={setCheckmkApiUrl}
              placeholder="https://checkmk/<site>/check_mk/api/1.0"
              monospace
              icon={<Globe className="w-3.5 h-3.5" />}
            />
          </FieldRow>
          <div className="grid grid-cols-1 sm:grid-cols-2 gap-5">
            <FieldRow label="Automation User" hint="Setup > Users > Automation user (e.g. automation)">
              <Input
                value={checkmkApiUser}
                onChange={setCheckmkApiUser}
                placeholder="automation"
                monospace
                icon={<KeyRound className="w-3.5 h-3.5" />}
              />
            </FieldRow>
            <FieldRow
              label="Automation Secret"
              hint="Setup > Users > Automation user > Automation secret"
              badge={checkmkSecretSet ? <ConfiguredBadge /> : undefined}
            >
              <SecretInput
                value={checkmkApiSecret}
                onChange={setCheckmkApiSecret}
                alreadySet={checkmkSecretSet}
                show={showCheckmkSecret}
                onToggleShow={() => setShowCheckmkSecret(v => !v)}
              />
            </FieldRow>
            <FieldRow label="Sync Interval" hint="Milliseconds between status polls (default: 60000)">
              <Input
                value={checkmkSyncInterval}
                onChange={setCheckmkSyncInterval}
                placeholder="60000"
                monospace
                icon={<Clock className="w-3.5 h-3.5" />}
              />
            </FieldRow>
          </div>
          {checkmkApiUrl && checkmkSecretSet && (
            <button
              type="button"
              onClick={runSync}
              disabled={syncing}
              className="flex items-center gap-2 bg-emerald-950/60 hover:bg-emerald-900/40 border border-emerald-900/50 text-emerald-400 text-xs font-semibold px-3 py-2 rounded-lg transition-all disabled:opacity-50 disabled:cursor-not-allowed"
            >
              <RefreshCw className={`w-3.5 h-3.5 ${syncing ? 'animate-spin' : ''}`} />
              {syncing ? 'Syncing…' : 'Run sync now'}
            </button>
          )}
        </div>
      </SectionCard>

      {/* ── Ansible Semaphore ── */}
      <SectionCard accentColor="bg-gradient-to-r from-orange-600 to-amber-600">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-orange-950/60 border border-orange-900/40 rounded-xl">
              <Terminal className="w-4 h-4 text-orange-400" />
            </div>
            <div>
              <div className="flex items-center gap-2">
                <h2 className="text-sm font-semibold text-white">Ansible Semaphore</h2>
                {semaphoreEnabled && semaphoreApiUrl && semaphoreTokenSet && semaphoreProjectId && (
                  <span className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-[9px] font-semibold bg-orange-950/60 border border-orange-900/50 text-orange-400">
                    <span className="w-1 h-1 rounded-full bg-orange-400 animate-pulse inline-block" />
                    ACTIVE
                  </span>
                )}
              </div>
              <p className="text-[11px] text-slate-500 mt-0.5">Trigger playbooks automatically at booking start and end</p>
            </div>
          </div>
          <div className="flex items-center gap-2.5">
            <span className={`text-[10px] font-semibold font-mono ${semaphoreEnabled ? 'text-orange-400' : 'text-slate-600'}`}>
              {semaphoreEnabled ? 'ENABLED' : 'DISABLED'}
            </span>
            <button
              type="button"
              onClick={() => setSemaphoreEnabled(v => !v)}
              className={`relative w-10 h-5 rounded-full transition-all duration-200 focus:outline-none ${semaphoreEnabled ? 'bg-orange-600 shadow-[0_0_10px_rgba(234,88,12,0.4)]' : 'bg-slate-800 border border-slate-700'}`}
            >
              <span className={`absolute top-0.5 w-4 h-4 bg-white rounded-full shadow transition-all duration-200 ${semaphoreEnabled ? 'left-5' : 'left-0.5'}`} />
            </button>
          </div>
        </div>

        <div className="h-px bg-slate-800/60" />

        <div className={`space-y-5 transition-opacity duration-200 ${!semaphoreEnabled ? 'opacity-40 pointer-events-none' : ''}`}>
          <FieldRow label="API URL">
            <Input
              value={semaphoreApiUrl}
              onChange={setSemaphoreApiUrl}
              placeholder="https://semaphore/api/v1alpha"
              monospace
              icon={<Globe className="w-3.5 h-3.5" />}
            />
          </FieldRow>
          <div className="grid grid-cols-1 sm:grid-cols-2 gap-5">
            <FieldRow
              label="API Token"
              hint="Profile > API Tokens in Semaphore"
              badge={semaphoreTokenSet ? <ConfiguredBadge /> : undefined}
            >
              <SecretInput
                value={semaphoreApiToken}
                onChange={setSemaphoreApiToken}
                alreadySet={semaphoreTokenSet}
                show={showSemaphoreToken}
                onToggleShow={() => setShowSemaphoreToken(v => !v)}
              />
            </FieldRow>
            <FieldRow label="Project ID" hint="Numeric ID from the Semaphore project URL">
              <Input
                value={semaphoreProjectId}
                onChange={setSemaphoreProjectId}
                placeholder="1"
                monospace
                icon={<KeyRound className="w-3.5 h-3.5" />}
              />
            </FieldRow>
          </div>
          {semaphoreApiUrl && semaphoreTokenSet && semaphoreProjectId && (
            <div className="space-y-2">
              <button
                type="button"
                onClick={testSemaphoreConnection}
                disabled={semaphoreTesting}
                className="flex items-center gap-2 bg-orange-950/60 hover:bg-orange-900/40 border border-orange-900/50 text-orange-400 text-xs font-semibold px-3 py-2 rounded-lg transition-all disabled:opacity-50 disabled:cursor-not-allowed"
              >
                <RefreshCw className={`w-3.5 h-3.5 ${semaphoreTesting ? 'animate-spin' : ''}`} />
                {semaphoreTesting ? 'Testing…' : 'Test connection'}
              </button>
              {semaphoreTestResult && (
                <p className={`text-[11px] font-mono ${semaphoreTestResult.startsWith('Error') ? 'text-red-400' : 'text-emerald-400'}`}>
                  {semaphoreTestResult}
                </p>
              )}
            </div>
          )}
        </div>
      </SectionCard>

      </div>{/* end second column */}

      </div>
      )}

      {/* ── System ── */}
      {activeSection === 'system' && (
      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6 items-start">

      {/* ── Caddy Reverse Proxy ── */}
      <SectionCard accentColor="bg-gradient-to-r from-sky-600 to-cyan-600">
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-sky-950/60 border border-sky-900/40 rounded-xl">
              <Network className="w-4 h-4 text-sky-400" />
            </div>
            <div>
              <div className="flex items-center gap-2">
                <h2 className="text-sm font-semibold text-white">Caddy Reverse Proxy</h2>
                {caddyEnabled && caddyStatus === 'available' && (
                  <span className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-[9px] font-semibold bg-sky-950/60 border border-sky-900/50 text-sky-400">
                    <span className="w-1 h-1 rounded-full bg-sky-400 animate-pulse inline-block" />
                    ACTIVE
                  </span>
                )}
              </div>
              <p className="text-[11px] text-slate-500 mt-0.5">Manage reverse proxy routes for internal services</p>
            </div>
          </div>
          <div className="flex items-center gap-2.5">
            <span className={`text-[10px] font-semibold font-mono ${caddyEnabled ? 'text-sky-400' : 'text-slate-600'}`}>
              {caddyEnabled ? 'ENABLED' : 'DISABLED'}
            </span>
            <button
              type="button"
              onClick={() => setCaddyEnabled((v: boolean) => !v)}
              className={`relative w-10 h-5 rounded-full transition-all duration-200 focus:outline-none ${caddyEnabled ? 'bg-sky-600 shadow-[0_0_10px_rgba(2,132,199,0.4)]' : 'bg-slate-800 border border-slate-700'}`}
            >
              <span className={`absolute top-0.5 w-4 h-4 bg-white rounded-full shadow transition-all duration-200 ${caddyEnabled ? 'left-5' : 'left-0.5'}`} />
            </button>
          </div>
        </div>

        <div className="h-px bg-slate-800/60" />

        <div className={`space-y-5 transition-opacity duration-200 ${!caddyEnabled ? 'opacity-40 pointer-events-none' : ''}`}>
          <FieldRow label="Caddy Admin URL" hint="Default: http://localhost:2019">
            <Input value={caddyAdminUrl} onChange={setCaddyAdminUrl} placeholder="http://localhost:2019" monospace icon={<Globe className="w-3.5 h-3.5" />} />
          </FieldRow>

          {/* Route list */}
          {caddyEnabled && (
            <div className="space-y-2">
              <Label>Proxy Routes</Label>

              {caddyStatus === 'unavailable' && (
                <p className="text-[11px] font-mono text-amber-400 mb-2">
                  Caddy Admin API not reachable — routes will be applied when Caddy starts.
                </p>
              )}

              {/* Custom routes */}
              {caddyRoutes?.custom.map(r => (
                <div key={r.id} className="bg-slate-900/60 border border-slate-700/60 rounded-xl px-4 py-2.5">
                  {editingRouteId === r.id ? (
                    <div className="flex items-end gap-2">
                      <div className="flex-1 min-w-0">
                        <Label>Hostname</Label>
                        <Input value={editHostname} onChange={setEditHostname} placeholder="hostname" monospace />
                      </div>
                      <div className="flex-1 min-w-0">
                        <Label>Upstream</Label>
                        <Input value={editUpstream} onChange={setEditUpstream} placeholder="127.0.0.1:3000" monospace />
                      </div>
                      <div className="flex flex-col items-center gap-1 pb-0.5">
                        <span className="text-[9px] font-semibold text-slate-400 uppercase tracking-wide">TLS</span>
                        <button type="button" onClick={() => setEditTls(v => !v)}
                          className={`relative w-8 h-4 rounded-full transition-all duration-200 focus:outline-none ${editTls ? 'bg-sky-600' : 'bg-slate-800 border border-slate-700'}`}>
                          <span className={`absolute top-0.5 w-3 h-3 bg-white rounded-full shadow transition-all duration-200 ${editTls ? 'left-4' : 'left-0.5'}`} />
                        </button>
                      </div>
                      <div className="flex flex-col items-center gap-1 pb-0.5">
                        <span className="text-[9px] font-semibold text-slate-400 uppercase tracking-wide">GZ</span>
                        <button type="button" onClick={() => setEditCompress(v => !v)}
                          className={`relative w-8 h-4 rounded-full transition-all duration-200 focus:outline-none ${editCompress ? 'bg-sky-600' : 'bg-slate-800 border border-slate-700'}`}>
                          <span className={`absolute top-0.5 w-3 h-3 bg-white rounded-full shadow transition-all duration-200 ${editCompress ? 'left-4' : 'left-0.5'}`} />
                        </button>
                      </div>
                      <button type="button" onClick={() => handleEditSave(r.id)} disabled={savingRoute || !editHostname.trim() || !editUpstream.trim()}
                        className="flex items-center gap-1 bg-sky-950/60 hover:bg-sky-900/40 border border-sky-900/50 text-sky-400 text-xs font-semibold px-2.5 py-2 rounded-lg transition-all disabled:opacity-50 shrink-0">
                        <CheckCircle className="w-3.5 h-3.5" />
                      </button>
                      <button type="button" onClick={handleEditCancel}
                        className="p-2 rounded-lg text-slate-500 hover:text-slate-300 hover:bg-slate-800 transition-all shrink-0">
                        <X className="w-3.5 h-3.5" />
                      </button>
                    </div>
                  ) : (
                    <div className="flex items-center justify-between">
                      <div className="flex items-center gap-3 min-w-0">
                        <span className="text-[11px] font-mono text-white truncate">{r.hostname}</span>
                        <span className="text-slate-600 text-[11px]">&gt;</span>
                        <span className="text-[11px] font-mono text-slate-400 truncate">{r.upstream}</span>
                        {r.tls ? <span className="text-[9px] font-semibold text-sky-500 font-mono">TLS</span> : null}
                        {r.compress ? <span className="text-[9px] font-semibold text-slate-500 font-mono">GZ</span> : null}
                      </div>
                      <div className="flex items-center gap-1 ml-3 shrink-0">
                        <button type="button" onClick={() => handleEditStart(r)}
                          className="p-1.5 rounded-lg text-slate-600 hover:text-sky-400 hover:bg-sky-950/30 transition-all" title="Edit route">
                          <Pencil className="w-3.5 h-3.5" />
                        </button>
                        <button type="button" onClick={() => handleDeleteRoute(r.id)}
                          className="p-1.5 rounded-lg text-slate-600 hover:text-red-400 hover:bg-red-950/30 transition-all" title="Remove route">
                          <Trash2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </div>
                  )}
                </div>
              ))}

              {/* Add route form */}
              <div className="flex items-end gap-2 pt-1">
                <div className="flex-1 min-w-0">
                  <Label>Hostname</Label>
                  <Input value={newHostname} onChange={setNewHostname} placeholder="semaphore" monospace />
                </div>
                <div className="flex-1 min-w-0">
                  <Label>Upstream</Label>
                  <Input value={newUpstream} onChange={setNewUpstream} placeholder="127.0.0.1:3000" monospace />
                </div>
                <div className="flex flex-col items-center gap-1 pb-0.5">
                  <span className="text-[9px] font-semibold text-slate-400 uppercase tracking-wide">TLS</span>
                  <button
                    type="button"
                    onClick={() => setNewTls(v => !v)}
                    className={`relative w-8 h-4 rounded-full transition-all duration-200 focus:outline-none ${newTls ? 'bg-sky-600' : 'bg-slate-800 border border-slate-700'}`}
                  >
                    <span className={`absolute top-0.5 w-3 h-3 bg-white rounded-full shadow transition-all duration-200 ${newTls ? 'left-4' : 'left-0.5'}`} />
                  </button>
                </div>
                <div className="flex flex-col items-center gap-1 pb-0.5">
                  <span className="text-[9px] font-semibold text-slate-400 uppercase tracking-wide">GZ</span>
                  <button
                    type="button"
                    onClick={() => setNewCompress(v => !v)}
                    className={`relative w-8 h-4 rounded-full transition-all duration-200 focus:outline-none ${newCompress ? 'bg-sky-600' : 'bg-slate-800 border border-slate-700'}`}
                  >
                    <span className={`absolute top-0.5 w-3 h-3 bg-white rounded-full shadow transition-all duration-200 ${newCompress ? 'left-4' : 'left-0.5'}`} />
                  </button>
                </div>
                <button
                  type="button"
                  onClick={handleAddRoute}
                  disabled={addingRoute || !newHostname.trim() || !newUpstream.trim()}
                  className="flex items-center gap-1.5 bg-sky-950/60 hover:bg-sky-900/40 border border-sky-900/50 text-sky-400 text-xs font-semibold px-3 py-2 rounded-lg transition-all disabled:opacity-50 disabled:cursor-not-allowed shrink-0"
                >
                  <Plus className="w-3.5 h-3.5" />
                  {addingRoute ? 'Adding…' : 'Add'}
                </button>
              </div>
            </div>
          )}
        </div>
      </SectionCard>

      {/* ── Database ── */}
      <SectionCard accentColor="bg-gradient-to-r from-violet-600 to-purple-600">

        {/* Header: icon + title + file size */}
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-violet-950/60 border border-violet-900/40 rounded-xl">
              <HardDrive className="w-4 h-4 text-violet-400" />
            </div>
            <div>
              <h2 className="text-sm font-semibold text-white">Database</h2>
              <p className="text-[11px] text-slate-500 mt-0.5">SQLite · {dbInfo?.path ?? 'ghostgrid.db'}</p>
            </div>
          </div>
          <div className="text-right">
            <p className="text-xl font-bold text-white font-mono leading-none">
              {dbInfo ? formatBytes(dbInfo.sizeBytes) : '—'}
            </p>
            <p className="text-[10px] text-slate-500 font-mono mt-1">
              {dbInfo ? new Date(dbInfo.lastModified).toLocaleDateString() : 'Loading…'}
            </p>
          </div>
        </div>

        <div className="h-px bg-slate-800/60" />

        {/* Proportional usage bar + table stats */}
        {dbInfo ? (() => {
          const tableEntries = Object.entries(dbInfo.tables) as [string, number][];
          const total = tableEntries.reduce((sum, [, n]) => sum + n, 0);
          const palette: Record<string, string> = {
            users: 'bg-blue-500', devices: 'bg-emerald-500', labs: 'bg-orange-500',
            bookings: 'bg-cyan-500', logs: 'bg-slate-400', links: 'bg-violet-500',
            settings: 'bg-slate-600', caddy: 'bg-sky-500',
          };
          return (
            <div className="space-y-3">
              <div className="flex h-1.5 rounded-full overflow-hidden bg-slate-800 gap-px">
                {total === 0
                  ? <div className="flex-1 bg-slate-700" />
                  : tableEntries.filter(([, n]) => n > 0).map(([t, n]) => (
                      <div
                        key={t}
                        title={`${t}: ${n}`}
                        className={`${palette[t] ?? 'bg-slate-500'} transition-all`}
                        style={{ width: `${(n / total) * 100}%` }}
                      />
                    ))
                }
              </div>
              <div className="grid grid-cols-4 gap-1.5">
                {tableEntries.map(([t, n]) => (
                  <div key={t} className="bg-slate-900/50 border border-slate-700/60 rounded-lg px-2 py-1.5">
                    <div className={`w-1.5 h-1.5 rounded-full mb-1 ${palette[t] ?? 'bg-slate-500'}`} />
                    <p className="text-[8px] font-semibold text-slate-600 uppercase tracking-wide truncate">{t}</p>
                    <p className="text-sm font-bold text-white font-mono">{n}</p>
                  </div>
                ))}
              </div>
            </div>
          );
        })() : (
          <div className="h-16 flex items-center justify-center">
            <span className="w-4 h-4 border-2 border-slate-700 border-t-violet-400 rounded-full animate-spin" />
          </div>
        )}

        <div className="h-px bg-slate-800/60" />

        {/* Actions */}
        <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">

          {/* Backup */}
          <div className="space-y-2">
            <Label>Backup</Label>
            <button
              type="button"
              onClick={handleBackup}
              disabled={backingUp}
              className="w-full flex items-center justify-center gap-2 bg-violet-950/60 hover:bg-violet-900/40 border border-violet-900/50 text-violet-400 text-xs font-semibold px-3 py-2 rounded-lg transition-all disabled:opacity-50 disabled:cursor-not-allowed"
            >
              <Download className={`w-3.5 h-3.5 ${backingUp ? 'animate-pulse' : ''}`} />
              {backingUp ? 'Creating backup…' : 'Download Backup'}
            </button>
            <Hint>Downloads a consistent snapshot of the SQLite database.</Hint>
          </div>

          {/* Import */}
          <div className="space-y-2">
            <Label>Import</Label>
            <div className="flex items-start gap-2 bg-amber-950/40 border border-amber-900/50 rounded-xl px-3 py-2">
              <AlertTriangle className="w-3.5 h-3.5 text-amber-400 shrink-0 mt-0.5" />
              <p className="text-[11px] text-amber-300 leading-relaxed">
                <strong>Import overwrites the entire database</strong> — this cannot be undone.
              </p>
            </div>
            <label className="w-full flex items-center gap-2 cursor-pointer bg-slate-900 border border-slate-700 hover:border-slate-600 rounded-lg px-3 py-2 text-xs text-slate-400 hover:text-slate-200 transition-all">
              <Upload className="w-3.5 h-3.5 shrink-0" />
              <span className="truncate">{importFile ? importFile.name : 'Select .db file…'}</span>
              <input
                type="file"
                accept=".db"
                className="sr-only"
                onChange={e => {
                  setImportFile(e.target.files?.[0] ?? null);
                  setImportConfirmed(false);
                  setImportResult(null);
                }}
              />
            </label>
            {importFile && (
              <div className="space-y-2">
                <label className="flex items-center gap-2 cursor-pointer select-none">
                  <input
                    type="checkbox"
                    checked={importConfirmed}
                    onChange={e => setImportConfirmed(e.target.checked)}
                    className="w-3.5 h-3.5 rounded accent-violet-500"
                  />
                  <span className="text-[11px] text-slate-400">I confirm this will overwrite all existing data</span>
                </label>
                <button
                  type="button"
                  onClick={handleImport}
                  disabled={importing || !importConfirmed}
                  className="w-full flex items-center justify-center gap-2 bg-red-950/60 hover:bg-red-900/40 border border-red-900/50 text-red-400 text-xs font-semibold px-3 py-2 rounded-lg transition-all disabled:opacity-50 disabled:cursor-not-allowed"
                >
                  {importing
                    ? <span className="w-3.5 h-3.5 border-2 border-red-400/30 border-t-red-400 rounded-full animate-spin" />
                    : <Upload className="w-3.5 h-3.5" />
                  }
                  {importing ? 'Importing…' : 'Import Database'}
                </button>
              </div>
            )}
            {importResult && (
              <p className={`text-[11px] font-mono ${importResult.ok ? 'text-emerald-400' : 'text-red-400'}`}>
                {importResult.msg}
              </p>
            )}
          </div>

        </div>
      </SectionCard>

      </div>
      )}

    </div>
  );
}