'use client'

/**
 * VVT — Verarbeitungsverzeichnis (Art. 30 DSGVO)
 *
 * 4 Tabs:
 * 1. Verzeichnis (Uebersicht aller Verarbeitungstaetigkeiten)
 * 2. Verarbeitung bearbeiten (Detail-Editor)
 * 3. Generator (Profiling-Fragebogen)
 * 4. Export & Compliance
 */

import { useState, useEffect, useCallback } from 'react'
import { useSDK } from '@/lib/sdk'
import StepHeader, { STEP_EXPLANATIONS } from '@/components/sdk/StepHeader/StepHeader'
import {
  DATA_SUBJECT_CATEGORY_META,
  PERSONAL_DATA_CATEGORY_META,
  LEGAL_BASIS_META,
  TRANSFER_MECHANISM_META,
  ART9_CATEGORIES,
  BUSINESS_FUNCTION_LABELS,
  STATUS_LABELS,
  STATUS_COLORS,
  PROTECTION_LEVEL_LABELS,
  DEPLOYMENT_LABELS,
  REVIEW_INTERVAL_LABELS,
  createEmptyActivity,
  createDefaultOrgHeader,
  generateVVTId,
  isSpecialCategory,
} from '@/lib/sdk/vvt-types'
import type { VVTActivity, VVTOrganizationHeader, BusinessFunction } from '@/lib/sdk/vvt-types'
import {
  PROFILING_STEPS,
  PROFILING_QUESTIONS,
  getQuestionsForStep,
  getStepProgress,
  getTotalProgress,
  generateActivities,
} from '@/lib/sdk/vvt-profiling'
import type { ProfilingAnswers } from '@/lib/sdk/vvt-profiling'

// =============================================================================
// CONSTANTS
// =============================================================================

type Tab = 'verzeichnis' | 'editor' | 'generator' | 'export'

const PROFILING_STORAGE_KEY = 'bp_vvt_profiling'

// =============================================================================
// API CLIENT
// =============================================================================

const VVT_API_BASE = '/api/sdk/v1/compliance/vvt'

function activityFromApi(raw: any): VVTActivity {
  return {
    id: raw.id,
    vvtId: raw.vvt_id,
    name: raw.name || '',
    description: raw.description || '',
    purposes: raw.purposes || [],
    legalBases: raw.legal_bases || [],
    dataSubjectCategories: raw.data_subject_categories || [],
    personalDataCategories: raw.personal_data_categories || [],
    recipientCategories: raw.recipient_categories || [],
    thirdCountryTransfers: raw.third_country_transfers || [],
    retentionPeriod: raw.retention_period || { description: '' },
    tomDescription: raw.tom_description || '',
    businessFunction: raw.business_function || 'other',
    systems: raw.systems || [],
    deploymentModel: raw.deployment_model || 'cloud',
    dataSources: raw.data_sources || [],
    dataFlows: raw.data_flows || [],
    protectionLevel: raw.protection_level || 'MEDIUM',
    dpiaRequired: raw.dpia_required || false,
    structuredToms: raw.structured_toms || { accessControl: [], confidentiality: [], integrity: [], availability: [], separation: [] },
    status: raw.status || 'DRAFT',
    responsible: raw.responsible || '',
    owner: raw.owner || '',
    createdAt: raw.created_at || new Date().toISOString(),
    updatedAt: raw.updated_at || raw.created_at || new Date().toISOString(),
  }
}

function activityToApi(act: VVTActivity): Record<string, unknown> {
  return {
    vvt_id: act.vvtId,
    name: act.name,
    description: act.description,
    purposes: act.purposes,
    legal_bases: act.legalBases,
    data_subject_categories: act.dataSubjectCategories,
    personal_data_categories: act.personalDataCategories,
    recipient_categories: act.recipientCategories,
    third_country_transfers: act.thirdCountryTransfers,
    retention_period: act.retentionPeriod,
    tom_description: act.tomDescription,
    business_function: act.businessFunction,
    systems: act.systems,
    deployment_model: act.deploymentModel,
    data_sources: act.dataSources,
    data_flows: act.dataFlows,
    protection_level: act.protectionLevel,
    dpia_required: act.dpiaRequired,
    structured_toms: act.structuredToms,
    status: act.status,
    responsible: act.responsible,
    owner: act.owner,
  }
}

function orgHeaderFromApi(raw: any): VVTOrganizationHeader {
  return {
    organizationName: raw.organization_name || '',
    industry: raw.industry || '',
    locations: raw.locations || [],
    employeeCount: raw.employee_count || 0,
    dpoName: raw.dpo_name || '',
    dpoContact: raw.dpo_contact || '',
    vvtVersion: raw.vvt_version || '1.0',
    lastReviewDate: raw.last_review_date || '',
    nextReviewDate: raw.next_review_date || '',
    reviewInterval: raw.review_interval || 'annual',
  }
}

function orgHeaderToApi(org: VVTOrganizationHeader): Record<string, unknown> {
  return {
    organization_name: org.organizationName,
    industry: org.industry,
    locations: org.locations,
    employee_count: org.employeeCount,
    dpo_name: org.dpoName,
    dpo_contact: org.dpoContact,
    vvt_version: org.vvtVersion,
    last_review_date: org.lastReviewDate || null,
    next_review_date: org.nextReviewDate || null,
    review_interval: org.reviewInterval,
  }
}

async function apiListActivities(): Promise<VVTActivity[]> {
  const res = await fetch(`${VVT_API_BASE}/activities`)
  if (!res.ok) throw new Error(`GET activities failed: ${res.status}`)
  const data = await res.json()
  return data.map(activityFromApi)
}

async function apiGetOrganization(): Promise<VVTOrganizationHeader | null> {
  const res = await fetch(`${VVT_API_BASE}/organization`)
  if (!res.ok) return null
  const data = await res.json()
  if (!data) return null
  return orgHeaderFromApi(data)
}

async function apiCreateActivity(act: VVTActivity): Promise<VVTActivity> {
  const res = await fetch(`${VVT_API_BASE}/activities`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(activityToApi(act)),
  })
  if (!res.ok) throw new Error(`POST activity failed: ${res.status}`)
  return activityFromApi(await res.json())
}

async function apiUpdateActivity(id: string, act: VVTActivity): Promise<VVTActivity> {
  const res = await fetch(`${VVT_API_BASE}/activities/${id}`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(activityToApi(act)),
  })
  if (!res.ok) throw new Error(`PUT activity failed: ${res.status}`)
  return activityFromApi(await res.json())
}

async function apiDeleteActivity(id: string): Promise<void> {
  const res = await fetch(`${VVT_API_BASE}/activities/${id}`, { method: 'DELETE' })
  if (!res.ok) throw new Error(`DELETE activity failed: ${res.status}`)
}

async function apiUpsertOrganization(org: VVTOrganizationHeader): Promise<VVTOrganizationHeader> {
  const res = await fetch(`${VVT_API_BASE}/organization`, {
    method: 'PUT',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(orgHeaderToApi(org)),
  })
  if (!res.ok) throw new Error(`PUT organization failed: ${res.status}`)
  return orgHeaderFromApi(await res.json())
}

// =============================================================================
// MAIN PAGE
// =============================================================================

export default function VVTPage() {
  const { state } = useSDK()
  const [tab, setTab] = useState<Tab>('verzeichnis')
  const [activities, setActivities] = useState<VVTActivity[]>([])
  const [orgHeader, setOrgHeader] = useState<VVTOrganizationHeader>(createDefaultOrgHeader())
  const [profilingAnswers, setProfilingAnswers] = useState<ProfilingAnswers>({})
  const [editingId, setEditingId] = useState<string | null>(null)
  const [filter, setFilter] = useState('all')
  const [searchQuery, setSearchQuery] = useState('')
  const [sortBy, setSortBy] = useState<'name' | 'date' | 'status'>('name')
  const [generatorStep, setGeneratorStep] = useState(1)
  const [generatorPreview, setGeneratorPreview] = useState<VVTActivity[] | null>(null)
  const [isLoading, setIsLoading] = useState(true)
  const [apiError, setApiError] = useState<string | null>(null)

  // Load profiling answers from localStorage (UI state only)
  useEffect(() => {
    try {
      const stored = localStorage.getItem(PROFILING_STORAGE_KEY)
      if (stored) setProfilingAnswers(JSON.parse(stored))
    } catch { /* ignore */ }
  }, [])

  // Load activities + org header from API
  useEffect(() => {
    async function loadFromApi() {
      setIsLoading(true)
      setApiError(null)
      try {
        const [acts, org] = await Promise.all([
          apiListActivities(),
          apiGetOrganization(),
        ])
        setActivities(acts)
        if (org) setOrgHeader(org)
      } catch (err) {
        setApiError('Fehler beim Laden der VVT-Daten. Bitte Verbindung prüfen.')
        console.error('VVT API load error:', err)
      } finally {
        setIsLoading(false)
      }
    }
    loadFromApi()
  }, [])

  const updateProfilingAnswers = useCallback((prof: ProfilingAnswers) => {
    setProfilingAnswers(prof)
    try {
      localStorage.setItem(PROFILING_STORAGE_KEY, JSON.stringify(prof))
    } catch { /* ignore */ }
  }, [])

  // Computed stats
  const activeCount = activities.filter(a => a.status === 'APPROVED').length
  const draftCount = activities.filter(a => a.status === 'DRAFT').length
  const thirdCountryCount = activities.filter(a => a.thirdCountryTransfers.length > 0).length
  const art9Count = activities.filter(a => a.personalDataCategories.some(c => ART9_CATEGORIES.includes(c))).length

  // Filtered & sorted activities
  const filteredActivities = activities
    .filter(a => {
      const matchesFilter = filter === 'all' || a.status === filter || (filter === 'thirdcountry' && a.thirdCountryTransfers.length > 0) || (filter === 'art9' && a.personalDataCategories.some(c => ART9_CATEGORIES.includes(c)))
      const matchesSearch = searchQuery === '' ||
        a.name.toLowerCase().includes(searchQuery.toLowerCase()) ||
        a.description.toLowerCase().includes(searchQuery.toLowerCase()) ||
        a.vvtId.toLowerCase().includes(searchQuery.toLowerCase())
      return matchesFilter && matchesSearch
    })
    .sort((a, b) => {
      if (sortBy === 'name') return a.name.localeCompare(b.name)
      if (sortBy === 'date') return new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime()
      return a.status.localeCompare(b.status)
    })

  const editingActivity = editingId ? activities.find(a => a.id === editingId) : null

  const stepInfo = STEP_EXPLANATIONS['vvt']

  // Tab buttons
  const tabs: { id: Tab; label: string; count?: number }[] = [
    { id: 'verzeichnis', label: 'Verzeichnis', count: activities.length },
    { id: 'editor', label: 'Verarbeitung bearbeiten' },
    { id: 'generator', label: 'Generator' },
    { id: 'export', label: 'Export & Compliance' },
  ]

  if (isLoading) {
    return (
      <div className="flex items-center justify-center h-64">
        <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-purple-600"></div>
      </div>
    )
  }

  return (
    <div className="space-y-6">
      <StepHeader
        stepId="vvt"
        title={stepInfo.title}
        description={stepInfo.description}
        explanation={stepInfo.explanation}
        tips={stepInfo.tips}
      />

      {apiError && (
        <div className="bg-red-50 border border-red-200 rounded-lg p-4 text-sm text-red-700">
          {apiError}
        </div>
      )}

      {/* Tab Navigation */}
      <div className="flex items-center gap-1 bg-gray-100 p-1 rounded-lg">
        {tabs.map(t => (
          <button
            key={t.id}
            onClick={() => setTab(t.id)}
            className={`flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-md transition-colors ${
              tab === t.id ? 'bg-white text-purple-700 shadow-sm' : 'text-gray-600 hover:text-gray-900'
            }`}
          >
            {t.label}
            {t.count !== undefined && (
              <span className={`px-1.5 py-0.5 text-xs rounded-full ${tab === t.id ? 'bg-purple-100 text-purple-700' : 'bg-gray-200 text-gray-500'}`}>
                {t.count}
              </span>
            )}
          </button>
        ))}
      </div>

      {/* Tab Content */}
      {tab === 'verzeichnis' && (
        <TabVerzeichnis
          activities={filteredActivities}
          allActivities={activities}
          activeCount={activeCount}
          draftCount={draftCount}
          thirdCountryCount={thirdCountryCount}
          art9Count={art9Count}
          filter={filter}
          setFilter={setFilter}
          searchQuery={searchQuery}
          setSearchQuery={setSearchQuery}
          sortBy={sortBy}
          setSortBy={setSortBy}
          onEdit={(id) => { setEditingId(id); setTab('editor') }}
          onNew={async () => {
            const vvtId = generateVVTId(activities.map(a => a.vvtId))
            const newAct = createEmptyActivity(vvtId)
            try {
              const created = await apiCreateActivity(newAct)
              setActivities(prev => [...prev, created])
              setEditingId(created.id)
              setTab('editor')
            } catch (err) {
              setApiError('Fehler beim Anlegen der Verarbeitung.')
              console.error(err)
            }
          }}
          onDelete={async (id) => {
            try {
              await apiDeleteActivity(id)
              setActivities(prev => prev.filter(a => a.id !== id))
            } catch (err) {
              setApiError('Fehler beim Löschen der Verarbeitung.')
              console.error(err)
            }
          }}
        />
      )}

      {tab === 'editor' && (
        <TabEditor
          activity={editingActivity}
          activities={activities}
          onSave={async (updated) => {
            try {
              const saved = await apiUpdateActivity(updated.id, updated)
              setActivities(prev => prev.map(a => a.id === saved.id ? saved : a))
            } catch (err) {
              setApiError('Fehler beim Speichern der Verarbeitung.')
              console.error(err)
            }
          }}
          onBack={() => setTab('verzeichnis')}
          onSelectActivity={(id) => setEditingId(id)}
        />
      )}

      {tab === 'generator' && (
        <TabGenerator
          step={generatorStep}
          setStep={setGeneratorStep}
          answers={profilingAnswers}
          setAnswers={updateProfilingAnswers}
          preview={generatorPreview}
          setPreview={setGeneratorPreview}
          onAdoptAll={async (newActivities) => {
            const created: VVTActivity[] = []
            for (const act of newActivities) {
              try {
                const saved = await apiCreateActivity(act)
                created.push(saved)
              } catch (err) {
                console.error('Failed to create activity from generator:', err)
              }
            }
            if (created.length > 0) setActivities(prev => [...prev, ...created])
            setGeneratorPreview(null)
            setGeneratorStep(1)
            setTab('verzeichnis')
          }}
        />
      )}

      {tab === 'export' && (
        <TabExport
          activities={activities}
          orgHeader={orgHeader}
          onUpdateOrgHeader={async (org) => {
            try {
              const saved = await apiUpsertOrganization(org)
              setOrgHeader(saved)
            } catch (err) {
              setApiError('Fehler beim Speichern der Organisationsdaten.')
              console.error(err)
            }
          }}
        />
      )}
    </div>
  )
}

// =============================================================================
// TAB 1: VERZEICHNIS
// =============================================================================

function TabVerzeichnis({
  activities, allActivities, activeCount, draftCount, thirdCountryCount, art9Count,
  filter, setFilter, searchQuery, setSearchQuery, sortBy, setSortBy,
  onEdit, onNew, onDelete,
}: {
  activities: VVTActivity[]
  allActivities: VVTActivity[]
  activeCount: number
  draftCount: number
  thirdCountryCount: number
  art9Count: number
  filter: string
  setFilter: (f: string) => void
  searchQuery: string
  setSearchQuery: (q: string) => void
  sortBy: string
  setSortBy: (s: 'name' | 'date' | 'status') => void
  onEdit: (id: string) => void
  onNew: () => void
  onDelete: (id: string) => void
}) {
  return (
    <div className="space-y-4">
      {/* Stats */}
      <div className="grid grid-cols-2 md:grid-cols-5 gap-3">
        <StatCard label="Gesamt" value={allActivities.length} color="gray" />
        <StatCard label="Genehmigt" value={activeCount} color="green" />
        <StatCard label="Entwurf" value={draftCount} color="yellow" />
        <StatCard label="Drittland" value={thirdCountryCount} color="orange" />
        <StatCard label="Art. 9 Daten" value={art9Count} color="red" />
      </div>

      {/* Search + Filter + New */}
      <div className="flex flex-col md:flex-row items-start md:items-center gap-3">
        <div className="flex-1 relative w-full">
          <svg className="w-5 h-5 text-gray-400 absolute left-3 top-1/2 -translate-y-1/2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
          </svg>
          <input
            type="text"
            value={searchQuery}
            onChange={(e) => setSearchQuery(e.target.value)}
            placeholder="VVT-ID, Name oder Beschreibung suchen..."
            className="w-full pl-10 pr-4 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent"
          />
        </div>
        <div className="flex items-center gap-2 flex-wrap">
          {[
            { key: 'all', label: 'Alle' },
            { key: 'DRAFT', label: 'Entwurf' },
            { key: 'REVIEW', label: 'Pruefung' },
            { key: 'APPROVED', label: 'Genehmigt' },
            { key: 'thirdcountry', label: 'Drittland' },
            { key: 'art9', label: 'Art. 9' },
          ].map(f => (
            <button
              key={f.key}
              onClick={() => setFilter(f.key)}
              className={`px-3 py-1 text-sm rounded-full transition-colors ${
                filter === f.key ? 'bg-purple-600 text-white' : 'bg-gray-100 text-gray-600 hover:bg-gray-200'
              }`}
            >
              {f.label}
            </button>
          ))}
        </div>
        <select
          value={sortBy}
          onChange={(e) => setSortBy(e.target.value as 'name' | 'date' | 'status')}
          className="px-3 py-2 border border-gray-300 rounded-lg text-sm"
        >
          <option value="name">Name</option>
          <option value="date">Datum</option>
          <option value="status">Status</option>
        </select>
        <button
          onClick={onNew}
          className="flex items-center gap-2 px-4 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700 transition-colors text-sm whitespace-nowrap"
        >
          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
          </svg>
          Neue Verarbeitung
        </button>
      </div>

      {/* Activity Cards */}
      <div className="space-y-3">
        {activities.map(activity => (
          <ActivityCard key={activity.id} activity={activity} onEdit={onEdit} onDelete={onDelete} />
        ))}
      </div>

      {activities.length === 0 && (
        <div className="bg-white rounded-xl border border-gray-200 p-12 text-center">
          <div className="w-16 h-16 mx-auto bg-gray-100 rounded-full flex items-center justify-center mb-4">
            <svg className="w-8 h-8 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
            </svg>
          </div>
          <h3 className="text-lg font-semibold text-gray-900">Keine Verarbeitungen gefunden</h3>
          <p className="mt-2 text-gray-500 max-w-md mx-auto">
            Erstellen Sie eine neue Verarbeitung manuell oder nutzen Sie den Generator, um automatisch Eintraege aus einem Fragebogen zu erzeugen.
          </p>
        </div>
      )}
    </div>
  )
}

function StatCard({ label, value, color }: { label: string; value: number; color: string }) {
  const borderColors: Record<string, string> = {
    gray: 'border-gray-200', green: 'border-green-200', yellow: 'border-yellow-200', orange: 'border-orange-200', red: 'border-red-200',
  }
  const textColors: Record<string, string> = {
    gray: 'text-gray-600', green: 'text-green-600', yellow: 'text-yellow-600', orange: 'text-orange-600', red: 'text-red-600',
  }
  return (
    <div className={`bg-white rounded-xl border ${borderColors[color]} p-4`}>
      <div className={`text-sm ${textColors[color]}`}>{label}</div>
      <div className={`text-2xl font-bold ${textColors[color]}`}>{value}</div>
    </div>
  )
}

function ActivityCard({ activity, onEdit, onDelete }: { activity: VVTActivity; onEdit: (id: string) => void; onDelete: (id: string) => void }) {
  const hasArt9 = activity.personalDataCategories.some(c => ART9_CATEGORIES.includes(c))
  const hasThirdCountry = activity.thirdCountryTransfers.length > 0

  return (
    <div className="bg-white rounded-xl border border-gray-200 p-5 hover:border-purple-200 transition-colors">
      <div className="flex items-start justify-between">
        <div className="flex-1 min-w-0">
          <div className="flex items-center gap-2 mb-1 flex-wrap">
            <span className="text-xs font-mono text-gray-400">{activity.vvtId}</span>
            <span className={`px-2 py-0.5 text-xs rounded-full ${STATUS_COLORS[activity.status] || 'bg-gray-100 text-gray-600'}`}>
              {STATUS_LABELS[activity.status] || activity.status}
            </span>
            {hasArt9 && (
              <span className="px-2 py-0.5 text-xs bg-red-100 text-red-700 rounded-full">Art. 9</span>
            )}
            {hasThirdCountry && (
              <span className="px-2 py-0.5 text-xs bg-orange-100 text-orange-700 rounded-full">Drittland</span>
            )}
            {activity.dpiaRequired && (
              <span className="px-2 py-0.5 text-xs bg-purple-100 text-purple-700 rounded-full">DSFA</span>
            )}
          </div>
          <h3 className="text-base font-semibold text-gray-900 truncate">{activity.name || '(Ohne Namen)'}</h3>
          {activity.description && (
            <p className="text-sm text-gray-500 mt-0.5 line-clamp-1">{activity.description}</p>
          )}
          <div className="flex items-center gap-4 mt-2 text-xs text-gray-400">
            <span>{BUSINESS_FUNCTION_LABELS[activity.businessFunction]}</span>
            <span>{activity.responsible || 'Kein Verantwortlicher'}</span>
            <span>Aktualisiert: {new Date(activity.updatedAt).toLocaleDateString('de-DE')}</span>
          </div>
        </div>
        <div className="flex items-center gap-1 ml-4">
          <button
            onClick={() => onEdit(activity.id)}
            className="px-3 py-1.5 text-sm text-purple-600 hover:bg-purple-50 rounded-lg transition-colors"
          >
            Bearbeiten
          </button>
          <button
            onClick={() => { if (confirm('Verarbeitung loeschen?')) onDelete(activity.id) }}
            className="px-2 py-1.5 text-sm text-gray-400 hover:text-red-500 hover:bg-red-50 rounded-lg transition-colors"
          >
            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
            </svg>
          </button>
        </div>
      </div>
    </div>
  )
}

// =============================================================================
// TAB 2: EDITOR
// =============================================================================

function TabEditor({
  activity, activities, onSave, onBack, onSelectActivity,
}: {
  activity: VVTActivity | null | undefined
  activities: VVTActivity[]
  onSave: (updated: VVTActivity) => void
  onBack: () => void
  onSelectActivity: (id: string) => void
}) {
  const [local, setLocal] = useState<VVTActivity | null>(null)
  const [showAdvanced, setShowAdvanced] = useState(false)

  useEffect(() => {
    setLocal(activity ? { ...activity } : null)
  }, [activity])

  if (!local) {
    return (
      <div className="space-y-4">
        <div className="bg-white rounded-xl border border-gray-200 p-8 text-center">
          <h3 className="text-lg font-semibold text-gray-900 mb-2">Keine Verarbeitung ausgewaehlt</h3>
          <p className="text-gray-500 mb-4">Waehlen Sie eine Verarbeitung aus dem Verzeichnis oder erstellen Sie eine neue.</p>
          <button onClick={onBack} className="px-4 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700">
            Zum Verzeichnis
          </button>
        </div>
        {activities.length > 0 && (
          <div className="bg-white rounded-xl border border-gray-200 p-4">
            <h4 className="font-medium text-gray-700 mb-3">Verarbeitungen zum Bearbeiten:</h4>
            <div className="space-y-1">
              {activities.map(a => (
                <button
                  key={a.id}
                  onClick={() => onSelectActivity(a.id)}
                  className="w-full text-left px-3 py-2 rounded-lg hover:bg-purple-50 text-sm flex items-center justify-between"
                >
                  <span><span className="font-mono text-gray-400 mr-2">{a.vvtId}</span>{a.name || '(Ohne Namen)'}</span>
                  <span className={`px-2 py-0.5 text-xs rounded-full ${STATUS_COLORS[a.status]}`}>{STATUS_LABELS[a.status]}</span>
                </button>
              ))}
            </div>
          </div>
        )}
      </div>
    )
  }

  const update = (patch: Partial<VVTActivity>) => setLocal(prev => prev ? { ...prev, ...patch } : prev)

  const handleSave = () => {
    if (local) onSave(local)
  }

  return (
    <div className="space-y-4">
      {/* Header */}
      <div className="flex items-center justify-between">
        <div className="flex items-center gap-3">
          <button onClick={onBack} className="p-2 hover:bg-gray-100 rounded-lg">
            <svg className="w-5 h-5 text-gray-500" fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10 19l-7-7m0 0l7-7m-7 7h18" />
            </svg>
          </button>
          <div>
            <span className="text-sm font-mono text-gray-400">{local.vvtId}</span>
            <h2 className="text-lg font-bold text-gray-900">{local.name || 'Neue Verarbeitung'}</h2>
          </div>
        </div>
        <div className="flex items-center gap-2">
          <select
            value={local.status}
            onChange={(e) => update({ status: e.target.value as VVTActivity['status'] })}
            className="px-3 py-1.5 border border-gray-300 rounded-lg text-sm"
          >
            <option value="DRAFT">Entwurf</option>
            <option value="REVIEW">In Pruefung</option>
            <option value="APPROVED">Genehmigt</option>
            <option value="ARCHIVED">Archiviert</option>
          </select>
          <button onClick={handleSave} className="px-4 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700 text-sm">
            Speichern
          </button>
        </div>
      </div>

      {/* Form */}
      <div className="bg-white rounded-xl border border-gray-200 divide-y divide-gray-100">
        {/* Bezeichnung + Beschreibung */}
        <FormSection title="Grunddaten">
          <FormField label="Bezeichnung *">
            <input type="text" value={local.name} onChange={(e) => update({ name: e.target.value })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent"
              placeholder="z.B. Mitarbeiterverwaltung" />
          </FormField>
          <FormField label="Beschreibung">
            <textarea value={local.description} onChange={(e) => update({ description: e.target.value })}
              rows={2} className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent"
              placeholder="Kurze Beschreibung der Verarbeitung" />
          </FormField>
          <div className="grid grid-cols-2 gap-4">
            <FormField label="Verantwortlich">
              <input type="text" value={local.responsible} onChange={(e) => update({ responsible: e.target.value })}
                className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="z.B. HR-Abteilung" />
            </FormField>
            <FormField label="Geschaeftsbereich">
              <select value={local.businessFunction} onChange={(e) => update({ businessFunction: e.target.value as BusinessFunction })}
                className="w-full px-3 py-2 border border-gray-300 rounded-lg">
                {Object.entries(BUSINESS_FUNCTION_LABELS).map(([k, v]) => (
                  <option key={k} value={k}>{v}</option>
                ))}
              </select>
            </FormField>
          </div>
        </FormSection>

        {/* Zwecke */}
        <FormSection title="Zwecke der Verarbeitung *">
          <MultiTextInput
            values={local.purposes}
            onChange={(purposes) => update({ purposes })}
            placeholder="Zweck eingeben und Enter druecken"
          />
        </FormSection>

        {/* Rechtsgrundlagen */}
        <FormSection title="Rechtsgrundlagen *">
          <div className="space-y-2">
            {local.legalBases.map((lb, i) => (
              <div key={i} className="flex items-center gap-2">
                <select
                  value={lb.type}
                  onChange={(e) => {
                    const copy = [...local.legalBases]
                    copy[i] = { ...copy[i], type: e.target.value }
                    update({ legalBases: copy })
                  }}
                  className="flex-1 px-3 py-2 border border-gray-300 rounded-lg text-sm"
                >
                  <option value="">-- Rechtsgrundlage waehlen --</option>
                  {Object.entries(LEGAL_BASIS_META).map(([k, v]) => (
                    <option key={k} value={k}>{v.label.de} ({v.article})</option>
                  ))}
                </select>
                <input
                  type="text"
                  value={lb.reference || ''}
                  onChange={(e) => {
                    const copy = [...local.legalBases]
                    copy[i] = { ...copy[i], reference: e.target.value }
                    update({ legalBases: copy })
                  }}
                  className="w-48 px-3 py-2 border border-gray-300 rounded-lg text-sm"
                  placeholder="Referenz"
                />
                <button onClick={() => update({ legalBases: local.legalBases.filter((_, j) => j !== i) })}
                  className="p-2 text-gray-400 hover:text-red-500">
                  <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
                  </svg>
                </button>
              </div>
            ))}
            <button onClick={() => update({ legalBases: [...local.legalBases, { type: '', description: '', reference: '' }] })}
              className="text-sm text-purple-600 hover:text-purple-700">
              + Rechtsgrundlage hinzufuegen
            </button>
          </div>
        </FormSection>

        {/* Betroffenenkategorien */}
        <FormSection title="Betroffenenkategorien *">
          <CheckboxGrid
            options={Object.entries(DATA_SUBJECT_CATEGORY_META).map(([k, v]) => ({ value: k, label: v.de }))}
            selected={local.dataSubjectCategories}
            onChange={(dataSubjectCategories) => update({ dataSubjectCategories })}
          />
        </FormSection>

        {/* Datenkategorien */}
        <FormSection title="Datenkategorien *">
          <CheckboxGrid
            options={Object.entries(PERSONAL_DATA_CATEGORY_META).map(([k, v]) => ({
              value: k,
              label: v.label.de,
              highlight: v.isSpecial,
            }))}
            selected={local.personalDataCategories}
            onChange={(personalDataCategories) => update({ personalDataCategories })}
          />
          {local.personalDataCategories.some(c => ART9_CATEGORIES.includes(c)) && (
            <div className="mt-2 p-3 bg-red-50 border border-red-200 rounded-lg text-sm text-red-700">
              <strong>Hinweis:</strong> Sie verarbeiten besondere Datenkategorien nach Art. 9 DSGVO. Stellen Sie sicher, dass eine Art.-9-Rechtsgrundlage vorliegt.
            </div>
          )}
        </FormSection>

        {/* Empfaenger */}
        <FormSection title="Empfaengerkategorien">
          <div className="space-y-2">
            {local.recipientCategories.map((rc, i) => (
              <div key={i} className="flex items-center gap-2">
                <select
                  value={rc.type}
                  onChange={(e) => {
                    const copy = [...local.recipientCategories]
                    copy[i] = { ...copy[i], type: e.target.value }
                    update({ recipientCategories: copy })
                  }}
                  className="w-40 px-3 py-2 border border-gray-300 rounded-lg text-sm"
                >
                  <option value="INTERNAL">Intern</option>
                  <option value="PROCESSOR">Auftragsverarbeiter</option>
                  <option value="CONTROLLER">Verantwortlicher</option>
                  <option value="AUTHORITY">Behoerde</option>
                  <option value="GROUP_COMPANY">Konzern</option>
                  <option value="OTHER">Sonstige</option>
                </select>
                <input type="text" value={rc.name}
                  onChange={(e) => {
                    const copy = [...local.recipientCategories]
                    copy[i] = { ...copy[i], name: e.target.value }
                    update({ recipientCategories: copy })
                  }}
                  className="flex-1 px-3 py-2 border border-gray-300 rounded-lg text-sm" placeholder="Name des Empfaengers" />
                <button onClick={() => update({ recipientCategories: local.recipientCategories.filter((_, j) => j !== i) })}
                  className="p-2 text-gray-400 hover:text-red-500">
                  <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
                  </svg>
                </button>
              </div>
            ))}
            <button onClick={() => update({ recipientCategories: [...local.recipientCategories, { type: 'INTERNAL', name: '' }] })}
              className="text-sm text-purple-600 hover:text-purple-700">
              + Empfaenger hinzufuegen
            </button>
          </div>
        </FormSection>

        {/* Drittlandtransfers */}
        <FormSection title="Drittlandtransfers">
          <div className="space-y-2">
            {local.thirdCountryTransfers.map((tc, i) => (
              <div key={i} className="flex items-center gap-2 flex-wrap">
                <input type="text" value={tc.country}
                  onChange={(e) => {
                    const copy = [...local.thirdCountryTransfers]
                    copy[i] = { ...copy[i], country: e.target.value }
                    update({ thirdCountryTransfers: copy })
                  }}
                  className="w-20 px-3 py-2 border border-gray-300 rounded-lg text-sm" placeholder="Land" />
                <input type="text" value={tc.recipient}
                  onChange={(e) => {
                    const copy = [...local.thirdCountryTransfers]
                    copy[i] = { ...copy[i], recipient: e.target.value }
                    update({ thirdCountryTransfers: copy })
                  }}
                  className="flex-1 px-3 py-2 border border-gray-300 rounded-lg text-sm" placeholder="Empfaenger" />
                <select value={tc.transferMechanism}
                  onChange={(e) => {
                    const copy = [...local.thirdCountryTransfers]
                    copy[i] = { ...copy[i], transferMechanism: e.target.value }
                    update({ thirdCountryTransfers: copy })
                  }}
                  className="w-56 px-3 py-2 border border-gray-300 rounded-lg text-sm">
                  <option value="">-- Mechanismus --</option>
                  {Object.entries(TRANSFER_MECHANISM_META).map(([k, v]) => (
                    <option key={k} value={k}>{v.de}</option>
                  ))}
                </select>
                <button onClick={() => update({ thirdCountryTransfers: local.thirdCountryTransfers.filter((_, j) => j !== i) })}
                  className="p-2 text-gray-400 hover:text-red-500">
                  <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
                  </svg>
                </button>
              </div>
            ))}
            <button onClick={() => update({ thirdCountryTransfers: [...local.thirdCountryTransfers, { country: '', recipient: '', transferMechanism: '' }] })}
              className="text-sm text-purple-600 hover:text-purple-700">
              + Drittlandtransfer hinzufuegen
            </button>
          </div>
        </FormSection>

        {/* Aufbewahrungsfristen */}
        <FormSection title="Aufbewahrungsfristen *">
          <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
            <FormField label="Dauer">
              <div className="flex gap-2">
                <input type="number" value={local.retentionPeriod.duration || ''}
                  onChange={(e) => update({ retentionPeriod: { ...local.retentionPeriod, duration: parseInt(e.target.value) || undefined } })}
                  className="w-20 px-3 py-2 border border-gray-300 rounded-lg" placeholder="z.B. 10" />
                <select value={local.retentionPeriod.durationUnit || 'YEARS'}
                  onChange={(e) => update({ retentionPeriod: { ...local.retentionPeriod, durationUnit: e.target.value } })}
                  className="px-3 py-2 border border-gray-300 rounded-lg">
                  <option value="DAYS">Tage</option>
                  <option value="MONTHS">Monate</option>
                  <option value="YEARS">Jahre</option>
                </select>
              </div>
            </FormField>
            <FormField label="Rechtsgrundlage">
              <input type="text" value={local.retentionPeriod.legalBasis || ''}
                onChange={(e) => update({ retentionPeriod: { ...local.retentionPeriod, legalBasis: e.target.value } })}
                className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="z.B. HGB § 257" />
            </FormField>
            <FormField label="Loeschverfahren">
              <input type="text" value={local.retentionPeriod.deletionProcedure || ''}
                onChange={(e) => update({ retentionPeriod: { ...local.retentionPeriod, deletionProcedure: e.target.value } })}
                className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="z.B. Automatische Loeschung" />
            </FormField>
          </div>
          <FormField label="Beschreibung">
            <input type="text" value={local.retentionPeriod.description}
              onChange={(e) => update({ retentionPeriod: { ...local.retentionPeriod, description: e.target.value } })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="Freitextbeschreibung der Aufbewahrungsfrist" />
          </FormField>
        </FormSection>

        {/* TOM-Beschreibung */}
        <FormSection title="TOM-Beschreibung (Art. 32)">
          <textarea value={local.tomDescription} onChange={(e) => update({ tomDescription: e.target.value })}
            rows={3} className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent"
            placeholder="Beschreiben Sie die technischen und organisatorischen Massnahmen zum Schutz der Daten" />
        </FormSection>

        {/* Advanced (collapsible) */}
        <div className="p-4">
          <button
            onClick={() => setShowAdvanced(!showAdvanced)}
            className="flex items-center gap-2 text-sm text-gray-600 hover:text-gray-900"
          >
            <svg className={`w-4 h-4 transition-transform ${showAdvanced ? 'rotate-90' : ''}`} fill="none" stroke="currentColor" viewBox="0 0 24 24">
              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
            </svg>
            Generator-Felder (Schutzniveau, Systeme, DSFA)
          </button>

          {showAdvanced && (
            <div className="mt-4 space-y-4">
              <div className="grid grid-cols-3 gap-4">
                <FormField label="Schutzniveau">
                  <select value={local.protectionLevel} onChange={(e) => update({ protectionLevel: e.target.value as VVTActivity['protectionLevel'] })}
                    className="w-full px-3 py-2 border border-gray-300 rounded-lg">
                    {Object.entries(PROTECTION_LEVEL_LABELS).map(([k, v]) => (
                      <option key={k} value={k}>{v}</option>
                    ))}
                  </select>
                </FormField>
                <FormField label="Deployment">
                  <select value={local.deploymentModel} onChange={(e) => update({ deploymentModel: e.target.value as VVTActivity['deploymentModel'] })}
                    className="w-full px-3 py-2 border border-gray-300 rounded-lg">
                    {Object.entries(DEPLOYMENT_LABELS).map(([k, v]) => (
                      <option key={k} value={k}>{v}</option>
                    ))}
                  </select>
                </FormField>
                <FormField label="DSFA erforderlich">
                  <label className="flex items-center gap-2 mt-2">
                    <input type="checkbox" checked={local.dpiaRequired}
                      onChange={(e) => update({ dpiaRequired: e.target.checked })}
                      className="w-4 h-4 text-purple-600 rounded" />
                    <span className="text-sm text-gray-700">Ja, DSFA nach Art. 35 DSGVO erforderlich</span>
                  </label>
                </FormField>
              </div>
            </div>
          )}
        </div>
      </div>

      {/* Save button at bottom */}
      <div className="flex items-center justify-end gap-3">
        <button onClick={onBack} className="px-4 py-2 text-gray-600 hover:bg-gray-100 rounded-lg">
          Zurueck zum Verzeichnis
        </button>
        <button onClick={handleSave} className="px-6 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700">
          Speichern
        </button>
      </div>
    </div>
  )
}

// =============================================================================
// TAB 3: GENERATOR
// =============================================================================

function TabGenerator({
  step, setStep, answers, setAnswers, preview, setPreview, onAdoptAll,
}: {
  step: number
  setStep: (s: number) => void
  answers: ProfilingAnswers
  setAnswers: (a: ProfilingAnswers) => void
  preview: VVTActivity[] | null
  setPreview: (p: VVTActivity[] | null) => void
  onAdoptAll: (activities: VVTActivity[]) => void
}) {
  const questions = getQuestionsForStep(step)
  const totalSteps = PROFILING_STEPS.length
  const currentStepInfo = PROFILING_STEPS.find(s => s.step === step)
  const totalProgress = getTotalProgress(answers)

  const handleGenerate = () => {
    const result = generateActivities(answers)
    setPreview(result.generatedActivities)
  }

  // Preview mode
  if (preview) {
    return (
      <div className="space-y-4">
        <div className="bg-white rounded-xl border border-gray-200 p-6">
          <h3 className="text-lg font-semibold text-gray-900 mb-2">Generierte Verarbeitungen</h3>
          <p className="text-sm text-gray-500 mb-4">
            Basierend auf Ihren Antworten wurden {preview.length} Verarbeitungstaetigkeiten generiert.
            Sie koennen einzelne Eintraege abwaehlen, bevor Sie diese uebernehmen.
          </p>
          <div className="space-y-2">
            {preview.map((a, i) => (
              <div key={a.id} className="flex items-center gap-3 p-3 bg-gray-50 rounded-lg">
                <input type="checkbox" defaultChecked className="w-4 h-4 text-purple-600 rounded"
                  onChange={(e) => {
                    if (!e.target.checked) {
                      setPreview(preview.filter((_, j) => j !== i))
                    }
                  }} />
                <div className="flex-1 min-w-0">
                  <div className="flex items-center gap-2">
                    <span className="font-mono text-xs text-gray-400">{a.vvtId}</span>
                    <span className="text-sm font-medium text-gray-900">{a.name}</span>
                    <span className="px-2 py-0.5 text-xs bg-blue-100 text-blue-700 rounded-full">{BUSINESS_FUNCTION_LABELS[a.businessFunction]}</span>
                  </div>
                  <p className="text-xs text-gray-500 truncate">{a.description}</p>
                </div>
              </div>
            ))}
          </div>
        </div>
        <div className="flex items-center justify-between">
          <button onClick={() => setPreview(null)} className="px-4 py-2 text-gray-600 hover:bg-gray-100 rounded-lg">
            Zurueck zum Fragebogen
          </button>
          <button onClick={() => onAdoptAll(preview)} className="px-6 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700">
            Alle {preview.length} uebernehmen
          </button>
        </div>
      </div>
    )
  }

  return (
    <div className="space-y-4">
      {/* Progress Bar */}
      <div className="bg-white rounded-xl border border-gray-200 p-4">
        <div className="flex items-center justify-between mb-2">
          <span className="text-sm font-medium text-gray-700">Fortschritt: {totalProgress}%</span>
          <span className="text-sm text-gray-500">Schritt {step} von {totalSteps}</span>
        </div>
        <div className="w-full h-2 bg-gray-200 rounded-full overflow-hidden">
          <div className="h-full bg-purple-600 rounded-full transition-all" style={{ width: `${(step / totalSteps) * 100}%` }} />
        </div>
        <div className="flex items-center gap-1 mt-3">
          {PROFILING_STEPS.map(s => (
            <button
              key={s.step}
              onClick={() => setStep(s.step)}
              className={`flex-1 h-1.5 rounded-full transition-colors ${
                s.step === step ? 'bg-purple-600' : s.step < step ? 'bg-purple-300' : 'bg-gray-200'
              }`}
            />
          ))}
        </div>
      </div>

      {/* Step Info */}
      <div className="bg-white rounded-xl border border-gray-200 p-6">
        <h3 className="text-lg font-semibold text-gray-900">{currentStepInfo?.title}</h3>
        <p className="text-sm text-gray-500 mt-1">{currentStepInfo?.description}</p>

        <div className="mt-6 space-y-6">
          {questions.map(q => (
            <div key={q.id}>
              <label className="block text-sm font-medium text-gray-700 mb-2">{q.question}</label>
              {q.helpText && <p className="text-xs text-gray-400 mb-2">{q.helpText}</p>}

              {q.type === 'boolean' && (
                <div className="flex items-center gap-4">
                  <label className="flex items-center gap-2 cursor-pointer">
                    <input type="radio" name={q.id} checked={answers[q.id] === true}
                      onChange={() => setAnswers({ ...answers, [q.id]: true })}
                      className="w-4 h-4 text-purple-600" />
                    <span className="text-sm">Ja</span>
                  </label>
                  <label className="flex items-center gap-2 cursor-pointer">
                    <input type="radio" name={q.id} checked={answers[q.id] === false}
                      onChange={() => setAnswers({ ...answers, [q.id]: false })}
                      className="w-4 h-4 text-purple-600" />
                    <span className="text-sm">Nein</span>
                  </label>
                </div>
              )}

              {q.type === 'single_choice' && q.options && (
                <div className="grid grid-cols-2 md:grid-cols-3 gap-2">
                  {q.options.map(opt => (
                    <label
                      key={opt.value}
                      className={`flex items-center gap-2 p-3 border rounded-lg cursor-pointer transition-colors ${
                        answers[q.id] === opt.value ? 'border-purple-500 bg-purple-50' : 'border-gray-200 hover:border-gray-300'
                      }`}
                    >
                      <input type="radio" name={q.id} value={opt.value}
                        checked={answers[q.id] === opt.value}
                        onChange={() => setAnswers({ ...answers, [q.id]: opt.value })}
                        className="w-4 h-4 text-purple-600" />
                      <span className="text-sm">{opt.label}</span>
                    </label>
                  ))}
                </div>
              )}

              {q.type === 'number' && (
                <input type="number" value={typeof answers[q.id] === 'number' ? answers[q.id] as number : ''}
                  onChange={(e) => setAnswers({ ...answers, [q.id]: parseInt(e.target.value) || 0 })}
                  className="w-40 px-3 py-2 border border-gray-300 rounded-lg"
                  placeholder="Anzahl" />
              )}

              {q.type === 'text' && (
                <input type="text" value={(answers[q.id] as string) || ''}
                  onChange={(e) => setAnswers({ ...answers, [q.id]: e.target.value })}
                  className="w-full px-3 py-2 border border-gray-300 rounded-lg" />
              )}
            </div>
          ))}
        </div>
      </div>

      {/* Navigation */}
      <div className="flex items-center justify-between">
        <button
          onClick={() => setStep(Math.max(1, step - 1))}
          disabled={step === 1}
          className="px-4 py-2 text-gray-600 hover:bg-gray-100 rounded-lg disabled:opacity-50 disabled:cursor-not-allowed"
        >
          Zurueck
        </button>
        <div className="flex items-center gap-3">
          {step < totalSteps ? (
            <button onClick={() => setStep(step + 1)} className="px-6 py-2 bg-purple-600 text-white rounded-lg hover:bg-purple-700">
              Weiter
            </button>
          ) : (
            <button onClick={handleGenerate} className="px-6 py-2 bg-green-600 text-white rounded-lg hover:bg-green-700">
              Verarbeitungen generieren
            </button>
          )}
        </div>
      </div>
    </div>
  )
}

// =============================================================================
// TAB 4: EXPORT & COMPLIANCE
// =============================================================================

function TabExport({
  activities, orgHeader, onUpdateOrgHeader,
}: {
  activities: VVTActivity[]
  orgHeader: VVTOrganizationHeader
  onUpdateOrgHeader: (org: VVTOrganizationHeader) => void
}) {
  // Compliance check
  const issues: { activityId: string; vvtId: string; name: string; issues: string[] }[] = []
  for (const a of activities) {
    const actIssues: string[] = []
    if (!a.name) actIssues.push('Bezeichnung fehlt')
    if (a.purposes.length === 0) actIssues.push('Zweck(e) fehlen')
    if (a.legalBases.length === 0) actIssues.push('Rechtsgrundlage fehlt')
    if (a.dataSubjectCategories.length === 0) actIssues.push('Betroffenenkategorien fehlen')
    if (a.personalDataCategories.length === 0) actIssues.push('Datenkategorien fehlen')
    if (!a.retentionPeriod.description) actIssues.push('Aufbewahrungsfrist fehlt')
    if (!a.tomDescription && a.structuredToms.accessControl.length === 0) actIssues.push('TOM-Beschreibung fehlt')

    // Art. 9 without Art. 9 legal basis
    const hasArt9Data = a.personalDataCategories.some(c => ART9_CATEGORIES.includes(c))
    const hasArt9Basis = a.legalBases.some(lb => lb.type.startsWith('ART9_'))
    if (hasArt9Data && !hasArt9Basis) actIssues.push('Art.-9-Daten ohne Art.-9-Rechtsgrundlage')

    // Third country without mechanism
    for (const tc of a.thirdCountryTransfers) {
      if (!tc.transferMechanism) actIssues.push(`Drittland ${tc.country}: Transfer-Mechanismus fehlt`)
    }

    if (actIssues.length > 0) {
      issues.push({ activityId: a.id, vvtId: a.vvtId, name: a.name || '(Ohne Namen)', issues: actIssues })
    }
  }

  const compliantCount = activities.length - issues.length
  const compliancePercent = activities.length > 0 ? Math.round((compliantCount / activities.length) * 100) : 0

  const handleExportJSON = () => {
    const data = {
      version: '1.0',
      exportDate: new Date().toISOString(),
      organization: orgHeader,
      activities: activities,
    }
    const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' })
    const url = URL.createObjectURL(blob)
    const a = document.createElement('a')
    a.href = url
    a.download = `vvt-export-${new Date().toISOString().split('T')[0]}.json`
    a.click()
    URL.revokeObjectURL(url)
  }

  const handleExportCSV = () => {
    const headers = ['VVT-ID', 'Name', 'Beschreibung', 'Zwecke', 'Rechtsgrundlagen', 'Betroffene', 'Datenkategorien', 'Empfaenger', 'Drittlandtransfers', 'Aufbewahrungsfrist', 'TOM', 'Status', 'Verantwortlich']
    const rows = activities.map(a => [
      a.vvtId,
      a.name,
      a.description,
      a.purposes.join('; '),
      a.legalBases.map(lb => `${lb.type}${lb.reference ? ' (' + lb.reference + ')' : ''}`).join('; '),
      a.dataSubjectCategories.map(c => DATA_SUBJECT_CATEGORY_META[c as keyof typeof DATA_SUBJECT_CATEGORY_META]?.de || c).join('; '),
      a.personalDataCategories.map(c => PERSONAL_DATA_CATEGORY_META[c as keyof typeof PERSONAL_DATA_CATEGORY_META]?.label?.de || c).join('; '),
      a.recipientCategories.map(r => `${r.name} (${r.type})`).join('; '),
      a.thirdCountryTransfers.map(t => `${t.country}: ${t.recipient}`).join('; '),
      a.retentionPeriod.description,
      a.tomDescription,
      STATUS_LABELS[a.status],
      a.responsible,
    ])

    const csvContent = [headers, ...rows].map(row =>
      row.map(cell => `"${String(cell || '').replace(/"/g, '""')}"`).join(',')
    ).join('\n')

    const blob = new Blob(['\ufeff' + csvContent], { type: 'text/csv;charset=utf-8' })
    const url = URL.createObjectURL(blob)
    const a = document.createElement('a')
    a.href = url
    a.download = `vvt-export-${new Date().toISOString().split('T')[0]}.csv`
    a.click()
    URL.revokeObjectURL(url)
  }

  return (
    <div className="space-y-4">
      {/* Compliance Overview */}
      <div className="bg-white rounded-xl border border-gray-200 p-6">
        <h3 className="text-lg font-semibold text-gray-900 mb-4">Compliance-Check</h3>
        <div className="flex items-center gap-6 mb-4">
          <div className="flex items-center gap-3">
            <div className={`w-16 h-16 rounded-full flex items-center justify-center text-xl font-bold ${
              compliancePercent === 100 ? 'bg-green-100 text-green-700' :
              compliancePercent >= 70 ? 'bg-yellow-100 text-yellow-700' : 'bg-red-100 text-red-700'
            }`}>
              {compliancePercent}%
            </div>
            <div>
              <div className="font-medium text-gray-900">{compliantCount} von {activities.length} vollstaendig</div>
              <div className="text-sm text-gray-500">{issues.length} Eintraege mit Maengeln</div>
            </div>
          </div>
        </div>

        {issues.length > 0 && (
          <div className="space-y-2 mt-4">
            {issues.map(issue => (
              <div key={issue.activityId} className="p-3 bg-amber-50 border border-amber-200 rounded-lg">
                <div className="flex items-center gap-2 mb-1">
                  <span className="font-mono text-xs text-amber-600">{issue.vvtId}</span>
                  <span className="text-sm font-medium text-amber-800">{issue.name}</span>
                </div>
                <ul className="text-sm text-amber-700 space-y-0.5">
                  {issue.issues.map((iss, i) => (
                    <li key={i} className="flex items-center gap-1">
                      <svg className="w-3 h-3 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 9v2m0 4h.01" />
                      </svg>
                      {iss}
                    </li>
                  ))}
                </ul>
              </div>
            ))}
          </div>
        )}

        {issues.length === 0 && activities.length > 0 && (
          <div className="p-4 bg-green-50 border border-green-200 rounded-lg text-green-700 text-sm">
            Alle Verarbeitungen enthalten die erforderlichen Pflichtangaben nach Art. 30 DSGVO.
          </div>
        )}
      </div>

      {/* Organisation Header */}
      <div className="bg-white rounded-xl border border-gray-200 p-6">
        <h3 className="text-lg font-semibold text-gray-900 mb-4">VVT-Metadaten (Organisation)</h3>
        <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
          <FormField label="Organisationsname">
            <input type="text" value={orgHeader.organizationName}
              onChange={(e) => onUpdateOrgHeader({ ...orgHeader, organizationName: e.target.value })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="Firma GmbH" />
          </FormField>
          <FormField label="Branche">
            <input type="text" value={orgHeader.industry}
              onChange={(e) => onUpdateOrgHeader({ ...orgHeader, industry: e.target.value })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="z.B. IT & Software" />
          </FormField>
          <FormField label="DSB Name">
            <input type="text" value={orgHeader.dpoName}
              onChange={(e) => onUpdateOrgHeader({ ...orgHeader, dpoName: e.target.value })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="Name des Datenschutzbeauftragten" />
          </FormField>
          <FormField label="DSB Kontakt">
            <input type="text" value={orgHeader.dpoContact}
              onChange={(e) => onUpdateOrgHeader({ ...orgHeader, dpoContact: e.target.value })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg" placeholder="E-Mail oder Telefon" />
          </FormField>
          <FormField label="Mitarbeiterzahl">
            <input type="number" value={orgHeader.employeeCount || ''}
              onChange={(e) => onUpdateOrgHeader({ ...orgHeader, employeeCount: parseInt(e.target.value) || 0 })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg" />
          </FormField>
          <FormField label="Pruefintervall">
            <select value={orgHeader.reviewInterval}
              onChange={(e) => onUpdateOrgHeader({ ...orgHeader, reviewInterval: e.target.value as VVTOrganizationHeader['reviewInterval'] })}
              className="w-full px-3 py-2 border border-gray-300 rounded-lg">
              {Object.entries(REVIEW_INTERVAL_LABELS).map(([k, v]) => (
                <option key={k} value={k}>{v}</option>
              ))}
            </select>
          </FormField>
        </div>
      </div>

      {/* Export */}
      <div className="bg-white rounded-xl border border-gray-200 p-6">
        <h3 className="text-lg font-semibold text-gray-900 mb-4">Export</h3>
        <div className="flex items-center gap-3">
          <button onClick={handleExportJSON} disabled={activities.length === 0}
            className="px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed text-sm">
            JSON exportieren
          </button>
          <button onClick={handleExportCSV} disabled={activities.length === 0}
            className="px-4 py-2 bg-green-600 text-white rounded-lg hover:bg-green-700 disabled:opacity-50 disabled:cursor-not-allowed text-sm">
            CSV (Excel) exportieren
          </button>
        </div>
        <p className="text-xs text-gray-400 mt-2">
          Der Export enthaelt alle {activities.length} Verarbeitungstaetigkeiten inkl. Organisations-Metadaten.
        </p>
      </div>

      {/* Stats */}
      <div className="bg-white rounded-xl border border-gray-200 p-6">
        <h3 className="text-lg font-semibold text-gray-900 mb-4">Statistik</h3>
        <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
          <div>
            <div className="text-2xl font-bold text-gray-900">{activities.length}</div>
            <div className="text-sm text-gray-500">Verarbeitungen</div>
          </div>
          <div>
            <div className="text-2xl font-bold text-gray-900">{[...new Set(activities.map(a => a.businessFunction))].length}</div>
            <div className="text-sm text-gray-500">Geschaeftsbereiche</div>
          </div>
          <div>
            <div className="text-2xl font-bold text-gray-900">{[...new Set(activities.flatMap(a => a.dataSubjectCategories))].length}</div>
            <div className="text-sm text-gray-500">Betroffenenkategorien</div>
          </div>
          <div>
            <div className="text-2xl font-bold text-gray-900">{[...new Set(activities.flatMap(a => a.personalDataCategories))].length}</div>
            <div className="text-sm text-gray-500">Datenkategorien</div>
          </div>
        </div>
      </div>
    </div>
  )
}

// =============================================================================
// SHARED FORM COMPONENTS
// =============================================================================

function FormSection({ title, children }: { title: string; children: React.ReactNode }) {
  return (
    <div className="p-4 space-y-3">
      <h4 className="font-medium text-gray-800 text-sm">{title}</h4>
      {children}
    </div>
  )
}

function FormField({ label, children }: { label: string; children: React.ReactNode }) {
  return (
    <div>
      <label className="block text-xs text-gray-500 mb-1">{label}</label>
      {children}
    </div>
  )
}

function MultiTextInput({ values, onChange, placeholder }: { values: string[]; onChange: (v: string[]) => void; placeholder?: string }) {
  const [input, setInput] = useState('')

  const handleKeyDown = (e: React.KeyboardEvent) => {
    if (e.key === 'Enter' && input.trim()) {
      e.preventDefault()
      onChange([...values, input.trim()])
      setInput('')
    }
  }

  return (
    <div>
      <div className="flex flex-wrap gap-1 mb-2">
        {values.map((v, i) => (
          <span key={i} className="flex items-center gap-1 px-2 py-1 bg-purple-100 text-purple-700 rounded text-sm">
            {v}
            <button onClick={() => onChange(values.filter((_, j) => j !== i))} className="text-purple-400 hover:text-purple-600">
              <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
              </svg>
            </button>
          </span>
        ))}
      </div>
      <input
        type="text"
        value={input}
        onChange={(e) => setInput(e.target.value)}
        onKeyDown={handleKeyDown}
        className="w-full px-3 py-2 border border-gray-300 rounded-lg focus:ring-2 focus:ring-purple-500 focus:border-transparent"
        placeholder={placeholder}
      />
    </div>
  )
}

function CheckboxGrid({ options, selected, onChange }: {
  options: { value: string; label: string; highlight?: boolean }[]
  selected: string[]
  onChange: (v: string[]) => void
}) {
  const toggle = (value: string) => {
    if (selected.includes(value)) {
      onChange(selected.filter(v => v !== value))
    } else {
      onChange([...selected, value])
    }
  }

  return (
    <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-4 gap-1.5">
      {options.map(opt => (
        <label
          key={opt.value}
          className={`flex items-center gap-2 p-2 rounded-lg cursor-pointer text-sm transition-colors ${
            selected.includes(opt.value)
              ? opt.highlight ? 'bg-red-50 border border-red-300' : 'bg-purple-50 border border-purple-300'
              : opt.highlight ? 'bg-red-50/30 border border-gray-200' : 'border border-gray-200 hover:bg-gray-50'
          }`}
        >
          <input
            type="checkbox"
            checked={selected.includes(opt.value)}
            onChange={() => toggle(opt.value)}
            className="w-3.5 h-3.5 text-purple-600 rounded"
          />
          <span className={opt.highlight ? 'text-red-700' : 'text-gray-700'}>{opt.label}</span>
          {opt.highlight && <span className="text-xs text-red-400">Art.9</span>}
        </label>
      ))}
    </div>
  )
}
