/**
 * VVT Profiling — Generator-Fragebogen
 *
 * ~25 Fragen in 6 Schritten, die auf Basis der Antworten
 * Baseline-Verarbeitungstaetigkeiten generieren.
 */

import { VVT_BASELINE_CATALOG, templateToActivity } from './vvt-baseline-catalog'
import { generateVVTId } from './vvt-types'
import type { VVTActivity, BusinessFunction } from './vvt-types'

// =============================================================================
// TYPES
// =============================================================================

export interface ProfilingQuestion {
  id: string
  step: number
  question: string
  type: 'single_choice' | 'multi_choice' | 'number' | 'text' | 'boolean'
  options?: { value: string; label: string }[]
  helpText?: string
  triggersTemplates: string[] // Template-IDs that get activated when answered positively
}

export interface ProfilingStep {
  step: number
  title: string
  description: string
}

export interface ProfilingAnswers {
  [questionId: string]: string | string[] | number | boolean
}

export interface ProfilingResult {
  answers: ProfilingAnswers
  generatedActivities: VVTActivity[]
  coverageScore: number
  art30Abs5Exempt: boolean
}

// =============================================================================
// STEPS
// =============================================================================

export const PROFILING_STEPS: ProfilingStep[] = [
  { step: 1, title: 'Organisation', description: 'Grunddaten zu Ihrem Unternehmen' },
  { step: 2, title: 'Geschaeftsbereiche', description: 'Welche Bereiche sind aktiv?' },
  { step: 3, title: 'Systeme & Tools', description: 'Welche IT-Systeme nutzen Sie?' },
  { step: 4, title: 'Datenkategorien', description: 'Welche besonderen Daten verarbeiten Sie?' },
  { step: 5, title: 'Drittlandtransfers', description: 'Transfers ausserhalb der EU/EWR' },
  { step: 6, title: 'Besondere Verarbeitungen', description: 'KI, Scoring, Ueberwachung' },
]

// =============================================================================
// QUESTIONS
// =============================================================================

export const PROFILING_QUESTIONS: ProfilingQuestion[] = [
  // === STEP 1: Organisation ===
  {
    id: 'org_industry',
    step: 1,
    question: 'In welcher Branche ist Ihr Unternehmen taetig?',
    type: 'single_choice',
    options: [
      { value: 'it_software', label: 'IT & Software' },
      { value: 'healthcare', label: 'Gesundheitswesen' },
      { value: 'education', label: 'Bildung & Erziehung' },
      { value: 'finance', label: 'Finanzdienstleistungen' },
      { value: 'retail', label: 'Handel & E-Commerce' },
      { value: 'manufacturing', label: 'Produktion & Industrie' },
      { value: 'consulting', label: 'Beratung & Dienstleistung' },
      { value: 'public', label: 'Oeffentlicher Sektor' },
      { value: 'other', label: 'Sonstige' },
    ],
    triggersTemplates: [],
  },
  {
    id: 'org_employees',
    step: 1,
    question: 'Wie viele Mitarbeiter hat Ihr Unternehmen?',
    type: 'number',
    helpText: 'Relevant fuer Art. 30 Abs. 5 DSGVO (Ausnahme < 250 Mitarbeiter)',
    triggersTemplates: [],
  },
  {
    id: 'org_locations',
    step: 1,
    question: 'An wie vielen Standorten ist Ihr Unternehmen taetig?',
    type: 'single_choice',
    options: [
      { value: '1', label: '1 Standort' },
      { value: '2-5', label: '2-5 Standorte' },
      { value: '6-20', label: '6-20 Standorte' },
      { value: '20+', label: 'Mehr als 20 Standorte' },
    ],
    triggersTemplates: [],
  },
  {
    id: 'org_b2b_b2c',
    step: 1,
    question: 'Welches Geschaeftsmodell betreiben Sie?',
    type: 'single_choice',
    options: [
      { value: 'b2b', label: 'B2B (Geschaeftskunden)' },
      { value: 'b2c', label: 'B2C (Endkunden)' },
      { value: 'both', label: 'Beides (B2B + B2C)' },
      { value: 'b2g', label: 'B2G (Oeffentlicher Sektor)' },
    ],
    triggersTemplates: [],
  },

  // === STEP 2: Geschaeftsbereiche ===
  {
    id: 'dept_hr',
    step: 2,
    question: 'Haben Sie eine Personalabteilung / HR?',
    type: 'boolean',
    triggersTemplates: ['hr-mitarbeiterverwaltung', 'hr-gehaltsabrechnung', 'hr-zeiterfassung'],
  },
  {
    id: 'dept_recruiting',
    step: 2,
    question: 'Betreiben Sie aktives Recruiting / Bewerbermanagement?',
    type: 'boolean',
    triggersTemplates: ['hr-bewerbermanagement'],
  },
  {
    id: 'dept_finance',
    step: 2,
    question: 'Haben Sie eine Finanz-/Buchhaltungsabteilung?',
    type: 'boolean',
    triggersTemplates: ['finance-buchhaltung', 'finance-zahlungsverkehr'],
  },
  {
    id: 'dept_sales',
    step: 2,
    question: 'Haben Sie einen Vertrieb / Kundenverwaltung?',
    type: 'boolean',
    triggersTemplates: ['sales-kundenverwaltung', 'sales-vertriebssteuerung'],
  },
  {
    id: 'dept_marketing',
    step: 2,
    question: 'Betreiben Sie Marketing-Aktivitaeten?',
    type: 'boolean',
    triggersTemplates: ['marketing-social-media'],
  },
  {
    id: 'dept_support',
    step: 2,
    question: 'Haben Sie einen Kundenservice / Support?',
    type: 'boolean',
    triggersTemplates: ['support-ticketsystem'],
  },

  // === STEP 3: Systeme & Tools ===
  {
    id: 'sys_crm',
    step: 3,
    question: 'Nutzen Sie ein CRM-System (z.B. Salesforce, HubSpot, Pipedrive)?',
    type: 'boolean',
    triggersTemplates: ['sales-kundenverwaltung'],
  },
  {
    id: 'sys_website_analytics',
    step: 3,
    question: 'Nutzen Sie Website-Analytics (z.B. Matomo, Google Analytics)?',
    type: 'boolean',
    triggersTemplates: ['marketing-website-analytics'],
  },
  {
    id: 'sys_newsletter',
    step: 3,
    question: 'Versenden Sie Newsletter (z.B. Mailchimp, CleverReach)?',
    type: 'boolean',
    triggersTemplates: ['marketing-newsletter'],
  },
  {
    id: 'sys_video',
    step: 3,
    question: 'Nutzen Sie Videokonferenz-Tools (z.B. Zoom, Teams, Jitsi)?',
    type: 'boolean',
    triggersTemplates: ['other-videokonferenz'],
  },
  {
    id: 'sys_erp',
    step: 3,
    question: 'Nutzen Sie ein ERP-System?',
    type: 'boolean',
    helpText: 'z.B. SAP, ERPNext, Microsoft Dynamics',
    triggersTemplates: ['finance-buchhaltung'],
  },
  {
    id: 'sys_visitor',
    step: 3,
    question: 'Haben Sie ein Besuchermanagement-System?',
    type: 'boolean',
    triggersTemplates: ['other-besuchermanagement'],
  },

  // === STEP 4: Datenkategorien ===
  {
    id: 'data_health',
    step: 4,
    question: 'Verarbeiten Sie Gesundheitsdaten (Art. 9 DSGVO)?',
    type: 'boolean',
    helpText: 'z.B. Krankmeldungen, Arbeitsmedizin, Gesundheitsversorgung',
    triggersTemplates: [],
  },
  {
    id: 'data_minors',
    step: 4,
    question: 'Verarbeiten Sie Daten von Minderjaehrigen?',
    type: 'boolean',
    helpText: 'z.B. Schueler, Kinder unter 16 Jahren',
    triggersTemplates: [],
  },
  {
    id: 'data_biometric',
    step: 4,
    question: 'Verarbeiten Sie biometrische Daten zur Identifizierung?',
    type: 'boolean',
    helpText: 'z.B. Fingerabdruck, Gesichtserkennung, Stimmerkennung',
    triggersTemplates: [],
  },
  {
    id: 'data_criminal',
    step: 4,
    question: 'Verarbeiten Sie Daten ueber strafrechtliche Verurteilungen (Art. 10 DSGVO)?',
    type: 'boolean',
    helpText: 'z.B. Fuehrungszeugnisse',
    triggersTemplates: [],
  },

  // === STEP 5: Drittlandtransfers ===
  {
    id: 'transfer_cloud_us',
    step: 5,
    question: 'Nutzen Sie Cloud-Dienste mit Sitz in den USA?',
    type: 'boolean',
    helpText: 'z.B. AWS, Azure, Google Cloud, Microsoft 365',
    triggersTemplates: [],
  },
  {
    id: 'transfer_support_non_eu',
    step: 5,
    question: 'Haben Sie Support-Mitarbeiter oder Dienstleister ausserhalb der EU?',
    type: 'boolean',
    triggersTemplates: [],
  },
  {
    id: 'transfer_subprocessor',
    step: 5,
    question: 'Nutzen Sie Auftragsverarbeiter mit Unteraufragnehmern in Drittlaendern?',
    type: 'boolean',
    triggersTemplates: [],
  },

  // === STEP 6: Besondere Verarbeitungen ===
  {
    id: 'special_ai',
    step: 6,
    question: 'Setzen Sie KI oder automatisierte Entscheidungsfindung ein?',
    type: 'boolean',
    helpText: 'z.B. Chatbots, Scoring, Profiling, automatische Bewertungen',
    triggersTemplates: [],
  },
  {
    id: 'special_video_surveillance',
    step: 6,
    question: 'Betreiben Sie Videoueberwachung?',
    type: 'boolean',
    triggersTemplates: [],
  },
  {
    id: 'special_tracking',
    step: 6,
    question: 'Betreiben Sie umfangreiches Nutzer-Tracking oder Profiling?',
    type: 'boolean',
    helpText: 'z.B. Verhaltensprofiling, Cross-Device-Tracking',
    triggersTemplates: [],
  },
]

// =============================================================================
// GENERATOR LOGIC
// =============================================================================

export function generateActivities(answers: ProfilingAnswers): ProfilingResult {
  // Collect all triggered template IDs
  const triggeredIds = new Set<string>()

  for (const question of PROFILING_QUESTIONS) {
    const answer = answers[question.id]
    if (!answer) continue

    // Boolean questions: if true, trigger templates
    if (question.type === 'boolean' && answer === true) {
      question.triggersTemplates.forEach(id => triggeredIds.add(id))
    }
  }

  // Always add IT baseline templates (every company needs these)
  triggeredIds.add('it-systemadministration')
  triggeredIds.add('it-backup')
  triggeredIds.add('it-logging')
  triggeredIds.add('it-iam')

  // Generate activities from triggered templates
  const existingIds: string[] = []
  const activities: VVTActivity[] = []

  for (const templateId of triggeredIds) {
    const template = VVT_BASELINE_CATALOG.find(t => t.templateId === templateId)
    if (!template) continue

    const vvtId = generateVVTId(existingIds)
    existingIds.push(vvtId)

    const activity = templateToActivity(template, vvtId)

    // Enrich with profiling answers
    enrichActivityFromAnswers(activity, answers)

    activities.push(activity)
  }

  // Calculate coverage score
  const totalFields = activities.length * 12 // 12 key fields per activity
  let filledFields = 0
  for (const a of activities) {
    if (a.name) filledFields++
    if (a.description) filledFields++
    if (a.purposes.length > 0) filledFields++
    if (a.legalBases.length > 0) filledFields++
    if (a.dataSubjectCategories.length > 0) filledFields++
    if (a.personalDataCategories.length > 0) filledFields++
    if (a.recipientCategories.length > 0) filledFields++
    if (a.retentionPeriod.description) filledFields++
    if (a.tomDescription) filledFields++
    if (a.businessFunction !== 'other') filledFields++
    if (a.structuredToms.accessControl.length > 0) filledFields++
    if (a.responsible || a.owner) filledFields++
  }

  const coverageScore = totalFields > 0 ? Math.round((filledFields / totalFields) * 100) : 0

  // Art. 30 Abs. 5 check
  const employeeCount = typeof answers.org_employees === 'number' ? answers.org_employees : 0
  const hasSpecialCategories = answers.data_health === true || answers.data_biometric === true || answers.data_criminal === true
  const art30Abs5Exempt = employeeCount < 250 && !hasSpecialCategories

  return {
    answers,
    generatedActivities: activities,
    coverageScore,
    art30Abs5Exempt,
  }
}

// =============================================================================
// ENRICHMENT
// =============================================================================

function enrichActivityFromAnswers(activity: VVTActivity, answers: ProfilingAnswers): void {
  // Add third-country transfers if US cloud is used
  if (answers.transfer_cloud_us === true) {
    activity.thirdCountryTransfers.push({
      country: 'US',
      recipient: 'Cloud-Dienstleister (USA)',
      transferMechanism: 'SCC_PROCESSOR',
      additionalMeasures: ['Verschluesselung at-rest', 'Transfer Impact Assessment'],
    })
  }

  // Add special data categories if applicable
  if (answers.data_health === true) {
    if (!activity.personalDataCategories.includes('HEALTH_DATA')) {
      // Only add to HR activities
      if (activity.businessFunction === 'hr') {
        activity.personalDataCategories.push('HEALTH_DATA')
        // Ensure Art. 9 legal basis
        if (!activity.legalBases.some(lb => lb.type.startsWith('ART9_'))) {
          activity.legalBases.push({
            type: 'ART9_EMPLOYMENT',
            description: 'Arbeitsrechtliche Verarbeitung',
            reference: 'Art. 9 Abs. 2 lit. b DSGVO',
          })
        }
      }
    }
  }

  if (answers.data_minors === true) {
    if (!activity.dataSubjectCategories.includes('MINORS')) {
      // Add to relevant activities (education, app users)
      if (activity.businessFunction === 'support' || activity.businessFunction === 'product_engineering') {
        activity.dataSubjectCategories.push('MINORS')
      }
    }
  }

  // Set DPIA required for special processing
  if (answers.special_ai === true || answers.special_video_surveillance === true || answers.special_tracking === true) {
    if (answers.special_ai === true && activity.businessFunction === 'product_engineering') {
      activity.dpiaRequired = true
    }
  }
}

// =============================================================================
// HELPERS
// =============================================================================

export function getQuestionsForStep(step: number): ProfilingQuestion[] {
  return PROFILING_QUESTIONS.filter(q => q.step === step)
}

export function getStepProgress(answers: ProfilingAnswers, step: number): number {
  const questions = getQuestionsForStep(step)
  if (questions.length === 0) return 100

  const answered = questions.filter(q => {
    const a = answers[q.id]
    return a !== undefined && a !== null && a !== ''
  }).length

  return Math.round((answered / questions.length) * 100)
}

export function getTotalProgress(answers: ProfilingAnswers): number {
  const total = PROFILING_QUESTIONS.length
  if (total === 0) return 100

  const answered = PROFILING_QUESTIONS.filter(q => {
    const a = answers[q.id]
    return a !== undefined && a !== null && a !== ''
  }).length

  return Math.round((answered / total) * 100)
}

// =============================================================================
// COMPLIANCE SCOPE INTEGRATION
// =============================================================================

/**
 * Prefill VVT profiling answers from Compliance Scope Engine answers.
 * The Scope Engine acts as the "Single Source of Truth" for organizational questions.
 * Redundant questions are auto-filled with a "prefilled" marker.
 */
export function prefillFromScopeAnswers(
  scopeAnswers: import('./compliance-scope-types').ScopeProfilingAnswer[]
): ProfilingAnswers {
  const { exportToVVTAnswers } = require('./compliance-scope-profiling')
  const exported = exportToVVTAnswers(scopeAnswers) as Record<string, unknown>
  const prefilled: ProfilingAnswers = {}

  for (const [key, value] of Object.entries(exported)) {
    if (value !== undefined && value !== null) {
      prefilled[key] = value as string | string[] | number | boolean
    }
  }

  return prefilled
}

/**
 * Get the list of VVT question IDs that are prefilled from Scope answers.
 * These questions should show "Aus Scope-Analyse uebernommen" hint.
 */
export const SCOPE_PREFILLED_VVT_QUESTIONS = [
  'org_industry',
  'org_employees',
  'org_b2b_b2c',
  'dept_hr',
  'dept_finance',
  'dept_marketing',
  'data_health',
  'data_minors',
  'data_biometric',
  'data_criminal',
  'special_ai',
  'special_video_surveillance',
  'special_tracking',
  'transfer_cloud_us',
  'transfer_subprocessor',
  'transfer_support_non_eu',
]