/**
 * Allowed Facts v2 Adapter — Baut AllowedFacts aus DraftContext
 *
 * Die Haupt-AllowedFacts Datei (allowed-facts.ts) erwartet SDKState,
 * aber in der Draft API Route haben wir nur DraftContext.
 * Dieser Adapter ueberbrueckt die Luecke.
 *
 * Re-exportiert auch die Serialisierungs-/Validierungsfunktionen.
 */

import type { AllowedFacts, FactPolicy } from './allowed-facts'
import {
  DEFAULT_FACT_POLICY,
  allowedFactsToPromptString,
  disallowedTopicsToPromptString,
  checkForDisallowedContent,
} from './allowed-facts'
import type { NarrativeTags } from './narrative-tags'
import type { DraftContext } from './types'

// Re-exports
export { allowedFactsToPromptString, disallowedTopicsToPromptString, checkForDisallowedContent }

/**
 * Baut AllowedFacts aus einem DraftContext (API Route Kontext).
 * Der DraftContext hat bereits projizierte Firmendaten.
 */
export function buildAllowedFactsFromDraftContext(
  context: DraftContext,
  narrativeTags: NarrativeTags
): AllowedFacts {
  const profile = context.companyProfile

  return {
    companyName: profile.name || 'Unbekannt',
    legalForm: '',  // Nicht im DraftContext enthalten
    industry: Array.isArray(profile.industry) ? profile.industry.join(', ') : (profile.industry || ''),
    location: '',   // Nicht im DraftContext enthalten
    employeeCount: profile.employeeCount || 0,

    teamStructure: deriveTeamStructure(profile.employeeCount),
    itLandscape: deriveItLandscape(profile.businessModel, profile.isPublicSector),
    specialFeatures: deriveSpecialFeatures(profile),

    triggeredRegulations: deriveRegulations(context),
    primaryUseCases: [],  // Nicht im DraftContext enthalten

    narrativeTags,
  }
}

// ============================================================================
// Private Helpers
// ============================================================================

function deriveTeamStructure(employeeCount: number): string {
  if (employeeCount > 500) return 'Konzernstruktur'
  if (employeeCount > 50) return 'mittelstaendisch'
  return 'Kleinunternehmen'
}

function deriveItLandscape(businessModel: string, isPublicSector: boolean): string {
  if (businessModel?.includes('SaaS') || businessModel?.includes('Cloud')) return 'Cloud-First'
  if (isPublicSector) return 'On-Premise'
  return 'Hybrid'
}

function deriveSpecialFeatures(profile: DraftContext['companyProfile']): string[] {
  const features: string[] = []
  if (profile.isPublicSector) features.push('Oeffentlicher Sektor')
  if (profile.employeeCount > 250) features.push('Grossunternehmen')
  if (profile.dataProtectionOfficer) features.push('Interner DSB benannt')
  return features
}

function deriveRegulations(context: DraftContext): string[] {
  const regs = new Set<string>(['DSGVO'])
  const triggers = context.decisions.hardTriggers || []
  for (const t of triggers) {
    if (t.id.includes('ai_act') || t.id.includes('ai-act')) regs.add('AI Act')
    if (t.id.includes('nis2') || t.id.includes('NIS2')) regs.add('NIS2')
    if (t.id.includes('ttdsg') || t.id.includes('TTDSG')) regs.add('TTDSG')
  }
  return Array.from(regs)
}