// ISMS-Tool — Prisma-Schema
// Fundament (Iteration 1): Mandanten, Nutzer, RBAC, Audit-Log.
// Fachliche Entitäten (Assets, BIA, Risiken, …) folgen je Iteration — siehe docs/SPEC.md §5.
//
// Multi-Tenant-Regel: Jede fachliche Tabelle trägt tenantId. Zugriff nur über den
// zentralen Tenant-Guard (src/server/db.ts); zusätzlich Postgres RLS (prisma/rls.sql).

generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["postgresqlExtensions"]
}

datasource db {
  provider   = "postgresql"
  extensions = [pgvector(map: "vector")]
}

enum TenantStatus {
  ACTIVE
  SUSPENDED
  ARCHIVED
}

enum UserStatus {
  ACTIVE
  INVITED
  LOCKED
  DEACTIVATED
}

model Tenant {
  id        String       @id @default(cuid())
  name      String
  slug      String       @unique
  short     String?
  sector    String?
  status    TenantStatus @default(ACTIVE)
  config    Json         @default("{}")
  createdAt DateTime     @default(now()) @map("created_at")
  updatedAt DateTime     @updatedAt @map("updated_at")

  users     User[]
  roles     Role[]
  auditLogs AuditLog[]
  settings  TenantSettings?
  modules   TenantModule[]

  @@map("tenants")
}

// Mandanten-Einstellungen: Quelle der ISMS-Template-Variablen (§4.1) + Branding/Policy
model TenantSettings {
  id                    String   @id @default(cuid())
  tenantId              String   @unique @map("tenant_id")
  orgName               String   @map("org_name")
  orgShort              String?  @map("org_short")
  address               String?
  sector                String?
  duns                  String?
  ismsScope             String?  @map("isms_scope")
  ismsScopeDescription  String?  @map("isms_scope_description")
  roleManagement        String?  @map("role_management")
  roleIsb               String?  @map("role_isb")
  roleItLead            String?  @map("role_it_lead")
  roleDpo               String?  @map("role_dpo")
  logoKey               String?  @map("logo_key")
  accent                String?
  locale                String   @default("de")
  timezone              String   @default("Europe/Berlin")
  tisaxLevel            String   @default("AL2") @map("tisax_level") // AL2 | AL3
  securityPolicy        Json     @default("{}") @map("security_policy") // pw/mfa/session
  smtp                  Json     @default("{}")
  createdAt             DateTime @default(now()) @map("created_at")
  updatedAt             DateTime @updatedAt @map("updated_at")

  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("tenant_settings")
}

// Modul-Freischaltung je Mandant (Feature-Toggle) — gated Navigation, API und Daten
model TenantModule {
  id         String   @id @default(cuid())
  tenantId   String   @map("tenant_id")
  moduleKey  String   @map("module_key")
  enabled    Boolean  @default(true)
  createdAt  DateTime @default(now()) @map("created_at")
  updatedAt  DateTime @updatedAt @map("updated_at")

  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@unique([tenantId, moduleKey])
  @@index([tenantId])
  @@map("tenant_modules")
}

model User {
  id           String     @id @default(cuid())
  tenantId     String     @map("tenant_id")
  email        String
  passwordHash String     @map("password_hash")
  name         String
  status       UserStatus @default(ACTIVE)
  // Erzwungener Passwortwechsel beim nächsten Login (Initial-/Reset-Passwort).
  mustChangePassword Boolean @default(false) @map("must_change_password")
  // Optionale TOTP-MFA je Nutzer (Paket C). recoveryCodes = SHA-256-Hashes.
  mfaSecret     String?    @map("mfa_secret")
  mfaEnrolledAt DateTime?  @map("mfa_enrolled_at")
  recoveryCodes Json       @default("[]") @map("recovery_codes")
  // Plattform-Admin ist mandantenübergreifend (Betreiberrolle)
  isPlatformAdmin Boolean @default(false) @map("is_platform_admin")
  createdAt    DateTime   @default(now()) @map("created_at")
  updatedAt    DateTime   @updatedAt @map("updated_at")

  tenant         Tenant     @relation(fields: [tenantId], references: [id])
  userRoles      UserRole[]
  ownedAssets    Asset[]    @relation("assetOwner")
  ownedProcesses Process[]  @relation("processOwner")
  ownedRisks     Risk[]     @relation("riskOwner")
  ownedMeasures  Measure[]  @relation("measureOwner")

  @@unique([tenantId, email])
  @@index([tenantId])
  @@map("users")
}

model Role {
  id       String @id @default(cuid())
  tenantId String @map("tenant_id")
  key      String // z. B. tenant-admin, isb, auditor, owner, user
  name     String

  tenant          Tenant           @relation(fields: [tenantId], references: [id])
  userRoles       UserRole[]
  rolePermissions RolePermission[]

  @@unique([tenantId, key])
  @@index([tenantId])
  @@map("roles")
}

model Permission {
  id  String @id @default(cuid())
  key String @unique // z. B. asset:read, risk:write, incident:manage

  rolePermissions RolePermission[]

  @@map("permissions")
}

model UserRole {
  userId String @map("user_id")
  roleId String @map("role_id")

  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
  role Role @relation(fields: [roleId], references: [id], onDelete: Cascade)

  @@id([userId, roleId])
  @@map("user_roles")
}

model RolePermission {
  roleId       String @map("role_id")
  permissionId String @map("permission_id")

  role       Role       @relation(fields: [roleId], references: [id], onDelete: Cascade)
  permission Permission @relation(fields: [permissionId], references: [id], onDelete: Cascade)

  @@id([roleId, permissionId])
  @@map("role_permissions")
}

// Plattform-Administratoren (Betreiber). Getrennter Store OHNE tenant_id, eigener
// Login (/platform/login), TOTP-MFA-Pflicht + Recovery-Codes. Kein Zugriff auf
// Mandanten-Fachdaten (nur Betrieb: Mandanten, Module, Lebenszyklus). §Phase-1-Härtung.
model PlatformAdmin {
  id            String    @id @default(cuid())
  email         String    @unique
  passwordHash  String    @map("password_hash")
  name          String
  status        String    @default("ACTIVE") // ACTIVE | LOCKED | DISABLED
  mfaSecret     String?   @map("mfa_secret")
  mfaEnrolledAt DateTime? @map("mfa_enrolled_at")
  recoveryCodes Json      @default("[]") @map("recovery_codes") // SHA-256-Hashes der Recovery-Codes
  failedLogins  Int       @default(0) @map("failed_logins")
  lockedUntil   DateTime? @map("locked_until")
  lastLoginAt   DateTime? @map("last_login_at")
  createdAt     DateTime  @default(now()) @map("created_at")
  updatedAt     DateTime  @updatedAt @map("updated_at")

  @@map("platform_admins")
}

// Plattformweite Betriebseinstellungen (Singleton). Steuert u. a., ob MFA für
// Plattform-Admins verpflichtend ist (Default: aus → MFA optional, Paket C).
model PlatformSetting {
  id          String   @id @default("singleton")
  mfaRequired Boolean  @default(false) @map("mfa_required")
  updatedAt   DateTime @updatedAt @map("updated_at")

  @@map("platform_settings")
}

// ── Assets & BIA (ein Modul, SPEC §4.1) ─────────────────────────────────────

enum AssetType {
  INFORMATION
  SYSTEM
  APPLICATION
  LOCATION
  SUPPLIER
  IT_SERVICE
  SOFTWARE
  PROJECT
  PERSON
  DATA
}

enum AssetStatus {
  ACTIVE
  PLANNED
  RETIRED
}

enum ProcessAssetRole {
  PRIMARY
  SECONDARY
}

enum ProcessCategory {
  CORE       // Kernprozess
  MANAGEMENT // Managementprozess
  SUPPORT    // Unterstützender Prozess
}

model Asset {
  id          String      @id @default(cuid())
  tenantId    String      @map("tenant_id")
  name        String
  description String?
  type        AssetType
  status      AssetStatus @default(ACTIVE)
  ownerId     String?     @map("owner_id")
  location    String?
  tags        String[]    @default([])
  // Schutzbedarf 1–4 je Schutzziel (C/I/A)
  confidentiality Int @default(1)
  integrity       Int @default(1)
  availability    Int @default(1)
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  owner         User?           @relation("assetOwner", fields: [ownerId], references: [id])
  relationsFrom AssetRelation[] @relation("relationFrom")
  relationsTo   AssetRelation[] @relation("relationTo")
  processAssets ProcessAsset[]
  riskAssets    RiskAsset[]

  // Lieferanten-/IT-Service-Erweiterungen (1:1) + Kind-Entitäten
  supplierProfile SupplierProfile?
  serviceProfile  ITServiceProfile? @relation("serviceAsset")
  serviceProvided ITServiceProfile[] @relation("serviceProvider")
  softwareProfile SoftwareProfile?  @relation("softwareAsset")
  softwareProvided SoftwareProfile[] @relation("softwareProvider")
  projectProfile  ProjectProfile?
  assessments     SupplierAssessment[]
  evidence        SupplierEvidence[]
  decisions       ManagementDecision[]
  contracts       Contract[]
  ndas            Nda[]
  subcontractors  Subcontractor[]
  raci            ServiceControlResponsibility[]
  maturity        MaturityAssessment?

  @@index([tenantId])
  @@index([tenantId, type])
  @@map("assets")
}

model AssetRelation {
  id             String @id @default(cuid())
  tenantId       String @map("tenant_id")
  assetId        String @map("asset_id")
  relatedAssetId String @map("related_asset_id")
  // z. B. depends_on, hosts, processes_data_of
  type           String @default("depends_on")

  asset        Asset @relation("relationFrom", fields: [assetId], references: [id], onDelete: Cascade)
  relatedAsset Asset @relation("relationTo", fields: [relatedAssetId], references: [id], onDelete: Cascade)

  @@unique([assetId, relatedAssetId, type])
  @@index([tenantId])
  @@map("asset_relations")
}

model Process {
  id          String          @id @default(cuid())
  tenantId    String          @map("tenant_id")
  name        String
  description String?
  category    ProcessCategory @default(CORE)
  ownerId     String?         @map("owner_id")
  createdAt   DateTime @default(now()) @map("created_at")
  updatedAt   DateTime @updatedAt @map("updated_at")
  createdBy   String?  @map("created_by")

  owner         User?          @relation("processOwner", fields: [ownerId], references: [id])
  processAssets ProcessAsset[]
  bia           BiaEntry?
  risks         Risk[]

  @@index([tenantId])
  @@map("processes")
}

model ProcessAsset {
  id        String           @id @default(cuid())
  tenantId  String           @map("tenant_id")
  processId String           @map("process_id")
  assetId   String           @map("asset_id")
  role      ProcessAssetRole @default(SECONDARY)

  process Process @relation(fields: [processId], references: [id], onDelete: Cascade)
  asset   Asset   @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@unique([processId, assetId])
  @@index([tenantId])
  @@map("process_assets")
}

model BiaEntry {
  id        String @id @default(cuid())
  tenantId  String @map("tenant_id")
  processId String @unique @map("process_id")
  // Wiederanlaufparameter in Stunden (SPEC §4.1.2)
  rtoHours Int? @map("rto_hours")
  rpoHours Int? @map("rpo_hours")
  mtdHours Int? @map("mtd_hours")
  // Schadenshöhe 1–4 je Schutzziel
  impactC Int @default(1) @map("impact_c")
  impactI Int @default(1) @map("impact_i")
  impactA Int @default(1) @map("impact_a")
  // Kritikalität 1–4, abgeleitet (Max-Prinzip), redundant gespeichert für Listen/Filter
  criticality Int      @default(1)
  notes       String?
  createdAt   DateTime @default(now()) @map("created_at")
  updatedAt   DateTime @updatedAt @map("updated_at")

  process Process @relation(fields: [processId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("bia_entries")
}

// ── Risikoanalyse (SPEC §4.2) ───────────────────────────────────────────────

enum RiskTreatment {
  AVOID    // Vermeiden
  MITIGATE // Vermindern
  TRANSFER // Übertragen
  ACCEPT   // Akzeptieren
}

enum RiskStatus {
  OPEN
  IN_TREATMENT
  ACCEPTED
  CLOSED
}

model Risk {
  id       String @id @default(cuid())
  tenantId String @map("tenant_id")
  // Laufende Nummer je Mandant → Anzeige als "R-001"
  refNo    Int    @map("ref_no")

  title         String
  description   String?
  threat        String? // Bedrohung (Katalog folgt, SPEC §5)
  vulnerability String? // Schwachstelle

  // Brutto-Bewertung: Eintrittswahrscheinlichkeit × Auswirkung (je 1–5)
  likelihood Int @default(1)
  impact     Int @default(1)
  score      Int @default(1) // redundant für Listen/Heatmap

  // Rest-Risiko nach Maßnahmen (berechnet, dezimal wegen Teil-Minderungen)
  residualLikelihood Float? @map("residual_likelihood")
  residualImpact     Float? @map("residual_impact")
  residualScore      Float? @map("residual_score")

  treatment RiskTreatment @default(MITIGATE)
  status    RiskStatus    @default(OPEN)
  ownerId   String?       @map("owner_id")
  processId String?       @map("process_id")

  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  owner        User?         @relation("riskOwner", fields: [ownerId], references: [id])
  process      Process?      @relation(fields: [processId], references: [id])
  riskAssets   RiskAsset[]
  riskMeasures RiskMeasure[]

  @@unique([tenantId, refNo])
  @@index([tenantId])
  @@index([tenantId, status])
  @@map("risks")
}

model RiskAsset {
  id       String @id @default(cuid())
  tenantId String @map("tenant_id")
  riskId   String @map("risk_id")
  assetId  String @map("asset_id")

  risk  Risk  @relation(fields: [riskId], references: [id], onDelete: Cascade)
  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@unique([riskId, assetId])
  @@index([tenantId])
  @@map("risk_assets")
}

// ── Maßnahmen (SPEC §4.4) ───────────────────────────────────────────────────

enum MeasureStatus {
  OPEN
  IN_PROGRESS
  DONE
}

enum MeasurePriority {
  LOW
  MEDIUM
  HIGH
}

model Measure {
  id       String @id @default(cuid())
  tenantId String @map("tenant_id")
  refNo    Int    @map("ref_no") // Anzeige als "M-001"

  title       String
  description String?
  status      MeasureStatus   @default(OPEN)
  priority    MeasurePriority @default(MEDIUM)
  ownerId     String?         @map("owner_id")
  dueDate     DateTime?       @map("due_date")

  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  owner        User?         @relation("measureOwner", fields: [ownerId], references: [id])
  riskMeasures RiskMeasure[]

  @@unique([tenantId, refNo])
  @@index([tenantId])
  @@index([tenantId, status])
  @@map("measures")
}

// Verknüpfung Risiko ↔ Maßnahme inkl. erwarteter Risikominderung:
// Das Rest-Risiko wird aus likelihood/impact minus der Summe der
// Minderungen aller verknüpften Maßnahmen berechnet (siehe src/server/risk-calc.ts).
model RiskMeasure {
  id        String @id @default(cuid())
  tenantId  String @map("tenant_id")
  riskId    String @map("risk_id")
  measureId String @map("measure_id")

  // Minderung je Dimension (0,00–4,00) — mehrere Maßnahmen summieren sich,
  // bis ein voller Punkt (oder mehr) erreicht ist
  reductionLikelihood Float @default(0) @map("reduction_likelihood")
  reductionImpact     Float @default(0) @map("reduction_impact")

  risk    Risk    @relation(fields: [riskId], references: [id], onDelete: Cascade)
  measure Measure @relation(fields: [measureId], references: [id], onDelete: Cascade)

  @@unique([riskId, measureId])
  @@index([tenantId])
  @@map("risk_measures")
}

// Globale Kataloge (SPEC §5: Threat/Vulnerability, mandantenübergreifend).
// Risiken speichern weiterhin Freitext — der Katalog liefert Vorschläge (datalist),
// eigene Formulierungen bleiben möglich.
model Threat {
  id   String @id @default(cuid())
  name String @unique

  @@map("threats")
}

model Vulnerability {
  id   String @id @default(cuid())
  name String @unique

  @@map("vulnerabilities")
}

// ── Lieferanten- & IT-Service-Management (VDA-ISA 2027 Kap. 6, NIS2 Art. 21(2)(d)) ──
// Grundsatz: Lieferanten UND IT-Services sind Assets (type SUPPLIER | IT_SERVICE).
// SupplierProfile/ITServiceProfile sind 1:1-Erweiterungen eines Asset; alle
// Kind-Entitäten hängen am Asset (subject) — keine parallele Datenhaltung.

enum SupplierLifecycle {
  ACTIVE
  ONBOARDING
  UNDER_REVIEW
  OFFBOARDED
}

enum AssessmentType {
  QUESTIONNAIRE
  SELF_ASSESSMENT
  AUDIT
}

enum EvidenceKind {
  CERTIFICATE
  TISAX_LABEL
  ATTESTATION
  AUDIT_REPORT
  SELF_ASSESSMENT
}

enum RaciResponsibility {
  PROVIDER
  US
  SHARED
}

model SupplierProfile {
  id       String @id @default(cuid())
  tenantId String @map("tenant_id")
  assetId  String @unique @map("asset_id")
  refNo    Int    @map("ref_no")

  sector         String?
  serviceDesc    String?           @map("service_desc")
  criticality    Int               @default(1)
  dataCategories String[]          @default([]) @map("data_categories")
  nis2Relevant   Boolean           @default(false) @map("nis2_relevant")
  lifecycle      SupplierLifecycle @default(ACTIVE)
  contact        String?
  tisaxLabel     String?           @map("tisax_label")
  tisaxValidTo   DateTime?         @map("tisax_valid_to")
  nextReview     DateTime?         @map("next_review")
  notes          String?

  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@unique([tenantId, refNo])
  @@index([tenantId])
  @@map("supplier_profiles")
}

model ITServiceProfile {
  id              String  @id @default(cuid())
  tenantId        String  @map("tenant_id")
  assetId         String  @unique @map("asset_id")
  refNo           Int     @map("ref_no")
  providerAssetId String? @map("provider_asset_id") // Asset(type SUPPLIER)
  criticality     Int     @default(1)
  internal        Boolean @default(false)
  notes           String?

  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  asset    Asset  @relation("serviceAsset", fields: [assetId], references: [id], onDelete: Cascade)
  provider Asset? @relation("serviceProvider", fields: [providerAssetId], references: [id])

  @@unique([tenantId, refNo])
  @@index([tenantId])
  @@map("it_service_profiles")
}

// Software-Whitelist als Asset (analog IT-Service, R11/VA-16): eine freigegebene
// Software ist ein Asset(type SOFTWARE) mit optionalem Anbieter (Asset type SUPPLIER).
model SoftwareProfile {
  id              String  @id @default(cuid())
  tenantId        String  @map("tenant_id")
  assetId         String  @unique @map("asset_id")
  refNo           Int     @map("ref_no")
  providerAssetId String? @map("provider_asset_id") // Asset(type SUPPLIER)
  version         String? // Version/Patch-Stand
  approvalStatus  SoftwareApprovalStatus @default(BEANTRAGT) @map("approval_status")
  approvedBy      String? @map("approved_by")
  criticality     Int     @default(1)
  nextReview      DateTime? @map("next_review")
  notes           String?

  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  asset    Asset  @relation("softwareAsset", fields: [assetId], references: [id], onDelete: Cascade)
  provider Asset? @relation("softwareProvider", fields: [providerAssetId], references: [id])

  @@unique([tenantId, refNo])
  @@index([tenantId])
  @@map("software_profiles")
}

enum SoftwareApprovalStatus {
  BEANTRAGT   // Freigabe beantragt
  FREIGEGEBEN // freigegeben (Whitelist)
  GESPERRT    // gesperrt/untersagt
}

// Informationssicherheit in Projekten (R01/VA-19): ein Projekt ist ein Asset(type PROJECT)
// mit Kritikalität (C/I/A am Asset) und Risiko-Verknüpfung (RiskAsset).
model ProjectProfile {
  id             String  @id @default(cuid())
  tenantId       String  @map("tenant_id")
  assetId        String  @unique @map("asset_id")
  refNo          Int     @map("ref_no")
  classification String? // IS-Klassifizierung
  isbInvolved    Boolean @default(false) @map("isb_involved")
  status         ProjectStatus @default(GEPLANT)
  notes          String?

  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")
  createdBy String?  @map("created_by")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@unique([tenantId, refNo])
  @@index([tenantId])
  @@map("project_profiles")
}

enum ProjectStatus {
  GEPLANT
  LAUFEND
  ABGESCHLOSSEN
  ABGEBROCHEN
}

// Bewertung & Nachweise (6.1.1)
model SupplierAssessment {
  id         String         @id @default(cuid())
  tenantId   String         @map("tenant_id")
  assetId    String         @map("asset_id")
  type       AssessmentType
  score      Int?
  selfScore  Int?           @map("self_score")
  verifiedScore Int?        @map("verified_score")
  date       DateTime?
  nextReview DateTime?      @map("next_review")
  result     String?
  createdAt  DateTime       @default(now()) @map("created_at")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("supplier_assessments")
}

model SupplierEvidence {
  id              String       @id @default(cuid())
  tenantId        String       @map("tenant_id")
  assetId         String       @map("asset_id") // Subjekt (Lieferant ODER Service)
  kind            EvidenceKind
  name            String?
  protectsCia     String?      @map("protects_cia")
  validTo         DateTime?    @map("valid_to")
  adequacyChecked Boolean      @default(false) @map("adequacy_checked")
  createdAt       DateTime     @default(now()) @map("created_at")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("supplier_evidence")
}

model ManagementDecision {
  id            String   @id @default(cuid())
  tenantId      String   @map("tenant_id")
  assetId       String   @map("asset_id")
  reasonNoAudit String   @map("reason_no_audit")
  decision      String
  decidedBy     String?  @map("decided_by")
  date          DateTime @default(now())
  recordRef     String?  @map("record_ref")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("management_decisions")
}

// Vertrag & Geheimhaltung (6.1.1 / 6.1.2)
model Contract {
  id                       String    @id @default(cuid())
  tenantId                 String    @map("tenant_id")
  assetId                  String    @map("asset_id")
  type                     String    @default("service")
  avDpa                    Boolean   @default(false) @map("av_dpa")
  securityClauses          Boolean   @default(false) @map("security_clauses")
  flowdown                 Boolean   @default(false)
  customerRequirementsPassed Boolean @default(false) @map("customer_requirements_passed")
  validFrom                DateTime? @map("valid_from")
  validTo                  DateTime? @map("valid_to")
  reference                String?
  createdAt                DateTime  @default(now()) @map("created_at")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("contracts")
}

model Nda {
  id              String    @id @default(cuid())
  tenantId        String    @map("tenant_id")
  assetId         String    @map("asset_id")
  parties         String?
  infoScope       String?   @map("info_scope")
  subject         String?
  validFrom       DateTime? @map("valid_from")
  validTo         DateTime? @map("valid_to")
  obligations     String?
  beyondTerm      Boolean   @default(false) @map("beyond_term")
  extensionStatus String?   @map("extension_status")
  createdAt       DateTime  @default(now()) @map("created_at")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("ndas")
}

model Subcontractor {
  id                 String  @id @default(cuid())
  tenantId           String  @map("tenant_id")
  assetId            String  @map("asset_id")
  name               String
  flowdownObligation Boolean @default(false) @map("flowdown_obligation")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("subcontractors")
}

// Verantwortung je IT-Service (6.1.3) — RACI über den ISA-Control-Katalog
model ServiceControlResponsibility {
  id             String             @id @default(cuid())
  tenantId       String             @map("tenant_id")
  assetId        String             @map("asset_id") // Asset(type IT_SERVICE)
  controlRef     String             @map("control_ref")
  title          String?
  applicable     Boolean            @default(true)
  responsibility RaciResponsibility @default(SHARED)
  evidenceRef    String?            @map("evidence_ref")
  createdAt      DateTime           @default(now()) @map("created_at")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("service_control_responsibilities")
}

// Reifegrad je Subjekt — Fragebogen-Selbstauskunft, durch Nachweise verifiziert, ISB-Freigabe
model MaturityAssessment {
  id              String    @id @default(cuid())
  tenantId        String    @map("tenant_id")
  assetId         String    @unique @map("asset_id")
  selfValue       Float?    @map("self_value")
  verifiedValue   Float?    @map("verified_value")
  computedValue   Float?    @map("computed_value")
  isbValue        Float?    @map("isb_value")
  isbJustification String?  @map("isb_justification")
  approvedBy      String?   @map("approved_by")
  approvedAt      DateTime? @map("approved_at")
  updatedAt       DateTime  @updatedAt @map("updated_at")

  asset Asset @relation(fields: [assetId], references: [id], onDelete: Cascade)

  @@index([tenantId])
  @@map("maturity_assessments")
}

model AuditLog {
  id        String   @id @default(cuid())
  // Nullable: Plattform-Ereignisse (scope=platform, z. B. Superadmin-Login) haben keinen Mandantenbezug.
  tenantId  String?  @map("tenant_id")
  scope     String   @default("tenant") // tenant | platform
  actorId   String?  @map("actor_id")
  action    String // create | update | delete | login | denied | export | …
  entity    String // z. B. asset, risk, user
  entityId  String?  @map("entity_id")
  before    Json?
  after     Json?
  createdAt DateTime @default(now()) @map("created_at")

  tenant Tenant? @relation(fields: [tenantId], references: [id])

  @@index([tenantId, entity, entityId])
  @@index([tenantId, createdAt])
  @@map("audit_logs")
}

// Generisches Aufgaben-/Freigabe-Modell (erweiterbar). Erster Typ: policy_approval
// (Richtlinien-Freigabe an eine konkrete Person). Kommentare/Statuswechsel historisiert.
model Task {
  id           String        @id @default(cuid())
  tenantId     String        @map("tenant_id")
  type         String        // policy_approval | …
  title        String
  status       String        @default("OPEN") // OPEN | DONE | REJECTED | CANCELLED
  entityType   String?       @map("entity_type") // z. B. policy_document
  entityId     String?       @map("entity_id")
  entityRef    String?       @map("entity_ref")  // Deep-Link-Referenz, z. B. Policy-Code
  assigneeId   String?       @map("assignee_id") // wer bearbeiten/freigeben soll
  createdById  String?       @map("created_by_id")
  dueDate      DateTime?     @map("due_date")
  resolvedById String?       @map("resolved_by_id")
  resolvedAt   DateTime?     @map("resolved_at")
  createdAt    DateTime      @default(now()) @map("created_at")
  updatedAt    DateTime      @updatedAt @map("updated_at")

  comments TaskComment[]

  @@index([tenantId, status])
  @@index([tenantId, assigneeId, status])
  @@map("tasks")
}

model TaskComment {
  id        String   @id @default(cuid())
  tenantId  String   @map("tenant_id")
  taskId    String   @map("task_id")
  authorId  String?  @map("author_id")
  kind      String   @default("comment") // comment | approve | reject | submit
  body      String
  createdAt DateTime @default(now()) @map("created_at")

  task Task @relation(fields: [taskId], references: [id], onDelete: Cascade)

  @@index([tenantId, taskId])
  @@map("task_comments")
}

// ── Richtlinien & Verfahren (VDA-ISA 2027 Vorlagenpaket) ──────────────────────
// Dokumente werden aus ihrer echten Markdown-Vorlage gerendert; Variablen,
// Feature-Flags und Baseline-Parameter sind die eine Pflegestelle (§7).

enum PolicyDocType {
  LEITLINIE   // L00
  RICHTLINIE  // R01–R14
  VERFAHREN   // VA-01–VA-13
  REGISTER    // verwaltete Tabellen (Baseline, Nachweisregister, …)
  HANDBUCH    // Anwender-Handbuch
  EIGENES     // Word-Upload
}

enum PolicyStatus {
  ENTWURF
  IN_FREIGABE
  FREIGEGEBEN
  ARCHIVIERT
}

model PolicyDocument {
  id          String        @id @default(cuid())
  tenantId    String        @map("tenant_id")
  code        String // L00 | R01..R14 | VA-01..VA-13 | BASELINE | NACHWEIS | ISA_MAPPING
  type        PolicyDocType
  title       String
  version     String        @default("1.0")
  status      PolicyStatus  @default(FREIGEGEBEN)
  owner       String?
  policyCode  String?       @map("policy_code") // bei VA: operationalisierte Richtlinie (R..)
  fulfills    String[]      @default([]) // bei VA: erfüllte Anforderungs-IDs
  rawMarkdown String        @map("raw_markdown") // Vorlagen-Markdown mit Platzhaltern
  orderIdx    Int           @default(0) @map("order_idx")
  // Freigabe-Workflow (Vier-Augen): wer eingereicht/genehmigt hat
  submittedBy String?       @map("submitted_by")
  approvedBy  String?       @map("approved_by")
  approvedAt  DateTime?     @map("approved_at")
  // Schutzbedarf-/TISAX-Level-Override je Richtlinie: null = global, "AL2" | "AL3"
  protectionOverride String? @map("protection_override")
  // Lifecycle (nicht-destruktiver Re-Import): gesetzt, wenn das Dokument nicht mehr
  // im Vorlagenpaket enthalten ist. null = aktiv. Orthogonal zum Freigabe-`status`.
  archivedAt  DateTime?     @map("archived_at")
  createdAt   DateTime      @default(now()) @map("created_at")
  updatedAt   DateTime      @updatedAt @map("updated_at")

  @@unique([tenantId, code])
  @@index([tenantId])
  @@map("policy_documents")
}

model PolicyRequirement {
  id             String   @id @default(cuid())
  tenantId       String   @map("tenant_id")
  reqId          String   @map("req_id") // z. B. 4.1.2-M1
  policyCode     String   @map("policy_code") // R08
  control        String // 4.1.2
  obligation     String // MUSS | SOLL
  condition      String? // FLAG_… oder null
  requirement    String
  implementation String
  vaCodes        String[] @default([]) @map("va_codes") // operationalisierende Verfahren
  nachweisLink   String?  @map("nachweis_link")
  // Lifecycle (nicht-destruktiver Re-Import): gesetzt, wenn die Anforderung nicht mehr
  // im Vorlagenpaket enthalten ist. null = aktiv.
  archivedAt     DateTime? @map("archived_at")
  createdAt      DateTime @default(now()) @map("created_at")

  @@unique([tenantId, reqId])
  @@index([tenantId])
  @@index([tenantId, control])
  @@map("policy_requirements")
}

// Wizard-Variablen und Feature-Flags (variables.schema.json) — eine Pflegestelle
model PolicyVariable {
  id        String   @id @default(cuid())
  tenantId  String   @map("tenant_id")
  key       String // UPPER_SNAKE, z. B. PW_MIN_LENGTH / FLAG_CLOUD_USED
  title     String
  kind      String // string | boolean
  groupName String?  @map("group_name")
  value     String // aktueller Wert (Default aus Schema); Flags als "true"/"false"
  required  Boolean  @default(false)
  orderIdx  Int      @default(0) @map("order_idx")
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

  @@unique([tenantId, key])
  @@index([tenantId])
  @@map("policy_variables")
}

model PolicyBaselineParam {
  id        String   @id @default(cuid())
  tenantId  String   @map("tenant_id")
  blId      String   @map("bl_id") // BL-IAM-01
  section   String // "1. Identitäts- und Zugriffsmanagement"
  name      String
  vorgabe   String // Vorlagentext (kann {{VARIABLE}} enthalten)
  orderIdx  Int      @default(0) @map("order_idx")
  createdAt DateTime @default(now()) @map("created_at")

  @@unique([tenantId, blId])
  @@index([tenantId])
  @@map("policy_baseline_params")
}

model PolicyEvidence {
  id             String   @id @default(cuid())
  tenantId       String   @map("tenant_id")
  nr             Int
  policyCode     String   @map("policy_code")
  nachweis       String
  quelle         String
  verantwortlich String
  turnus         String
  createdAt      DateTime @default(now()) @map("created_at")

  @@index([tenantId])
  @@map("policy_evidence")
}

// ── Verwaltete Register-Tabellen (§7b) ───────────────────────────────────────

// Verschlüsselungsmechanismen-Register (VA-07 Kryptokonzept & Schlüsselverwaltung)
model CryptoEntry {
  id             String    @id @default(cuid())
  tenantId       String    @map("tenant_id")
  dienst         String
  schluessel     String
  algorithmus    String?
  ablaufdatum    DateTime? @map("ablauf_datum")
  verantwortlich String
  speicherort    String?
  baselineRef    String?   @map("baseline_ref") // z. B. BL-CRY-02
  notes          String?
  orderIdx       Int       @default(0) @map("order_idx")
  createdAt      DateTime  @default(now()) @map("created_at")
  updatedAt      DateTime  @updatedAt @map("updated_at")

  @@index([tenantId])
  @@map("crypto_entries")
}

// Klassifizierungs-Handhabungsmatrix (R02 / VA-08) — Schutzklassen × Aspekte
model ClassificationClass {
  id          String   @id @default(cuid())
  tenantId    String   @map("tenant_id")
  name        String
  description String?
  orderIdx    Int      @default(0) @map("order_idx")
  createdAt   DateTime @default(now()) @map("created_at")

  rules HandlingRule[]

  @@index([tenantId])
  @@map("classification_classes")
}

model HandlingAspect {
  id        String   @id @default(cuid())
  tenantId  String   @map("tenant_id")
  name      String
  category  String?
  orderIdx  Int      @default(0) @map("order_idx")
  createdAt DateTime @default(now()) @map("created_at")

  rules HandlingRule[]

  @@index([tenantId])
  @@map("handling_aspects")
}

model HandlingRule {
  id       String @id @default(cuid())
  tenantId String @map("tenant_id")
  classId  String @map("class_id")
  aspectId String @map("aspect_id")
  text     String

  class  ClassificationClass @relation(fields: [classId], references: [id], onDelete: Cascade)
  aspect HandlingAspect      @relation(fields: [aspectId], references: [id], onDelete: Cascade)

  @@unique([classId, aspectId])
  @@index([tenantId])
  @@map("handling_rules")
}

// Risiko-Bewertungsmatrix (R03 / VA-09) — zentrale Pflegestelle (Defaults FB-80-04)
model RiskMatrixClass {
  id         String   @id @default(cuid())
  tenantId   String   @map("tenant_id")
  name       String // Niedrig | Mittel | Hoch | Kritisch
  maxScore   Int      @map("max_score") // obere Schwelle des Risikowerts
  acceptance String // Akzeptanzinstanz
  tone       String // ok | warn | orange | risk
  orderIdx   Int      @default(0) @map("order_idx")
  createdAt  DateTime @default(now()) @map("created_at")

  @@index([tenantId])
  @@map("risk_matrix_classes")
}

model RiskEwLevel {
  id         String   @id @default(cuid())
  tenantId   String   @map("tenant_id")
  level      Int
  label      String
  definition String
  createdAt  DateTime @default(now()) @map("created_at")

  @@index([tenantId])
  @@map("risk_ew_levels")
}

model RiskDamageDimension {
  id        String   @id @default(cuid())
  tenantId  String   @map("tenant_id")
  name      String
  levels    Json // { "1": "…", "2": "…", "3": "…", "4": "…" }
  orderIdx  Int      @default(0) @map("order_idx")
  createdAt DateTime @default(now()) @map("created_at")

  @@index([tenantId])
  @@map("risk_damage_dimensions")
}

// Anwender-Handbuch (§9.7) — kuratierte Themen mit Deep-Links; Werte via Templating
model HandbookTopic {
  id         String   @id @default(cuid())
  tenantId   String   @map("tenant_id")
  category   String
  title      String
  bodyMd     String   @map("body_md") // Markdown mit {{VARIABLE}} (bleibt via Baseline synchron)
  sourceRefs String[] @default([]) @map("source_refs") // Deep-Links, z. B. R08#4.1.2
  orderIdx   Int      @default(0) @map("order_idx")
  createdAt  DateTime @default(now()) @map("created_at")
  updatedAt  DateTime @updatedAt @map("updated_at")

  @@index([tenantId])
  @@map("handbook_topics")
}

// Generisches verwaltetes Register (GAP-Report WP3.0): benannte Register mit
// Register-ID (REG-…), definierten Pflichtspalten, Review-Turnus und optionalen
// Cross-Links an Lieferanten (R13/VA-10) und Asset-Inventar (R02/VA-08).
model ManagedRegister {
  id           String   @id @default(cuid())
  tenantId     String   @map("tenant_id")
  code         String // REG-PROJECTS, REG-SW-WHITELIST, …
  title        String
  description  String?
  columns      Json     @default("[]") // [{ key, label }] Pflichtspalten
  reviewCycle  String?  @map("review_cycle")
  responsible  String?
  supplierLink Boolean  @default(false) @map("supplier_link") // Cross-Link Lieferant (Asset)
  assetLink    Boolean  @default(false) @map("asset_link") // Cross-Link Asset
  createdAt    DateTime @default(now()) @map("created_at")
  updatedAt    DateTime @updatedAt @map("updated_at")

  rows RegisterRow[]

  @@unique([tenantId, code])
  @@index([tenantId])
  @@map("managed_registers")
}

model RegisterRow {
  id          String   @id @default(cuid())
  tenantId    String   @map("tenant_id")
  registerId  String   @map("register_id")
  values      Json     @default("{}") // { spaltenKey: wert }
  supplierRef String?  @map("supplier_ref") // Asset-ID (Lieferant)
  assetRef    String?  @map("asset_ref") // Asset-ID
  orderIdx    Int      @default(0) @map("order_idx")
  createdAt   DateTime @default(now()) @map("created_at")
  updatedAt   DateTime @updatedAt @map("updated_at")

  register ManagedRegister @relation(fields: [registerId], references: [id], onDelete: Cascade)

  @@index([tenantId, registerId])
  @@map("register_rows")
}