generator client {
  provider      = "prisma-client-js"
  binaryTargets = ["native", "debian-openssl-3.0.x"]
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

enum Role {
  ADMIN
  EDITOR
  VIEWER
}

enum CreditKind {
  CC
  REDESIGN_PAID
  REDESIGN_KULANZ
}

enum CreditSource {
  CC_PACKAGE
  REDESIGN_PACKAGE
  KULANZ
  ADJUSTMENT
  CONSUME
  REVERSAL
}

enum CharacterStatus {
  ACTIVE
  INACTIVE
}

enum InactiveReason {
  PLAYER_INACTIVITY
  REWORKED
  OTHER
}

enum ProductTarget {
  CC_PACKAGE
  REDESIGN_PACKAGE
  IGNORE
}

enum ImportStatus {
  PENDING
  COMMITTED
  DISCARDED
}

model User {
  id                 Int       @id @default(autoincrement())
  username           String    @unique
  passwordHash       String
  role               Role      @default(EDITOR)
  totpSecret         String?
  totpEnabled        Boolean   @default(false)
  isActive           Boolean   @default(true)
  mustChangePassword Boolean   @default(false)
  lastLoginAt        DateTime?
  createdAt          DateTime  @default(now())
  updatedAt          DateTime  @updatedAt

  sessions          Session[]
  auditEntries      AuditLog[]
  ledgerEntries     CreditLedger[] @relation("LedgerCreatedBy")
  charactersCreated Character[]    @relation("CharacterCreatedBy")
  imports           Import[]
}

model Session {
  id         String   @id @default(uuid())
  tokenHash  String   @unique
  userId     Int
  user       User     @relation(fields: [userId], references: [id], onDelete: Cascade)
  expiresAt  DateTime
  createdAt  DateTime @default(now())
  lastSeenAt DateTime @default(now())
  ip         String?
  userAgent  String?

  @@index([userId])
  @@index([expiresAt])
}

model Player {
  id          Int      @id @default(autoincrement())
  displayName String
  steamId     String?  @unique
  forumName   String?
  notes       String?
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  /// Von GExtension gemeldeter Verbrauchszähler. Reine Anzeige zum Abgleich,
  /// wird nie automatisch mit dem Ledger verrechnet.
  gextensionUsage    Int?
  gextensionSyncedAt DateTime?

  ledger     CreditLedger[]
  characters Character[]
  orders     ImportedOrder[]
  unmatched  UnmatchedPackage[]

  @@index([displayName])
}

/// Pakete, deren Titel nach CC oder Redesign klingt, sich aber keiner
/// Guthaben-Art sicher zuordnen lässt. Wird nie automatisch gebucht,
/// sondern im CC-Manager von Hand entschieden.
model UnmatchedPackage {
  id         Int      @id @default(autoincrement())
  externalId String   @unique
  playerId   Int?
  player     Player?  @relation(fields: [playerId], references: [id], onDelete: Cascade)
  steamId    String
  rawTitle   String
  rawTag     String
  amount     String?
  purchasedAt DateTime?
  scrapedAt  DateTime @default(now())

  resolved     Boolean   @default(false)
  /// CC_PACKAGE | REDESIGN_PACKAGE | REDESIGN_KULANZ | IGNORE
  resolvedAs   String?
  resolvedById Int?
  resolvedAt   DateTime?

  @@index([resolved])
  @@index([playerId])
}

/// Kontobuch: jede Guthaben-Bewegung ist eine Zeile (+1 Zugang, -1 Verbrauch).
/// Der offene Stand eines Topfes ist die Summe der amounts je kind.
model CreditLedger {
  id     Int        @id @default(autoincrement())
  player Player     @relation(fields: [playerId], references: [id], onDelete: Cascade)

  playerId Int
  kind     CreditKind
  amount   Int
  source   CreditSource

  /// Klammert zusammengehoerige Zeilen: ein CC-Paket schreibt zwei Zeilen
  /// mit derselben groupId, damit ein Storno beide zurückholt.
  groupId String @default(uuid())

  characterId Int?
  character   Character? @relation(fields: [characterId], references: [id], onDelete: SetNull)

  importId Int?
  import   Import? @relation(fields: [importId], references: [id], onDelete: SetNull)

  note String?

  /// Storno erfolgt als Gegenbuchung, nicht als Löschung. Das @unique
  /// verhindert, dass eine Zeile zweimal storniert wird.
  reversalOfId Int?          @unique
  reversalOf   CreditLedger? @relation("LedgerReversal", fields: [reversalOfId], references: [id], onDelete: NoAction, onUpdate: NoAction)
  reversedBy   CreditLedger? @relation("LedgerReversal")

  createdById Int?
  createdBy   User?    @relation("LedgerCreatedBy", fields: [createdById], references: [id], onDelete: SetNull)
  createdAt   DateTime @default(now())

  @@index([playerId])
  @@index([playerId, kind])
  @@index([groupId])
  @@index([createdAt])
}

model Character {
  id             Int             @id @default(autoincrement())
  playerId       Int
  player         Player          @relation(fields: [playerId], references: [id], onDelete: Cascade)
  name           String
  loreText       String?
  status         CharacterStatus @default(ACTIVE)
  inactiveReason InactiveReason?
  /// Klartext zum Grund, etwa "Einheit bis März entfernt". Nur zur Anzeige.
  inactiveNote   String?

  /// Alle CCs einer Redesign-Kette teilen sich die lineageId.
  lineageId     String      @default(uuid())
  predecessorId Int?
  predecessor   Character?  @relation("CharacterLineage", fields: [predecessorId], references: [id], onDelete: NoAction, onUpdate: NoAction)
  successors    Character[] @relation("CharacterLineage")

  ledgerEntries CreditLedger[]

  createdById Int?
  createdBy   User?    @relation("CharacterCreatedBy", fields: [createdById], references: [id], onDelete: SetNull)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@index([playerId])
  @@index([playerId, status])
  @@index([lineageId])
}

model Import {
  id          Int          @id @default(autoincrement())
  filename    String
  status      ImportStatus @default(PENDING)
  rowCount    Int          @default(0)
  bookedCount Int          @default(0)
  mapping     Json?
  createdAt   DateTime     @default(now())
  committedAt DateTime?

  importedById Int?
  importedBy   User? @relation(fields: [importedById], references: [id], onDelete: SetNull)

  rows          ImportRow[]
  orders        ImportedOrder[]
  ledgerEntries CreditLedger[]

  @@index([status])
}

model ImportRow {
  id       Int    @id @default(autoincrement())
  importId Int
  import   Import @relation(fields: [importId], references: [id], onDelete: Cascade)

  lineNo      Int
  externalId  String?
  playerKey   String?
  playerName  String?
  productName String?
  purchasedAt DateTime?

  target           ProductTarget?
  resolvedPlayerId Int?

  /// Was beim Buchen passieren würde: BOOK, CREATE_PLAYER_AND_BOOK,
  /// SKIP_DUPLICATE, SKIP_IGNORED, SKIP_UNMAPPED, SKIP_NO_PLAYER
  plan String
  raw  Json

  @@index([importId])
}

/// Dedup-Anker: eine bereits gebuchte Bestell-ID wird nie ein zweites Mal gebucht.
model ImportedOrder {
  id         Int           @id @default(autoincrement())
  externalId String        @unique
  importId   Int
  import     Import        @relation(fields: [importId], references: [id], onDelete: Cascade)
  playerId   Int
  player     Player        @relation(fields: [playerId], references: [id], onDelete: Cascade)
  target     ProductTarget
  groupId    String
  createdAt  DateTime      @default(now())

  @@index([playerId])
}

model ProductMapping {
  id           Int           @id @default(autoincrement())
  matchPattern String
  target       ProductTarget
  priority     Int           @default(100)
  isActive     Boolean       @default(true)
  note         String?
  createdAt    DateTime      @default(now())
  updatedAt    DateTime      @updatedAt

  @@index([priority])
}

model AuditLog {
  id          Int      @id @default(autoincrement())
  actorUserId Int?
  actor       User?    @relation(fields: [actorUserId], references: [id], onDelete: SetNull)
  /// Name wird mitgeschrieben, damit der Eintrag lesbar bleibt, wenn der Account weg ist.
  actorName   String?
  action      String
  targetType  String
  targetId    String?
  details     Json?
  ip          String?
  createdAt   DateTime @default(now())

  @@index([createdAt])
  @@index([targetType, targetId])
  @@index([actorUserId])
}