generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider          = "mysql"
  url               = env("DATABASE_URL")
  shadowDatabaseUrl = env("SHADOW_DATABASE_URL")
}

enum UserRole {
  USER
  ADMIN
}

model User {
  id           String     @id @default(cuid())
  email        String     @unique
  username     String     @unique
  passwordHash String
  name         String
  role         UserRole   @default(USER)
  createdAt    DateTime   @default(now())
  updatedAt    DateTime   @updatedAt
  companies    Company[]
  auditLogs    AuditLog[]

  @@map("users")
}

model AuditLog {
  id        String   @id @default(cuid())
  userId    String?
  user      User?    @relation(fields: [userId], references: [id], onDelete: SetNull)
  action    String
  entity    String?
  entityId  String?
  metadata  Json?
  ipAddress String?
  createdAt DateTime @default(now())

  @@index([userId])
  @@index([createdAt])
  @@map("audit_logs")
}

model Company {
  id                String              @id @default(cuid())
  name              String
  legalForm         String?
  taxId             String?
  vatId             String?
  address           String
  zip               String
  city              String
  country           String              @default("DE")
  email             String?
  phone             String?
  website           String?
  bankIban          String?
  bankBic           String?
  bankName          String?
  invoicePrefix     String              @default("RE")
  invoiceSequence   Int                 @default(0)
  kleinunternehmer  Boolean             @default(false)
  archived          Boolean             @default(false)
  archivedAt        DateTime?
  userId            String
  user              User                @relation(fields: [userId], references: [id], onDelete: Cascade)
  customers    Customer[]
  invoices     Invoice[]
  services     Service[]
  anlagegueter Anlagegut[]
  buchungen    Buchung[]
  kategorien   BuchungKategorie[]
  createdAt    DateTime   @default(now())
  updatedAt    DateTime   @updatedAt

  @@map("companies")
}

model BuchungKategorie {
  id        String   @id @default(cuid())
  companyId String
  company   Company  @relation(fields: [companyId], references: [id], onDelete: Cascade)
  name      String   // e.g., "Fußpflege", "Miete", "Privateinlagen"
  typ       String   // "EINNAHME" or "AUSGABE"
  createdAt DateTime @default(now())

  @@unique([companyId, name, typ])
  @@index([companyId])
  @@map("buchung_kategorien")
}

enum TransactionAccount {
  KASSE
  BANK
}

enum TransactionType {
  EINLAGE
  ENTNAHME
}

model Buchung {
  id                 String             @id @default(cuid())
  companyId          String
  company            Company            @relation(fields: [companyId], references: [id], onDelete: Cascade)
  date               DateTime
  account            TransactionAccount
  type               TransactionType
  amount             Decimal            @db.Decimal(10, 2)
  description        String?            @db.Text
  kategorie          String?            // Name of BuchungKategorie (nullable for manual transactions)
  steuersatz         Int?               // Tax rate: 0, 7, 19 (nullable for non-business records)
  zahlungsart        Zahlungsart?       // KASSE or BANK
  isBusinessRecord   Boolean            @default(false) // True if this is from Einnahme/Ausgabe
  linkedBuchungId    String?
  linkedBuchung      Buchung?           @relation("BuchungLink", fields: [linkedBuchungId], references: [id], onDelete: SetNull)
  linkedFrom         Buchung[]          @relation("BuchungLink")
  invoice            Invoice?           // Back-relation: Invoice -> Buchung (via buchungId)
  createdAt          DateTime           @default(now())
  updatedAt          DateTime           @updatedAt

  @@index([companyId])
  @@index([date])
  @@index([isBusinessRecord])
  @@map("buchungen")
}

model Service {
  id          String   @id @default(cuid())
  companyId   String
  company     Company  @relation(fields: [companyId], references: [id], onDelete: Cascade)
  name        String
  description String?  @db.Text
  unit        String?
  unitPrice   Decimal  @db.Decimal(10, 2)
  taxRate     Decimal  @db.Decimal(5, 2)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@map("services")
}

model Customer {
  id        String    @id @default(cuid())
  companyId String
  company   Company   @relation(fields: [companyId], references: [id], onDelete: Cascade)
  name      String
  taxId     String?
  address   String
  zip       String
  city      String
  country   String    @default("DE")
  email     String?
  phone     String?
  invoices  Invoice[]
  createdAt DateTime  @default(now())
  updatedAt DateTime  @updatedAt

  @@map("customers")
}

model Invoice {
  id                String        @id @default(cuid())
  number            String?
  companyId         String
  company           Company       @relation(fields: [companyId], references: [id], onDelete: Cascade)
  customerId        String
  customer          Customer      @relation(fields: [customerId], references: [id])
  issueDate         DateTime
  deliveryDate      DateTime?
  dueDate           DateTime
  status            InvoiceStatus @default(DRAFT)
  kleinunternehmer  Boolean       @default(false)
  notes             String?       @db.Text
  items             InvoiceItem[]
  netTotal          Decimal       @db.Decimal(10, 2)
  taxTotal          Decimal       @db.Decimal(10, 2)
  grossTotal        Decimal       @db.Decimal(10, 2)
  buchungId         String?       @unique  // Link to auto-created Buchung when PAID
  buchung           Buchung?      @relation(fields: [buchungId], references: [id], onDelete: SetNull)
  createdAt         DateTime      @default(now())
  updatedAt         DateTime      @updatedAt
  deletedAt         DateTime?

  @@unique([companyId, number])
  @@map("invoices")
}

enum InvoiceStatus {
  DRAFT
  SENT
  PAID
  CANCELLED
  DELETED
}

enum Zahlungsart {
  KASSE
  BANK
}


model Anlagegut {
  id                  String   @id @default(cuid())
  companyId           String
  company             Company  @relation(fields: [companyId], references: [id], onDelete: Cascade)
  bezeichnung         String
  anschaffungsdatum   DateTime
  anschaffungskosten  Decimal  @db.Decimal(10, 2)
  nutzungsdauerJahre  Int
  restwert            Decimal  @db.Decimal(10, 2) @default(0)
  beschreibung        String?  @db.Text
  aktiv               Boolean  @default(true)
  createdAt           DateTime @default(now())
  updatedAt           DateTime @updatedAt

  @@index([companyId])
  @@map("anlagegueter")
}


model InvoiceItem {
  id          String  @id @default(cuid())
  invoiceId   String
  invoice     Invoice @relation(fields: [invoiceId], references: [id], onDelete: Cascade)
  position    Int
  description String  @db.Text
  quantity    Decimal @db.Decimal(10, 3)
  unit        String?
  unitPrice   Decimal @db.Decimal(10, 2)
  taxRate     Decimal @db.Decimal(5, 2)
  netAmount   Decimal @db.Decimal(10, 2)
  taxAmount   Decimal @db.Decimal(10, 2)
  grossAmount Decimal @db.Decimal(10, 2)

  @@map("invoice_items")
}