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

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

enum MovementKind {
  Receipt
  Issue
  Transfer
  Adjustment
}

model ProductType {
  id        String    @id @default(uuid())
  name      String    @unique
  products  Product[]
  createdAt DateTime  @default(now())
  updatedAt DateTime  @updatedAt

  @@map("product_types")
}

model Product {
  id            String              @id @default(uuid())
  name          String
  productType   ProductType         @relation(fields: [productTypeId], references: [id])
  productTypeId String
  parent        Product?            @relation("ProductHierarchy", fields: [parentId], references: [id])
  parentId      String?
  children      Product[]           @relation("ProductHierarchy")
  stockStatus   StockStatus?
  lines         StockMovementLine[]
  createdAt     DateTime            @default(now())
  updatedAt     DateTime            @updatedAt

  @@map("products")
}

model StockStatus {
  product   Product  @relation(fields: [productId], references: [id])
  productId String   @id @unique
  quantity  Decimal  @default(0)
  inStock   Boolean  @default(false)
  updatedAt DateTime @default(now()) @updatedAt

  @@map("stock_statuses")
}

model StockMovement {
  id           String              @id @default(uuid())
  documentDate DateTime            @db.Date
  kind         MovementKind
  lines        StockMovementLine[]
  comment      String?
  createdAt    DateTime            @default(now())
  updatedAt    DateTime            @updatedAt

  @@map("stock_movements")
}

model StockMovementLine {
  id         String        @id @default(uuid())
  product    Product       @relation(fields: [productId], references: [id])
  productId  String
  quantity   Decimal
  inStock    Boolean
  movement   StockMovement @relation(fields: [movementId], references: [id])
  movementId String
  createdAt  DateTime      @default(now())
  updatedAt  DateTime      @updatedAt

  @@unique([movementId, productId])
  @@map("stock_movement_lines")
}