recipe-app/backend/prisma/schema.prisma

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

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

model User {
  id           Int          @id @default(autoincrement())
  username     String       @unique
  email        String       @unique
  firstName    String?
  lastName     String?
  passwordHash String
  createdAt    DateTime     @default(now())
  updatedAt    DateTime     @updatedAt

  userProducts UserProduct[]
  ownedRecipes Recipe[]      @relation("RecipeOwner")
  sharedRecipes RecipeShare[]
  ownedProducts Product[]
}

model Product {
  id             Int             @id @default(autoincrement())
  name           String
  normalizedName String          @unique
  category       String?
  subcategory    String?
  brand          String?
  canonicalName  String?
  isActive       Boolean         @default(true)
  deletedAt      DateTime?
  createdAt      DateTime        @default(now())
  updatedAt      DateTime        @updatedAt

  inventoryItems    InventoryItem[]
  recipeIngredients RecipeIngredient[]
  pantryItems       PantryItem[]
  receiptAliases    ReceiptAlias[]
  tags              ProductTag[]
  nutrition         Nutrition?
  ownerId           Int?
  owner             User?           @relation(fields: [ownerId], references: [id], onDelete: SetNull)
  userProducts      UserProduct[]
  categoryId        Int?
  categoryRef       Category?       @relation(fields: [categoryId], references: [id], onDelete: SetNull)
}

model Category {
  id       Int        @id @default(autoincrement())
  name     String
  parentId Int?
  parent   Category?  @relation("CategoryTree", fields: [parentId], references: [id], onDelete: SetNull)
  children Category[] @relation("CategoryTree")
  products Product[]

  @@unique([name, parentId])
  @@index([parentId])
}

model UserProduct {
  id             Int      @id @default(autoincrement())
  userId         Int
  productId      Int
  note           String?  @db.Text
  preferredBrand String?
  preferredStore String?
  isPrivate      Boolean  @default(false)
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  user    User    @relation(fields: [userId], references: [id], onDelete: Cascade)
  product Product @relation(fields: [productId], references: [id], onDelete: Cascade)

  @@unique([userId, productId])
  @@index([userId])
  @@index([productId])
}

model InventoryItem {
  id             Int      @id @default(autoincrement())
  productId      Int
  quantity       Decimal  @db.Decimal(10, 2)
  unit           String
  brand		 String?
  receiptName    String?
  location       String?
  priority       Int?
  purchaseDate   DateTime?
  opened         Boolean?
  shelfNote      String?
  suitableFor    String?
  isOnSale       Boolean?
  priceLevel     Int?
  bestBeforeDate DateTime?	
  proteinType    String?
  isLeftover     Boolean?
  comment        String?

  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  product Product @relation(fields: [productId], references: [id], onDelete: Cascade)
  consumptions   InventoryConsumption[]

  @@index([productId])
}

model InventoryConsumption {
  id              Int           @id @default(autoincrement())
  inventoryItem   InventoryItem @relation(fields: [inventoryItemId], references: [id])
  inventoryItemId Int
  amountUsed      Decimal       @db.Decimal(10, 2)
  comment         String?
  createdAt       DateTime      @default(now())
}

model Recipe {
  id           Int                @id @default(autoincrement())
  name         String
  description  String?            @db.Text
  instructions String?            @db.Text
  imageUrl     String?
  servings     Int?
  isPublic     Boolean            @default(false)
  ownerId      Int?
  createdAt    DateTime           @default(now())
  updatedAt    DateTime           @updatedAt

  owner           User?            @relation("RecipeOwner", fields: [ownerId], references: [id], onDelete: SetNull)
  ingredients     RecipeIngredient[]
  mealPlanEntries MealPlanEntry[]
  shares          RecipeShare[]
}

model RecipeShare {
  recipeId Int
  userId   Int
  recipe   Recipe @relation(fields: [recipeId], references: [id], onDelete: Cascade)
  user     User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@id([recipeId, userId])
  @@index([userId])
}

model RecipeIngredient {
  id        Int      @id @default(autoincrement())
  recipe    Recipe   @relation(fields: [recipeId], references: [id])
  recipeId  Int
  product   Product  @relation(fields: [productId], references: [id])
  productId Int
  quantity  Decimal  @db.Decimal(10, 2)
  unit      String
  note      String?

  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

model PantryItem {
  id        Int      @id @default(autoincrement())
  productId Int      @unique
  product   Product  @relation(fields: [productId], references: [id], onDelete: Cascade)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}

model ReceiptAlias {
  id           Int      @id @default(autoincrement())
  receiptName  String   @unique  // normaliserat kvittonamn (lowercase, trim)
  productId    Int
  product      Product  @relation(fields: [productId], references: [id], onDelete: Cascade)
  createdAt    DateTime @default(now())
}

model MealPlanEntry {
  id        Int      @id @default(autoincrement())
  date      DateTime @db.Date
  recipe    Recipe   @relation(fields: [recipeId], references: [id], onDelete: Cascade)
  recipeId  Int
  servings  Int?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  @@unique([date])
  @@index([date])
}

model Tag {
  id       Int          @id @default(autoincrement())
  name     String       @unique
  products ProductTag[]
}

model ProductTag {
  productId Int
  tagId     Int
  product   Product @relation(fields: [productId], references: [id], onDelete: Cascade)
  tag       Tag     @relation(fields: [tagId], references: [id], onDelete: Cascade)

  @@id([productId, tagId])
  @@index([tagId])
}

model Nutrition {
  id            Int     @id @default(autoincrement())
  productId     Int     @unique
  calories      Float?
  protein       Float?
  fat           Float?
  carbohydrates Float?
  salt          Float?
  sugar         Float?
  fiber         Float?
  product       Product @relation(fields: [productId], references: [id], onDelete: Cascade)
}