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

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

enum Role {
  ADMIN
  FRIEND
}

enum LoanStatus {
  AVAILABLE
  LENT_OUT
}

// --- Auth.js models (database session strategy) ---

model User {
  id           String   @id @default(cuid())
  email        String   @unique
  passwordHash String
  name         String?
  role         Role     @default(FRIEND)
  createdAt    DateTime @default(now())
  updatedAt    DateTime @updatedAt

  accounts     Account[]
  sessions     Session[]
  items        Item[]        @relation("ItemOwner")
  libraryItems LibraryItem[] @relation("LibraryOwner")
}

model Account {
  id                String  @id @default(cuid())
  userId            String
  type              String
  provider          String
  providerAccountId String
  refresh_token     String? @db.Text
  access_token      String? @db.Text
  expires_at        Int?
  token_type        String?
  scope             String?
  id_token          String? @db.Text
  session_state     String?

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

  @@unique([provider, providerAccountId])
}

model Session {
  id           String   @id @default(cuid())
  sessionToken String   @unique
  userId       String
  expires      DateTime

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

model VerificationToken {
  identifier String
  token      String   @unique
  expires    DateTime

  @@unique([identifier, token])
}

// --- Domain models ---

model Category {
  id          String   @id @default(cuid())
  key         String   @unique // stable slug used in code/URLs, e.g. "movies"
  label       String
  icon        String? // lucide icon name
  isShared    Boolean  @default(false)
  sortOrder   Int      @default(0)
  fieldSchema Json // array of {key,label,type,required?,options?}
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  items Item[]
}

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

  itemTags ItemTag[]
}

model Item {
  id            String   @id @default(cuid())
  title         String
  coverImageKey String? // S3 object key; public URL built at render time
  categoryId    String
  rating        Int? // 1-5, null = unrated
  description   String? // short plain-text blurb for cards
  notesHtml     String?  @db.Text // sanitized Tiptap HTML
  customFields  Json     @default("{}")
  dateAdded     DateTime @default(now())
  ownerId       String
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  category     Category      @relation(fields: [categoryId], references: [id])
  owner        User          @relation("ItemOwner", fields: [ownerId], references: [id])
  itemTags     ItemTag[]
  libraryItems LibraryItem[]

  @@index([categoryId])
  @@index([rating])
}

model ItemTag {
  itemId String
  tagId  String

  item Item @relation(fields: [itemId], references: [id], onDelete: Cascade)
  tag  Tag  @relation(fields: [tagId], references: [id], onDelete: Cascade)

  @@id([itemId, tagId])
}

model LibraryItem {
  id                 String     @id @default(cuid())
  itemId             String? // optional link to a favorites Item
  standaloneTitle    String? // used when itemId is null
  mediaType          String? // "Book", "DVD", "Blu-ray", "Vinyl", ...
  condition          String?
  loanStatus         LoanStatus @default(AVAILABLE)
  borrowerName       String?
  dateLent           DateTime?
  expectedReturnDate DateTime?
  notes              String?    @db.Text
  ownerId            String
  createdAt          DateTime   @default(now())
  updatedAt          DateTime   @updatedAt

  item  Item? @relation(fields: [itemId], references: [id], onDelete: SetNull)
  owner User  @relation("LibraryOwner", fields: [ownerId], references: [id])

  @@index([loanStatus])
}