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

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

// ─── Users ──────────────────────────────────────────────────────────

model User {
  id        String   @id @default(cuid())
  did       String   @unique // EncryptID DID
  username  String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  notebooks NotebookCollaborator[]
  notes     Note[]
  files     File[]
  sharedByMe SharedAccess[] @relation("SharedBy")
}

// ─── Notebooks ──────────────────────────────────────────────────────

model Notebook {
  id            String   @id @default(cuid())
  title         String
  slug          String   @unique
  description   String?  @db.Text
  coverColor    String   @default("#f59e0b")
  canvasSlug    String?
  canvasShapeId String?
  isPublic      Boolean  @default(false)
  sortOrder     Int      @default(0)
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  collaborators NotebookCollaborator[]
  notes         Note[]
  sharedAccess  SharedAccess[]

  @@index([slug])
}

enum CollaboratorRole {
  OWNER
  EDITOR
  VIEWER
}

model NotebookCollaborator {
  id         String           @id @default(cuid())
  userId     String
  user       User             @relation(fields: [userId], references: [id], onDelete: Cascade)
  notebookId String
  notebook   Notebook         @relation(fields: [notebookId], references: [id], onDelete: Cascade)
  role       CollaboratorRole @default(VIEWER)
  joinedAt   DateTime         @default(now())

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

// ─── Notes ──────────────────────────────────────────────────────────

model Note {
  id            String   @id @default(cuid())
  notebookId    String?
  notebook      Notebook? @relation(fields: [notebookId], references: [id], onDelete: SetNull)
  authorId      String?
  author        User?    @relation(fields: [authorId], references: [id], onDelete: SetNull)
  title         String
  content       String   @db.Text
  contentPlain  String?  @db.Text
  type          NoteType @default(NOTE)
  url           String?
  archiveUrl    String?
  language      String?
  mimeType      String?
  fileUrl       String?
  fileSize      Int?
  duration      Int?
  isPinned      Boolean  @default(false)
  canvasShapeId String?
  sortOrder     Int      @default(0)
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt

  // ─── Memory Card fields ─────────────────────────────────────────
  parentId      String?
  parent        Note?    @relation("NoteTree", fields: [parentId], references: [id], onDelete: SetNull)
  children      Note[]   @relation("NoteTree")
  bodyJson      Json?                          // TipTap JSON (canonical format)
  bodyMarkdown  String?  @db.Text              // portable markdown for search + Logseq
  bodyFormat    String   @default("html")      // "html" | "markdown" | "blocks"
  cardType      String   @default("note")      // note|link|file|task|person|idea|reference
  summary       String?                        // auto or manual
  visibility    String   @default("private")   // private|space|public
  position      Float?                         // fractional ordering
  properties    Json     @default("{}")         // Logseq-compatible key-value
  archivedAt    DateTime?                      // soft-delete

  tags        NoteTag[]
  attachments CardAttachment[]

  @@index([notebookId])
  @@index([authorId])
  @@index([type])
  @@index([isPinned])
  @@index([parentId])
  @@index([cardType])
  @@index([archivedAt])
  @@index([position])
}

enum NoteType {
  NOTE
  CLIP
  BOOKMARK
  CODE
  IMAGE
  FILE
  AUDIO
}

// ─── Files & Attachments ────────────────────────────────────────────

model File {
  id         String   @id @default(cuid())
  storageKey String   @unique // unique filename on disk
  filename   String              // original filename
  mimeType   String
  sizeBytes  Int
  checksum   String?
  authorId   String?
  author     User?    @relation(fields: [authorId], references: [id], onDelete: SetNull)
  createdAt  DateTime @default(now())

  attachments CardAttachment[]
}

model CardAttachment {
  id        String   @id @default(cuid())
  noteId    String
  note      Note     @relation(fields: [noteId], references: [id], onDelete: Cascade)
  fileId    String
  file      File     @relation(fields: [fileId], references: [id], onDelete: Cascade)
  role      String   @default("supporting") // "primary"|"preview"|"supporting"
  caption   String?
  position  Float    @default(0)
  createdAt DateTime @default(now())

  @@unique([noteId, fileId])
  @@index([noteId])
  @@index([fileId])
}

// ─── Tags ───────────────────────────────────────────────────────────

model Tag {
  id        String   @id @default(cuid())
  name      String
  color     String?  @default("#6b7280")
  spaceId   String   @default("")  // "" = global, otherwise space-scoped
  schema    Json?
  createdAt DateTime @default(now())

  notes NoteTag[]

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

model NoteTag {
  id     String @id @default(cuid())
  noteId String
  note   Note   @relation(fields: [noteId], references: [id], onDelete: Cascade)
  tagId  String
  tag    Tag    @relation(fields: [tagId], references: [id], onDelete: Cascade)

  @@unique([noteId, tagId])
  @@index([tagId])
  @@index([noteId])
}

// ─── Shared Access ──────────────────────────────────────────────────

model SharedAccess {
  id         String           @id @default(cuid())
  notebookId String
  notebook   Notebook         @relation(fields: [notebookId], references: [id], onDelete: Cascade)
  sharedById String
  sharedBy   User             @relation("SharedBy", fields: [sharedById], references: [id], onDelete: Cascade)
  targetDid  String
  role       CollaboratorRole @default(VIEWER)
  createdAt  DateTime         @default(now())

  @@unique([notebookId, targetDid])
  @@index([targetDid])
}