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

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

// ─── Multi-Tenancy ────────────────────────────────────────────

model Tenant {
  id        String   @id @default(uuid()) @db.Uuid
  name      String
  slug      String   @unique
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

  hostnames      TenantHostname[]
  users          User[]
  boards         Board[]
  tags           Tag[]
  categories     Category[]
  boardTemplates BoardTemplate[]

  @@map("tenants")
}

model TenantHostname {
  id        String   @id @default(uuid()) @db.Uuid
  hostname  String   @unique
  tenantId  String   @map("tenant_id") @db.Uuid
  isPrimary Boolean  @default(false) @map("is_primary")
  createdAt DateTime @default(now()) @map("created_at")

  tenant Tenant @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@map("tenant_hostnames")
}

// ─── Users & Auth ─────────────────────────────────────────────

enum GlobalRole {
  SITE_ADMIN
  USER
}

enum TenantRole {
  ADMIN
  MEMBER
}

model User {
  id           String     @id @default(uuid()) @db.Uuid
  tenantId     String     @map("tenant_id") @db.Uuid
  email        String
  name         String
  passwordHash String     @map("password_hash")
  globalRole   GlobalRole @default(USER) @map("global_role")
  tenantRole   TenantRole @default(MEMBER) @map("tenant_role")
  avatarUrl    String?    @map("avatar_url")
  createdAt    DateTime   @default(now()) @map("created_at")
  updatedAt    DateTime   @updatedAt @map("updated_at")

  tenant       Tenant         @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  sessions     Session[]
  boardMembers BoardMember[]
  cardAssignees CardAssignee[]
  comments     Comment[]
  activities   Activity[]
  notifications Notification[]

  @@unique([tenantId, email])
  @@map("users")
}

model Session {
  id        String   @id @default(uuid()) @db.Uuid
  userId    String   @map("user_id") @db.Uuid
  expiresAt DateTime @map("expires_at")
  createdAt DateTime @default(now()) @map("created_at")

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

  @@map("sessions")
}

// ─── Boards ───────────────────────────────────────────────────

enum BoardVisibility {
  PUBLIC
  PRIVATE
}

enum BoardMemberRole {
  OWNER
  EDITOR
  VIEWER
}

model Board {
  id          String          @id @default(uuid()) @db.Uuid
  tenantId    String          @map("tenant_id") @db.Uuid
  title       String
  description String?
  visibility  BoardVisibility @default(PRIVATE)
  background  String?
  categoryId  String?         @map("category_id") @db.Uuid
  archived    Boolean         @default(false)
  createdAt   DateTime        @default(now()) @map("created_at")
  updatedAt   DateTime        @updatedAt @map("updated_at")

  tenant     Tenant        @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  category   Category?     @relation(fields: [categoryId], references: [id], onDelete: SetNull)
  columns    Column[]
  members    BoardMember[]
  activities Activity[]

  @@map("boards")
}

model BoardMember {
  id      String          @id @default(uuid()) @db.Uuid
  boardId String          @map("board_id") @db.Uuid
  userId  String          @map("user_id") @db.Uuid
  role    BoardMemberRole @default(EDITOR)

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

  @@unique([boardId, userId])
  @@map("board_members")
}

// ─── Columns ──────────────────────────────────────────────────

model Column {
  id       String @id @default(uuid()) @db.Uuid
  boardId  String @map("board_id") @db.Uuid
  title    String
  position String // Fractional index (lexicographic)

  board Board  @relation(fields: [boardId], references: [id], onDelete: Cascade)
  cards Card[]

  @@map("columns")
}

// ─── Cards ────────────────────────────────────────────────────

model Card {
  id          String    @id @default(uuid()) @db.Uuid
  columnId    String    @map("column_id") @db.Uuid
  title       String
  description String?
  position    String    // Fractional index (lexicographic)
  dueDate     DateTime? @map("due_date")
  archived    Boolean   @default(false)
  createdAt   DateTime  @default(now()) @map("created_at")
  updatedAt   DateTime  @updatedAt @map("updated_at")

  column     Column         @relation(fields: [columnId], references: [id], onDelete: Cascade)
  assignees  CardAssignee[]
  labels     CardLabel[]
  checklists Checklist[]
  comments   Comment[]
  attachments Attachment[]
  activities  Activity[]

  @@map("cards")
}

model CardAssignee {
  id     String @id @default(uuid()) @db.Uuid
  cardId String @map("card_id") @db.Uuid
  userId String @map("user_id") @db.Uuid

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

  @@unique([cardId, userId])
  @@map("card_assignees")
}

// ─── Tags & Labels ────────────────────────────────────────────

model Tag {
  id       String @id @default(uuid()) @db.Uuid
  tenantId String @map("tenant_id") @db.Uuid
  name     String
  color    String // hex color

  tenant Tenant      @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  cards  CardLabel[]

  @@unique([tenantId, name])
  @@map("tags")
}

model CardLabel {
  id    String @id @default(uuid()) @db.Uuid
  cardId String @map("card_id") @db.Uuid
  tagId  String @map("tag_id") @db.Uuid

  card Card @relation(fields: [cardId], references: [id], onDelete: Cascade)
  tag  Tag  @relation(fields: [tagId], references: [id], onDelete: Cascade)

  @@unique([cardId, tagId])
  @@map("card_labels")
}

// ─── Categories ───────────────────────────────────────────────

model Category {
  id       String @id @default(uuid()) @db.Uuid
  tenantId String @map("tenant_id") @db.Uuid
  name     String

  tenant Tenant  @relation(fields: [tenantId], references: [id], onDelete: Cascade)
  boards Board[]

  @@unique([tenantId, name])
  @@map("categories")
}

// ─── Checklists ───────────────────────────────────────────────

model Checklist {
  id       String @id @default(uuid()) @db.Uuid
  cardId   String @map("card_id") @db.Uuid
  title    String
  position String

  card  Card            @relation(fields: [cardId], references: [id], onDelete: Cascade)
  items ChecklistItem[]

  @@map("checklists")
}

model ChecklistItem {
  id          String  @id @default(uuid()) @db.Uuid
  checklistId String  @map("checklist_id") @db.Uuid
  title       String
  completed   Boolean @default(false)
  position    String

  checklist Checklist @relation(fields: [checklistId], references: [id], onDelete: Cascade)

  @@map("checklist_items")
}

// ─── Comments ─────────────────────────────────────────────────

model Comment {
  id        String   @id @default(uuid()) @db.Uuid
  cardId    String   @map("card_id") @db.Uuid
  userId    String   @map("user_id") @db.Uuid
  content   String
  createdAt DateTime @default(now()) @map("created_at")
  updatedAt DateTime @updatedAt @map("updated_at")

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

  @@map("comments")
}

// ─── Attachments ──────────────────────────────────────────────

model Attachment {
  id        String   @id @default(uuid()) @db.Uuid
  cardId    String   @map("card_id") @db.Uuid
  filename  String
  filepath  String
  mimetype  String
  size      Int
  createdAt DateTime @default(now()) @map("created_at")

  card Card @relation(fields: [cardId], references: [id], onDelete: Cascade)

  @@map("attachments")
}

// ─── Activity Log ─────────────────────────────────────────────

model Activity {
  id        String   @id @default(uuid()) @db.Uuid
  boardId   String   @map("board_id") @db.Uuid
  cardId    String?  @map("card_id") @db.Uuid
  userId    String   @map("user_id") @db.Uuid
  action    String   // e.g. "card.created", "card.moved", "comment.added"
  metadata  Json?    // additional context
  createdAt DateTime @default(now()) @map("created_at")

  board Board  @relation(fields: [boardId], references: [id], onDelete: Cascade)
  card  Card?  @relation(fields: [cardId], references: [id], onDelete: SetNull)
  user  User   @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@map("activities")
}

// ─── Notifications ────────────────────────────────────────────

model Notification {
  id        String   @id @default(uuid()) @db.Uuid
  userId    String   @map("user_id") @db.Uuid
  type      String   // e.g. "assigned", "mentioned", "due_soon"
  title     String
  body      String?
  link      String?
  read      Boolean  @default(false)
  createdAt DateTime @default(now()) @map("created_at")

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

  @@map("notifications")
}

// ─── Board Templates ──────────────────────────────────────────

model BoardTemplate {
  id       String @id @default(uuid()) @db.Uuid
  tenantId String? @map("tenant_id") @db.Uuid // null = system template
  name     String
  description String?
  template Json   // JSON structure with columns/cards

  tenant Tenant? @relation(fields: [tenantId], references: [id], onDelete: Cascade)

  @@map("board_templates")
}