// Mosaic Stack Database Schema
// PostgreSQL 17 with pgvector extension

generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["postgresqlExtensions"]
}

datasource db {
  provider   = "postgresql"
  url        = env("DATABASE_URL")
  extensions = [pgvector(map: "vector"), uuid_ossp(map: "uuid-ossp")]
}

// ============================================
// ENUMS
// ============================================

enum TaskStatus {
  NOT_STARTED
  IN_PROGRESS
  PAUSED
  COMPLETED
  ARCHIVED
}

enum TaskPriority {
  LOW
  MEDIUM
  HIGH
}

enum ProjectStatus {
  PLANNING
  ACTIVE
  PAUSED
  COMPLETED
  ARCHIVED
}

enum WorkspaceMemberRole {
  OWNER
  ADMIN
  MEMBER
  GUEST
}

enum ActivityAction {
  CREATED
  UPDATED
  DELETED
  COMPLETED
  ASSIGNED
  COMMENTED
}

enum EntityType {
  TASK
  EVENT
  PROJECT
  WORKSPACE
  USER
}

// ============================================
// MODELS
// ============================================

model User {
  id             String   @id @default(uuid()) @db.Uuid
  email          String   @unique
  name           String
  authProviderId String?  @unique @map("auth_provider_id")
  preferences    Json     @default("{}")
  createdAt      DateTime @default(now()) @map("created_at") @db.Timestamptz
  updatedAt      DateTime @updatedAt @map("updated_at") @db.Timestamptz

  // Relations
  ownedWorkspaces      Workspace[]        @relation("WorkspaceOwner")
  workspaceMemberships WorkspaceMember[]
  assignedTasks        Task[]             @relation("TaskAssignee")
  createdTasks         Task[]             @relation("TaskCreator")
  createdEvents        Event[]            @relation("EventCreator")
  createdProjects      Project[]          @relation("ProjectCreator")
  activityLogs         ActivityLog[]

  @@map("users")
}

model Workspace {
  id        String   @id @default(uuid()) @db.Uuid
  name      String
  ownerId   String   @map("owner_id") @db.Uuid
  settings  Json     @default("{}")
  createdAt DateTime @default(now()) @map("created_at") @db.Timestamptz
  updatedAt DateTime @updatedAt @map("updated_at") @db.Timestamptz

  // Relations
  owner            User              @relation("WorkspaceOwner", fields: [ownerId], references: [id], onDelete: Cascade)
  members          WorkspaceMember[]
  tasks            Task[]
  events           Event[]
  projects         Project[]
  activityLogs     ActivityLog[]
  memoryEmbeddings MemoryEmbedding[]

  @@index([ownerId])
  @@map("workspaces")
}

model WorkspaceMember {
  workspaceId String              @map("workspace_id") @db.Uuid
  userId      String              @map("user_id") @db.Uuid
  role        WorkspaceMemberRole @default(MEMBER)
  joinedAt    DateTime            @default(now()) @map("joined_at") @db.Timestamptz

  // Relations
  workspace Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@id([workspaceId, userId])
  @@index([userId])
  @@map("workspace_members")
}

model Task {
  id          String       @id @default(uuid()) @db.Uuid
  workspaceId String       @map("workspace_id") @db.Uuid
  title       String
  description String?      @db.Text
  status      TaskStatus   @default(NOT_STARTED)
  priority    TaskPriority @default(MEDIUM)
  dueDate     DateTime?    @map("due_date") @db.Timestamptz
  assigneeId  String?      @map("assignee_id") @db.Uuid
  creatorId   String       @map("creator_id") @db.Uuid
  projectId   String?      @map("project_id") @db.Uuid
  parentId    String?      @map("parent_id") @db.Uuid
  sortOrder   Int          @default(0) @map("sort_order")
  metadata    Json         @default("{}")
  createdAt   DateTime     @default(now()) @map("created_at") @db.Timestamptz
  updatedAt   DateTime     @updatedAt @map("updated_at") @db.Timestamptz
  completedAt DateTime?    @map("completed_at") @db.Timestamptz

  // Relations
  workspace Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
  assignee  User?     @relation("TaskAssignee", fields: [assigneeId], references: [id], onDelete: SetNull)
  creator   User      @relation("TaskCreator", fields: [creatorId], references: [id], onDelete: Cascade)
  project   Project?  @relation(fields: [projectId], references: [id], onDelete: SetNull)
  parent    Task?     @relation("TaskSubtasks", fields: [parentId], references: [id], onDelete: Cascade)
  subtasks  Task[]    @relation("TaskSubtasks")

  @@index([workspaceId])
  @@index([workspaceId, status])
  @@index([workspaceId, dueDate])
  @@index([assigneeId])
  @@index([projectId])
  @@index([parentId])
  @@map("tasks")
}

model Event {
  id          String    @id @default(uuid()) @db.Uuid
  workspaceId String    @map("workspace_id") @db.Uuid
  title       String
  description String?   @db.Text
  startTime   DateTime  @map("start_time") @db.Timestamptz
  endTime     DateTime? @map("end_time") @db.Timestamptz
  allDay      Boolean   @default(false) @map("all_day")
  location    String?
  recurrence  Json?
  creatorId   String    @map("creator_id") @db.Uuid
  projectId   String?   @map("project_id") @db.Uuid
  metadata    Json      @default("{}")
  createdAt   DateTime  @default(now()) @map("created_at") @db.Timestamptz
  updatedAt   DateTime  @updatedAt @map("updated_at") @db.Timestamptz

  // Relations
  workspace Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
  creator   User      @relation("EventCreator", fields: [creatorId], references: [id], onDelete: Cascade)
  project   Project?  @relation(fields: [projectId], references: [id], onDelete: SetNull)

  @@index([workspaceId])
  @@index([workspaceId, startTime])
  @@index([creatorId])
  @@index([projectId])
  @@map("events")
}

model Project {
  id          String        @id @default(uuid()) @db.Uuid
  workspaceId String        @map("workspace_id") @db.Uuid
  name        String
  description String?       @db.Text
  status      ProjectStatus @default(PLANNING)
  startDate   DateTime?     @map("start_date") @db.Date
  endDate     DateTime?     @map("end_date") @db.Date
  creatorId   String        @map("creator_id") @db.Uuid
  color       String?
  metadata    Json          @default("{}")
  createdAt   DateTime      @default(now()) @map("created_at") @db.Timestamptz
  updatedAt   DateTime      @updatedAt @map("updated_at") @db.Timestamptz

  // Relations
  workspace Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
  creator   User      @relation("ProjectCreator", fields: [creatorId], references: [id], onDelete: Cascade)
  tasks     Task[]
  events    Event[]

  @@index([workspaceId])
  @@index([workspaceId, status])
  @@index([creatorId])
  @@map("projects")
}

model ActivityLog {
  id          String         @id @default(uuid()) @db.Uuid
  workspaceId String         @map("workspace_id") @db.Uuid
  userId      String         @map("user_id") @db.Uuid
  action      ActivityAction
  entityType  EntityType     @map("entity_type")
  entityId    String         @map("entity_id") @db.Uuid
  details     Json           @default("{}")
  createdAt   DateTime       @default(now()) @map("created_at") @db.Timestamptz

  // Relations
  workspace Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)
  user      User      @relation(fields: [userId], references: [id], onDelete: Cascade)

  @@index([workspaceId])
  @@index([workspaceId, createdAt])
  @@index([entityType, entityId])
  @@index([userId])
  @@map("activity_logs")
}

model MemoryEmbedding {
  id          String                       @id @default(uuid()) @db.Uuid
  workspaceId String                       @map("workspace_id") @db.Uuid
  content     String                       @db.Text
  // Note: vector dimension (1536) must match EMBEDDING_DIMENSION constant in @mosaic/shared
  embedding   Unsupported("vector(1536)")?
  entityType  EntityType?                  @map("entity_type")
  entityId    String?                      @map("entity_id") @db.Uuid
  metadata    Json                         @default("{}")
  createdAt   DateTime                     @default(now()) @map("created_at") @db.Timestamptz
  updatedAt   DateTime                     @updatedAt @map("updated_at") @db.Timestamptz

  // Relations
  workspace Workspace @relation(fields: [workspaceId], references: [id], onDelete: Cascade)

  @@index([workspaceId])
  @@map("memory_embeddings")
}