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

datasource db {
  provider = "postgresql"
}

enum MessageDirection {
  ELDER_TO_FAMILY
  FAMILY_TO_ELDER
}

enum MessageImportance {
  LOW
  NORMAL
  HIGH
  URGENT
}

enum MessageStatus {
  PENDING
  DELIVERED
  READ
}

enum ConversationRole {
  USER
  ASSISTANT
  TOOL
}

enum UsageEventType {
  APP_OPEN
  SETTINGS_OPENED
  AI_SESSION_STARTED
  AI_SESSION_ENDED
  CAMERA_ENABLED
  CAMERA_DISABLED
  TOOL_CALLED
}

enum ToolCallStatus {
  SUCCESS
  FAILURE
}

enum FamilyRole {
  ADMIN
  CAREGIVER
  CARING
}

enum MembershipStatus {
  ACTIVE
  REMOVED
}

enum InvitationStatus {
  PENDING
  ACCEPTED
  EXPIRED
  REVOKED
}

enum ContentVisibility {
  ELDER_ONLY
  FAMILY_ONLY
  FAMILY_AND_ELDER
}

enum MemoPriority {
  NORMAL
  IMPORTANT
  PINNED
}

enum CareTaskStatus {
  OPEN
  CLAIMED
  COMPLETED
  CANCELLED
}

enum MedicationSource {
  PRESCRIPTION
  PACKAGE_LABEL
  FAMILY_ENTRY
}

enum MedicationDoseStatus {
  SCHEDULED
  REMINDING
  TAKEN
  SNOOZED
  SKIPPED
  MISSED
  NEEDS_FAMILY_CONFIRMATION
}

enum CheckInStatus {
  PENDING
  SAFE
  NEEDS_CONTACT
  DECLINED
  EXPIRED
}

enum AlertLevel {
  RED
  ORANGE
  YELLOW
  BLUE
}

enum AlertStatus {
  OPEN
  ACKNOWLEDGED
  RESOLVED
  DISMISSED
}

model CaregiverAccount {
  id                 String             @id @default(cuid())
  username           String?            @unique
  passwordHash       String?
  nickname           String?
  createdAt          DateTime           @default(now())
  updatedAt          DateTime           @updatedAt
  sessions           CaregiverSession[]
  bindings           DeviceBinding[]
  messages           FamilyMessage[]
  pushSubscriptions  PushSubscription[]
  createdCircles     FamilyCircle[]     @relation("CircleCreator")
  memberships        FamilyMembership[]
  posts              FamilyPost[]
  memos              FamilyMemo[]
  createdTasks       CareTask[]         @relation("TaskCreator")
  assignedTasks      CareTask[]         @relation("TaskAssignee")
  medicationPlans    MedicationPlan[]
  requestedCheckIns  CheckInRequest[]
  claimedAlerts      SafetyAlert[]      @relation("AlertClaimer")
  auditLogs          AuditLog[]
  createdInvitations FamilyInvitation[] @relation("InvitationCreator")
}

model CaregiverSession {
  id           String           @id @default(cuid())
  caregiverId  String
  sessionToken String           @unique
  userAgent    String?
  lastSeenAt   DateTime?
  createdAt    DateTime         @default(now())
  updatedAt    DateTime         @updatedAt
  caregiver    CaregiverAccount @relation(fields: [caregiverId], references: [id], onDelete: Cascade)

  @@index([caregiverId, updatedAt(sort: Desc)])
}

model ElderDevice {
  id                String             @id @default(cuid())
  deviceUuid        String             @unique
  displayName       String?
  appVersion        String?
  lastSeenAt        DateTime?
  createdAt         DateTime           @default(now())
  updatedAt         DateTime           @updatedAt
  bindings          DeviceBinding[]
  messages          FamilyMessage[]
  conversationTurns ConversationTurn[]
  usageEvents       UsageEvent[]
  toolCalls         ToolCallLog[]
  deviceTokenHash   String?
  elderProfile      ElderProfile?
}

model ElderProfile {
  id             String          @id @default(cuid())
  elderDeviceId  String          @unique
  preferredName  String
  timezone       String          @default("Asia/Shanghai")
  createdAt      DateTime        @default(now())
  updatedAt      DateTime        @updatedAt
  elderDevice    ElderDevice     @relation(fields: [elderDeviceId], references: [id], onDelete: Cascade)
  familyCircle   FamilyCircle?
  consentSetting ConsentSetting?
}

model FamilyCircle {
  id              String             @id @default(cuid())
  elderProfileId  String             @unique
  createdById     String
  name            String
  createdAt       DateTime           @default(now())
  updatedAt       DateTime           @updatedAt
  elderProfile    ElderProfile       @relation(fields: [elderProfileId], references: [id], onDelete: Cascade)
  createdBy       CaregiverAccount   @relation("CircleCreator", fields: [createdById], references: [id], onDelete: Restrict)
  memberships     FamilyMembership[]
  posts           FamilyPost[]
  memos           FamilyMemo[]
  tasks           CareTask[]
  medicationPlans MedicationPlan[]
  checkIns        CheckInRequest[]
  safetySignals   SafetySignal[]
  alerts          SafetyAlert[]
  memories        FamilyMemory[]
  auditLogs       AuditLog[]
  invitations     FamilyInvitation[]
}

model FamilyInvitation {
  id             String           @id @default(cuid())
  familyCircleId String
  createdById    String
  tokenHash      String           @unique
  role           FamilyRole       @default(CARING)
  relationLabel  String?
  status         InvitationStatus @default(PENDING)
  expiresAt      DateTime
  acceptedAt     DateTime?
  createdAt      DateTime         @default(now())
  familyCircle   FamilyCircle     @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  createdBy      CaregiverAccount @relation("InvitationCreator", fields: [createdById], references: [id], onDelete: Cascade)

  @@index([familyCircleId, status, expiresAt])
}

model FamilyMembership {
  id             String           @id @default(cuid())
  familyCircleId String
  caregiverId    String
  role           FamilyRole       @default(CARING)
  relationLabel  String?
  status         MembershipStatus @default(ACTIVE)
  emergencyPush  Boolean          @default(true)
  routinePush    Boolean          @default(true)
  dutyOrder      Int?
  createdAt      DateTime         @default(now())
  updatedAt      DateTime         @updatedAt
  familyCircle   FamilyCircle     @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  caregiver      CaregiverAccount @relation(fields: [caregiverId], references: [id], onDelete: Cascade)

  @@unique([familyCircleId, caregiverId])
  @@index([caregiverId, status])
}

model FamilyPost {
  id             String            @id @default(cuid())
  familyCircleId String
  authorId       String?
  content        String
  visibility     ContentVisibility @default(FAMILY_AND_ELDER)
  elderAuthored  Boolean           @default(false)
  pinned         Boolean           @default(false)
  deliveredAt    DateTime?
  readAt         DateTime?
  createdAt      DateTime          @default(now())
  familyCircle   FamilyCircle      @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  author         CaregiverAccount? @relation(fields: [authorId], references: [id], onDelete: SetNull)

  @@index([familyCircleId, createdAt(sort: Desc)])
}

model FamilyMemo {
  id             String            @id @default(cuid())
  familyCircleId String
  authorId       String
  title          String
  content        String
  priority       MemoPriority      @default(NORMAL)
  visibility     ContentVisibility @default(FAMILY_AND_ELDER)
  createdAt      DateTime          @default(now())
  updatedAt      DateTime          @updatedAt
  familyCircle   FamilyCircle      @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  author         CaregiverAccount  @relation(fields: [authorId], references: [id], onDelete: Restrict)

  @@index([familyCircleId, priority, updatedAt(sort: Desc)])
}

model CareTask {
  id             String            @id @default(cuid())
  familyCircleId String
  createdById    String
  assignedToId   String?
  title          String
  description    String?
  dueAt          DateTime?
  status         CareTaskStatus    @default(OPEN)
  completedAt    DateTime?
  completionNote String?
  createdAt      DateTime          @default(now())
  updatedAt      DateTime          @updatedAt
  familyCircle   FamilyCircle      @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  createdBy      CaregiverAccount  @relation("TaskCreator", fields: [createdById], references: [id], onDelete: Restrict)
  assignedTo     CaregiverAccount? @relation("TaskAssignee", fields: [assignedToId], references: [id], onDelete: SetNull)

  @@index([familyCircleId, status, dueAt])
}

model MedicationPlan {
  id             String           @id @default(cuid())
  familyCircleId String
  createdById    String
  name           String
  dosage         String
  instructions   String?
  timesJson      String
  source         MedicationSource
  startDate      DateTime
  endDate        DateTime?
  stockCount     Int?
  active         Boolean          @default(true)
  pausedReason   String?
  createdAt      DateTime         @default(now())
  updatedAt      DateTime         @updatedAt
  familyCircle   FamilyCircle     @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  createdBy      CaregiverAccount @relation(fields: [createdById], references: [id], onDelete: Restrict)
  doses          MedicationDose[]

  @@index([familyCircleId, active])
}

model MedicationDose {
  id               String               @id @default(cuid())
  medicationPlanId String
  scheduledFor     DateTime
  status           MedicationDoseStatus @default(SCHEDULED)
  respondedAt      DateTime?
  snoozedUntil     DateTime?
  note             String?
  createdAt        DateTime             @default(now())
  updatedAt        DateTime             @updatedAt
  medicationPlan   MedicationPlan       @relation(fields: [medicationPlanId], references: [id], onDelete: Cascade)

  @@unique([medicationPlanId, scheduledFor])
  @@index([scheduledFor, status])
}

model CheckInRequest {
  id             String           @id @default(cuid())
  familyCircleId String
  requestedById  String
  prompt         String?
  dueAt          DateTime?
  status         CheckInStatus    @default(PENDING)
  responseText   String?
  respondedAt    DateTime?
  createdAt      DateTime         @default(now())
  updatedAt      DateTime         @updatedAt
  familyCircle   FamilyCircle     @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  requestedBy    CaregiverAccount @relation(fields: [requestedById], references: [id], onDelete: Restrict)

  @@index([familyCircleId, status, createdAt(sort: Desc)])
}

model SafetySignal {
  id             String       @id @default(cuid())
  familyCircleId String
  category       String
  summary        String
  confidence     Float?
  contextText    String?
  createdAt      DateTime     @default(now())
  familyCircle   FamilyCircle @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  alert          SafetyAlert?

  @@index([familyCircleId, category, createdAt(sort: Desc)])
}

model SafetyAlert {
  id             String            @id @default(cuid())
  familyCircleId String
  safetySignalId String            @unique
  claimedById    String?
  level          AlertLevel
  status         AlertStatus       @default(OPEN)
  title          String
  summary        String
  resolutionNote String?
  claimedAt      DateTime?
  resolvedAt     DateTime?
  createdAt      DateTime          @default(now())
  updatedAt      DateTime          @updatedAt
  familyCircle   FamilyCircle      @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  safetySignal   SafetySignal      @relation(fields: [safetySignalId], references: [id], onDelete: Cascade)
  claimedBy      CaregiverAccount? @relation("AlertClaimer", fields: [claimedById], references: [id], onDelete: SetNull)

  @@index([familyCircleId, status, createdAt(sort: Desc)])
}

model FamilyMemory {
  id             String       @id @default(cuid())
  familyCircleId String
  title          String
  story          String
  mediaUrl       String?
  occurredAt     DateTime?
  createdAt      DateTime     @default(now())
  familyCircle   FamilyCircle @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
}

model ConsentSetting {
  id               String       @id @default(cuid())
  elderProfileId   String       @unique
  shareTranscripts Boolean      @default(true)
  shareRawAudio    Boolean      @default(false)
  updatedAt        DateTime     @updatedAt
  elderProfile     ElderProfile @relation(fields: [elderProfileId], references: [id], onDelete: Cascade)
}

model AuditLog {
  id             String            @id @default(cuid())
  familyCircleId String
  actorId        String?
  action         String
  entityType     String
  entityId       String?
  detailJson     String?
  createdAt      DateTime          @default(now())
  familyCircle   FamilyCircle      @relation(fields: [familyCircleId], references: [id], onDelete: Cascade)
  actor          CaregiverAccount? @relation(fields: [actorId], references: [id], onDelete: SetNull)

  @@index([familyCircleId, createdAt(sort: Desc)])
}

model DeviceBinding {
  id            String           @id @default(cuid())
  caregiverId   String
  elderDeviceId String
  alias         String?
  createdAt     DateTime         @default(now())
  caregiver     CaregiverAccount @relation(fields: [caregiverId], references: [id], onDelete: Cascade)
  elderDevice   ElderDevice      @relation(fields: [elderDeviceId], references: [id], onDelete: Cascade)

  @@unique([caregiverId, elderDeviceId])
  @@index([elderDeviceId, createdAt])
}

model FamilyMessage {
  id                String            @id @default(cuid())
  publicId          Int               @unique @default(autoincrement())
  elderDeviceId     String
  caregiverId       String?
  direction         MessageDirection
  content           String
  recipientRelation String?
  importance        MessageImportance @default(NORMAL)
  status            MessageStatus     @default(PENDING)
  source            String?
  createdAt         DateTime          @default(now())
  deliveredAt       DateTime?
  readAt            DateTime?
  elderDevice       ElderDevice       @relation(fields: [elderDeviceId], references: [id], onDelete: Cascade)
  caregiver         CaregiverAccount? @relation(fields: [caregiverId], references: [id], onDelete: SetNull)

  @@index([elderDeviceId, createdAt(sort: Desc)])
  @@index([direction, status, createdAt(sort: Desc)])
}

model PushSubscription {
  id             String           @id @default(cuid())
  caregiverId    String
  endpoint       String           @unique
  p256dh         String
  auth           String
  expirationTime DateTime?
  userAgent      String?
  createdAt      DateTime         @default(now())
  updatedAt      DateTime         @updatedAt
  caregiver      CaregiverAccount @relation(fields: [caregiverId], references: [id], onDelete: Cascade)

  @@index([caregiverId, updatedAt(sort: Desc)])
}

model ConversationTurn {
  id            String           @id @default(cuid())
  elderDeviceId String
  sessionId     String?
  role          ConversationRole
  content       String
  metaJson      String?
  createdAt     DateTime         @default(now())
  elderDevice   ElderDevice      @relation(fields: [elderDeviceId], references: [id], onDelete: Cascade)

  @@index([elderDeviceId, createdAt(sort: Desc)])
  @@index([sessionId, createdAt])
}

model UsageEvent {
  id            String         @id @default(cuid())
  elderDeviceId String
  eventType     UsageEventType
  detailJson    String?
  createdAt     DateTime       @default(now())
  elderDevice   ElderDevice    @relation(fields: [elderDeviceId], references: [id], onDelete: Cascade)

  @@index([elderDeviceId, createdAt(sort: Desc)])
  @@index([eventType, createdAt(sort: Desc)])
}

model ToolCallLog {
  id            String         @id @default(cuid())
  elderDeviceId String
  sessionId     String?
  callId        String?
  toolName      String
  argumentsJson String
  outputText    String?
  status        ToolCallStatus
  createdAt     DateTime       @default(now())
  elderDevice   ElderDevice    @relation(fields: [elderDeviceId], references: [id], onDelete: Cascade)

  @@index([elderDeviceId, createdAt(sort: Desc)])
  @@index([toolName, createdAt(sort: Desc)])
}