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

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

enum RoleEnum {
  OWNER
  MANAGER
  GROWER
  STAFF
}

enum RoomType {
  VEG
  FLOWER
  DRY
  CURE
  MOTHER
  CLONE
  FACILITY
}

enum TaskStatus {
  PENDING
  IN_PROGRESS
  COMPLETED
  BLOCKED
}

// Daily Walkthrough Enums
enum WalkthroughStatus {
  IN_PROGRESS
  COMPLETED
  INCOMPLETE
}

enum TankType {
  VEG
  FLOWER
}

enum TankStatus {
  OK
  LOW
  CRITICAL
}

enum HealthStatus {
  GOOD
  FAIR
  NEEDS_ATTENTION
}

enum AccessStatus {
  OK
  ISSUES
}

model User {
  id            String     @id @default(uuid())
  email         String     @unique
  passwordHash  String
  name          String?
  role          RoleEnum   @default(STAFF) // Kept for legacy/fallback, but relying on roleId usually
  
  roleId        String?
  userRole      Role?      @relation(fields: [roleId], references: [id])
  
  rate          Decimal?   @map("hourly_rate")
  createdAt     DateTime   @default(now())
  updatedAt     DateTime   @updatedAt

  tasks         Task[]
  timeLogs      TimeLog[]
  walkthroughs  DailyWalkthrough[]
  touchPoints   PlantTouchPoint[]
  
  // Phase 3 Relations
  weightLogs    WeightLog[]
  batchNotes    BatchNote[]
  batchPhotos   BatchPhoto[]

  // Phase 8: Visitor Management
  visitorEscorts    VisitorLog[] @relation("VisitorEscort")
  visitorApprovals  VisitorLog[] @relation("VisitorApprover")

  // Phase 9: Messaging
  announcements      Announcement[]    @relation("AnnouncementCreator")
  announcementAcks   AnnouncementAck[] @relation("AnnouncementAcker")
  shiftNotes         ShiftNote[]       @relation("ShiftNoteCreator")

  // Phase 10: Compliance
  documentsCreated   Document[]        @relation("DocumentCreator")
  documentsApproved  Document[]        @relation("DocumentApprover")

  @@map("users")
}

model Role {
  id          String   @id @default(uuid())
  name        String   @unique
  description String?
  permissions Json     // Store permissions as JSON: { users: { read: true, write: true }, ... }
  isSystem    Boolean  @default(false) // System roles cannot be deleted
  
  users       User[]
  
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@map("roles")
}

model Room {
  id        String    @id @default(uuid())
  name      String
  type      RoomType
  sqft      Float?
  width     Float?
  length    Float?
  createdAt DateTime  @default(now())
  updatedAt DateTime  @updatedAt

  capacity    Int?     // plant count or sq ft
  status      RoomStatus @default(ACTIVE)
  targetTemp  Float?
  targetHumidity Float?
  targetVPD   Float?

  batches   Batch[]
  tasks     Task[]

  @@map("rooms")
}

model Batch {
  id          String    @id @default(uuid())
  name        String    // e.g., "B-2023-10-15-GG4"
  strain      String
  startDate   DateTime
  harvestDate DateTime?
  status      String    @default("ACTIVE") // ACTIVE, HARVESTED, COMPLETED
  
  plantCount  Int      @default(0)
  source      BatchSource @default(CLONE)
  stage       BatchStage @default(CLONE_IN)
  metrcTags   String[] // array of METRC tag IDs
  
  roomId      String?
  room        Room?     @relation(fields: [roomId], references: [id])
  
  tasks       Task[]
  touchPoints PlantTouchPoint[]
  ipmSchedule IPMSchedule?
  
  // Phase 3 Relations
  weights     WeightLog[]
  notes       BatchNote[]
  photos      BatchPhoto[]
  facilityPlants FacilityPlant[]

  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt

  @@map("batches")
}

model TaskTemplate {
  id               String   @id @default(uuid())
  title            String
  description      String? // Instructions/SOP
  roomType         RoomType?
  estimatedMinutes Int?
  materials        String[] // Array of material names
  recurrence       Json?    // Cron or custom pattern
  
  createdAt        DateTime @default(now())
  updatedAt        DateTime @updatedAt

  tasks            Task[]

  @@map("task_templates")
}

model Task {
  id           String     @id @default(uuid())
  title        String
  description  String?
  status       TaskStatus @default(PENDING)
  priority     String     @default("MEDIUM")
  
  templateId   String?
  template     TaskTemplate? @relation(fields: [templateId], references: [id])

  assignedToId String?
  assignedTo   User?      @relation(fields: [assignedToId], references: [id])
  
  batchId      String?
  batch        Batch?     @relation(fields: [batchId], references: [id])
  
  roomId       String?
  room         Room?      @relation(fields: [roomId], references: [id])

  dueDate      DateTime?
  completedAt  DateTime?
  
  notes        String?
  photos       String[]

  createdAt    DateTime   @default(now())
  updatedAt    DateTime   @updatedAt

  @@map("tasks")
}

model TimeLog {
  id           String    @id @default(uuid())
  userId       String
  user         User      @relation(fields: [userId], references: [id])
  
  startTime    DateTime
  endTime      DateTime?
  activityType String?   // e.g. "Trimming", "Feeding", "Cleaning"
  notes        String?
  
  createdAt    DateTime  @default(now())
  updatedAt    DateTime  @updatedAt

  @@map("time_logs")
}

// Daily Walkthrough Models
model DailyWalkthrough {
  id          String            @id @default(uuid())
  date        DateTime          @default(now())
  completedBy String
  user        User              @relation(fields: [completedBy], references: [id])
  startTime   DateTime          @default(now())
  endTime     DateTime?
  status      WalkthroughStatus @default(IN_PROGRESS)
  
  reservoirChecks   ReservoirCheck[]
  irrigationChecks  IrrigationCheck[]
  plantHealthChecks PlantHealthCheck[]
  
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  @@map("daily_walkthroughs")
}

model WalkthroughSettings {
  id          String   @id @default("default")
  
  // Photo Requirements
  reservoirPhotos    PhotoRequirement @default(OPTIONAL)
  irrigationPhotos   PhotoRequirement @default(OPTIONAL)
  plantHealthPhotos  PhotoRequirement @default(REQUIRED)
  
  // Enabled Sections
  enableReservoirs   Boolean @default(true)
  enableIrrigation   Boolean @default(true)
  enablePlantHealth  Boolean @default(true)
  
  updatedAt   DateTime @updatedAt

  @@map("walkthrough_settings")
}

enum PhotoRequirement {
  REQUIRED
  OPTIONAL
  WEEKLY
  ON_DEMAND
}

model ReservoirCheck {
  id              String           @id @default(uuid())
  walkthroughId   String
  walkthrough     DailyWalkthrough @relation(fields: [walkthroughId], references: [id], onDelete: Cascade)
  
  tankName        String
  tankType        TankType
  levelPercent    Int
  status          TankStatus
  photoUrl        String?
  notes           String?
  
  createdAt       DateTime @default(now())

  @@map("reservoir_checks")
}

model IrrigationCheck {
  id                String           @id @default(uuid())
  walkthroughId     String
  walkthrough       DailyWalkthrough @relation(fields: [walkthroughId], references: [id], onDelete: Cascade)
  
  zoneName          String // "Veg Upstairs", "Veg Downstairs", "Flower Upstairs", "Flower Downstairs"
  drippersTotal     Int
  drippersWorking   Int
  drippersFailed    String? // JSON array of failed dripper IDs
  waterFlow         Boolean
  nutrientsMixed    Boolean
  scheduleActive    Boolean
  photoUrl          String? // Photo of working system
  issues            String?
  
  createdAt         DateTime @default(now())

  @@map("irrigation_checks")
}

model PlantHealthCheck {
  id                String           @id @default(uuid())
  walkthroughId     String
  walkthrough       DailyWalkthrough @relation(fields: [walkthroughId], references: [id], onDelete: Cascade)
  
  zoneName          String
  healthStatus      HealthStatus
  pestsObserved     Boolean
  pestType          String?
  waterAccess       AccessStatus
  foodAccess        AccessStatus
  flaggedForAttention Boolean        @default(false)
  issuePhotoUrl     String?
  referencePhotoUrl String? // Photo of healthy system
  notes             String?
  
  createdAt         DateTime @default(now())

  @@map("plant_health_checks")
}
// Supply/Shopping List models
model SupplyItem {
  id            String         @id @default(uuid())
  name          String
  category      SupplyCategory
  quantity      Int            @default(0)
  minThreshold  Int            @default(0)
  unit          String         // "each", "box", "roll", "gallon", etc.
  location      String?        // "Storage Room", "Bathroom", etc.
  vendor        String?        // "Amazon", "Local", etc.
  productUrl    String?        // Link to reorder
  lastOrdered   DateTime?
  notes         String?
  
  createdAt     DateTime       @default(now())
  updatedAt     DateTime       @updatedAt

  @@map("supply_items")
}

enum SupplyCategory {
  FILTER        // Air filters, water filters
  CLEANING      // Cleaning supplies
  PPE           // Gloves, masks, suits
  OFFICE        // Paper, pens, etc.
  BATHROOM      // Toilet paper, soap, etc.
  KITCHEN       // Coffee, snacks, etc.
  MAINTENANCE   // Tools, parts, etc.
  OTHER
}

// Plant Touch Points
model PlantTouchPoint {
  id          String   @id @default(uuid())
  type        TouchType
  notes       String?
  photoUrls   String[] // Changed from single photoUrl to array
  
  // Measurements
  heightCm    Float?
  widthCm     Float?

  // IPM specific
  ipmProduct  String?  // e.g., "Pyganic 5.0"
  ipmDosage   String?  // e.g., "1 oz per gallon"
  
  // Issues
  issuesObserved Boolean @default(false)
  issueType      String?

  batchId     String
  batch       Batch    @relation(fields: [batchId], references: [id])
  
  createdBy   String
  user        User     @relation(fields: [createdBy], references: [id])
  
  createdAt   DateTime @default(now())

  @@map("plant_touch_points")
}

enum TouchType {
  WATER
  FEED
  PRUNE
  TRAIN
  INSPECT
  IPM
  TRANSPLANT
  HARVEST
  OTHER
}

model IPMSchedule {
  id              String   @id @default(uuid())
  batchId         String   @unique // One schedule per batch
  batch           Batch    @relation(fields: [batchId], references: [id])
  
  product         String   // "Pyganic 5.0"
  intervalDays    Int      // 10
  lastTreatment   DateTime?
  nextTreatment   DateTime? // Calculated
  
  isActive        Boolean  @default(true)
  
  createdAt       DateTime @default(now())
  updatedAt       DateTime @updatedAt

  @@map("ipm_schedules")
}

// --- Phase 3: Batch Lifecycle & Room Management ---

enum BatchSource {
  CLONE
  SEED
}

enum BatchStage {
  CLONE_IN
  VEGETATIVE
  FLOWERING
  HARVEST
  DRYING
  CURING
  FINISHED
}

enum RoomStatus {
  ACTIVE
  CLEANING
  MAINTENANCE
}

enum WeightType {
  WET
  BUCKED
  FINAL_DRY
  TRIM
  WASTE
}

model WeightLog {
  id          String   @id @default(uuid())
  batchId     String
  batch       Batch    @relation(fields: [batchId], references: [id])
  weightType  WeightType
  weight      Float    // grams
  unit        String   @default("g")
  notes       String?
  photos      String[] // URLs
  loggedBy    String
  user        User     @relation(fields: [loggedBy], references: [id])
  createdAt   DateTime @default(now())
  
  @@map("weight_logs")
}

model BatchNote {
  id        String   @id @default(uuid())
  batchId   String
  batch     Batch    @relation(fields: [batchId], references: [id])
  content   String   // markdown
  authorId  String
  author    User     @relation(fields: [authorId], references: [id])
  createdAt DateTime @default(now())
  
  @@map("batch_notes")
}

model BatchPhoto {
  id        String   @id @default(uuid())
  batchId   String
  batch     Batch    @relation(fields: [batchId], references: [id])
  url       String
  caption   String?
  uploadedBy String
  user      User     @relation(fields: [uploadedBy], references: [id])
  createdAt DateTime @default(now())
  
  @@map("batch_photos")
}

// ============================================
// FACILITY LAYOUT MODELS (Phase 7)
// ============================================

enum SectionType {
  TABLE
  RACK
  TRAY
  HANGER
  FLOOR
}

// Plant Type Library (Rackula-inspired DeviceType pattern)
enum PlantCategory {
  VEG
  FLOWER
  MOTHER
  CLONE
  SEEDLING
}

model PlantType {
  id            String        @id @default(uuid())
  slug          String        @unique  // kebab-case identifier (e.g., "gorilla-glue-4")
  name          String                  // Display name
  strain        String?                 // Strain name
  category      PlantCategory           // VEG, FLOWER, MOTHER, CLONE, SEEDLING
  colour        String                  // Hex color for display (e.g., "#4A90D9")
  growthDays    Int?                    // Expected days to harvest
  yieldGrams    Float?                  // Expected yield in grams
  notes         String?
  tags          String[]
  customFields  Json?
  createdAt     DateTime      @default(now())
  updatedAt     DateTime      @updatedAt
  
  @@map("plant_types")
}


model FacilityProperty {
  id          String   @id @default(uuid())
  name        String
  address     String?
  licenseNum  String?  // DCC License Number
  buildings   FacilityBuilding[]
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("facility_properties")
}

model FacilityBuilding {
  id          String   @id @default(uuid())
  property    FacilityProperty @relation(fields: [propertyId], references: [id], onDelete: Cascade)
  propertyId  String
  name        String
  code        String   // Short code: "GROW1"
  type        String   // CULTIVATION, PROCESSING, DRYING, STORAGE
  floors      FacilityFloor[]
  layout      Json?    // Visual layout data
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("facility_buildings")
}

model FacilityFloor {
  id          String   @id @default(uuid())
  building    FacilityBuilding @relation(fields: [buildingId], references: [id], onDelete: Cascade)
  buildingId  String
  name        String   // "Floor 1", "Ground Floor"
  number      Int      // 1, 2, 3...
  width       Int      // feet
  height      Int      // feet
  ceilingHeight Float? // feet
  defaultTiers  Int    @default(1)
  rooms       FacilityRoom[]
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("facility_floors")
}

model FacilityRoom {
  id          String   @id @default(uuid())
  floor       FacilityFloor @relation(fields: [floorId], references: [id], onDelete: Cascade)
  floorId     String
  name        String
  code        String   // "VEG-A"
  type        RoomType // VEG, FLOWER, etc.
  posX        Int      // Position X in pixels
  posY        Int      // Position Y in pixels
  width       Int      // Width in pixels
  height      Int      // Height in pixels  
  rotation    Int      @default(0)
  color       String?  // Custom color override
  sections    FacilitySection[]
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("facility_rooms")
}

model FacilitySection {
  id          String   @id @default(uuid())
  room        FacilityRoom @relation(fields: [roomId], references: [id], onDelete: Cascade)
  roomId      String
  name        String   // "Table 1"
  code        String   // "T1"
  type        SectionType
  posX        Int      // Relative to room
  posY        Int
  width       Int
  height      Int
  rows        Int      // Grid rows
  columns     Int      // Grid columns
  tiers       Int      @default(1) // Number of vertical tiers
  spacing     Int      @default(12) // inches between positions
  positions   FacilityPosition[]
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("facility_sections")
}

model FacilityPosition {
  id          String   @id @default(uuid())
  section     FacilitySection @relation(fields: [sectionId], references: [id], onDelete: Cascade)
  sectionId   String
  row         Int
  column      Int
  tier        Int      @default(1) // Vertical level (1 = bottom)
  slot        Int      @default(1) // For multi-plant positions
  status      String   @default("EMPTY") // EMPTY, OCCUPIED, RESERVED, DAMAGED
  plant       FacilityPlant?
  
  @@unique([sectionId, row, column, tier, slot])
  @@map("facility_positions")
}

model FacilityPlant {
  id          String   @id @default(uuid())
  tagNumber   String   @unique // METRC tag
  batchId     String?
  batch       Batch?   @relation(fields: [batchId], references: [id])
  plantTypeId String?
  plantType   PlantType? @relation(fields: [plantTypeId], references: [id])
  position    FacilityPosition @relation(fields: [positionId], references: [id])
  positionId  String   @unique
  address     String   // Full hierarchical address
  status      String   @default("ACTIVE") // ACTIVE, HARVESTED, DESTROYED, TRANSFERRED
  history     PlantLocationHistory[]
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("facility_plants")
}

model PlantLocationHistory {
  id          String   @id @default(uuid())
  plant       FacilityPlant @relation(fields: [plantId], references: [id], onDelete: Cascade)
  plantId     String
  fromAddress String?
  toAddress   String
  movedById   String   // User ID
  reason      String?  // TRANSPLANT, REORGANIZE, HARVEST
  movedAt     DateTime @default(now())
  
  @@map("plant_location_history")
}

// =============================================================================
// PHASE 8: VISITOR MANAGEMENT
// =============================================================================

enum VisitorType {
  VISITOR
  CONTRACTOR
  INSPECTOR
  VENDOR
  DELIVERY
  OTHER
}

enum VisitorStatus {
  PRE_REGISTERED
  CHECKED_IN
  CHECKED_OUT
  DENIED
  REVOKED
}

model Visitor {
  id            String        @id @default(uuid())
  name          String
  company       String?
  email         String?
  phone         String?
  photoUrl      String?
  idType        String?       // Driver License, Passport, etc.
  idNumber      String?
  type          VisitorType   @default(VISITOR)
  purpose       String
  ndaAccepted   Boolean       @default(false)
  ndaAcceptedAt DateTime?
  notes         String?
  logs          VisitorLog[]
  createdAt     DateTime      @default(now())
  updatedAt     DateTime      @updatedAt
  
  @@map("visitors")
}

model VisitorLog {
  id            String        @id @default(uuid())
  visitor       Visitor       @relation(fields: [visitorId], references: [id], onDelete: Cascade)
  visitorId     String
  status        VisitorStatus @default(CHECKED_IN)
  entryTime     DateTime      @default(now())
  exitTime      DateTime?
  escort        User?         @relation("VisitorEscort", fields: [escortId], references: [id])
  escortId      String?
  approvedBy    User?         @relation("VisitorApprover", fields: [approvedById], references: [id])
  approvedById  String?
  badgeNumber   String?
  badgeExpiry   DateTime?
  zones         String[]      // AccessZone IDs visited
  signature     String?       // Base64 or URL
  temperatureF  Float?        // Health screening
  notes         String?
  
  @@map("visitor_logs")
}

model AccessZone {
  id              String   @id @default(uuid())
  name            String
  code            String   @unique
  description     String?
  escortRequired  Boolean  @default(false)
  badgeRequired   Boolean  @default(true)
  ndaRequired     Boolean  @default(false)
  allowedTypes    VisitorType[]
  maxOccupancy    Int?
  parentZoneId    String?
  parentZone      AccessZone?  @relation("ZoneHierarchy", fields: [parentZoneId], references: [id])
  childZones      AccessZone[] @relation("ZoneHierarchy")
  createdAt       DateTime @default(now())
  updatedAt       DateTime @updatedAt
  
  @@map("access_zones")
}

// =============================================================================
// PHASE 9: MESSAGING & ANNOUNCEMENTS
// =============================================================================

enum AnnouncementPriority {
  INFO
  WARNING
  CRITICAL
}

model Announcement {
  id            String   @id @default(uuid())
  title         String
  body          String
  priority      AnnouncementPriority @default(INFO)
  requiresAck   Boolean  @default(false)
  targetRoles   String[] // Which roles see this
  expiresAt     DateTime?
  createdBy     User     @relation("AnnouncementCreator", fields: [createdById], references: [id])
  createdById   String
  createdAt     DateTime @default(now())
  updatedAt     DateTime @updatedAt
  acks          AnnouncementAck[]
  
  @@map("announcements")
}

model AnnouncementAck {
  id              String   @id @default(uuid())
  announcement    Announcement @relation(fields: [announcementId], references: [id], onDelete: Cascade)
  announcementId  String
  user            User     @relation("AnnouncementAcker", fields: [userId], references: [id])
  userId          String
  readAt          DateTime?
  acknowledgedAt  DateTime?
  
  @@unique([announcementId, userId])
  @@map("announcement_acks")
}

// Shift notes for handoff communication
model ShiftNote {
  id          String   @id @default(uuid())
  roomId      String?
  batchId     String?
  content     String
  importance  String   @default("NORMAL") // LOW, NORMAL, HIGH, URGENT
  readBy      String[] // User IDs who have read this
  createdBy   User     @relation("ShiftNoteCreator", fields: [createdById], references: [id])
  createdById String
  createdAt   DateTime @default(now())
  expiresAt   DateTime? // Auto-expire old notes
  
  @@map("shift_notes")
}

// =============================================================================
// PHASE 10: COMPLIANCE & AUDIT TRAIL
// =============================================================================

enum AuditAction {
  CREATE
  UPDATE
  DELETE
  LOGIN
  LOGOUT
  ACCESS
  EXPORT
  APPROVE
  REJECT
}

// Immutable audit log - append only
model AuditLog {
  id          String      @id @default(uuid())
  userId      String?
  userName    String?     // Denormalized for persistence
  action      AuditAction
  entity      String      // Model name: Batch, Task, Plant, etc.
  entityId    String?
  entityName  String?     // Denormalized description
  before      Json?       // State before change
  after       Json?       // State after change
  changes     Json?       // Only the changed fields
  ipAddress   String?
  userAgent   String?
  sessionId   String?
  metadata    Json?       // Additional context
  timestamp   DateTime    @default(now())
  
  @@index([userId])
  @@index([entity, entityId])
  @@index([timestamp])
  @@map("audit_logs")
}

enum DocumentType {
  SOP
  POLICY
  TRAINING
  FORM
  CHECKLIST
  OTHER
}

enum DocumentStatus {
  DRAFT
  PENDING_REVIEW
  APPROVED
  ARCHIVED
}

model Document {
  id            String         @id @default(uuid())
  title         String
  type          DocumentType
  status        DocumentStatus @default(DRAFT)
  content       String         // Markdown or HTML
  version       Int            @default(1)
  effectiveDate DateTime?
  expiresAt     DateTime?
  requiresAck   Boolean        @default(false)
  targetRoles   String[]       // Who must read this
  createdBy     User           @relation("DocumentCreator", fields: [createdById], references: [id])
  createdById   String
  approvedBy    User?          @relation("DocumentApprover", fields: [approvedById], references: [id])
  approvedById  String?
  approvedAt    DateTime?
  versions      DocumentVersion[]
  acks          DocumentAck[]
  createdAt     DateTime       @default(now())
  updatedAt     DateTime       @updatedAt
  
  @@map("documents")
}

model DocumentVersion {
  id          String   @id @default(uuid())
  document    Document @relation(fields: [documentId], references: [id], onDelete: Cascade)
  documentId  String
  version     Int
  title       String
  content     String
  changedBy   String   // User ID
  changeNotes String?
  createdAt   DateTime @default(now())
  
  @@unique([documentId, version])
  @@map("document_versions")
}

model DocumentAck {
  id            String   @id @default(uuid())
  document      Document @relation(fields: [documentId], references: [id], onDelete: Cascade)
  documentId    String
  userId        String
  version       Int      // Which version was acknowledged
  acknowledgedAt DateTime @default(now())
  
  @@unique([documentId, userId])
  @@map("document_acks")
}

// =============================================================================
// PHASE 13: ADVANCED FEATURES
// =============================================================================

// ---------------------- Environmental Monitoring ----------------------

enum SensorType {
  TEMPERATURE
  HUMIDITY
  CO2
  LIGHT_PAR
  LIGHT_LUX
  PH
  EC
  VPD
  SOIL_MOISTURE
  AIR_FLOW
}

model Sensor {
  id          String     @id @default(uuid())
  name        String
  type        SensorType
  roomId      String?
  location    String?    // e.g., "North wall", "Canopy level"
  deviceId    String?    // Hardware device ID
  manufacturer String?
  model       String?
  isActive    Boolean    @default(true)
  minThreshold Float?
  maxThreshold Float?
  readings    SensorReading[]
  alerts      EnvironmentAlert[]
  createdAt   DateTime   @default(now())
  updatedAt   DateTime   @updatedAt
  
  @@index([roomId])
  @@index([type])
  @@map("sensors")
}

model SensorReading {
  id        String   @id @default(uuid())
  sensor    Sensor   @relation(fields: [sensorId], references: [id], onDelete: Cascade)
  sensorId  String
  value     Float
  unit      String   // °F, %, ppm, μmol/m²/s, etc.
  timestamp DateTime @default(now())
  
  @@index([sensorId, timestamp])
  @@map("sensor_readings")
}

enum AlertSeverity {
  INFO
  WARNING
  CRITICAL
  EMERGENCY
}

model EnvironmentAlert {
  id          String        @id @default(uuid())
  sensor      Sensor?       @relation(fields: [sensorId], references: [id])
  sensorId    String?
  roomId      String?
  type        String        // TEMP_HIGH, HUMIDITY_LOW, CO2_HIGH, etc.
  severity    AlertSeverity
  message     String
  value       Float?
  threshold   Float?
  acknowledgedAt DateTime?
  acknowledgedBy String?
  resolvedAt  DateTime?
  resolvedBy  String?
  createdAt   DateTime      @default(now())
  
  @@index([roomId, createdAt])
  @@index([severity])
  @@map("environment_alerts")
}

// Environment targets per room/stage
model EnvironmentProfile {
  id          String   @id @default(uuid())
  name        String
  stage       String?  // CLONE, VEG, FLOWER, DRY, CURE
  roomId      String?
  tempMinF    Float?
  tempMaxF    Float?
  humidityMin Float?
  humidityMax Float?
  co2Min      Float?
  co2Max      Float?
  lightHours  Float?
  vpdMin      Float?
  vpdMax      Float?
  isDefault   Boolean  @default(false)
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt
  
  @@map("environment_profiles")
}

// ---------------------- Financial Tracking ----------------------

enum TransactionType {
  EXPENSE
  REVENUE
  ADJUSTMENT
}

enum ExpenseCategory {
  LABOR
  NUTRIENTS
  SUPPLIES
  EQUIPMENT
  UTILITIES
  RENT
  LICENSES
  TESTING
  PACKAGING
  MARKETING
  OTHER
}

model FinancialTransaction {
  id            String          @id @default(uuid())
  type          TransactionType
  category      ExpenseCategory?
  amount        Float
  description   String
  batchId       String?         // Link to batch for cost tracking
  roomId        String?
  vendorId      String?
  invoiceNumber String?
  date          DateTime        @default(now())
  createdBy     String
  attachments   String[]        // URLs to receipts/invoices
  tags          String[]
  createdAt     DateTime        @default(now())
  updatedAt     DateTime        @updatedAt
  
  @@index([type, date])
  @@index([batchId])
  @@index([category])
  @@map("financial_transactions")
}

// Cost aggregation per batch
model BatchCost {
  id          String   @id @default(uuid())
  batchId     String   @unique
  laborCost   Float    @default(0)
  nutrientCost Float   @default(0)
  utilityCost Float    @default(0)
  supplyCost  Float    @default(0)
  otherCost   Float    @default(0)
  totalCost   Float    @default(0)
  plantCount  Int      @default(0)
  costPerPlant Float?
  yieldGrams  Float?
  costPerGram Float?
  updatedAt   DateTime @updatedAt
  
  @@map("batch_costs")
}

// Revenue tracking
model Sale {
  id           String   @id @default(uuid())
  batchId      String?
  product      String
  quantity     Float
  unit         String   // grams, ounces, units
  pricePerUnit Float
  totalPrice   Float
  customerId   String?
  invoiceId    String?
  date         DateTime @default(now())
  notes        String?
  createdBy    String
  createdAt    DateTime @default(now())
  
  @@index([batchId])
  @@index([date])
  @@map("sales")
}

// ---------------------- AI/ML Predictions ----------------------

model YieldPrediction {
  id           String   @id @default(uuid())
  batchId      String
  predictedYield Float  // grams
  confidence   Float    // 0-1
  factors      Json?    // Contributing factors
  predictedAt  DateTime @default(now())
  actualYield  Float?   // Filled in after harvest
  accuracy     Float?   // Calculated after actual
  
  @@index([batchId])
  @@map("yield_predictions")
}

model AnomalyDetection {
  id          String   @id @default(uuid())
  entityType  String   // Batch, Room, Sensor
  entityId    String
  anomalyType String   // GROWTH_SLOW, YIELD_LOW, ENV_UNSTABLE
  severity    String
  description String
  data        Json?
  isResolved  Boolean  @default(false)
  detectedAt  DateTime @default(now())
  
  @@index([entityType, entityId])
  @@map("anomaly_detections")
}