model Vehicle {
  id                     String               @id @default(cuid())
  make                   String
  model                  String
  year                   Int
  vin                    String?
  licensePlate           String?
  color                  String?
  mileage                Int                  @default(0)
  fuelType               String?              @default("gasoline")
  transmission           String?              @default("automatic")
  engineSize             String?
  engineCode             String?
  purchaseDate           DateTime?
  purchasePrice          Float?
  imageUrl               String?
  isArchived             Boolean              @default(false)
  archiveReason          String?
  /// Set when the customer said in the portal that the vehicle is no longer theirs.
  soldReportedAt         DateTime?
  maintenanceDismissed   Boolean              @default(false)
  maintenanceDismissedAt DateTime?
  aiMessages             AiGeneratedMessage[]
  createdAt              DateTime             @default(now())
  updatedAt              DateTime             @updatedAt

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

  organizationId String?
  organization   Organization? @relation(fields: [organizationId], references: [id], onDelete: Cascade)

  customerId String?
  customer   Customer? @relation(fields: [customerId], references: [id], onDelete: SetNull)

  serviceRecords    ServiceRecord[]
  notes             Note[]
  fuelLogs          FuelLog[]
  reminders         Reminder[]
  quotes            Quote[]
  recurringInvoices RecurringInvoice[]
  inspections       Inspection[]
  serviceRequests   ServiceRequest[]
  findings          VehicleFinding[]
  scheduledMessages ScheduledMessage[]
  tireSets          TireSet[]

  inspectionStatus    VehicleInspectionStatus?
  inspectionReminders InspectionReminderSend[]

  importBatchId String?
  importBatch   ImportBatch? @relation(fields: [importBatchId], references: [id], onDelete: SetNull)

  @@index([organizationId])
  @@index([importBatchId])
  @@map("vehicles")
}

model Note {
  id        String   @id @default(cuid())
  title     String
  content   String
  isPinned  Boolean  @default(false)
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt

  vehicleId String
  vehicle   Vehicle @relation(fields: [vehicleId], references: [id], onDelete: Cascade)

  @@index([vehicleId])
  @@map("notes")
}

model FuelLog {
  id             String   @id @default(cuid())
  date           DateTime @default(now())
  mileage        Int
  gallons        Float
  pricePerGallon Float
  totalCost      Float
  isFillUp       Boolean  @default(true)
  station        String?
  notes          String?
  createdAt      DateTime @default(now())
  updatedAt      DateTime @updatedAt

  vehicleId String
  vehicle   Vehicle @relation(fields: [vehicleId], references: [id], onDelete: Cascade)

  @@index([vehicleId])
  @@map("fuel_logs")
}

model Reminder {
  id          String    @id @default(cuid())
  title       String
  description String?
  dueDate     DateTime?
  /// True when the time of day in dueDate was chosen, not the noon a
  /// day-only reminder is stored at
  hasDueTime  Boolean   @default(false)
  dueMileage  Int?
  isCompleted Boolean   @default(false)
  /// Per-reminder notification channels, chosen when creating the reminder
  notifyInApp Boolean   @default(true)
  notifyEmail Boolean   @default(false)
  /// Set by the due-reminder cron once notified; cleared when dueDate changes
  notifiedAt  DateTime?
  createdAt   DateTime  @default(now())
  updatedAt   DateTime  @updatedAt

  /// A reminder relates to a vehicle, a customer, or just the workshop
  /// (both null). organizationId is the canonical scope for all three.
  vehicleId String?
  vehicle   Vehicle? @relation(fields: [vehicleId], references: [id], onDelete: Cascade)

  customerId String?
  customer   Customer? @relation(fields: [customerId], references: [id], onDelete: Cascade)

  organizationId String?
  organization   Organization? @relation(fields: [organizationId], references: [id], onDelete: Cascade)

  @@index([vehicleId])
  @@index([customerId])
  @@index([organizationId])
  @@map("reminders")
}

model VehicleFinding {
  id          String   @id @default(cuid())
  description String
  severity    String   @default("needs_work")
  status      String   @default("open")
  notes       String?
  imageUrls   String[] @default([])
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

  vehicleId String
  vehicle   Vehicle @relation(fields: [vehicleId], references: [id], onDelete: Cascade)

  serviceRecordId String?
  serviceRecord   ServiceRecord? @relation("FindingDiscoveredIn", fields: [serviceRecordId], references: [id], onDelete: SetNull)

  resolvedServiceRecordId String?
  resolvedServiceRecord   ServiceRecord? @relation("FindingResolvedIn", fields: [resolvedServiceRecordId], references: [id], onDelete: SetNull)

  /// The customer concern this finding answers, if it answers one.
  ///
  /// Nullable because plenty of findings are things nobody asked about: the
  /// perished bush somebody noticed while the car was on the lift. Those are
  /// worth just as much, they just are not part of the story the customer
  /// started. SetNull rather than Cascade because a finding is a fact about
  /// the vehicle and outlives the concern that prompted the look.
  concernId String?
  concern   ServiceConcern? @relation(fields: [concernId], references: [id], onDelete: SetNull)

  @@index([vehicleId])
  @@index([serviceRecordId])
  @@index([concernId])
  @@map("vehicle_findings")
}

/// What a vehicle registry, or the workshop itself, last said about when the
/// vehicle's periodic roadworthiness inspection (EU-kontroll, MOT, APK, HU,
/// contrôle technique, and so on) is due. One row per vehicle. The
/// organisation is on the row so "what is due for this workshop" is one
/// indexed query and the isolation is explicit rather than inherited.
model VehicleInspectionStatus {
  id             String       @id @default(cuid())
  vehicleId      String       @unique
  vehicle        Vehicle      @relation(fields: [vehicleId], references: [id], onDelete: Cascade)
  organizationId String
  organization   Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)

  /// Next periodic inspection deadline, when known.
  dueAt      DateTime?
  /// Last approved periodic inspection, when known.
  lastAt     DateTime?
  /// Connector id ("vegvesen"), or "manual" / "inspection" for the workshop's own entries.
  source     String
  /// When a registry last confirmed the row. Null for manual entries.
  checkedAt  DateTime?
  /// False when the registry answered but had no such vehicle.
  found      Boolean   @default(true)
  /// Whether the registry lists the vehicle as currently registered, when it says.
  registered Boolean?
  /// Last lookup failure, cleared on success. Never a plate or VIN.
  lastError  String?
  /// Whatever else the registry returned and the app has no column for yet:
  /// approved tyre sizes, weights, vehicle class, first registration.
  extras     Json?
  createdAt  DateTime  @default(now())
  updatedAt  DateTime  @updatedAt

  @@index([organizationId, dueAt])
  @@index([organizationId, checkedAt])
  @@map("vehicle_inspection_statuses")
}

/// One "remind these customers" action, created only by a person confirming
/// a reviewed list. Never created by a timer.
model InspectionReminderCampaign {
  id               String       @id @default(cuid())
  organizationId   String
  organization     Organization @relation(fields: [organizationId], references: [id], onDelete: Cascade)
  createdById      String
  /// Client-generated, so a double submit creates one campaign, not two.
  idempotencyToken String       @unique
  /// Deadline window the list was built from, in days.
  windowDays       Int
  channel          String
  subject          String?
  body             String
  /// "sent" once rows exist; "dry_run" in demo mode, where nothing goes out.
  status           String       @default("sent")
  recipientCount   Int          @default(0)
  createdAt        DateTime     @default(now())

  sends InspectionReminderSend[]

  @@index([organizationId, createdAt])
  @@map("inspection_reminder_campaigns")
}

/// One customer told once about one vehicle's deadline. The unique pair of
/// vehicle and deadline is the guarantee that no deadline is ever reminded
/// twice, whatever the code above it does.
model InspectionReminderSend {
  id                     String                     @id @default(cuid())
  campaignId             String
  campaign               InspectionReminderCampaign @relation(fields: [campaignId], references: [id], onDelete: Cascade)
  organizationId         String
  organization           Organization               @relation(fields: [organizationId], references: [id], onDelete: Cascade)
  vehicleId              String
  vehicle                Vehicle                    @relation(fields: [vehicleId], references: [id], onDelete: Cascade)
  customerId             String
  customer               Customer                   @relation(fields: [customerId], references: [id], onDelete: Cascade)
  /// The deadline as it stood when the reminder went out.
  dueAt                  DateTime
  channel                String
  recipient              String
  /// Booking link secret; the link is /b/<token>.
  token                  String                     @unique
  expiresAt              DateTime
  scheduledMessageId     String?                    @unique
  scheduledMessage       ScheduledMessage?          @relation(fields: [scheduledMessageId], references: [id], onDelete: SetNull)
  /// Set when the customer booked from the link.
  bookedAt               DateTime?
  bookedServiceRecordId  String?
  bookedServiceRequestId String?
  cancelledAt            DateTime?
  createdAt              DateTime                   @default(now())

  @@unique([vehicleId, dueAt])
  @@index([organizationId, createdAt])
  @@index([campaignId])
  @@map("inspection_reminder_sends")
}