/// An appointment on the workshop calendar with no job behind it: a customer
/// coming in to talk, a test drive, a supplier's visit. Work on a car is booked
/// as a scheduled job instead (ServiceRecord with status `scheduled`), which
/// holds a bay and gets a number. An appointment can become such a job, and is
/// removed when it does.
model Appointment {
  id          String   @id @default(cuid())
  title       String
  /// Rich text from the editor, cleaned when it is saved and again when shown.
  description String?
  startAt     DateTime
  endAt       DateTime
  createdAt   DateTime @default(now())
  updatedAt   DateTime @updatedAt

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

  /// Who it is with, when it is with anyone on file.
  customerId String?
  customer   Customer? @relation(fields: [customerId], references: [id], onDelete: SetNull)
  vehicleId  String?
  vehicle    Vehicle?  @relation(fields: [vehicleId], references: [id], onDelete: SetNull)

  createdById String?
  createdBy   User?   @relation("AppointmentCreatedBy", fields: [createdById], references: [id], onDelete: SetNull)

  notifications AppointmentNotification[]

  @@index([organizationId, startAt])
  @@index([customerId])
  @@index([vehicleId])
  @@map("appointments")
}

/// One alert before an appointment or a booked job, the way a calendar sets
/// them: how it goes out and how long before. It goes out once for each start
/// time, so moving the appointment, here or on the work board, arms it again.
model AppointmentNotification {
  id           String    @id @default(cuid())
  /// in_app | email | customer_sms | customer_email
  channel      String
  /// How long before the start, in `unit`s.
  amount       Int
  /// minutes | hours | days | weeks
  unit         String
  /// HH:MM on that day for a notice given in days or weeks ("1 day before at
  /// 16:00"), on the workshop's clock. Null for minutes and hours.
  atTime       String?
  /// The start it last went out for. Any other start means it has not gone
  /// out for this one yet.
  sentForStart DateTime?
  createdAt    DateTime  @default(now())
  updatedAt    DateTime  @updatedAt

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

  /// Who set it. An email to the workshop goes to them.
  userId String?
  user   User?   @relation("AppointmentNotificationUser", fields: [userId], references: [id], onDelete: SetNull)

  /// What it is for: an appointment, or a booked job. Exactly one is set.
  appointmentId   String?
  appointment     Appointment?   @relation(fields: [appointmentId], references: [id], onDelete: Cascade)
  serviceRecordId String?
  serviceRecord   ServiceRecord? @relation(fields: [serviceRecordId], references: [id], onDelete: Cascade)

  @@index([organizationId])
  @@index([appointmentId])
  @@index([serviceRecordId])
  @@map("appointment_notifications")
}