/**
 * Transactional email — service SHELL.
 *
 * Each method names a real lifecycle email but currently only logs and no-ops.
 * The lifecycle (status transitions + the daily cron) drives these calls; when
 * a provider is wired up later, only the bodies here change — every call site
 * stays the same. Methods are async so the future real implementation (an HTTP
 * send) is a drop-in without touching callers.
 */
export type EmailLogger = { info: (message: string) => void }

export class EmailService {
  constructor(private readonly logger: EmailLogger) {}

  private async send(method: string, bookingId: string): Promise<void> {
    this.logger.info(`[email:shell] ${method} → booking ${bookingId} (no-op)`)
  }

  /** Enquiry submitted — acknowledge receipt to the client. */
  sendEnquiryReceivedEmail(bookingId: string) {
    return this.send('sendEnquiryReceivedEmail', bookingId)
  }

  /** Admin declined the enquiry. */
  sendEnquiryDeclinedEmail(bookingId: string) {
    return this.send('sendEnquiryDeclinedEmail', bookingId)
  }

  /** Admin approved the enquiry — dates are now soft-reserved. */
  sendReservationConfirmedEmail(bookingId: string) {
    return this.send('sendReservationConfirmedEmail', bookingId)
  }

  /** Day 0: contract (legally binding) + deposit request. Cron R1. */
  sendContractAndDepositEmail(bookingId: string) {
    return this.send('sendContractAndDepositEmail', bookingId)
  }

  /** Day 7: deposit still unpaid — reminder. Cron R2. */
  sendDepositReminderEmail(bookingId: string) {
    return this.send('sendDepositReminderEmail', bookingId)
  }

  /** Deposit recorded — reservation is now guaranteed. */
  sendBookingConfirmedEmail(bookingId: string) {
    return this.send('sendBookingConfirmedEmail', bookingId)
  }

  /** Booking cancelled at a non-enquiry stage. */
  sendCancellationEmail(bookingId: string) {
    return this.send('sendCancellationEmail', bookingId)
  }
}