import type { CompetitionCategory, PrismaClient } from '@prisma/client'
import { signFinalistToken } from '@/lib/finalist-token'

type AnyPrisma = Pick<PrismaClient, 'finalistConfirmation'>

/**
 * Create a PENDING FinalistConfirmation row with a signed token. Caller is
 * responsible for sending the notification email separately.
 */
export async function createPendingConfirmation(
  prisma: AnyPrisma,
  args: {
    projectId: string
    category: CompetitionCategory
    windowHours: number
    promotedFromWaitlistEntryId?: string
  },
): Promise<{ id: string; token: string; deadline: Date }> {
  const deadline = new Date(Date.now() + args.windowHours * 3_600_000)
  // Generate the row ID up front so we can sign it into the token before
  // writing the row (token is unique-indexed; embedding the ID gives the
  // public verify path a stable lookup key).
  const id = `cmfc_${Math.random().toString(36).slice(2, 10)}_${Date.now().toString(36)}`
  const token = signFinalistToken({
    confirmationId: id,
    exp: Math.floor(deadline.getTime() / 1000),
  })
  await prisma.finalistConfirmation.create({
    data: {
      id,
      projectId: args.projectId,
      category: args.category,
      status: 'PENDING',
      deadline,
      token,
      promotedFromWaitlistEntryId: args.promotedFromWaitlistEntryId ?? null,
    },
  })
  return { id, token, deadline }
}