import { NextResponse } from "next/server"
import { requirePhoneAgentInternalAuth } from "@/app/api/internal/phone-calls/shared"
import { listFutureCallbackSlots } from "@/lib/google-calendar"

export async function POST(request: Request) {
  const authError = await requirePhoneAgentInternalAuth(request)
  if (authError) {
    return authError
  }

  try {
    const body = await request.json().catch(() => ({}))
    const limit =
      typeof body.limit === "number" && body.limit > 0
        ? Math.min(body.limit, 5)
        : 3

    const slots = await listFutureCallbackSlots(limit)
    return NextResponse.json({
      success: true,
      slots,
    })
  } catch (error) {
    console.error("Failed to list phone agent callback slots:", error)
    return NextResponse.json(
      { error: "Failed to list phone agent callback slots" },
      { status: 500 }
    )
  }
}