import { NextResponse } from "next/server";
import { prisma } from "@capakraken/db";
import { checkChargeabilityAlerts } from "@capakraken/api";
import { logger } from "@capakraken/api/lib/logger";
import { verifyCronSecret } from "~/lib/cron-auth.js";

export const dynamic = "force-dynamic";
export const runtime = "nodejs";

/**
 * GET /api/cron/chargeability-alerts
 *
 * Finds resources whose current-month chargeability is >15 percentage points
 * below their target and creates in-app notifications for managers.
 *
 * Duplicate-safe: only one alert per resource per month.
 *
 * Optionally protect with CRON_SECRET environment variable.
 * When set, requests must include `Authorization: Bearer <secret>`.
 */
export async function GET(request: Request) {
  const deny = verifyCronSecret(request);
  if (deny) return deny;

  try {
    const alertsSent = await checkChargeabilityAlerts(prisma);

    return NextResponse.json({
      ok: true,
      alertsSent,
      checkedAt: new Date().toISOString(),
    });
  } catch (error) {
    logger.error(
      { error, route: "/api/cron/chargeability-alerts" },
      "Chargeability alert cron failed",
    );
    return NextResponse.json({ ok: false, error: "Internal error" }, { status: 500 });
  }
}