import { csvContext, csvResponse, forbidden, unauthorized } from "@/features/reports/csv";
import { getKakeiboReport } from "@/features/reports/kakeibo";
import { tr } from "@/i18n/tr";
import { csvMoney, toCsv } from "@/shared/csv";
import { KAKEIBO_GROUPS, type SpendingClass } from "@/shared/kakeibo";

/** GET /raporlar/kakeibo/csv?ay=YYYY-MM — sınıf × kategori tutarları. */
export async function GET(request: Request) {
  const c = await csvContext(request);
  if (!c) return unauthorized();
  const r = await getKakeiboReport(c.userId, c.householdId, c.month);
  if (!r) return forbidden();
  const k = tr.kakeibo;
  const label = (cls: SpendingClass) =>
    cls === "BANK_COST" ? k.bankCost : cls === "UNGROUPED" ? k.ungrouped : k.groups[cls];
  const order: SpendingClass[] = [...KAKEIBO_GROUPS, "UNGROUPED", "BANK_COST"];
  const rows = order.flatMap((cls) =>
    r.now.byClass[cls].map((x) => [label(cls), x.path, csvMoney(x.amountMinor)]),
  );
  return csvResponse(
    toCsv(tr.reports.kakeiboReport.csvHeader, rows),
    tr.reports.kakeiboReport.csvFile(r.month),
  );
}