import { requireUser } from "@/lib/auth";
import {
  createDocument,
  databaseConfig,
  listDocuments,
  query,
  updateDocument,
} from "@/lib/database/server";
import { syncBillLedger } from "@/lib/finance/ledger";
import { parseBillInput } from "@/lib/validation/bills";
import { nowFields, parseBody } from "@/lib/validation/common";
import type { Bill } from "@/types/finance";

export async function GET() {
  const auth = await requireUser();
  if ("response" in auth) return auth.response;
  const { collections } = databaseConfig();
  const result = await listDocuments<Bill>(collections.bills, [
    query.equal("userId", auth.user.id),
    query.orderAsc("dueDate"),
    query.limit(5000),
  ]);
  return Response.json(result.documents);
}

export async function POST(request: Request) {
  const auth = await requireUser();
  if ("response" in auth) return auth.response;
  const parsed = await parseBody(request, parseBillInput);
  if (!parsed.ok)
    return Response.json({ error: parsed.error }, { status: 400 });
  const { collections } = databaseConfig();
  let bill = await createDocument<Bill>(collections.bills, {
    ...parsed.data,
    userId: auth.user.id,
    ...nowFields(),
  });
  const ledger = await syncBillLedger(bill);
  if (ledger && bill.linkedPaymentId !== ledger.$id) {
    bill = await updateDocument<Bill>(collections.bills, bill.$id, {
      linkedPaymentId: ledger.$id,
      updatedAt: new Date().toISOString(),
    });
  }
  return Response.json(bill, { status: 201 });
}