import { err, ok, type CommandContext } from "@tailor-platform/erp-kit/core";
import { outgoingPaymentLifecycle } from "../db/outgoingPayment.lifecycle.generated";
import type { Transaction } from "../generated/kysely-tailordb";
import {
  OutgoingPaymentInvalidStatusError,
  OutgoingPaymentNotFoundError,
} from "../lib/errors.generated";

export interface CancelOutgoingPaymentInput {
  id: string;
}

/** Function: cancelOutgoingPayment
 * Cancels a draft payment without deleting its settlement history.
 */
export async function run(
  db: Transaction,
  input: CancelOutgoingPaymentInput,
  _ctx: CommandContext,
) {
  const outgoingPayment = await db
    .selectFrom("OutgoingPayment")
    .selectAll()
    .where("id", "=", input.id)
    .forUpdate()
    .executeTakeFirst();

  if (!outgoingPayment) return err(new OutgoingPaymentNotFoundError(input.id));
  const nextStatus = outgoingPaymentLifecycle.tryTransition(outgoingPayment.status, "cancel");
  if (!nextStatus) return err(new OutgoingPaymentInvalidStatusError(input.id));

  const cancelledOutgoingPayment = await db
    .updateTable("OutgoingPayment")
    .set({ status: nextStatus, cancelledAt: new Date() })
    .where("id", "=", input.id)
    .returningAll()
    .executeTakeFirstOrThrow();

  return ok({ outgoingPayment: cancelledOutgoingPayment });
}