import {
  type CommonReservedFields,
  type NoReservedFields,
  defaultGqlPermission,
  defaultPermission,
} from "@tailor-platform/erp-kit/core";
import { db, type TailorAnyDBField } from "@tailor-platform/sdk";
import { accountReceivableDueScheduleLine } from "./accountReceivableDueScheduleLine";
import { incomingPayment } from "./incomingPayment";

export const ACCOUNT_RECEIVABLE_SETTLEMENT_SOURCE_TYPES = ["INCOMING_PAYMENT"] as const;

const builtins = {
  sourceType: db
    .enum(ACCOUNT_RECEIVABLE_SETTLEMENT_SOURCE_TYPES)
    .description("Settlement source discriminator"),
  incomingPaymentId: db
    .uuid()
    .relation({
      type: "n-1",
      toward: { type: incomingPayment, as: "incomingPayment" },
      backward: "settlements",
    })
    .description("Source FK when sourceType is INCOMING_PAYMENT"),
  accountReceivableDueScheduleLineId: db
    .uuid()
    .relation({
      type: "n-1",
      toward: { type: accountReceivableDueScheduleLine, as: "accountReceivableDueScheduleLine" },
      backward: "accountReceivableSettlements",
    })
    .description("Foreign key to the settled AccountReceivableDueScheduleLine"),
  settledAmount: db.decimal().description("Positive amount allocated to the due schedule line"),
  reversalOfSettlementId: db
    .uuid({ optional: true })
    .relation({
      type: "1-1",
      toward: { type: "self" },
      backward: "reversals",
    })
    .description("Optional self-reference to the original settlement being reversed"),
};

type ReservedFields = keyof typeof builtins | CommonReservedFields;

export interface CreateAccountReceivableSettlementTypeParams<
  F extends Record<string, TailorAnyDBField>,
> {
  fields?: NoReservedFields<F, ReservedFields>;
}

export function createAccountReceivableSettlementType<
  const F extends Record<string, TailorAnyDBField>,
>(params: CreateAccountReceivableSettlementTypeParams<F>) {
  return db
    .table("AccountReceivableSettlement", {
      ...builtins,
      ...((params.fields ?? {}) as F),
      ...db.fields.timestamps(),
    })
    .indexes({
      fields: ["sourceType", "incomingPaymentId", "accountReceivableDueScheduleLineId"],
      unique: false,
      name: "account_receivable_settlement_incoming_payment_due_schedule_idx",
    })
    .permission(defaultPermission)
    .gqlPermission(defaultGqlPermission);
}

export const accountReceivableSettlement = createAccountReceivableSettlementType({});