import { createContext, DomainError } from "@tailor-platform/erp-kit/app";
import { createResolver, t } from "@tailor-platform/sdk";
import { getDB } from "@/generated/kysely-tailordb";
import { arModulesExport } from "@/modules";

/**
 * postIncomingPayment — post a DRAFT incoming payment to the general ledger.
 *
 * Posting books the balanced cash-receipt entry (Dr Cash / Cr Accounts
 * Receivable for the settled amount, direction-aware for credit-memo
 * settlements) under `sourceDocumentType = INCOMING_PAYMENT`, applies the
 * settlement allocations against the targeted AR due-schedule lines, and moves
 * the payment DRAFT -> POSTED in the same transaction. It rejects
 * over-settlement (receiving more than an open item's balance), a total that
 * does not reconcile with the settlements, ineligible targets (e.g. an unposted
 * invoice), and a payment currency that differs from the company base currency.
 * `id` is the IncomingPayment id. This is the AR mirror of `postOutgoingPayment`.
 */
export default createResolver({
  name: "postIncomingPayment",
  operation: "mutation",
  input: {
    id: t.string().description("Incoming payment ID"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await arModulesExport.commands.postIncomingPayment(
          trx,
          { id: context.input.id },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_NOT_FOUND":
              throw new DomainError(`Incoming payment not found: ${context.input.id}`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_INVALID_STATUS":
              throw new DomainError(`Only a DRAFT payment can be posted: ${context.input.id}`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_OVER_SETTLEMENT":
              throw new DomainError(`A settlement exceeds the open balance of its target line.`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_TOTAL_MISMATCH":
              throw new DomainError(`The payment total does not reconcile with its settlements.`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_TARGET_INELIGIBLE":
              throw new DomainError(
                `A settlement target is not eligible (e.g. the invoice is not posted).`,
              );
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_SETTLEMENT_INVALID":
              throw new DomainError(`A settlement allocation is invalid.`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_INVALID_AMOUNT":
              throw new DomainError(`The payment amount must be a positive value.`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_ACCOUNTING_PERIOD_NOT_FOUND":
              throw new DomainError(`No accounting period covers the payment date.`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_JOURNAL_ENTRY_CREATE_FAILED":
              throw new DomainError(`Failed to create the journal entry for this payment.`);
            case "ACCOUNT_RECEIVABLE_INCOMING_PAYMENT_JOURNAL_ENTRY_POST_FAILED":
              throw new DomainError(`Failed to post the journal entry for this payment.`);
            case "ACCOUNT_RECEIVABLE_COMPANY_NOT_FOUND":
              throw new DomainError("The payment company does not exist.");
            case "ACCOUNT_RECEIVABLE_COMPANY_INACTIVE":
              throw new DomainError("The payment company is not active.");
            case "ACCOUNT_RECEIVABLE_CUSTOMER_ACCOUNT_NOT_FOUND":
              throw new DomainError("The payment customer does not exist.");
            case "ACCOUNT_RECEIVABLE_INVALID_CUSTOMER_ACCOUNT":
              throw new DomainError(
                "The customer account is not valid for this company or is inactive.",
              );
            case "ACCOUNT_RECEIVABLE_CURRENCY_NOT_FOUND":
              throw new DomainError("The payment currency is not configured.");
            case "ACCOUNT_RECEIVABLE_ACCOUNT_NOT_FOUND":
              throw new DomainError("A referenced GL account does not exist.");
            case "ACCOUNT_RECEIVABLE_ACCOUNT_INACTIVE":
              throw new DomainError("A referenced GL account is not ACTIVE.");
            case "ACCOUNT_RECEIVABLE_ACCOUNT_COMPANY_MISMATCH":
              throw new DomainError("A referenced GL account belongs to a different company.");
            case "UNAUTHENTICATED":
              throw new DomainError("Authentication is required");
            case "INSUFFICIENT_PERMISSION":
              throw new DomainError("You do not have permission to perform this action");
            default:
              throw result.error satisfies never;
          }
        }

        return {
          id: result.value.incomingPayment.id,
          status: result.value.incomingPayment.status,
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to post the incoming payment", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Posted incoming payment ID"),
      status: t.string().description("Lifecycle status (POSTED after posting)"),
    })
    .description("Posted incoming payment"),
});