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

/**
 * postAccountPayableDocument — post a REGISTERED vendor invoice to the general
 * ledger.
 *
 * Posting is the accounting step that "confirms" the invoice for payment: the
 * native command builds a balanced JournalEntry from the invoice's distribution
 * lines and the payable control account (an INVOICE debits the distribution
 * accounts and credits the payable control account; a CREDIT_MEMO reverses it),
 * posts it directly in financial-accounting under sourceDocumentType
 * ACCOUNT_PAYABLE_DOCUMENT, and moves the AP document REGISTERED -> POSTED in
 * the same transaction. Posting refuses to run while any active hold remains,
 * and requires the document currency to equal the company's base currency.
 * `id` is the AccountPayableDocument id.
 */
export default createResolver({
  name: "postAccountPayableDocument",
  operation: "mutation",
  input: {
    id: t.string().description("Account payable document ID"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await apModulesExport.commands.postAccountPayableDocument(
          trx,
          { id: context.input.id },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "ACCOUNT_PAYABLE_AP_DOCUMENT_NOT_FOUND":
              throw new DomainError(`Account payable document not found: ${context.input.id}`);
            case "ACCOUNT_PAYABLE_AP_INVALID_DOCUMENT_STATUS":
              throw new DomainError(`Only REGISTERED invoices can be posted: ${context.input.id}`);
            case "ACCOUNT_PAYABLE_AP_DOCUMENT_HAS_ACTIVE_HOLD":
              throw new DomainError(
                `Cannot post while an active hold remains; release all holds first.`,
              );
            case "ACCOUNT_PAYABLE_AP_POSTING_CURRENCY_MISMATCH":
              throw new DomainError(
                `The invoice currency must equal the company base currency to post.`,
              );
            case "ACCOUNT_PAYABLE_AP_ACCOUNTING_PERIOD_NOT_FOUND":
              throw new DomainError(`No accounting period covers the invoice posting date.`);
            case "ACCOUNT_PAYABLE_AP_LINE_TOTAL_MISMATCH":
              throw new DomainError(
                `Line/distribution totals do not reconcile with the document total.`,
              );
            case "ACCOUNT_PAYABLE_AP_MINIMUM_LINES_NOT_MET":
              throw new DomainError(
                `The invoice must have at least one line with one distribution.`,
              );
            case "ACCOUNT_PAYABLE_ACCOUNT_NOT_FOUND":
              throw new DomainError(`A referenced GL account does not exist.`);
            case "ACCOUNT_PAYABLE_ACCOUNT_INACTIVE":
              throw new DomainError(`A referenced GL account is not ACTIVE.`);
            case "ACCOUNT_PAYABLE_COMPANY_NOT_FOUND":
              throw new DomainError(`The invoice company does not exist.`);
            case "ACCOUNT_PAYABLE_AP_JOURNAL_ENTRY_CREATE_FAILED":
              throw new DomainError(`Failed to create the journal entry for this invoice.`);
            case "ACCOUNT_PAYABLE_AP_JOURNAL_ENTRY_POST_FAILED":
              throw new DomainError(`Failed to post the journal entry for this invoice.`);
            case "ACCOUNT_PAYABLE_AP_ACQUISITION_COST_ADJUSTMENT_FAILED":
              throw new DomainError("Failed to adjust acquisition costs for this invoice.");
            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.accountPayableDocument.id,
          status: result.value.accountPayableDocument.status,
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to post the account payable document", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Account payable document ID"),
      status: t.string().description("New document status (POSTED)"),
    })
    .description("PostAccountPayableDocument response"),
});