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

/**
 * cancelJournalEntry — cancel a DRAFT journal entry (DRAFT → CANCELLED).
 *
 * Thin wrapper over the native `cancelJournalEntry`. Only DRAFT entries can be
 * cancelled; a POSTED entry must be reversed instead.
 */
export default createResolver({
  name: "cancelJournalEntry",
  operation: "mutation",
  input: {
    id: t.string().description("Journal entry ID"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await finModulesExport.commands.cancelJournalEntry(
          trx,
          { journalEntryId: context.input.id },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "FINANCIAL_ACCOUNTING_JOURNAL_ENTRY_NOT_FOUND":
              throw new DomainError(`Journal entry not found: ${context.input.id}`);
            case "FINANCIAL_ACCOUNTING_INVALID_STATUS_FOR_CANCEL":
              throw new DomainError("Only a DRAFT journal entry can be cancelled.");
            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.journalEntry.id,
          status: result.value.journalEntry.status,
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to cancel the journal entry", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Journal entry ID"),
      status: t.string().description("New document status (CANCELLED)"),
    })
    .description("CancelJournalEntry response"),
});