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

export default createResolver({
  name: "createCompany",
  operation: "mutation",
  input: {
    legalName: t.string().description("Legal name of the company"),
    baseCurrencyId: t.string().description("Base currency ID"),
    taxId: t.string({ optional: true }).description("Tax ID"),
    registrationNumber: t.string({ optional: true }).description("Registration number"),
    street: t.string().description("Street address"),
    city: t.string().description("City"),
    state: t.string({ optional: true }).description("State or province"),
    postalCode: t.string().description("Postal code"),
    country: t.string().description("Country"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        // Reject if a Company with the same legalName already exists,
        // regardless of status. erp-kit's createCompany does a raw INSERT
        // with no dedup; rather than try to converge an existing row to
        // the new input (DRAFT activation, status reconciliation, etc.),
        // fail loudly so the caller has to handle it explicitly.
        const existing = await trx
          .selectFrom("Company")
          .select("id")
          .where("legalName", "=", context.input.legalName)
          .limit(1)
          .executeTakeFirst();

        if (existing) {
          throw new DomainError(
            `Company with legalName="${context.input.legalName}" already exists (id=${existing.id})`,
          );
        }

        const createResult = await orgModulesExport.commands.createCompany(
          trx,
          {
            legalName: context.input.legalName,
            baseCurrencyId: context.input.baseCurrencyId,
            taxId: context.input.taxId ?? undefined,
            registrationNumber: context.input.registrationNumber ?? undefined,
            street: context.input.street,
            city: context.input.city,
            state: context.input.state ?? undefined,
            postalCode: context.input.postalCode,
            country: context.input.country,
          },
          ctx,
        );

        if (!createResult.ok) {
          switch (createResult.error.code) {
            case "ORGANIZATION_INVALID_LEGAL_NAME":
              throw new DomainError(`Invalid legal name: ${context.input.legalName}`);
            case "ORGANIZATION_CURRENCY_NOT_FOUND":
              throw new DomainError(`Currency not found: ${context.input.baseCurrencyId}`);
            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 createResult.error satisfies never;
          }
        }

        const activateResult = await orgModulesExport.commands.activateCompany(
          trx,
          { companyId: createResult.value.company.id },
          ctx,
        );

        if (!activateResult.ok) {
          switch (activateResult.error.code) {
            case "ORGANIZATION_COMPANY_NOT_FOUND":
              throw new DomainError("Company not found after creation");
            case "ORGANIZATION_INVALID_STATE":
              throw new DomainError("Company is not in DRAFT status");
            case "ORGANIZATION_MISSING_REQUIRED_FIELDS":
              throw new DomainError(
                "Missing required fields for activation: baseCurrencyId, street, city, postalCode, and country are required",
              );
            case "ORGANIZATION_INVALID_BASE_CURRENCY":
              throw new DomainError(`Base currency is not active: ${context.input.baseCurrencyId}`);
            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 activateResult.error satisfies never;
          }
        }

        return { id: createResult.value.company.id };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to create the company", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Created company ID"),
    })
    .description("Created company"),
});