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

export default createResolver({
  name: "closePurchaseOrder",
  operation: "mutation",
  input: {
    id: t.string().description("Purchase order ID"),
    closeReason: t.string({ optional: true }).description("Reason for closing the order"),
    writeOffRemaining: t
      .bool({ optional: true })
      .description("Write off remaining open quantities"),
  },
  body: async (context) => {
    const ctx = createContext(context);
    const db = getDB("main-db");
    return db
      .transaction()
      .execute(async (trx) => {
        const result = await purchaseModules.commands.closePurchaseOrder(
          trx,
          {
            id: context.input.id,
            closeReason: context.input.closeReason ?? undefined,
            writeOffRemaining: context.input.writeOffRemaining ?? undefined,
          },
          ctx,
        );

        if (!result.ok) {
          switch (result.error.code) {
            case "PURCHASE_PURCHASE_ORDER_NOT_FOUND":
              throw new DomainError(`Purchase order not found: ${context.input.id}`);
            case "PURCHASE_PURCHASE_ORDER_NOT_CLOSABLE":
              throw new DomainError(
                `Purchase order cannot be closed in its current status: ${context.input.id}`,
              );
            case "PURCHASE_OPEN_QUANTITY_REMAINS":
              throw new DomainError(
                `Open quantity remains on one or more lines; set writeOffRemaining to close anyway`,
              );
            case "PURCHASE_CLOSE_REASON_REQUIRED":
              throw new DomainError(
                `A close reason is required when writing off remaining quantities`,
              );
            case "INVENTORY_INVENTORY_SUPPLY_PLAN_NOT_FOUND":
              throw new DomainError("A related supply plan was not found.");
            case "INVENTORY_SUPPLY_PLAN_NOT_OPEN":
              throw new DomainError("A related supply plan is not open.");
            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.purchaseOrderId,
          // A successful transition implies the target status.
          status: "CLOSED",
        };
      })
      .catch((err: unknown) => {
        if (err instanceof DomainError) throw err;
        throw new Error("Failed to close the purchase order", { cause: err });
      });
  },
  output: t
    .object({
      id: t.string().description("Purchase order ID"),
      status: t.string().description("New order status"),
    })
    .description("ClosePurchaseOrder response"),
});