import type { LoaderFunctionArgs } from "@remix-run/node";
import { json } from "@remix-run/node";
import { getManufacturers, getModelsByManufacturer, getBodyType } from "~/lib/car-dataset-management.server";

export async function loader({ request }: LoaderFunctionArgs) {
  const url = new URL(request.url);
  const action = url.searchParams.get("action");
  const manufacturer = url.searchParams.get("manufacturer");
  const model = url.searchParams.get("model");

  try {
    switch (action) {
      case "manufacturers": {
        const manufacturers = await getManufacturers();
        return json({ success: true, data: manufacturers });
      }

      case "models": {
        if (!manufacturer) {
          return json({ success: false, error: "Manufacturer is required" }, { status: 400 });
        }
        const models = await getModelsByManufacturer(manufacturer);
        return json({ success: true, data: models });
      }

      case "bodyType": {
        if (!manufacturer || !model) {
          return json({ success: false, error: "Manufacturer and model are required" }, { status: 400 });
        }
        const bodyType = await getBodyType(manufacturer, model);
        return json({ success: true, data: bodyType });
      }

      default:
        return json({ success: false, error: "Invalid action" }, { status: 400 });
    }
  } catch (error) {
    console.error("Car dataset API error:", error);
    return json(
      { success: false, error: "Internal server error" },
      { status: 500 }
    );
  }
}