import { createRequire } from "node:module";

type ProviderRuntimeModule = Pick<
  typeof import("../plugins/provider-runtime.js"),
  "normalizeProviderModelIdWithPlugin"
>;

const require = createRequire(import.meta.url);
const PROVIDER_RUNTIME_CANDIDATES = [
  "../plugins/provider-runtime.js",
  "../plugins/provider-runtime.ts",
] as const;

let providerRuntimeModule: ProviderRuntimeModule | undefined;

function loadProviderRuntime(): ProviderRuntimeModule | null {
  if (providerRuntimeModule) {
    return providerRuntimeModule;
  }
  for (const candidate of PROVIDER_RUNTIME_CANDIDATES) {
    try {
      providerRuntimeModule = require(candidate) as ProviderRuntimeModule;
      return providerRuntimeModule;
    } catch {
      // Try source/runtime candidates in order.
    }
  }
  return null;
}

export function normalizeProviderModelIdWithRuntime(params: {
  provider: string;
  context: {
    provider: string;
    modelId: string;
  };
}): string | undefined {
  return loadProviderRuntime()?.normalizeProviderModelIdWithPlugin(params);
}