import { createCerebras } from '@ai-sdk/cerebras';
import { wrapLanguageModel } from 'ai';
import { createCerebrasV4Middleware } from '@ai-billing/cerebras';
import {
  consoleDestination,
  createObjectPriceResolver,
  type ModelPricing,
} from '@ai-billing/core';

const cerebras = createCerebras({ apiKey: process.env.CEREBRAS_API_KEY });

const customPricingMap: Record<string, ModelPricing> = {
  // NOTE: unverified estimate — confirm against https://www.cerebras.ai/pricing before shipping.
  'gpt-oss-120b': {
    promptTokens: 0.25 / 1_000_000,
    completionTokens: 0.69 / 1_000_000,
  },
};

const priceResolver = createObjectPriceResolver(customPricingMap);

const billingMiddleware = createCerebrasV4Middleware({
  destinations: [consoleDestination()],
  priceResolver,
});

const wrappedModel = wrapLanguageModel({
  model: cerebras('gpt-oss-120b'),
  middleware: billingMiddleware,
});