import { createOpenAI } from '@ai-sdk/openai';
import { wrapLanguageModel } from 'ai';
import { createOpenAIV4Middleware } from '@ai-billing/openai';
import {
  consoleDestination,
  createObjectPriceResolver,
  type ModelPricing,
} from '@ai-billing/core';

const openai = createOpenAI({ apiKey: process.env.OPENAI_API_KEY });

const customPricingMap: Record<string, ModelPricing> = {
  'gpt-5': {
    promptTokens: 1.25 / 1_000_000,
    completionTokens: 10.0 / 1_000_000,
    inputCacheReadTokens: 0.125 / 1_000_000,
  },
  'gpt-4o': {
    promptTokens: 5.0 / 1_000_000,
    completionTokens: 15.0 / 1_000_000,
  },
};

const priceResolver = createObjectPriceResolver(customPricingMap);

const billingMiddleware = createOpenAIV4Middleware({
  destinations: [consoleDestination()],
  priceResolver,
});

const wrappedModel = wrapLanguageModel({
  model: openai('gpt-5'),
  middleware: billingMiddleware,
});