import { createZai } from '@ai-sdk/zai';
import { wrapLanguageModel } from 'ai';
import { createZaiV4Middleware } from '@ai-billing/zai';
import {
  consoleDestination,
  createObjectPriceResolver,
  type ModelPricing,
} from '@ai-billing/core';

const zai = createZai({ apiKey: process.env.ZAI_API_KEY });

const customPricingMap: Record<string, ModelPricing> = {
  'glm-5.3': {
    promptTokens: 1.4 / 1_000_000,
    completionTokens: 4.4 / 1_000_000,
    inputCacheReadTokens: 0.26 / 1_000_000,
  },
};

const priceResolver = createObjectPriceResolver(customPricingMap);

const billingMiddleware = createZaiV4Middleware({
  destinations: [consoleDestination()],
  priceResolver,
});

const wrappedModel = wrapLanguageModel({
  model: zai('glm-5.3'),
  middleware: billingMiddleware,
});