import { createDeepSeek } from '@ai-sdk/deepseek';
import { wrapLanguageModel } from 'ai';
import { createDeepSeekV4Middleware } from '@ai-billing/deepseek';
import {
  consoleDestination,
  createObjectPriceResolver,
  type ModelPricing,
} from '@ai-billing/core';

const deepseek = createDeepSeek({ apiKey: process.env.DEEPSEEK_API_KEY });

const customPricingMap: Record<string, ModelPricing> = {
  'deepseek-chat': {
    promptTokens: 0.27 / 1_000_000,
    completionTokens: 1.10 / 1_000_000,
    inputCacheReadTokens: 0.07 / 1_000_000,
    inputCacheWriteTokens: 0,
  },
  'deepseek-reasoner': {
    promptTokens: 0.55 / 1_000_000,
    completionTokens: 2.19 / 1_000_000,
    inputCacheReadTokens: 0.14 / 1_000_000,
    inputCacheWriteTokens: 0,
    internalReasoningTokens: 2.19 / 1_000_000,
  },
};

const priceResolver = createObjectPriceResolver(customPricingMap);

const billingMiddleware = createDeepSeekV4Middleware({
  destinations: [consoleDestination()],
  priceResolver,
});

const wrappedModel = wrapLanguageModel({
  model: deepseek('deepseek-chat'),
  middleware: billingMiddleware,
});