import axios, { AxiosAdapter, AxiosResponse } from "axios";
import { createHash } from "crypto";
import { existsSync, mkdirSync, readFileSync, writeFileSync } from "fs";

function str2Sha512(data: string) {
  const hash = createHash('sha512')
  hash.update(data)
  return hash.digest('hex');
}

export const mfockAdapter: AxiosAdapter = async (config) => {
  const sha512 = str2Sha512(`${config.url} ${config.method}`);

  const dir = `./.cache/`;
  mkdirSync(dir, {
    recursive: true
  })
  const cacheFilePath = `${dir}/${sha512}.json`;

  if (existsSync(cacheFilePath)) {
    const cachedResponse: AxiosResponse = JSON.parse(readFileSync(cacheFilePath).toString('UTF-8'));
    return Promise.resolve(cachedResponse);
  } else {
    config.adapter = undefined; // disabled for calling own infinity

    const response = await axios.request(config)
    writeFileSync(cacheFilePath, JSON.stringify({
      status: response.status,
      statusText: response.statusText,
      config: response.config,
      data: response.data,
      headers: response.headers,
      request: undefined//response.request
    }))
    return response;
  }
}