import axios from 'axios'
import express, { Request } from 'express'
import { env } from './env'
import { BearerParser } from 'bearer-token-parser'
import jwt_decode from 'jwt-decode'
import { JwtToken } from './types'

export const decodeToken = (headers: object): JwtToken | undefined => {
  const encodedToken = BearerParser.parseBearerToken(headers)
  console.log(`[Token] ${JSON.stringify(encodedToken)}`)
  var token = jwt_decode(encodedToken) as JwtToken
  return token
}

export const pick = <Obj extends object, Keys extends keyof Obj>(
  obj: Obj,
  keys: Keys[]
) => {
  let ans = {} as { [Key in Keys]: Obj[Key] }
  for (let k of keys) {
    if (obj && obj.hasOwnProperty(k)) {
      ans[k] = obj[k]
    }
  }
  return ans
}

const stringifyErr = (e: unknown) => {
  if (axios.isAxiosError(e))
    return (
      `${e.name} ${e.code || e.response?.status || ''} ${
        e.response?.statusText || ''
      }:` +
      `${e.config.method} ${e.config.baseURL || ''}${
        e.config.url || ''
      }\n${JSON.stringify(e.response?.data)}`
    )

  if (e instanceof Error) return `${e.name}: ${e.message}\n${e.stack}`

  return JSON.stringify(e)
}

export const exressHandleError: express.ErrorRequestHandler = (
  err,
  req,
  res,
  next
) => {
  const error = stringifyErr(err)
  console.error(error)
  res.status(400).json({ error: error })
}