import Cors from 'cors'
import { NextApiRequest, NextApiResponse } from 'next'
import { SSR_CONFIG } from '@SSR_CONFIG'

// Helper method to wait for a middleware to execute before continuing
// And to throw an error when an error happens in a middleware
const initMiddleware =
  (middleware: any) => (req: NextApiRequest, res: NextApiResponse) =>
    new Promise((resolve, reject) => {
      middleware(req, res, (result: any) => {
        if (result instanceof Error) {
          return reject(result)
        }
        return resolve(result)
      })
    })

export const corsMiddleware = initMiddleware(
  Cors({
    // Only allow requests with GET, POST and OPTIONS
    methods: ['GET', 'OPTIONS', 'POST'],
    origin: [
      ...SSR_CONFIG.corsWhitelistDomains,
      ...['http://localhost:6006', 'http://localhost:3000']
    ]
  })
)