const express = require('express')
const fs = require('fs')
const path = require('path')
const app = express()
const banks = fs.fileReadSync(path.resolve(__dirname, 'path/to/data/banks-all.json'))
const bins = fs.fileReadSync(path.resolve(__dirname, 'path/to/data/bins-all.json'))
const withLogos = bank => {
  return {
    ...bank,
    bankLogoBigOriginalSvg: bank.bankAlias + '-big-original.svg',
    bankLogoBigInvertedSvg: bank.bankAlias + '-big-inverted.svg',
    bankLogoSmallOriginalSvg: bank.bankAlias + '-small-original.svg',
    bankLogoSmallInvertedSvg: bank.bankAlias + '-small-inverted.svg',
    formBankLogoBigSvg: bank.bankAlias + '-big-' + bank.formLogoScheme + '.svg',
    formBankLogoSmallSvg: bank.bankAlias + '-small-' + bank.formLogoScheme + '.svg',
  }
}
app.get('/form', (req, res) => {
  const { cardNumber } = req.query
  const cardNumberCuted = cardNumber.replace(/D/g, '').substr(0, 6)
  const bankAlias = bins[cardNumberCuted]
  const bank = banks[bankAlias]
  if (!bank) return res.send('null')
  res.send(withLogos(bank))
})
app.get('/bank', (req, res) => {
  const { bankAlias } = req.query
  const bank = banks[bankAlias]
  if (!bank) return res.send('null')
  res.send(withLogos(bank))
})
app.get('/banks', (req, res) => {
  const { banksAliases } = req.query
  const result = banksAliases.split(',').map(bankAlias => {
    const bank = banks[bankAlias]
    return bank ? withLogos(bank) : null
  })
  res.send(result)
})