const fs = require('fs')
const path = require('path')
const ndjson = require('ndjson')
const { mean, median, min, max } = require('simple-statistics')

const readFile = (...paths) => {
  const a = []
  const filename = path.join(...paths)
  return new Promise(resolve => {
    fs.createReadStream(filename)
      .pipe(ndjson.parse())
      .on('data', obj => a.push(obj))
      .on('end', () => resolve(a))
  })
}

function computeSignatureRequestStats(signatureRequests, senderHome) {
  const processingLogs = signatureRequests.filter(x => x.eventTransactionHash)
  const txSentMap = senderHome.filter(x => x.eventTransactionHash).reduce((acc, x) => {
    acc[x.eventTransactionHash] = x
    return acc
  }, {})

  const times = processingLogs.map(x => txSentMap[x.eventTransactionHash].time - x.time)

  return {
    count: times.length,
    mean: mean(times),
    median: median(times),
    min: min(times),
    max: max(times)
  }
}

function computeCollectedSignaturesStats(collectedSignatures, senderForeign) {
  const processingLogs = collectedSignatures.filter(x => x.eventTransactionHash)
  const txSentMap = senderForeign.filter(x => x.eventTransactionHash).reduce((acc, x) => {
    acc[x.eventTransactionHash] = x
    return acc
  }, {})

  const times = processingLogs.map(x => txSentMap[x.eventTransactionHash].time - x.time)

  return {
    count: times.length,
    mean: mean(times),
    median: median(times),
    min: min(times),
    max: max(times)
  }
}

async function main() {
  const signatureRequests = await readFile(__dirname, '../logs/signature-request-watcher.txt')
  const collectedSignatures = await readFile(__dirname, '../logs/collected-signatures-watcher.txt')
  // const affirmationRequests = await readFile(__dirname, '../logs/affirmation-request-watcher.txt')
  const senderHome = await readFile(__dirname, '../logs/home-sender.txt')
  const senderForeign = await readFile(__dirname, '../logs/foreign-sender.txt')

  const signatureRequestsStats = computeSignatureRequestStats(signatureRequests, senderHome)
  console.log('Signature Requests')
  console.log(signatureRequestsStats)

  const collectedSignaturesStats = computeCollectedSignaturesStats(
    collectedSignatures,
    senderForeign
  )
  console.log('Collected Signatures')
  console.log(collectedSignaturesStats)
}

main().catch(console.error)