buckets-of-fun/main.js

#!/usr/bin/env node

const { fromJSON } = require('./buckets')

const usage = `main.js target bucket [bucket...]

target: volume of bucket to search for
bucket: volume of bucket
`

function bail() {
  console.log(usage);
  process.exit(1)
}

const args = [...process.argv].slice(2)

if (args.length < 2) {
  bail();
}

const intArgs = args.map(arg => Number.parseInt(arg, 10))

const hasNaN = intArgs.find(arg => Number.isNaN(arg))
if (hasNaN) {
  bail();
}

const target = intArgs[0];

const bucketsJSON = intArgs.slice(1).map(capacity => ({ capacity }))

const buckets = fromJSON({ buckets: bucketsJSON })

const result = buckets.findTarget(target)

if (result.length === 0) {
  console.log('No results')
}

if (result.length === 1) {
  console.log('1 solution')
}

if (result.length > 1) {
  console.log(`${result.length} solutions`)
}

result.forEach((actions, i) => {
  console.log(`solution ${i + 1}`)
  const copy = fromJSON(buckets);
  actions.forEach(action => {
    copy.performAction(action)
    console.log(`${action.string()} resulting in ${copy.string()}`)
  })
});