summarize

#!/usr/bin/env node
const fs = require('fs')

const json = fs.readFileSync(process.argv[2], 'utf8')
const path = require('path')
const schema = JSON.parse(json)

write(schema.$id + ':\n')
describe(schema, 1)

function describe (schema, level) {
  const required = schema.required
  const properties = schema.properties
  const indent = '  '.repeat(level)
  Object.keys(properties).sort().forEach(key => {
    write(indent)
    write(key)
    if (!required.includes(key)) {
      write(' (optional)')
    }
    write(':')

    const subschema = properties[key]
    if (subschema.$ref) {
      write(' ' + path.basename(subschema.$ref, '.json') + '\n')
    } else if (subschema.type === 'string' && subschema.format) {
      write(' ' + subschema.format + '\n')
    } else if (subschema.type === 'string' && subschema.pattern) {
      write(' ' + subschema.pattern + '\n')
    } else if (subschema.const) {
      write(' ' + subschema.const + '\n')
    } else if (subschema.type === 'object') {
      write('\n')
      describe(subschema, level + 1)
    } else if (subschema.type === 'array') {
      write(' [array]\n')
      describe(subschema.items, level + 1)
    } else {
      write(' ' + subschema.type + '\n')
    }
  })
}

function write (string) {
  process.stdout.write(string)
}