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{
  input: {
    person: {
      id: 1,
      name: 'hoge',
    },
    test: ['foo', 'bar', 'baz'],
  },
}

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[
  'input.person.id=1',
  'input.person.name="hoge"',
  'input.test=["foo","bar","baz"]',
]

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test('オブジェクトの展開', () => {
  const targetObject = {
    input: {
      person: {
        id: 1,
        name: 'hoge',
      },
      test: ['foo', 'bar', 'baz'],
    },
  }

  const actual = extractor([], targetObject).map(format)

  const expected = [
    'input.person.id=1',
    'input.person.name="hoge"',
    'input.test=["foo","bar","baz"]',
  ]

  expect(actual).toStrictEqual(expected)
  console.log(actual)
})

const extractor = (prevKeys: string[], obj: any): [string[], any][] => {
  if (typeof obj === 'object' && !Array.isArray(obj)) {
    return Object.entries(obj).flatMap(([k, v]) => extractor([...prevKeys, k], v))
  } else {
    return [[prevKeys, obj]]
  }
}
const format = ([k, v]: [string[], any]): string => `${k.join('.')}=${formatValue(v)}`

const formatValue = (v: any): string => {
  if (typeof v === 'string') return `"${v}"`
  if (Array.isArray(v)) return `[${v.map(formatValue).join(',')}]`
  return v
}

export {}