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import R from 'ramda'

// <A, B> (path: Array<string>, fn: (value: A) => A, (val: B) => B) => B
export const updatePath = R.curry((path, fn, val) =>
  R.assocPath(path, fn(R.path(path, val)), val)
)

// Usage:
// updatePath(
//   ['foo'],
//   (val) => 'bar',
//   { foo: 'yolo' }
// )
//
// Output:
// { 'foo': 'bar' }

import R from 'ramda'

const mergePlan = (x, y) => {
  if(Array.isArray(x) && Array.isArray(y)) {
    return R.uniq(R.concat(x, y));
  }
  
  if(typeof x === 'object' && typeof y === 'object'){
    return R.mergeWith(mergePlan, x, y)
  }
  
  return y;
}

export const deepMerge = R.mergeWith(mergePlan)

// Usage:
// deepMerge(
//   { baz: ['yolo'], foo: 'bar' },
//   { baz: ['bar'], foo: 'yolo' }
// )
//
// Output:
// { 'baz': ['yolo', 'bar'], 'foo': 'yolo' }