import R from 'ramda'

// This array can't be generated, as the arguments to require.context must be literals :-|
let directoryLoaders = 
  [
    require.context('../../règles/rémunération-travail/cdd',
                    true, /([A-Za-z\u00C0-\u017F]|\.|-|_)+.yaml$/),
    require.context('../../règles/rémunération-travail/entités/ok',
                    true, /([A-Za-z\u00C0-\u017F]|\.|-|_)+.yaml$/),
    require.context('../../règles/rémunération-travail/cotisations/ok',
                    true, /([A-Za-z\u00C0-\u017F]|\.|-|_)+.yaml$/),
  ]

// require.context returns an object which
// a) is a function behaving like 'requires', taking a filename and returning a module and
// b) has additional properties, some function-valued; keys() returns the files matched
// A "module" is simply the contents of a file according to a Webpack loader; this can be JS, JSON, etc.
// Thus, this weird loadAll returns an array, each item of which is the contents of each file in a directory
let loadAll = directoryLoaderFunction =>
  directoryLoaderFunction.keys().map(directoryLoaderFunction)

let rules = R.pipe(
  R.map(loadAll),
  R.flatten,
  R.reject(R.isNil)
)(directoryLoaders)

export default rules