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const objectKeys = require('./obj-keys')
const is = require('./obj-is')
const contains = require('./functional-tools').contains
const map = require('./functional-tools').map

exports.filterByCriteria = function filterByCriteria (criteria) {
  return function filterByCriteria (dataset) {
    let matches = [].concat(dataset)
    const isArray = is('Array')

    function isEqual (item1, item2) {
      return item1 === item2
    }

    for (let key of objectKeys(criteria)) {
      matches = matches.filter(datasetItem => {

        let normDtItem = isArray(datasetItem[key]) ? datasetItem[key] : [].concat(datasetItem[key])
        let normCriterias = isArray(criteria[key]) ? criteria[key] : [].concat(criteria[key])

        for (let item of normDtItem) {
          for (let criteriaItem of normCriterias) {
            if (isEqual(item, criteriaItem)) {
              return true
            }
          }
        }

      })
    }

    return matches
  }
}