import { delimiter } from '../modules/core/regex.js'
import { extend } from '../utils/adopter.js'
import { subClassArray } from './ArrayPolyfill.js'

const SVGArray = subClassArray('SVGArray', Array, function (arr) {
  this.init(arr)
})

export default SVGArray

extend(SVGArray, {
  init (arr) {
    // This catches the case, that native map tries to create an array with new Array(1)
    if (typeof arr === 'number') return this
    this.length = 0
    this.push(...this.parse(arr))
    return this
  },

  toArray () {
    return Array.prototype.concat.apply([], this)
  },

  toString () {
    return this.join(' ')
  },

  // Flattens the array if needed
  valueOf () {
    const ret = []
    ret.push(...this)
    return ret
  },

  // Parse whitespace separated string
  parse (array = []) {
    // If already is an array, no need to parse it
    if (array instanceof Array) return array

    return array.trim().split(delimiter).map(parseFloat)
  },

  clone () {
    return new this.constructor(this)
  },

  toSet () {
    return new Set(this)
  }
})