import hasInterface from '../../../../hasInterface'
import Collection from '../../../../java/util/Collection'
import OrientedCoordinateArray from './OrientedCoordinateArray'
import SegmentString from './SegmentString'
import CoordinateArrays from '../geom/CoordinateArrays'
import TreeMap from '../../../../java/util/TreeMap'
export default class SegmentStringDissolver {
  constructor() {
    SegmentStringDissolver.constructor_.apply(this, arguments)
  }
  static constructor_() {
    this._merger = null
    this._ocaMap = new TreeMap()
    if (arguments.length === 0) {
      SegmentStringDissolver.constructor_.call(this, null)
    } else if (arguments.length === 1) {
      const merger = arguments[0]
      this._merger = merger
    }
  }
  findMatching(oca, segString) {
    const matchSS = this._ocaMap.get(oca)
    return matchSS
  }
  getDissolved() {
    return this._ocaMap.values()
  }
  dissolve() {
    if (hasInterface(arguments[0], Collection)) {
      const segStrings = arguments[0]
      for (let i = segStrings.iterator(); i.hasNext(); ) 
        this.dissolve(i.next())
      
    } else if (hasInterface(arguments[0], SegmentString)) {
      const segString = arguments[0]
      const oca = new OrientedCoordinateArray(segString.getCoordinates())
      const existing = this.findMatching(oca, segString)
      if (existing === null) {
        this.add(oca, segString)
      } else 
      if (this._merger !== null) {
        const isSameOrientation = CoordinateArrays.equals(existing.getCoordinates(), segString.getCoordinates())
        this._merger.merge(existing, segString, isSameOrientation)
      }
      
    }
  }
  add(oca, segString) {
    this._ocaMap.put(oca, segString)
  }
}
function SegmentStringMerger() {}
SegmentStringDissolver.SegmentStringMerger = SegmentStringMerger