import StringBuffer from '../../../../java/lang/StringBuffer'
import Location from '../geom/Location'
import Position from './Position'
export default class TopologyLocation {
  constructor() {
    TopologyLocation.constructor_.apply(this, arguments)
  }
  static constructor_() {
    this.location = null
    if (arguments.length === 1) {
      if (arguments[0] instanceof Array) {
        const location = arguments[0]
        this.init(location.length)
      } else if (Number.isInteger(arguments[0])) {
        const on = arguments[0]
        this.init(1)
        this.location[Position.ON] = on
      } else if (arguments[0] instanceof TopologyLocation) {
        const gl = arguments[0]
        this.init(gl.location.length)
        if (gl !== null) 
          for (let i = 0; i < this.location.length; i++) 
            this.location[i] = gl.location[i]
          
        
      }
    } else if (arguments.length === 3) {
      const on = arguments[0], left = arguments[1], right = arguments[2]
      this.init(3)
      this.location[Position.ON] = on
      this.location[Position.LEFT] = left
      this.location[Position.RIGHT] = right
    }
  }
  setAllLocations(locValue) {
    for (let i = 0; i < this.location.length; i++) 
      this.location[i] = locValue
    
  }
  isNull() {
    for (let i = 0; i < this.location.length; i++) 
      if (this.location[i] !== Location.NONE) return false
    
    return true
  }
  setAllLocationsIfNull(locValue) {
    for (let i = 0; i < this.location.length; i++) 
      if (this.location[i] === Location.NONE) this.location[i] = locValue
    
  }
  isLine() {
    return this.location.length === 1
  }
  merge(gl) {
    if (gl.location.length > this.location.length) {
      const newLoc = new Array(3).fill(null)
      newLoc[Position.ON] = this.location[Position.ON]
      newLoc[Position.LEFT] = Location.NONE
      newLoc[Position.RIGHT] = Location.NONE
      this.location = newLoc
    }
    for (let i = 0; i < this.location.length; i++) 
      if (this.location[i] === Location.NONE && i < gl.location.length) this.location[i] = gl.location[i]
    
  }
  getLocations() {
    return this.location
  }
  flip() {
    if (this.location.length <= 1) return null
    const temp = this.location[Position.LEFT]
    this.location[Position.LEFT] = this.location[Position.RIGHT]
    this.location[Position.RIGHT] = temp
  }
  toString() {
    const buf = new StringBuffer()
    if (this.location.length > 1) buf.append(Location.toLocationSymbol(this.location[Position.LEFT]))
    buf.append(Location.toLocationSymbol(this.location[Position.ON]))
    if (this.location.length > 1) buf.append(Location.toLocationSymbol(this.location[Position.RIGHT]))
    return buf.toString()
  }
  setLocations(on, left, right) {
    this.location[Position.ON] = on
    this.location[Position.LEFT] = left
    this.location[Position.RIGHT] = right
  }
  get(posIndex) {
    if (posIndex < this.location.length) return this.location[posIndex]
    return Location.NONE
  }
  isArea() {
    return this.location.length > 1
  }
  isAnyNull() {
    for (let i = 0; i < this.location.length; i++) 
      if (this.location[i] === Location.NONE) return true
    
    return false
  }
  setLocation() {
    if (arguments.length === 1) {
      const locValue = arguments[0]
      this.setLocation(Position.ON, locValue)
    } else if (arguments.length === 2) {
      const locIndex = arguments[0], locValue = arguments[1]
      this.location[locIndex] = locValue
    }
  }
  init(size) {
    this.location = new Array(size).fill(null)
    this.setAllLocations(Location.NONE)
  }
  isEqualOnSide(le, locIndex) {
    return this.location[locIndex] === le.location[locIndex]
  }
  allPositionsEqual(loc) {
    for (let i = 0; i < this.location.length; i++) 
      if (this.location[i] !== loc) return false
    
    return true
  }
}