// The ShapeList manages the list of polylines which form a V2 layout.

var ShapeList = Fiber.extend(function(base){
  var exports = {}
  exports.init = function(){
    this.shapes = []
    this.workline = null
  }
  exports.add = function(shape){
    this.shapes.push(shape)
  }
  exports.remove = function(shape){
    var index = this.shapes.indexOf(shape)
    if (index !== -1) {
      this.shapes.splice(index, 1)
    }
  }
  exports.destroy = function(){
    this.shapes.forEach(function(shape){
      shape.destroy()
    })
    this.shapes = []
  }
  exports.count = function(){
    return this.shapes.length
  }
  exports.removeSegment = function (segment){
    var shape = segment.shape
    var head = shape.getHeadAtIndex(segment.head)
    var tail = shape.getTailAtIndex(segment.tail)
    this.remove(shape)
    shape.destroy()
    if (head) {
      this.add(head)
      head.build()
    }
    if (tail) {
      this.add(tail)
      tail.build()
    }
  }
  exports.findClosestPoint = function (p){
    var point
    for (var i = 0; i < this.shapes.length; i++) {
      point = this.shapes[i].hasPointNear(p)
      if (point) return { point: point, shape: this.shapes[i] }
    }
    return null
  }
  exports.findClosestEndPoint = function (p){
    var point
    for (var i = 0; i < this.shapes.length; i++) {
      point = this.shapes[i].hasEndPointNear(p)
      if (point) return { point: point, shape: this.shapes[i] }
    }
    return null
  }
  exports.findClosestSegment = function (p){
    var segment = null, closest_segment = null
    for (var i = 0; i < this.shapes.length; i++) {
      segment = this.shapes[i].hasSegmentNear(p, 10)
      if (segment && (! closest_segment || segment.distance < closest_segment.distance)) {
        closest_segment = segment
        closest_segment.shape = this.shapes[i]
      }
    }
    return closest_segment
  }
  exports.forEach = function(fn){
    this.shapes.forEach(fn)
  }
  exports.getAllSegments = function(){
    var segments = []
    this.shapes.forEach(function(shape){
      segments = segments.concat( shape.getSegments() )
    })
    return segments
  }
  exports.serialize = function(){
    return this.shapes.map(function(shape){
      return shape.serialize()
    })
  }
  exports.deserialize = function(data){
    data && data.forEach(function(points){
      var line = new Polyline()
      line.deserialize(points)
      line.build()
    }.bind(this))
  }
  return exports
})