function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

var Shape = require('../shape');

var Smooth = require('../util/smooth');

var bbox = require('../util/bbox');

var Polyline =
/*#__PURE__*/
function (_Shape) {
  _inheritsLoose(Polyline, _Shape);

  function Polyline() {
    return _Shape.apply(this, arguments) || this;
  }

  var _proto = Polyline.prototype;

  _proto._initProperties = function _initProperties() {
    _Shape.prototype._initProperties.call(this);

    this._attrs.canFill = true;
    this._attrs.canStroke = true;
    this._attrs.type = 'polyline';
  };

  _proto.getDefaultAttrs = function getDefaultAttrs() {
    return {
      points: null,
      lineWidth: 1,
      smooth: false
    };
  };

  _proto.createPath = function createPath(context) {
    var self = this;
    var attrs = self.get('attrs');
    var points = attrs.points,
        smooth = attrs.smooth;
    var filteredPoints = []; // filter the point which x or y is NaN

    for (var i = 0, len = points.length; i < len; i++) {
      var point = points[i];

      if (!isNaN(point.x) && !isNaN(point.y)) {
        filteredPoints.push(point);
      }
    }

    context.beginPath();

    if (filteredPoints.length) {
      context.moveTo(filteredPoints[0].x, filteredPoints[0].y);

      if (smooth) {
        var constaint = [[0, 0], [1, 1]];
        var sps = Smooth.smooth(filteredPoints, false, constaint);

        for (var _i = 0, n = sps.length; _i < n; _i++) {
          var sp = sps[_i];
          context.bezierCurveTo(sp[1], sp[2], sp[3], sp[4], sp[5], sp[6]);
        }
      } else {
        var _i2;

        var l;

        for (_i2 = 1, l = filteredPoints.length - 1; _i2 < l; _i2++) {
          context.lineTo(filteredPoints[_i2].x, filteredPoints[_i2].y);
        }

        context.lineTo(filteredPoints[l].x, filteredPoints[l].y);
      }
    }
  };

  _proto.calculateBox = function calculateBox() {
    var attrs = this.get('attrs');
    var points = attrs.points,
        smooth = attrs.smooth,
        lineWidth = attrs.lineWidth;

    if (smooth) {
      var newPoints = [];
      var constaint = [[0, 0], [1, 1]];
      var sps = Smooth.smooth(points, false, constaint);

      for (var i = 0, n = sps.length; i < n; i++) {
        var sp = sps[i];

        if (i === 0) {
          newPoints.push([points[0].x, points[0].y, sp[1], sp[2], sp[3], sp[4], sp[5], sp[6]]);
        } else {
          var lastPoint = sps[i - 1];
          newPoints.push([lastPoint[5], lastPoint[6], sp[1], sp[2], sp[3], sp[4], sp[5], sp[6]]);
        }
      }

      return bbox.getBBoxFromBezierGroup(newPoints, lineWidth);
    }

    return bbox.getBBoxFromPoints(points, lineWidth);
  };

  return Polyline;
}(Shape);

Shape.Polyline = Polyline;
module.exports = Polyline;