(function() {
  var BOUNDS_FORMAT, MIRROR_ATTACH, defer, extend, getBoundingRect, getBounds, getOuterSize, getSize, updateClasses, _ref,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

  _ref = this.Tether.Utils, getOuterSize = _ref.getOuterSize, getBounds = _ref.getBounds, getSize = _ref.getSize, extend = _ref.extend, updateClasses = _ref.updateClasses, defer = _ref.defer;

  MIRROR_ATTACH = {
    left: 'right',
    right: 'left',
    top: 'bottom',
    bottom: 'top',
    middle: 'middle'
  };

  BOUNDS_FORMAT = ['left', 'top', 'right', 'bottom'];

  getBoundingRect = function(tether, to) {
    var i, pos, side, size, style, _i, _len;
    if (to === 'scrollParent') {
      to = tether.scrollParent;
    } else if (to === 'window') {
      to = [pageXOffset, pageYOffset, innerWidth + pageXOffset, innerHeight + pageYOffset];
    }
    if (to === document) {
      to = to.documentElement;
    }
    if (to.nodeType != null) {
      pos = size = getBounds(to);
      style = getComputedStyle(to);
      to = [pos.left, pos.top, size.width + pos.left, size.height + pos.top];
      for (i = _i = 0, _len = BOUNDS_FORMAT.length; _i < _len; i = ++_i) {
        side = BOUNDS_FORMAT[i];
        side = side[0].toUpperCase() + side.substr(1);
        if (side === 'Top' || side === 'Left') {
          to[i] += parseFloat(style["border" + side + "Width"]);
        } else {
          to[i] -= parseFloat(style["border" + side + "Width"]);
        }
      }
    }
    return to;
  };

  this.Tether.modules.push({
    position: function(_arg) {
      var addClasses, allClasses, attachment, bounds, changeAttachX, changeAttachY, cls, constraint, eAttachment, height, left, oob, oobClass, p, pin, pinned, pinnedClass, removeClass, side, tAttachment, targetAttachment, targetHeight, targetSize, targetWidth, to, top, width, _i, _j, _k, _l, _len, _len1, _len2, _len3, _len4, _len5, _m, _n, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8,
        _this = this;
      top = _arg.top, left = _arg.left, targetAttachment = _arg.targetAttachment;
      if (!this.options.constraints) {
        return true;
      }
      removeClass = function(prefix) {
        var side, _i, _len, _results;
        _this.removeClass(prefix);
        _results = [];
        for (_i = 0, _len = BOUNDS_FORMAT.length; _i < _len; _i++) {
          side = BOUNDS_FORMAT[_i];
          _results.push(_this.removeClass("" + prefix + "-" + side));
        }
        return _results;
      };
      _ref1 = this.cache('element-bounds', function() {
        return getBounds(_this.element);
      }), height = _ref1.height, width = _ref1.width;
      if (width === 0 && height === 0 && (this.lastSize != null)) {
        _ref2 = this.lastSize, width = _ref2.width, height = _ref2.height;
      }
      targetSize = this.cache('target-bounds', function() {
        return _this.getTargetBounds();
      });
      targetHeight = targetSize.height;
      targetWidth = targetSize.width;
      tAttachment = {};
      eAttachment = {};
      allClasses = [this.getClass('pinned'), this.getClass('out-of-bounds')];
      _ref3 = this.options.constraints;
      for (_i = 0, _len = _ref3.length; _i < _len; _i++) {
        constraint = _ref3[_i];
        if (constraint.outOfBoundsClass) {
          allClasses.push(constraint.outOfBoundsClass);
        }
        if (constraint.pinnedClass) {
          allClasses.push(constraint.pinnedClass);
        }
      }
      for (_j = 0, _len1 = allClasses.length; _j < _len1; _j++) {
        cls = allClasses[_j];
        _ref4 = ['left', 'top', 'right', 'bottom'];
        for (_k = 0, _len2 = _ref4.length; _k < _len2; _k++) {
          side = _ref4[_k];
          allClasses.push("" + cls + "-" + side);
        }
      }
      addClasses = [];
      tAttachment = extend({}, targetAttachment);
      eAttachment = extend({}, this.attachment);
      _ref5 = this.options.constraints;
      for (_l = 0, _len3 = _ref5.length; _l < _len3; _l++) {
        constraint = _ref5[_l];
        to = constraint.to, attachment = constraint.attachment, pin = constraint.pin;
        if (attachment == null) {
          attachment = '';
        }
        if (__indexOf.call(attachment, ' ') >= 0) {
          _ref6 = attachment.split(' '), changeAttachY = _ref6[0], changeAttachX = _ref6[1];
        } else {
          changeAttachX = changeAttachY = attachment;
        }
        bounds = getBoundingRect(this, to);
        if (changeAttachY === 'target' || changeAttachY === 'both') {
          if (top < bounds[1] && tAttachment.top === 'top') {
            top += targetHeight;
            tAttachment.top = 'bottom';
          }
          if (top + height > bounds[3] && tAttachment.top === 'bottom') {
            top -= targetHeight;
            tAttachment.top = 'top';
          }
        }
        if (changeAttachY === 'together') {
          if (top < bounds[1] && tAttachment.top === 'top') {
            if (eAttachment.top === 'bottom') {
              top += targetHeight;
              tAttachment.top = 'bottom';
              top += height;
              eAttachment.top = 'top';
            } else if (eAttachment.top === 'top') {
              top += targetHeight;
              tAttachment.top = 'bottom';
              top -= height;
              eAttachment.top = 'bottom';
            }
          }
          if (top + height > bounds[3] && tAttachment.top === 'bottom') {
            if (eAttachment.top === 'top') {
              top -= targetHeight;
              tAttachment.top = 'top';
              top -= height;
              eAttachment.top = 'bottom';
            } else if (eAttachment.top === 'bottom') {
              top -= targetHeight;
              tAttachment.top = 'top';
              top += height;
              eAttachment.top = 'top';
            }
          }
          if (tAttachment.top === 'middle') {
            if (top + height > bounds[3] && eAttachment.top === 'top') {
              top -= height;
              eAttachment.top = 'bottom';
            } else if (top < bounds[1] && eAttachment.top === 'bottom') {
              top += height;
              eAttachment.top = 'top';
            }
          }
        }
        if (changeAttachX === 'target' || changeAttachX === 'both') {
          if (left < bounds[0] && tAttachment.left === 'left') {
            left += targetWidth;
            tAttachment.left = 'right';
          }
          if (left + width > bounds[2] && tAttachment.left === 'right') {
            left -= targetWidth;
            tAttachment.left = 'left';
          }
        }
        if (changeAttachX === 'together') {
          if (left < bounds[0] && tAttachment.left === 'left') {
            if (eAttachment.left === 'right') {
              left += targetWidth;
              tAttachment.left = 'right';
              left += width;
              eAttachment.left = 'left';
            } else if (eAttachment.left === 'left') {
              left += targetWidth;
              tAttachment.left = 'right';
              left -= width;
              eAttachment.left = 'right';
            }
          } else if (left + width > bounds[2] && tAttachment.left === 'right') {
            if (eAttachment.left === 'left') {
              left -= targetWidth;
              tAttachment.left = 'left';
              left -= width;
              eAttachment.left = 'right';
            } else if (eAttachment.left === 'right') {
              left -= targetWidth;
              tAttachment.left = 'left';
              left += width;
              eAttachment.left = 'left';
            }
          } else if (tAttachment.left === 'center') {
            if (left + width > bounds[2] && eAttachment.left === 'left') {
              left -= width;
              eAttachment.left = 'right';
            } else if (left < bounds[0] && eAttachment.left === 'right') {
              left += width;
              eAttachment.left = 'left';
            }
          }
        }
        if (changeAttachY === 'element' || changeAttachY === 'both') {
          if (top < bounds[1] && eAttachment.top === 'bottom') {
            top += height;
            eAttachment.top = 'top';
          }
          if (top + height > bounds[3] && eAttachment.top === 'top') {
            top -= height;
            eAttachment.top = 'bottom';
          }
        }
        if (changeAttachX === 'element' || changeAttachX === 'both') {
          if (left < bounds[0] && eAttachment.left === 'right') {
            left += width;
            eAttachment.left = 'left';
          }
          if (left + width > bounds[2] && eAttachment.left === 'left') {
            left -= width;
            eAttachment.left = 'right';
          }
        }
        if (typeof pin === 'string') {
          pin = (function() {
            var _len4, _m, _ref7, _results;
            _ref7 = pin.split(',');
            _results = [];
            for (_m = 0, _len4 = _ref7.length; _m < _len4; _m++) {
              p = _ref7[_m];
              _results.push(p.trim());
            }
            return _results;
          })();
        } else if (pin === true) {
          pin = ['top', 'left', 'right', 'bottom'];
        }
        pin || (pin = []);
        pinned = [];
        oob = [];
        if (top < bounds[1]) {
          if (__indexOf.call(pin, 'top') >= 0) {
            top = bounds[1];
            pinned.push('top');
          } else {
            oob.push('top');
          }
        }
        if (top + height > bounds[3]) {
          if (__indexOf.call(pin, 'bottom') >= 0) {
            top = bounds[3] - height;
            pinned.push('bottom');
          } else {
            oob.push('bottom');
          }
        }
        if (left < bounds[0]) {
          if (__indexOf.call(pin, 'left') >= 0) {
            left = bounds[0];
            pinned.push('left');
          } else {
            oob.push('left');
          }
        }
        if (left + width > bounds[2]) {
          if (__indexOf.call(pin, 'right') >= 0) {
            left = bounds[2] - width;
            pinned.push('right');
          } else {
            oob.push('right');
          }
        }
        if (pinned.length) {
          pinnedClass = (_ref7 = this.options.pinnedClass) != null ? _ref7 : this.getClass('pinned');
          addClasses.push(pinnedClass);
          for (_m = 0, _len4 = pinned.length; _m < _len4; _m++) {
            side = pinned[_m];
            addClasses.push("" + pinnedClass + "-" + side);
          }
        }
        if (oob.length) {
          oobClass = (_ref8 = this.options.outOfBoundsClass) != null ? _ref8 : this.getClass('out-of-bounds');
          addClasses.push(oobClass);
          for (_n = 0, _len5 = oob.length; _n < _len5; _n++) {
            side = oob[_n];
            addClasses.push("" + oobClass + "-" + side);
          }
        }
        if (__indexOf.call(pinned, 'left') >= 0 || __indexOf.call(pinned, 'right') >= 0) {
          eAttachment.left = tAttachment.left = false;
        }
        if (__indexOf.call(pinned, 'top') >= 0 || __indexOf.call(pinned, 'bottom') >= 0) {
          eAttachment.top = tAttachment.top = false;
        }
        if (tAttachment.top !== targetAttachment.top || tAttachment.left !== targetAttachment.left || eAttachment.top !== this.attachment.top || eAttachment.left !== this.attachment.left) {
          this.updateAttachClasses(eAttachment, tAttachment);
        }
      }
      defer(function() {
        updateClasses(_this.target, addClasses, allClasses);
        return updateClasses(_this.element, addClasses, allClasses);
      });
      return {
        top: top,
        left: left
      };
    }
  });

}).call(this);