import { ActionName } from "../core/scope.js";
import * as arr from "../utils/arr.js";
import * as is from "../utils/is.js";
ActionName.Drag = 'drag';

function install(scope) {
  const {
    actions,
    Interactable,
    defaults
  } = scope;
  Interactable.prototype.draggable = drag.draggable;
  actions[ActionName.Drag] = drag;
  actions.names.push(ActionName.Drag);
  arr.merge(actions.eventTypes, ['dragstart', 'dragmove', 'draginertiastart', 'dragresume', 'dragend']);
  actions.methodDict.drag = 'draggable';
  defaults.actions.drag = drag.defaults;
}

function beforeMove({
  interaction
}) {
  if (interaction.prepared.name !== 'drag') {
    return;
  }

  const axis = interaction.prepared.axis;

  if (axis === 'x') {
    interaction.coords.cur.page.y = interaction.coords.start.page.y;
    interaction.coords.cur.client.y = interaction.coords.start.client.y;
    interaction.coords.velocity.client.y = 0;
    interaction.coords.velocity.page.y = 0;
  } else if (axis === 'y') {
    interaction.coords.cur.page.x = interaction.coords.start.page.x;
    interaction.coords.cur.client.x = interaction.coords.start.client.x;
    interaction.coords.velocity.client.x = 0;
    interaction.coords.velocity.page.x = 0;
  }
}

function move({
  iEvent,
  interaction
}) {
  if (interaction.prepared.name !== 'drag') {
    return;
  }

  const axis = interaction.prepared.axis;

  if (axis === 'x' || axis === 'y') {
    const opposite = axis === 'x' ? 'y' : 'x';
    iEvent.page[opposite] = interaction.coords.start.page[opposite];
    iEvent.client[opposite] = interaction.coords.start.client[opposite];
    iEvent.delta[opposite] = 0;
  }
}
/**
 * ```js
 * interact(element).draggable({
 *     onstart: function (event) {},
 *     onmove : function (event) {},
 *     onend  : function (event) {},
 *
 *     // the axis in which the first movement must be
 *     // for the drag sequence to start
 *     // 'xy' by default - any direction
 *     startAxis: 'x' || 'y' || 'xy',
 *
 *     // 'xy' by default - don't restrict to one axis (move in any direction)
 *     // 'x' or 'y' to restrict movement to either axis
 *     // 'start' to restrict movement to the axis the drag started in
 *     lockAxis: 'x' || 'y' || 'xy' || 'start',
 *
 *     // max number of drags that can happen concurrently
 *     // with elements of this Interactable. Infinity by default
 *     max: Infinity,
 *
 *     // max number of drags that can target the same element+Interactable
 *     // 1 by default
 *     maxPerElement: 2
 * })
 *
 * var isDraggable = interact('element').draggable(); // true
 * ```
 *
 * Get or set whether drag actions can be performed on the target
 *
 * @alias Interactable.prototype.draggable
 *
 * @param {boolean | object} [options] true/false or An object with event
 * listeners to be fired on drag events (object makes the Interactable
 * draggable)
 * @return {boolean | Interactable} boolean indicating if this can be the
 * target of drag events, or this Interctable
 */


const draggable = function draggable(options) {
  if (is.object(options)) {
    this.options.drag.enabled = options.enabled !== false;
    this.setPerAction(ActionName.Drag, options);
    this.setOnEvents(ActionName.Drag, options);

    if (/^(xy|x|y|start)$/.test(options.lockAxis)) {
      this.options.drag.lockAxis = options.lockAxis;
    }

    if (/^(xy|x|y)$/.test(options.startAxis)) {
      this.options.drag.startAxis = options.startAxis;
    }

    return this;
  }

  if (is.bool(options)) {
    this.options.drag.enabled = options;
    return this;
  }

  return this.options.drag;
};

const drag = {
  id: 'actions/drag',
  install,
  listeners: {
    'interactions:before-action-move': beforeMove,
    'interactions:action-resume': beforeMove,
    // dragmove
    'interactions:action-move': move,
    'auto-start:check': arg => {
      const {
        interaction,
        interactable,
        buttons
      } = arg;
      const dragOptions = interactable.options.drag;

      if (!(dragOptions && dragOptions.enabled) || // check mouseButton setting if the pointer is down
      interaction.pointerIsDown && /mouse|pointer/.test(interaction.pointerType) && (buttons & interactable.options.drag.mouseButtons) === 0) {
        return undefined;
      }

      arg.action = {
        name: ActionName.Drag,
        axis: dragOptions.lockAxis === 'start' ? dragOptions.startAxis : dragOptions.lockAxis
      };
      return false;
    }
  },
  draggable,
  beforeMove,
  move,
  defaults: {
    startAxis: 'xy',
    lockAxis: 'xy'
  },

  getCursor() {
    return 'move';
  }

};
export default drag;
//# sourceMappingURL=drag.js.map