var zrUtil = require("zrender/lib/core/util");

/**
 * Data selectable mixin for chart series.
 * To eanble data select, option of series must have `selectedMode`.
 * And each data item will use `selected` to toggle itself selected status
 */
var _default = {
  /**
   * @param {Array.<Object>} targetList [{name, value, selected}, ...]
   *        If targetList is an array, it should like [{name: ..., value: ...}, ...].
   *        If targetList is a "List", it must have coordDim: 'value' dimension and name.
   */
  updateSelectedMap: function (targetList) {
    this._targetList = zrUtil.isArray(targetList) ? targetList.slice() : [];
    this._selectTargetMap = zrUtil.reduce(targetList || [], function (targetMap, target) {
      targetMap.set(target.name, target);
      return targetMap;
    }, zrUtil.createHashMap());
  },

  /**
   * Either name or id should be passed as input here.
   * If both of them are defined, id is used.
   *
   * @param {string|undefined} name name of data
   * @param {number|undefined} id dataIndex of data
   */
  // PENGING If selectedMode is null ?
  select: function (name, id) {
    var target = id != null ? this._targetList[id] : this._selectTargetMap.get(name);
    var selectedMode = this.get('selectedMode');

    if (selectedMode === 'single') {
      this._selectTargetMap.each(function (target) {
        target.selected = false;
      });
    }

    target && (target.selected = true);
  },

  /**
   * Either name or id should be passed as input here.
   * If both of them are defined, id is used.
   *
   * @param {string|undefined} name name of data
   * @param {number|undefined} id dataIndex of data
   */
  unSelect: function (name, id) {
    var target = id != null ? this._targetList[id] : this._selectTargetMap.get(name); // var selectedMode = this.get('selectedMode');
    // selectedMode !== 'single' && target && (target.selected = false);

    target && (target.selected = false);
  },

  /**
   * Either name or id should be passed as input here.
   * If both of them are defined, id is used.
   *
   * @param {string|undefined} name name of data
   * @param {number|undefined} id dataIndex of data
   */
  toggleSelected: function (name, id) {
    var target = id != null ? this._targetList[id] : this._selectTargetMap.get(name);

    if (target != null) {
      this[target.selected ? 'unSelect' : 'select'](name, id);
      return target.selected;
    }
  },

  /**
   * Either name or id should be passed as input here.
   * If both of them are defined, id is used.
   *
   * @param {string|undefined} name name of data
   * @param {number|undefined} id dataIndex of data
   */
  isSelected: function (name, id) {
    var target = id != null ? this._targetList[id] : this._selectTargetMap.get(name);
    return target && target.selected;
  }
};
module.exports = _default;