'use strict';

var util = require('../../../../../../zrender@6.0.0/node_modules/zrender/lib/core/util.js');

function legendSelectActionHandler(methodName, payload, ecModel) {
  var isAllSelect = methodName === 'allSelect' || methodName === 'inverseSelect';
  var selectedMap = {};
  var actionLegendIndices = [];
  ecModel.eachComponent({
    mainType: 'legend',
    query: payload
  }, function (legendModel) {
    if (isAllSelect) {
      legendModel[methodName]();
    } else {
      legendModel[methodName](payload.name);
    }
    makeSelectedMap(legendModel, selectedMap);
    actionLegendIndices.push(legendModel.componentIndex);
  });
  var allSelectedMap = {};
  // make selectedMap from all legend components
  ecModel.eachComponent('legend', function (legendModel) {
    util.each(selectedMap, function (isSelected, name) {
      // Force other legend has same selected status
      // Or the first is toggled to true and other are toggled to false
      // In the case one legend has some item unSelected in option. And if other legend
      // doesn't has the item, they will assume it is selected.
      legendModel[isSelected ? 'select' : 'unSelect'](name);
    });
    makeSelectedMap(legendModel, allSelectedMap);
  });
  // Return the event explicitly
  return isAllSelect ? {
    selected: allSelectedMap,
    // return legendIndex array to tell the developers which legends are allSelect / inverseSelect
    legendIndex: actionLegendIndices
  } : {
    name: payload.name,
    selected: allSelectedMap
  };
}
function makeSelectedMap(legendModel, out) {
  var selectedMap = out || {};
  util.each(legendModel.getData(), function (model) {
    var name = model.get('name');
    // Wrap element
    if (name === '\n' || name === '') {
      return;
    }
    var isItemSelected = legendModel.isSelected(name);
    if (util.hasOwn(selectedMap, name)) {
      // Unselected if any legend is unselected
      selectedMap[name] = selectedMap[name] && isItemSelected;
    } else {
      selectedMap[name] = isItemSelected;
    }
  });
  return selectedMap;
}
function installLegendAction(registers) {
  /**
   * @event legendToggleSelect
   * @type {Object}
   * @property {string} type 'legendToggleSelect'
   * @property {string} [from]
   * @property {string} name Series name or data item name
   */
  registers.registerAction('legendToggleSelect', 'legendselectchanged', util.curry(legendSelectActionHandler, 'toggleSelected'));
  registers.registerAction('legendAllSelect', 'legendselectall', util.curry(legendSelectActionHandler, 'allSelect'));
  registers.registerAction('legendInverseSelect', 'legendinverseselect', util.curry(legendSelectActionHandler, 'inverseSelect'));
  /**
   * @event legendSelect
   * @type {Object}
   * @property {string} type 'legendSelect'
   * @property {string} name Series name or data item name
   */
  registers.registerAction('legendSelect', 'legendselected', util.curry(legendSelectActionHandler, 'select'));
  /**
   * @event legendUnSelect
   * @type {Object}
   * @property {string} type 'legendUnSelect'
   * @property {string} name Series name or data item name
   */
  registers.registerAction('legendUnSelect', 'legendunselected', util.curry(legendSelectActionHandler, 'unSelect'));
}

exports.installLegendAction = installLegendAction;
