var _config = require("../config");

var __DEV__ = _config.__DEV__;

var _util = require("@okfe/zrender/lib/core/util");

var createHashMap = _util.createHashMap;
var retrieve = _util.retrieve;
var each = _util.each;

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

/**
 * Helper for model references.
 * There are many manners to refer axis/coordSys.
 */
// TODO
// merge relevant logic to this file?
// check: "modelHelper" of tooltip and "BrushTargetManager".

/**
 * @return {Object} For example:
 * {
 *     coordSysName: 'cartesian2d',
 *     coordSysDims: ['x', 'y', ...],
 *     axisMap: HashMap({
 *         x: xAxisModel,
 *         y: yAxisModel
 *     }),
 *     categoryAxisMap: HashMap({
 *         x: xAxisModel,
 *         y: undefined
 *     }),
 *     // It also indicate that whether there is category axis.
 *     firstCategoryDimIndex: 1,
 *     // To replace user specified encode.
 * }
 */
function getCoordSysDefineBySeries(seriesModel) {
  var coordSysName = seriesModel.get('coordinateSystem');
  var result = {
    coordSysName: coordSysName,
    coordSysDims: [],
    axisMap: createHashMap(),
    categoryAxisMap: createHashMap()
  };
  var fetch = fetchers[coordSysName];

  if (fetch) {
    fetch(seriesModel, result, result.axisMap, result.categoryAxisMap);
    return result;
  }
}

var fetchers = {
  cartesian2d: function (seriesModel, result, axisMap, categoryAxisMap) {
    var xAxisModel = seriesModel.getReferringComponents('xAxis')[0];
    var yAxisModel = seriesModel.getReferringComponents('yAxis')[0];
    result.coordSysDims = ['x', 'y'];
    axisMap.set('x', xAxisModel);
    axisMap.set('y', yAxisModel);

    if (isCategory(xAxisModel)) {
      categoryAxisMap.set('x', xAxisModel);
      result.firstCategoryDimIndex = 0;
    }

    if (isCategory(yAxisModel)) {
      categoryAxisMap.set('y', yAxisModel);
      result.firstCategoryDimIndex = 1;
    }
  },
  singleAxis: function (seriesModel, result, axisMap, categoryAxisMap) {
    var singleAxisModel = seriesModel.getReferringComponents('singleAxis')[0];
    result.coordSysDims = ['single'];
    axisMap.set('single', singleAxisModel);

    if (isCategory(singleAxisModel)) {
      categoryAxisMap.set('single', singleAxisModel);
      result.firstCategoryDimIndex = 0;
    }
  },
  polar: function (seriesModel, result, axisMap, categoryAxisMap) {
    var polarModel = seriesModel.getReferringComponents('polar')[0];
    var radiusAxisModel = polarModel.findAxisModel('radiusAxis');
    var angleAxisModel = polarModel.findAxisModel('angleAxis');
    result.coordSysDims = ['radius', 'angle'];
    axisMap.set('radius', radiusAxisModel);
    axisMap.set('angle', angleAxisModel);

    if (isCategory(radiusAxisModel)) {
      categoryAxisMap.set('radius', radiusAxisModel);
      result.firstCategoryDimIndex = 0;
    }

    if (isCategory(angleAxisModel)) {
      categoryAxisMap.set('angle', angleAxisModel);
      result.firstCategoryDimIndex = 1;
    }
  },
  geo: function (seriesModel, result, axisMap, categoryAxisMap) {
    result.coordSysDims = ['lng', 'lat'];
  },
  parallel: function (seriesModel, result, axisMap, categoryAxisMap) {
    var ecModel = seriesModel.ecModel;
    var parallelModel = ecModel.getComponent('parallel', seriesModel.get('parallelIndex'));
    var coordSysDims = result.coordSysDims = parallelModel.dimensions.slice();
    each(parallelModel.parallelAxisIndex, function (axisIndex, index) {
      var axisModel = ecModel.getComponent('parallelAxis', axisIndex);
      var axisDim = coordSysDims[index];
      axisMap.set(axisDim, axisModel);

      if (isCategory(axisModel) && result.firstCategoryDimIndex == null) {
        categoryAxisMap.set(axisDim, axisModel);
        result.firstCategoryDimIndex = index;
      }
    });
  }
};

function isCategory(axisModel) {
  return axisModel.get('type') === 'category';
}

exports.getCoordSysDefineBySeries = getCoordSysDefineBySeries;