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/*
* 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.
*/


function normalize(a) {
    if (!(a instanceof Array)) {
        a = [a, a];
    }
    return a;
}

var opacityQuery = 'lineStyle.opacity'.split('.');

export default {
    seriesType: 'lines',
    reset: function (seriesModel, ecModel, api) {
        var symbolType = normalize(seriesModel.get('symbol'));
        var symbolSize = normalize(seriesModel.get('symbolSize'));
        var data = seriesModel.getData();

        data.setVisual('fromSymbol', symbolType && symbolType[0]);
        data.setVisual('toSymbol', symbolType && symbolType[1]);
        data.setVisual('fromSymbolSize', symbolSize && symbolSize[0]);
        data.setVisual('toSymbolSize', symbolSize && symbolSize[1]);
        data.setVisual('opacity', seriesModel.get(opacityQuery));

        function dataEach(data, idx) {
            var itemModel = data.getItemModel(idx);
            var symbolType = normalize(itemModel.getShallow('symbol', true));
            var symbolSize = normalize(itemModel.getShallow('symbolSize', true));
            var opacity = itemModel.get(opacityQuery);

            symbolType[0] && data.setItemVisual(idx, 'fromSymbol', symbolType[0]);
            symbolType[1] && data.setItemVisual(idx, 'toSymbol', symbolType[1]);
            symbolSize[0] && data.setItemVisual(idx, 'fromSymbolSize', symbolSize[0]);
            symbolSize[1] && data.setItemVisual(idx, 'toSymbolSize', symbolSize[1]);

            data.setItemVisual(idx, 'opacity', opacity);
        }

        return {dataEach: data.hasItemOption ? dataEach : null};
    }
};