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

var graphic = require("../util/graphic");

/*
* 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.
*/
var PI = Math.PI;
/**
 * @param {module:echarts/ExtensionAPI} api
 * @param {Object} [opts]
 * @param {string} [opts.text]
 * @param {string} [opts.color]
 * @param {string} [opts.textColor]
 * @return {module:zrender/Element}
 */

function _default(api, opts) {
  opts = opts || {};
  zrUtil.defaults(opts, {
    text: 'loading',
    color: '#c23531',
    textColor: '#000',
    maskColor: 'rgba(255, 255, 255, 0.8)',
    zlevel: 0
  });
  var mask = new graphic.Rect({
    style: {
      fill: opts.maskColor
    },
    zlevel: opts.zlevel,
    z: 10000
  });
  var arc = new graphic.Arc({
    shape: {
      startAngle: -PI / 2,
      endAngle: -PI / 2 + 0.1,
      r: 10
    },
    style: {
      stroke: opts.color,
      lineCap: 'round',
      lineWidth: 5
    },
    zlevel: opts.zlevel,
    z: 10001
  });
  var labelRect = new graphic.Rect({
    style: {
      fill: 'none',
      text: opts.text,
      textPosition: 'right',
      textDistance: 10,
      textFill: opts.textColor
    },
    zlevel: opts.zlevel,
    z: 10001
  });
  arc.animateShape(true).when(1000, {
    endAngle: PI * 3 / 2
  }).start('circularInOut');
  arc.animateShape(true).when(1000, {
    startAngle: PI * 3 / 2
  }).delay(300).start('circularInOut');
  var group = new graphic.Group();
  group.add(arc);
  group.add(labelRect);
  group.add(mask); // Inject resize

  group.resize = function () {
    var cx = api.getWidth() / 2;
    var cy = api.getHeight() / 2;
    arc.setShape({
      cx: cx,
      cy: cy
    });
    var r = arc.shape.r;
    labelRect.setShape({
      x: cx - r,
      y: cy - r,
      width: r * 2,
      height: r * 2
    });
    mask.setShape({
      x: 0,
      y: 0,
      width: api.getWidth(),
      height: api.getHeight()
    });
  };

  group.resize();
  return group;
}

module.exports = _default;