/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2016-2017 Dan "Ducky" Little
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
import React from "react";
import { connect } from "react-redux";

import { setOpacity } from "../../../actions/mapSource";

import { Tool } from "../tools";

/** Tool to "fade" a layer. Aka, take away opacity.
 */
export const FadeTool = ({ tip, iconClass, layer, mapSources, direction, onFade }) => {
  return (
    <Tool
      tip={tip}
      iconClass={iconClass}
      onClick={() => {
        // collect the map sources
        const fadeMapSources = {};
        for (let i = 0, ii = layer.src.length; i < ii; i++) {
          const mapSourceName = layer.src[i].mapSourceName;
          fadeMapSources[mapSourceName] = mapSources[mapSourceName].opacity;
        }

        for (const mapSourceName in fadeMapSources) {
          let newOpacity = (fadeMapSources[mapSourceName] += direction);

          // check the bounds
          if (newOpacity < 0) {
            newOpacity = 0;
          } else if (newOpacity > 1) {
            newOpacity = 1;
          }

          onFade(mapSourceName, newOpacity);
        }
      }}
    />
  );
};

FadeTool.defaultProps = {
  tip: "fade-tip",
  iconClass: "fade",
  direction: -0.1,
};

function mapState(state) {
  return {
    mapSources: state.mapSources,
  };
}

function mapDispatch(dispatch) {
  return {
    onFade: (mapSourceName, opacity) => {
      dispatch(setOpacity(mapSourceName, opacity));
    },
  };
}

export default connect(mapState, mapDispatch)(FadeTool);
