<template>
    <div>
        <div class="form-check d-flex flex-row flex-start selection">
            <input class="form-check-input" @change="visibilityToggled" :id="layername" type="checkbox" :checked="isVisible">
            <LegendElement :layername="layername" :layerindex="layerindex"></LegendElement>
            <label class="layername form-check-label">{{layername}}</label>
        </div>
        <div v-if="isVisible && (layername == 'Bottleneck isolines')" class="card">
            <img class="rounded mx-auto d-block" :src="isolinesLegendImgUrl">
        </div>
    </div>
</template>

<style lang="sass" scoped>
.selection
  text-align: left

.layername
  margin-left: $small-offset
</style>


<script>
/*
 * This is Free Software under GNU Affero General Public License v >= 3.0
 * without warranty, see README.md and license for details.
 * 
 * SPDX-License-Identifier: AGPL-3.0-or-later
 * License-Filename: LICENSES/AGPL-3.0.txt
 * 
 * Copyright (C) 2018 by via donau 
 *   – Österreichische Wasserstraßen-Gesellschaft mbH
 * Software engineering by Intevation GmbH
 * 
 * Author(s):
 * Thomas Junk <thomas.junk@intevation.de>
 */
import { HTTP } from "../application/lib/http";
import LegendElement from "./LegendElement.vue";
export default {
  props: ["layername", "layerindex", "isVisible"],
  name: "layerselect",
  data() {
    return {
      isolinesLegendImgUrl: ""
    };
  },
  components: {
    LegendElement
  },
  methods: {
    visibilityToggled() {
      this.$emit("visibilityToggled", this.layerindex);
    }
  },
  created() {
    // fetch legend image for bottleneck isolines
    // TODO: move to store
    if (this.layername == "Bottleneck isolines") {
      const src =
        "/internal/wms?REQUEST=GetLegendGraphic&VERSION=1.0.0&FORMAT=image/png&WIDTH=20&HEIGHT=20&LAYER=sounding_results_contour_lines_geoserver&legend_options=columns:4;fontAntiAliasing:true";
      HTTP.get(src, {
        headers: {
          Accept: "image/png",
          "X-Gemma-Auth": localStorage.getItem("token")
        },
        responseType: "blob"
      }).then(response => {
        var urlCreator = window.URL || window.webkitURL;
        this.isolinesLegendImgUrl = urlCreator.createObjectURL(response.data);
      });
    }
  }
};
</script>