<template>
  <div
    :class="{
      diffs: true,
      full: !showLogs,
      split: showLogs
    }"
  >
    <div v-for="(result, index) in details.summary" :key="index">
      <div class="px-2 d-flex justify-content-between">
        <div class="d-flex">
          <div @click="toggleDiff(index)" class="my-auto text-left">
            <UISpinnerButton
              :state="showDiff === index"
              :icons="['angle-right', 'angle-down']"
              classes="text-info"
            />
          </div>
          <div>
            {{ result["fk-gauge-id"] }}
            <sup v-if="isNew(result)" class="text-success">
              (<translate>New</translate>)
            </sup>
          </div>
        </div>
        <div>{{ result["measure-date"] | dateTime }}</div>
      </div>
      <div v-if="showDiff === index" class="compare-table">
        <div class="row no-gutters px-4 text-left font-weight-bold">
          <div :class="isNew(result) ? 'col-6' : 'col-4'">
            <translate>Value</translate>
          </div>
          <div v-if="isOld(result)" class="col-4">
            <translate>Old</translate>
          </div>
          <div :class="isNew(result) ? 'col-6' : 'col-4'">
            <translate>New</translate>
          </div>
        </div>
        <div
          class="row no-gutters px-4 text-left"
          v-for="(entry, index) in Object.keys(result.versions[0])"
          :key="index"
          v-if="isNew(result) || isDifferent(result, entry)"
        >
          <div :class="isNew(result) ? 'col-6' : 'col-4'">
            {{ entry }}
          </div>
          <div :class="isNew(result) ? 'col-6' : 'col-4'">
            {{ result.versions[0][entry] }}
          </div>
          <div
            v-if="isOld(result) && isDifferent(result, entry)"
            :class="isNew(result) ? 'col-6' : 'col-4'"
          >
            {{ result.versions[1][entry] }}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<style lang="sass" scoped>
.diffs
  width: 100%
  overflow-y: auto
  > div
    border-top: dashed 1px #dee2e6
    &:first-child
      border-top: none
    .compare-table
      position: relative
      overflow: hidden
      &::after
        content: ''
        position: absolute
        top: 0
        right: -5px
        bottom: 0
        left: -5px
        box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.4)
      > div
        font-size: 0.7rem
        &:nth-child(odd)
          background-color: #f8f9fa

.split
  max-height: 35vh

.full
  max-height: 70vh
</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 { mapState } from "vuex";

export default {
  data() {
    return {
      showDiff: 0 // open first item by default
    };
  },
  computed: {
    ...mapState("imports", ["showLogs", "details"])
  },
  methods: {
    toggleDiff(number) {
      if (this.showDiff !== number) {
        this.showDiff = number;
      } else {
        this.showDiff = false;
      }
    },
    isNew(result) {
      return result && result.versions && result.versions.length === 1;
    },
    isOld(result) {
      return !this.isNew(result);
    },
    isDifferent(result, entry) {
      return (
        this.isOld(result) &&
        result.versions[0][entry] != result.versions[1][entry]
      );
    }
  }
};
</script>