<template>
  <div id="panes" :class="'d-flex position-absolute rotate' + paneRotate">
    <Pane :pane="panes[0]" :class="pane1Classes" />

    <template v-if="panes.length === 2">
      <Pane :pane="panes[1]" :class="pane2Classes" />
    </template>

    <template v-if="panes.length === 3">
      <Pane :pane="panes[2]" class="d-flex wh-50" />
      <Pane :pane="panes[1]" class="d-flex wh-50" />
    </template>

    <template v-if="panes.length === 4">
      <Pane :pane="panes[1]" class="d-flex wh-50" />
      <Pane :pane="panes[3]" class="d-flex wh-50" />
      <Pane :pane="panes[2]" class="d-flex wh-50" />
    </template>
  </div>
</template>

<style lang="sass">
#panes
  top: -0.5px
  right: -0.5px
  bottom: -0.5px
  left: -0.5px
  z-index: 1
  &.rotate1
    flex-wrap: wrap
    flex-direction: row
  &.rotate2
    flex-wrap: wrap-reverse
    flex-direction: column
  &.rotate3
    flex-wrap: wrap-reverse
    flex-direction: row-reverse
  &.rotate4
    flex-wrap: wrap
    flex-direction: column-reverse
  .pane
    border: solid 0.5px #fff
    background: #fff
</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>
 * Markus Kottländer <markus.kottlaender@intevation.de>
 */

import { mapState } from "vuex";

export default {
  components: {
    Pane: () => import("./Pane")
  },
  computed: {
    ...mapState("application", ["panes", "paneRotate"]),
    // pane 1 and 2 are the only ones that can have varying size
    // thats why tehre is no pane3class or pane4class
    pane1Classes() {
      if (this.panes.length === 1) return "wh-100";
      if (this.panes.length === 2 || this.panes.length === 3) {
        if (this.paneRotate === 1 || this.paneRotate === 3) return "w-100 h-50";
        if (this.paneRotate === 2 || this.paneRotate === 4) return "w-50 h-100";
      }
      if (this.panes.length === 4) {
        return "wh-50";
      }
    },
    pane2Classes() {
      if (this.panes.length === 2) {
        if (this.paneRotate === 1 || this.paneRotate === 3) return "w-100 h-50";
        if (this.paneRotate === 2 || this.paneRotate === 4) return "w-50 h-100";
      } else {
        return "wh-50";
      }
    }
  }
};
</script>