<template>
  <nav class="module-sub-navigation sub-navigation">
    <back-link
      :title="module.title"
      data-cy="back-link"
      type="module"
    />
  </nav>
</template>

<script setup lang="ts">
import BackLink from '@/components/BackLink.vue';
import { useQuery } from '@vue/apollo-composable';
import { useRoute } from 'vue-router';
import { computed } from 'vue';
import { graphql } from '@/__generated__';

const route = useRoute();
const { result } = useQuery(
  graphql(`
    query ModuleTitleQuery($slug: String) {
      module(slug: $slug) {
        title
      }
    }
  `),
  {
    slug: route.params.slug as string,
  }
);

const module = computed(() => result.value?.module || { title: '' });
</script>

<style scoped lang="scss">
@import 'styles/helpers';

@mixin module-navigation-typography {
  font-family: $sans-serif-font-family;
  color: $color-silver-dark;
  font-weight: $font-weight-regular;
}

.module-sub-navigation {
  display: none;
  width: 100%;
  box-sizing: border-box;
  z-index: 11;
  background-color: $color-white;
  border-top: 1px solid $color-silver;

  &__topic-link {
    @include regular-text;
  }

  @include desktop {
    display: flex;
  }

  &__module-content {
    margin-bottom: 18px;
  }

  &__heading {
    @include module-navigation-typography;
    margin: 0;
    font-size: 1.0625rem;
    cursor: pointer;
  }

  &__anchors {
    display: flex;
    flex-direction: column;
    padding: 16px 24px 0;
  }

  &__anchor {
    @include module-navigation-typography;
    font-size: 0.875rem;
    line-height: 1.2rem;
    margin-bottom: 0.6875rem;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;

    &--active {
      color: $color-brand;
    }
  }

  &__toggle-menu {
    margin-left: auto;
    display: flex;
    align-items: center;
  }

  &__actions {
    @include regular-text;
    margin-right: $medium-spacing;
  }
}
</style>
