<template>
  <div class="gallery-page">
    <GalleryImageViewer class="image-viewer"
                        :is-visible="imageViewerIsVisible"
                        :image-url="viewingImageUrl"
                        :has-next="activeImageIndex < galleries[activeGalleryIndex].images.length - 1"
                        :has-prev="activeImageIndex > 0"
                        @clickPrev="handleClickPrev"
                        @clickNext="handleClickNext"
                        @close="imageViewerIsVisible = false" />
    <div class="gallery">
      <GalleryFeatured class="gallery__featured"
                       :featured-height="featuredImageHeight"
                       :galleries="galleries"
                       @clicked="handleFeaturedClick" />
      <GalleryThumbs class="gallery__thumbs"
                     :featured-height="featuredImageHeight"
                     :galleries="galleries"
                     :active-row="activeRow"
                     @thumbClick="handleThumbClick"/>
    </div>
  </div>
</template>

<script>
import GalleryFeatured from '@/components/GalleryFeatured'
import GalleryThumbs from '@/components/GalleryThumbs'
import GalleryImageViewer from '@/components/GalleryImageViewer'

export default {
  components: {
    GalleryFeatured,
    GalleryThumbs,
    GalleryImageViewer,
  },

  props: {
    galleries: {
      type: Array,
      required: true
    }
  },

  data () {
    return {
      featuredImageHeight: '16rem',
      imageViewerIsVisible: false,
      activeRow: 0,
      activeGalleryIndex: 0,
      activeImageIndex: 0
    }
  },

  computed: {
    viewingImageUrl () {
      return this.galleries[this.activeGalleryIndex].images[this.activeImageIndex].url
    }
  },

  mounted () {
    window.addEventListener('resize', () => { this.imageViewerIsVisible = false })
  },

  methods: {
    handleFeaturedClick (index) {
      this.activeRow = index
    },
    handleThumbClick(gallery, image) {
      this.activeGalleryIndex = gallery
      this.activeImageIndex = image
      this.imageViewerIsVisible = true
    },
    handleClickNext () {
      this.activeImageIndex++;
    },
    handleClickPrev () {
      this.activeImageIndex--;
    }
  }
}
</script>

<style lang="scss" scoped>
.gallery-page {
  position: relative;
  height: 100%;
  width: 100%;
}

.image-viewer {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

@media (max-width: $bp__layout) {
  .gallery-page {
    padding-top: $site-menu__header-height;
  }

  .gallery {
    position: relative;
    height: 100%;
    width: 100%;
    overflow-x: hidden;
    overflow-y: auto;
  }

    .gallery__thumbs {
      position: absolute;
      top: 0;
      left: 0;
    }

    .gallery__featured {
      width: 100vw;
    }

  .close-viewer {
    font-size: 10em;
    cursor: pointer;
  }
}

@media (min-width: $bp__layout) {
  .mobile-only {
    display: none;
  }

  .gallery-page {
    padding-left: $site-menu__header-width;
  }

  .gallery {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    position: relative;
    height: 100%;
    width: 100%;
    overflow: hidden;
  }

    .gallery__featured {
      order: 2;
      flex: 0 0 20rem;
      overflow-y: auto;
    }

    .gallery__thumbs {
      order: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding-left: 8px;
      overflow: hidden;
    }

    .gallery__nav {
      display: none;
    }

  .close-viewer {
    display: none;
  }

}

</style>
