<template>
  <div class="theme" :class="pageClasses">
    <NavBar v-if="showNavbar" @toggle="toggleSidebar">
      <template #search>
        <slot name="navbar-search">
          <AlgoliaSearchBox
            v-if="theme.algolia"
            :options="theme.algolia"
            :multilang="!!theme.locales"
            :key="siteRouteData.lang"
          />
        </slot>
      </template>
    </NavBar>

    <SideBar :open="openSideBar">
      <template #sidebar-top>
        <slot name="sidebar-top" />
      </template>
      <template #sidebar-bottom>
        <slot name="sidebar-bottom" />
      </template>
    </SideBar>
    <!-- TODO: make this button accessible -->
    <div class="sidebar-mask" @click="toggleSidebar(false)" />

    <Content v-if="isCustomLayout" />

    <Home v-else-if="enableHome">
      <template #hero>
        <slot name="home-hero" />
      </template>
      <template #features>
        <slot name="home-features" />
      </template>
      <template #footer>
        <slot name="home-footer" />
      </template>
    </Home>

    <Page v-else>
      <template #top>
        <slot name="page-top-ads">
          <div
            id="ads-container"
            v-if="theme.carbonAds && theme.carbonAds.carbon"
          >
            <CarbonAds
              :key="'carbon' + page.relativePath"
              :code="theme.carbonAds.carbon"
              :placement="theme.carbonAds.placement"
            />
          </div>
        </slot>
        <slot name="page-top" />
      </template>
      <template #bottom>
        <slot name="page-bottom" />
        <slot name="page-bottom-ads">
          <BuySellAds
            v-if="theme.carbonAds && theme.carbonAds.custom"
            :key="'custom' + page.relativePath"
            :code="theme.carbonAds.custom"
            :placement="theme.carbonAds.placement"
          />
        </slot>
      </template>
    </Page>
  </div>

  <Debug />
</template>

<script setup lang="ts">
import { ref, computed, watch, defineAsyncComponent } from 'vue'
import {
  useRoute,
  useSiteData,
  usePageData,
  useSiteDataByRoute
} from 'vitepress'
import { isSideBarEmpty, getSideBarConfig } from './support/sideBar'
import type { DefaultTheme } from './config'

// components
import NavBar from './components/NavBar.vue'
import SideBar from './components/SideBar.vue'
import Page from './components/Page.vue'

const Home = defineAsyncComponent(() => import('./components/Home.vue'))

const NoopComponent = () => null

const CarbonAds = __CARBON__
  ? defineAsyncComponent(() => import('./components/CarbonAds.vue'))
  : NoopComponent
const BuySellAds = __BSA__
  ? defineAsyncComponent(() => import('./components/BuySellAds.vue'))
  : NoopComponent
const AlgoliaSearchBox = __ALGOLIA__
  ? defineAsyncComponent(() => import('./components/AlgoliaSearchBox.vue'))
  : NoopComponent

// generic state
const route = useRoute()
const siteData = useSiteData<DefaultTheme.Config>()
const siteRouteData = useSiteDataByRoute()
const theme = computed(() => siteData.value.themeConfig)
const page = usePageData()

// custom layout
const isCustomLayout = computed(() => !!route.data.frontmatter.customLayout)
// home
const enableHome = computed(() => !!route.data.frontmatter.home)

// navbar
const showNavbar = computed(() => {
  const { themeConfig } = siteRouteData.value
  const { frontmatter } = route.data
  if (frontmatter.navbar === false || themeConfig.navbar === false) {
    return false
  }
  return (
    siteData.value.title ||
    themeConfig.logo ||
    themeConfig.repo ||
    themeConfig.nav
  )
})

// sidebar
const openSideBar = ref(false)

const showSidebar = computed(() => {
  const { frontmatter } = route.data

  if (frontmatter.home || frontmatter.sidebar === false) {
    return false
  }

  const { themeConfig } = siteRouteData.value

  return !isSideBarEmpty(
    getSideBarConfig(themeConfig.sidebar, route.data.relativePath)
  )
})

const toggleSidebar = (to?: boolean) => {
  openSideBar.value = typeof to === 'boolean' ? to : !openSideBar.value
}

const hideSidebar = toggleSidebar.bind(null, false)
// close the sidebar when navigating to a different location
watch(route, hideSidebar)
// TODO: route only changes when the pathname changes
// listening to hashchange does nothing because it's prevented in router

// page classes
const pageClasses = computed(() => {
  return [
    {
      'no-navbar': !showNavbar.value,
      'sidebar-open': openSideBar.value,
      'no-sidebar': !showSidebar.value
    }
  ]
})
</script>

<style>
#ads-container {
  margin: 0 auto;
}

@media (min-width: 420px) {
  #ads-container {
    position: relative;
    right: 0;
    float: right;
    margin: -8px -8px 24px 24px;
    width: 146px;
  }
}

@media (max-width: 420px) {
  #ads-container {
    /* Avoid layout shift */
    height: 105px;
    margin: 1.75rem 0;
  }
}

@media (min-width: 1400px) {
  #ads-container {
    position: fixed;
    right: 8px;
    bottom: 8px;
  }
}
</style>
