<script setup lang="ts">
import { useData } from 'vitepress'
import DefaultTheme from 'vitepress/theme'
import Announcement from './components/Announcement.vue'
import Sidebar from './components/SidebarCard.vue'
import { useTheme } from './themes/themeHandler'

const { isDark } = useData()
const { setMode } = useTheme()

const enableTransitions = () =>
  'startViewTransition' in document &&
  window.matchMedia('(prefers-reduced-motion: no-preference)').matches

provide('toggle-appearance', async ({ clientX: x, clientY: y }: MouseEvent) => {
  if (!enableTransitions()) {
    isDark.value = !isDark.value
    // Sync with theme handler
    setMode(isDark.value ? 'dark' : 'light')
    return
  }

  const clipPath = [
    `circle(0px at ${x}px ${y}px)`,
    `circle(${Math.hypot(
      Math.max(x, innerWidth - x),
      Math.max(y, innerHeight - y)
    )}px at ${x}px ${y}px)`
  ]

  // @ts-expect-error
  await document.startViewTransition(async () => {
    isDark.value = !isDark.value
    // Sync with theme handler
    setMode(isDark.value ? 'dark' : 'light')
    await nextTick()
  }).ready

  document.documentElement.animate(
    { clipPath: isDark.value ? clipPath.reverse() : clipPath },
    {
      duration: 300,
      easing: 'ease-in',
      pseudoElement: `::view-transition-${isDark.value ? 'old' : 'new'}(root)`
    }
  )
})

const { Layout } = DefaultTheme
</script>

<template>
  <Layout>
    <template #sidebar-nav-after>
      <Sidebar />
    </template>
    <template #home-hero-info-before>
      <Announcement />
    </template>
    <template #home-features-before>
      <p class="text-center text-lg text-text-2 mb-2">
        Or browse these pages
        <span class="inline-block i-twemoji:sparkles" />
      </p>
    </template>
    <Content />
  </Layout>
</template>

<style>
::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
}

::view-transition-old(root),
.dark::view-transition-new(root) {
  z-index: 1;
}

::view-transition-new(root),
.dark::view-transition-old(root) {
  z-index: 9999;
}

.VPSwitchAppearance {
  width: 22px !important;
}

.VPSwitchAppearance .check {
  transform: none !important;
}
</style>
