<!--
  This example requires Tailwind CSS v2.0+ 
  
  This example requires some changes to your config:
  
  ```
  // tailwind.config.js
  module.exports = {
    // ...
    plugins: [
      // ...
      require('@tailwindcss/forms'),
    ],
  }
  ```
-->
<template>
  <div class="bg-white">
    <!-- Mobile menu -->
    <TransitionRoot as="template" :show="open">
      <Dialog as="div" class="relative z-40 lg:hidden" @close="open = false">
        <TransitionChild as="template" enter="transition-opacity ease-linear duration-300" enter-from="opacity-0" enter-to="opacity-100" leave="transition-opacity ease-linear duration-300" leave-from="opacity-100" leave-to="opacity-0">
          <div class="fixed inset-0 bg-black bg-opacity-25" />
        </TransitionChild>

        <div class="fixed inset-0 z-40 flex">
          <TransitionChild as="template" enter="transition ease-in-out duration-300 transform" enter-from="-translate-x-full" enter-to="translate-x-0" leave="transition ease-in-out duration-300 transform" leave-from="translate-x-0" leave-to="-translate-x-full">
            <DialogPanel class="relative flex w-full max-w-xs flex-col overflow-y-auto bg-white pb-12 shadow-xl">
              <div class="flex px-4 pt-5 pb-2">
                <button type="button" class="-m-2 inline-flex items-center justify-center rounded-md p-2 text-gray-400" @click="open = false">
                  <span class="sr-only">Close menu</span>
                  <XMarkIcon class="h-6 w-6" aria-hidden="true" />
                </button>
              </div>

              <!-- Links -->
              <TabGroup as="div" class="mt-2">
                <div class="border-b border-gray-200">
                  <TabList class="-mb-px flex space-x-8 px-4">
                    <Tab as="template" v-for="category in navigation.categories" :key="category.name" v-slot="{ selected }">
                      <button :class="[selected ? 'text-indigo-600 border-indigo-600' : 'text-gray-900 border-transparent', 'flex-1 whitespace-nowrap border-b-2 py-4 px-1 text-base font-medium']">{{ category.name }}</button>
                    </Tab>
                  </TabList>
                </div>
                <TabPanels as="template">
                  <TabPanel v-for="(category, categoryIdx) in navigation.categories" :key="category.name" class="space-y-12 px-4 pt-10 pb-6">
                    <div class="grid grid-cols-1 items-start gap-y-10 gap-x-6">
                      <div class="grid grid-cols-1 gap-y-10 gap-x-6">
                        <div>
                          <p :id="`mobile-featured-heading-${categoryIdx}`" class="font-medium text-gray-900">Featured</p>
                          <ul role="list" :aria-labelledby="`mobile-featured-heading-${categoryIdx}`" class="mt-6 space-y-6">
                            <li v-for="item in category.featured" :key="item.name" class="flex">
                              <a :href="item.href" class="text-gray-500">{{ item.name }}</a>
                            </li>
                          </ul>
                        </div>
                        <div>
                          <p id="mobile-categories-heading" class="font-medium text-gray-900">Categories</p>
                          <ul role="list" aria-labelledby="mobile-categories-heading" class="mt-6 space-y-6">
                            <li v-for="item in category.categories" :key="item.name" class="flex">
                              <a :href="item.href" class="text-gray-500">{{ item.name }}</a>
                            </li>
                          </ul>
                        </div>
                      </div>
                      <div class="grid grid-cols-1 gap-y-10 gap-x-6">
                        <div>
                          <p id="mobile-collection-heading" class="font-medium text-gray-900">Collection</p>
                          <ul role="list" aria-labelledby="mobile-collection-heading" class="mt-6 space-y-6">
                            <li v-for="item in category.collection" :key="item.name" class="flex">
                              <a :href="item.href" class="text-gray-500">{{ item.name }}</a>
                            </li>
                          </ul>
                        </div>

                        <div>
                          <p id="mobile-brand-heading" class="font-medium text-gray-900">Brands</p>
                          <ul role="list" aria-labelledby="mobile-brand-heading" class="mt-6 space-y-6">
                            <li v-for="item in category.brands" :key="item.name" class="flex">
                              <a :href="item.href" class="text-gray-500">{{ item.name }}</a>
                            </li>
                          </ul>
                        </div>
                      </div>
                    </div>
                  </TabPanel>
                </TabPanels>
              </TabGroup>

              <div class="space-y-6 border-t border-gray-200 py-6 px-4">
                <div v-for="page in navigation.pages" :key="page.name" class="flow-root">
                  <a :href="page.href" class="-m-2 block p-2 font-medium text-gray-900">{{ page.name }}</a>
                </div>
              </div>

              <div class="space-y-6 border-t border-gray-200 py-6 px-4">
                <div class="flow-root">
                  <a href="#" class="-m-2 block p-2 font-medium text-gray-900">Create an account</a>
                </div>
                <div class="flow-root">
                  <a href="#" class="-m-2 block p-2 font-medium text-gray-900">Sign in</a>
                </div>
              </div>

              <div class="space-y-6 border-t border-gray-200 py-6 px-4">
                <!-- Currency selector -->
                <form>
                  <div class="inline-block">
                    <label for="mobile-currency" class="sr-only">Currency</label>
                    <div class="group relative -ml-2 rounded-md border-transparent focus-within:ring-2 focus-within:ring-white">
                      <select id="mobile-currency" name="currency" class="flex items-center rounded-md border-transparent bg-none py-0.5 pl-2 pr-5 text-sm font-medium text-gray-700 focus:border-transparent focus:outline-none focus:ring-0 group-hover:text-gray-800">
                        <option v-for="currency in currencies" :key="currency">{{ currency }}</option>
                      </select>
                      <div class="pointer-events-none absolute inset-y-0 right-0 flex items-center">
                        <ChevronDownIcon class="h-5 w-5 text-gray-500" aria-hidden="true" />
                      </div>
                    </div>
                  </div>
                </form>
              </div>
            </DialogPanel>
          </TransitionChild>
        </div>
      </Dialog>
    </TransitionRoot>

    <header class="relative">
      <nav aria-label="Top">
        <!-- Top navigation -->
        <div class="bg-gray-900">
          <div class="mx-auto flex h-10 max-w-7xl items-center justify-between px-4 sm:px-6 lg:px-8">
            <!-- Currency selector -->
            <form class="hidden lg:block lg:flex-1">
              <div class="flex">
                <label for="desktop-currency" class="sr-only">Currency</label>
                <div class="group relative -ml-2 rounded-md border-transparent bg-gray-900 focus-within:ring-2 focus-within:ring-white">
                  <select id="desktop-currency" name="currency" class="flex items-center rounded-md border-transparent bg-gray-900 bg-none py-0.5 pl-2 pr-5 text-sm font-medium text-white focus:border-transparent focus:outline-none focus:ring-0 group-hover:text-gray-100">
                    <option v-for="currency in currencies" :key="currency">{{ currency }}</option>
                  </select>
                  <div class="pointer-events-none absolute inset-y-0 right-0 flex items-center">
                    <ChevronDownIcon class="h-5 w-5 text-gray-300" aria-hidden="true" />
                  </div>
                </div>
              </div>
            </form>

            <p class="flex-1 text-center text-sm font-medium text-white lg:flex-none">Get free delivery on orders over $100</p>

            <div class="hidden lg:flex lg:flex-1 lg:items-center lg:justify-end lg:space-x-6">
              <a href="#" class="text-sm font-medium text-white hover:text-gray-100">Create an account</a>
              <span class="h-6 w-px bg-gray-600" aria-hidden="true" />
              <a href="#" class="text-sm font-medium text-white hover:text-gray-100">Sign in</a>
            </div>
          </div>
        </div>

        <!-- Secondary navigation -->
        <div class="bg-white">
          <div class="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
            <div class="border-b border-gray-200">
              <div class="flex h-16 items-center justify-between">
                <!-- Logo (lg+) -->
                <div class="hidden lg:flex lg:items-center">
                  <a href="#">
                    <span class="sr-only">Your Company</span>
                    <img class="h-8 w-auto" src="https://tailwindui.com/img/logos/mark.svg?color=indigo&shade=600" alt="" />
                  </a>
                </div>

                <div class="hidden h-full lg:flex">
                  <!-- Mega menus -->
                  <PopoverGroup class="ml-8">
                    <div class="flex h-full justify-center space-x-8">
                      <Popover v-for="(category, categoryIdx) in navigation.categories" :key="category.name" class="flex" v-slot="{ open }">
                        <div class="relative flex">
                          <PopoverButton :class="[open ? 'border-indigo-600 text-indigo-600' : 'border-transparent text-gray-700 hover:text-gray-800', 'relative z-10 -mb-px flex items-center border-b-2 pt-px text-sm font-medium transition-colors duration-200 ease-out']">{{ category.name }}</PopoverButton>
                        </div>

                        <transition enter-active-class="transition ease-out duration-200" enter-from-class="opacity-0" enter-to-class="opacity-100" leave-active-class="transition ease-in duration-150" leave-from-class="opacity-100" leave-to-class="opacity-0">
                          <PopoverPanel class="absolute inset-x-0 top-full text-gray-500 sm:text-sm">
                            <!-- Presentational element used to render the bottom shadow, if we put the shadow on the actual panel it pokes out the top, so we use this shorter element to hide the top of the shadow -->
                            <div class="absolute inset-0 top-1/2 bg-white shadow" aria-hidden="true" />

                            <div class="relative bg-white">
                              <div class="mx-auto max-w-7xl px-8">
                                <div class="grid grid-cols-2 items-start gap-y-10 gap-x-8 pt-10 pb-12">
                                  <div class="grid grid-cols-2 gap-y-10 gap-x-8">
                                    <div>
                                      <p :id="`desktop-featured-heading-${categoryIdx}`" class="font-medium text-gray-900">Featured</p>
                                      <ul role="list" :aria-labelledby="`desktop-featured-heading-${categoryIdx}`" class="mt-6 space-y-6 sm:mt-4 sm:space-y-4">
                                        <li v-for="item in category.featured" :key="item.name" class="flex">
                                          <a :href="item.href" class="hover:text-gray-800">{{ item.name }}</a>
                                        </li>
                                      </ul>
                                    </div>
                                    <div>
                                      <p id="desktop-categories-heading" class="font-medium text-gray-900">Categories</p>
                                      <ul role="list" aria-labelledby="desktop-categories-heading" class="mt-6 space-y-6 sm:mt-4 sm:space-y-4">
                                        <li v-for="item in category.categories" :key="item.name" class="flex">
                                          <a :href="item.href" class="hover:text-gray-800">{{ item.name }}</a>
                                        </li>
                                      </ul>
                                    </div>
                                  </div>
                                  <div class="grid grid-cols-2 gap-y-10 gap-x-8">
                                    <div>
                                      <p id="desktop-collection-heading" class="font-medium text-gray-900">Collection</p>
                                      <ul role="list" aria-labelledby="desktop-collection-heading" class="mt-6 space-y-6 sm:mt-4 sm:space-y-4">
                                        <li v-for="item in category.collection" :key="item.name" class="flex">
                                          <a :href="item.href" class="hover:text-gray-800">{{ item.name }}</a>
                                        </li>
                                      </ul>
                                    </div>

                                    <div>
                                      <p id="desktop-brand-heading" class="font-medium text-gray-900">Brands</p>
                                      <ul role="list" aria-labelledby="desktop-brand-heading" class="mt-6 space-y-6 sm:mt-4 sm:space-y-4">
                                        <li v-for="item in category.brands" :key="item.name" class="flex">
                                          <a :href="item.href" class="hover:text-gray-800">{{ item.name }}</a>
                                        </li>
                                      </ul>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </PopoverPanel>
                        </transition>
                      </Popover>

                      <a v-for="page in navigation.pages" :key="page.name" :href="page.href" class="flex items-center text-sm font-medium text-gray-700 hover:text-gray-800">{{ page.name }}</a>
                    </div>
                  </PopoverGroup>
                </div>

                <!-- Mobile menu and search (lg-) -->
                <div class="flex flex-1 items-center lg:hidden">
                  <button type="button" class="-ml-2 rounded-md bg-white p-2 text-gray-400" @click="open = true">
                    <span class="sr-only">Open menu</span>
                    <Bars3Icon class="h-6 w-6" aria-hidden="true" />
                  </button>

                  <!-- Search -->
                  <a href="#" class="ml-2 p-2 text-gray-400 hover:text-gray-500">
                    <span class="sr-only">Search</span>
                    <MagnifyingGlassIcon class="h-6 w-6" aria-hidden="true" />
                  </a>
                </div>

                <!-- Logo (lg-) -->
                <a href="#" class="lg:hidden">
                  <span class="sr-only">Your Company</span>
                  <img src="https://tailwindui.com/img/logos/mark.svg?color=indigo&shade=600" alt="" class="h-8 w-auto" />
                </a>

                <div class="flex flex-1 items-center justify-end">
                  <div class="flex items-center lg:ml-8">
                    <div class="flex space-x-8">
                      <div class="hidden lg:flex">
                        <a href="#" class="-m-2 p-2 text-gray-400 hover:text-gray-500">
                          <span class="sr-only">Search</span>
                          <MagnifyingGlassIcon class="h-6 w-6" aria-hidden="true" />
                        </a>
                      </div>

                      <div class="flex">
                        <a href="#" class="-m-2 p-2 text-gray-400 hover:text-gray-500">
                          <span class="sr-only">Account</span>
                          <UserIcon class="h-6 w-6" aria-hidden="true" />
                        </a>
                      </div>
                    </div>

                    <span class="mx-4 h-6 w-px bg-gray-200 lg:mx-6" aria-hidden="true" />

                    <div class="flow-root">
                      <a href="#" class="group -m-2 flex items-center p-2">
                        <ShoppingCartIcon class="h-6 w-6 flex-shrink-0 text-gray-400 group-hover:text-gray-500" aria-hidden="true" />
                        <span class="ml-2 text-sm font-medium text-gray-700 group-hover:text-gray-800">0</span>
                        <span class="sr-only">items in cart, view bag</span>
                      </a>
                    </div>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </nav>
    </header>
  </div>
</template>

<script setup>
import { ref } from 'vue'
import {
  Dialog,
  DialogPanel,
  Popover,
  PopoverButton,
  PopoverGroup,
  PopoverPanel,
  Tab,
  TabGroup,
  TabList,
  TabPanel,
  TabPanels,
  TransitionChild,
  TransitionRoot,
} from '@headlessui/vue'
import { Bars3Icon, MagnifyingGlassIcon, ShoppingCartIcon, UserIcon, XMarkIcon } from '@heroicons/vue/24/outline'
import { ChevronDownIcon } from '@heroicons/vue/20/solid'

const currencies = ['CAD', 'USD', 'AUD', 'EUR', 'GBP']
const navigation = {
  categories: [
    {
      name: 'Women',
      featured: [
        { name: 'Sleep', href: '#' },
        { name: 'Swimwear', href: '#' },
        { name: 'Underwear', href: '#' },
      ],
      collection: [
        { name: 'Everything', href: '#' },
        { name: 'Core', href: '#' },
        { name: 'New Arrivals', href: '#' },
        { name: 'Sale', href: '#' },
      ],
      categories: [
        { name: 'Basic Tees', href: '#' },
        { name: 'Artwork Tees', href: '#' },
        { name: 'Bottoms', href: '#' },
        { name: 'Underwear', href: '#' },
        { name: 'Accessories', href: '#' },
      ],
      brands: [
        { name: 'Full Nelson', href: '#' },
        { name: 'My Way', href: '#' },
        { name: 'Re-Arranged', href: '#' },
        { name: 'Counterfeit', href: '#' },
        { name: 'Significant Other', href: '#' },
      ],
    },
    {
      name: 'Men',
      featured: [
        { name: 'Casual', href: '#' },
        { name: 'Boxers', href: '#' },
        { name: 'Outdoor', href: '#' },
      ],
      collection: [
        { name: 'Everything', href: '#' },
        { name: 'Core', href: '#' },
        { name: 'New Arrivals', href: '#' },
        { name: 'Sale', href: '#' },
      ],
      categories: [
        { name: 'Artwork Tees', href: '#' },
        { name: 'Pants', href: '#' },
        { name: 'Accessories', href: '#' },
        { name: 'Boxers', href: '#' },
        { name: 'Basic Tees', href: '#' },
      ],
      brands: [
        { name: 'Significant Other', href: '#' },
        { name: 'My Way', href: '#' },
        { name: 'Counterfeit', href: '#' },
        { name: 'Re-Arranged', href: '#' },
        { name: 'Full Nelson', href: '#' },
      ],
    },
  ],
  pages: [
    { name: 'Company', href: '#' },
    { name: 'Stores', href: '#' },
  ],
}

const open = ref(false)
</script>