<!--
  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>
  <form action="#" class="relative">
    <div class="overflow-hidden rounded-lg border border-gray-300 shadow-sm focus-within:border-indigo-500 focus-within:ring-1 focus-within:ring-indigo-500">
      <label for="title" class="sr-only">Title</label>
      <input type="text" name="title" id="title" class="block w-full border-0 pt-2.5 text-lg font-medium placeholder-gray-500 focus:ring-0" placeholder="Title" />
      <label for="description" class="sr-only">Description</label>
      <textarea rows="2" name="description" id="description" class="block w-full resize-none border-0 py-0 placeholder-gray-500 focus:ring-0 sm:text-sm" placeholder="Write a description..." />

      <!-- Spacer element to match the height of the toolbar -->
      <div aria-hidden="true">
        <div class="py-2">
          <div class="h-9" />
        </div>
        <div class="h-px" />
        <div class="py-2">
          <div class="py-px">
            <div class="h-9" />
          </div>
        </div>
      </div>
    </div>

    <div class="absolute inset-x-px bottom-0">
      <!-- Actions: These are just examples to demonstrate the concept, replace/wire these up however makes sense for your project. -->
      <div class="flex flex-nowrap justify-end space-x-2 py-2 px-2 sm:px-3">
        <Listbox as="div" v-model="assigned" class="flex-shrink-0">
          <ListboxLabel class="sr-only"> Assign </ListboxLabel>
          <div class="relative">
            <ListboxButton class="relative inline-flex items-center whitespace-nowrap rounded-full bg-gray-50 py-2 px-2 text-sm font-medium text-gray-500 hover:bg-gray-100 sm:px-3">
              <UserCircleIcon v-if="assigned.value === null" class="h-5 w-5 flex-shrink-0 text-gray-300 sm:-ml-1" aria-hidden="true" />

              <img v-else :src="assigned.avatar" alt="" class="h-5 w-5 flex-shrink-0 rounded-full" />

              <span :class="[assigned.value === null ? '' : 'text-gray-900', 'hidden truncate sm:ml-2 sm:block']">{{ assigned.value === null ? 'Assign' : assigned.name }}</span>
            </ListboxButton>

            <transition leave-active-class="transition ease-in duration-100" leave-from-class="opacity-100" leave-to-class="opacity-0">
              <ListboxOptions class="absolute right-0 z-10 mt-1 max-h-56 w-52 overflow-auto rounded-lg bg-white py-3 text-base shadow ring-1 ring-black ring-opacity-5 focus:outline-none sm:text-sm">
                <ListboxOption as="template" v-for="assignee in assignees" :key="assignee.value" :value="assignee" v-slot="{ active }">
                  <li :class="[active ? 'bg-gray-100' : 'bg-white', 'relative cursor-default select-none py-2 px-3']">
                    <div class="flex items-center">
                      <img v-if="assignee.avatar" :src="assignee.avatar" alt="" class="h-5 w-5 flex-shrink-0 rounded-full" />
                      <UserCircleIcon v-else class="h-5 w-5 flex-shrink-0 text-gray-400" aria-hidden="true" />
                      <span class="ml-3 block truncate font-medium">{{ assignee.name }}</span>
                    </div>
                  </li>
                </ListboxOption>
              </ListboxOptions>
            </transition>
          </div>
        </Listbox>

        <Listbox as="div" v-model="labelled" class="flex-shrink-0">
          <ListboxLabel class="sr-only"> Add a label </ListboxLabel>
          <div class="relative">
            <ListboxButton class="relative inline-flex items-center whitespace-nowrap rounded-full bg-gray-50 py-2 px-2 text-sm font-medium text-gray-500 hover:bg-gray-100 sm:px-3">
              <TagIcon :class="[labelled.value === null ? 'text-gray-300' : 'text-gray-500', 'h-5 w-5 flex-shrink-0 sm:-ml-1']" aria-hidden="true" />
              <span :class="[labelled.value === null ? '' : 'text-gray-900', 'hidden truncate sm:ml-2 sm:block']">{{ labelled.value === null ? 'Label' : labelled.name }}</span>
            </ListboxButton>

            <transition leave-active-class="transition ease-in duration-100" leave-from-class="opacity-100" leave-to-class="opacity-0">
              <ListboxOptions class="absolute right-0 z-10 mt-1 max-h-56 w-52 overflow-auto rounded-lg bg-white py-3 text-base shadow ring-1 ring-black ring-opacity-5 focus:outline-none sm:text-sm">
                <ListboxOption as="template" v-for="label in labels" :key="label.value" :value="label" v-slot="{ active }">
                  <li :class="[active ? 'bg-gray-100' : 'bg-white', 'relative cursor-default select-none py-2 px-3']">
                    <div class="flex items-center">
                      <span class="block truncate font-medium">{{ label.name }}</span>
                    </div>
                  </li>
                </ListboxOption>
              </ListboxOptions>
            </transition>
          </div>
        </Listbox>

        <Listbox as="div" v-model="dated" class="flex-shrink-0">
          <ListboxLabel class="sr-only"> Add a due date </ListboxLabel>
          <div class="relative">
            <ListboxButton class="relative inline-flex items-center whitespace-nowrap rounded-full bg-gray-50 py-2 px-2 text-sm font-medium text-gray-500 hover:bg-gray-100 sm:px-3">
              <CalendarIcon :class="[dated.value === null ? 'text-gray-300' : 'text-gray-500', 'h-5 w-5 flex-shrink-0 sm:-ml-1']" aria-hidden="true" />
              <span :class="[dated.value === null ? '' : 'text-gray-900', 'hidden truncate sm:ml-2 sm:block']">{{ dated.value === null ? 'Due date' : dated.name }}</span>
            </ListboxButton>

            <transition leave-active-class="transition ease-in duration-100" leave-from-class="opacity-100" leave-to-class="opacity-0">
              <ListboxOptions class="absolute right-0 z-10 mt-1 max-h-56 w-52 overflow-auto rounded-lg bg-white py-3 text-base shadow ring-1 ring-black ring-opacity-5 focus:outline-none sm:text-sm">
                <ListboxOption as="template" v-for="dueDate in dueDates" :key="dueDate.value" :value="dueDate" v-slot="{ active }">
                  <li :class="[active ? 'bg-gray-100' : 'bg-white', 'relative cursor-default select-none py-2 px-3']">
                    <div class="flex items-center">
                      <span class="block truncate font-medium">{{ dueDate.name }}</span>
                    </div>
                  </li>
                </ListboxOption>
              </ListboxOptions>
            </transition>
          </div>
        </Listbox>
      </div>
      <div class="flex items-center justify-between space-x-3 border-t border-gray-200 px-2 py-2 sm:px-3">
        <div class="flex">
          <button type="button" class="group -my-2 -ml-2 inline-flex items-center rounded-full px-3 py-2 text-left text-gray-400">
            <PaperClipIcon class="-ml-1 mr-2 h-5 w-5 group-hover:text-gray-500" aria-hidden="true" />
            <span class="text-sm italic text-gray-500 group-hover:text-gray-600">Attach a file</span>
          </button>
        </div>
        <div class="flex-shrink-0">
          <button type="submit" class="inline-flex items-center rounded-md border border-transparent bg-indigo-600 px-4 py-2 text-sm font-medium text-white shadow-sm hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:ring-offset-2">Create</button>
        </div>
      </div>
    </div>
  </form>
</template>

<script setup>
import { ref } from 'vue'
import { Listbox, ListboxButton, ListboxLabel, ListboxOption, ListboxOptions } from '@headlessui/vue'
import { CalendarIcon, PaperClipIcon, TagIcon, UserCircleIcon } from '@heroicons/vue/20/solid'

const assignees = [
  { name: 'Unassigned', value: null },
  {
    name: 'Wade Cooper',
    value: 'wade-cooper',
    avatar:
      'https://images.unsplash.com/photo-1491528323818-fdd1faba62cc?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=facearea&facepad=2&w=256&h=256&q=80',
  },
  // More items...
]
const labels = [
  { name: 'Unlabelled', value: null },
  { name: 'Engineering', value: 'engineering' },
  // More items...
]
const dueDates = [
  { name: 'No due date', value: null },
  { name: 'Today', value: 'today' },
  // More items...
]

const assigned = ref(assignees[0])
const labelled = ref(labels[0])
const dated = ref(dueDates[0])
</script>