import type { TemplateResult } from 'lit';
import { html, isServer } from 'lit';
import { customElement, property, query, state } from 'lit/decorators.js';
import { classMap } from 'lit/directives/class-map.js';
import { unsafeHTML } from 'lit/directives/unsafe-html.js';
import { WaAfterHideEvent } from '../../events/after-hide.js';
import { WaAfterShowEvent } from '../../events/after-show.js';
import { WaBlurEvent } from '../../events/blur.js';
import { WaChangeEvent } from '../../events/change.js';
import { WaClearEvent } from '../../events/clear.js';
import { WaFocusEvent } from '../../events/focus.js';
import { WaHideEvent } from '../../events/hide.js';
import { WaInputEvent } from '../../events/input.js';
import type { WaRemoveEvent } from '../../events/remove.js';
import { WaShowEvent } from '../../events/show.js';
import { animateWithClass } from '../../internal/animate.js';
import { waitForEvent } from '../../internal/event.js';
import { scrollIntoView } from '../../internal/scroll.js';
import { HasSlotController } from '../../internal/slot.js';
import { RequiredValidator } from '../../internal/validators/required-validator.js';
import { watch } from '../../internal/watch.js';
import { WebAwesomeFormAssociatedElement } from '../../internal/webawesome-element.js';
import formControlStyles from '../../styles/shadow/form-control.css';
import { LocalizeController } from '../../utilities/localize.js';
import '../icon/icon.js';
import type WaOption from '../option/option.js';
import '../popup/popup.js';
import type WaPopup from '../popup/popup.js';
import '../tag/tag.js';
import styles from './select.css';

/**
 * @summary Selects allow you to choose items from a menu of predefined options.
 * @documentation https://backers.webawesome.com/docs/components/select
 * @status stable
 * @since 2.0
 *
 * @dependency wa-icon
 * @dependency wa-popup
 * @dependency wa-tag
 *
 * @slot - The listbox options. Must be `<wa-option>` elements. You can use `<wa-divider>` to group items visually.
 * @slot label - The input's label. Alternatively, you can use the `label` attribute.
 * @slot prefix - Used to prepend a presentational icon or similar element to the combobox.
 * @slot suffix - Used to append a presentational icon or similar element to the combobox.
 * @slot clear-icon - An icon to use in lieu of the default clear icon.
 * @slot expand-icon - The icon to show when the control is expanded and collapsed. Rotates on open and close.
 * @slot hint - Text that describes how to use the input. Alternatively, you can use the `hint` attribute.
 *
 * @event wa-change - Emitted when the control's value changes.
 * @event wa-clear - Emitted when the control's value is cleared.
 * @event wa-input - Emitted when the control receives input.
 * @event wa-focus - Emitted when the control gains focus.
 * @event wa-blur - Emitted when the control loses focus.
 * @event wa-show - Emitted when the select's menu opens.
 * @event wa-after-show - Emitted after the select's menu opens and all animations are complete.
 * @event wa-hide - Emitted when the select's menu closes.
 * @event wa-after-hide - Emitted after the select's menu closes and all animations are complete.
 * @event wa-invalid - Emitted when the form control has been checked for validity and its constraints aren't satisfied.
 *
 * @csspart form-control - The form control that wraps the label, input, and hint.
 * @csspart form-control-label - The label's wrapper.
 * @csspart form-control-input - The select's wrapper.
 * @csspart hint - The hint's wrapper.
 * @csspart combobox - The container the wraps the prefix, suffix, combobox, clear icon, and expand button.
 * @csspart prefix - The container that wraps the prefix slot.
 * @csspart suffix - The container that wraps the suffix slot.
 * @csspart display-input - The element that displays the selected option's label, an `<input>` element.
 * @csspart listbox - The listbox container where options are slotted.
 * @csspart tags - The container that houses option tags when `multiselect` is used.
 * @csspart tag - The individual tags that represent each multiselect option.
 * @csspart tag__base - The tag's base part.
 * @csspart tag__content - The tag's content part.
 * @csspart tag__remove-button - The tag's remove button.
 * @csspart tag__remove-button__base - The tag's remove button base part.
 * @csspart clear-button - The clear button.
 * @csspart expand-icon - The container that wraps the expand icon.
 *
 * @cssproperty --background-color - The background color of the select's combobox.
 * @cssproperty --border-color - The border color of the select's combobox.
 * @cssproperty --border-radius - The border radius of the select's combobox.
 * @cssproperty --border-style - The style of the select's borders, including the listbox.
 * @cssproperty --border-width - The width of the select's borders, including the listbox.
 * @cssproperty --box-shadow - The shadow effects around the edges of the select's combobox.
 */
@customElement('wa-select')
export default class WaSelect extends WebAwesomeFormAssociatedElement {
  static shadowStyle = [formControlStyles, styles];

  static get validators() {
    const validators = isServer
      ? []
      : [
          RequiredValidator({
            validationElement: Object.assign(document.createElement('select'), { required: true })
          })
        ];
    return [...super.validators, ...validators];
  }

  assumeInteractionOn = ['wa-blur', 'wa-input'];

  private readonly hasSlotController = new HasSlotController(this, 'hint', 'label');
  private readonly localize = new LocalizeController(this);
  private typeToSelectString = '';
  private typeToSelectTimeout: number;
  private closeWatcher: CloseWatcher | null;

  @query('.select') popup: WaPopup;
  @query('.select__combobox') combobox: HTMLSlotElement;
  @query('.select__display-input') displayInput: HTMLInputElement;
  @query('.select__value-input') valueInput: HTMLInputElement;
  @query('.select__listbox') listbox: HTMLSlotElement;

  /** Where to anchor native constraint validation */
  get validationTarget() {
    return this.valueInput;
  }

  @state() private hasFocus = false;
  @state() displayLabel = '';
  @state() currentOption: WaOption;
  @state() selectedOptions: WaOption[] = [];

  /** The name of the select, submitted as a name/value pair with form data. */
  @property() name = '';

  private _defaultValue: string | string[] = '';

  @property({
    attribute: 'value',
    reflect: true,
    converter: {
      fromAttribute: (value: string) => value.split(' '),
      toAttribute: (value: string | string[]) => (Array.isArray(value) ? value.join(' ') : value)
    }
  })
  set defaultValue(val: string | string[]) {
    this._defaultValue = this.convertDefaultValue(val);
  }

  get defaultValue() {
    if (!this.hasUpdated) {
      this._defaultValue = this.convertDefaultValue(this._defaultValue);
    }
    return this._defaultValue;
  }

  /**
   * @private
   * A converter for defaultValue from array to string if its multiple. Also fixes some hydration issues.
   */
  private convertDefaultValue(val: typeof this.defaultValue) {
    // For some reason this can go off before we've fully updated. So check the attribute too.
    const isMultiple = this.multiple || this.hasAttribute('multiple');

    if (!isMultiple && Array.isArray(val)) {
      val = val.join(' ');
    }

    return val;
  }

  @property({ attribute: false }) value: string | string[] | null = null;

  /** The select's size. */
  @property({ reflect: true }) size: 'small' | 'medium' | 'large' = 'medium';

  /** Placeholder text to show as a hint when the select is empty. */
  @property() placeholder = '';

  /** Allows more than one option to be selected. */
  @property({ type: Boolean, reflect: true }) multiple = false;

  /**
   * The maximum number of selected options to show when `multiple` is true. After the maximum, "+n" will be shown to
   * indicate the number of additional items that are selected. Set to 0 to remove the limit.
   */
  @property({ attribute: 'max-options-visible', type: Number }) maxOptionsVisible = 3;

  /** Disables the select control. */
  @property({ type: Boolean }) disabled = false;

  /** Adds a clear button when the select is not empty. */
  @property({ type: Boolean }) clearable = false;

  /**
   * Indicates whether or not the select is open. You can toggle this attribute to show and hide the menu, or you can
   * use the `show()` and `hide()` methods and this attribute will reflect the select's open state.
   */
  @property({ type: Boolean, reflect: true }) open = false;

  /**
   * Enable this option to prevent the listbox from being clipped when the component is placed inside a container with
   * `overflow: auto|scroll`. Hoisting uses a fixed positioning strategy that works in many, but not all, scenarios.
   */
  @property({ type: Boolean }) hoist = false;

  /** Draws a filled select. */
  @property({ type: Boolean, reflect: true }) filled = false;

  /** Draws a pill-style select with rounded edges. */
  @property({ type: Boolean, reflect: true }) pill = false;

  /** The select's label. If you need to display HTML, use the `label` slot instead. */
  @property() label = '';

  /**
   * The preferred placement of the select's menu. Note that the actual placement may vary as needed to keep the listbox
   * inside of the viewport.
   */
  @property({ reflect: true }) placement: 'top' | 'bottom' = 'bottom';

  /** The select's hint. If you need to display HTML, use the `hint` slot instead. */
  @property({ attribute: 'hint' }) hint = '';

  /**
   * Used for SSR purposes when a label is slotted in. Will show the label on first render.
   */
  @property({ attribute: 'with-label', type: Boolean }) withLabel = false;

  /**
   * Used for SSR purposes when hint is slotted in. Will show the hint on first render.
   */
  @property({ attribute: 'with-hint', type: Boolean }) withHint = false;

  /**
   * By default, form controls are associated with the nearest containing `<form>` element. This attribute allows you
   * to place the form control outside of a form and associate it with the form that has this `id`. The form must be in
   * the same document or shadow root for this to work.
   */
  @property({ reflect: true }) form = null;

  /** The select's required attribute. */
  @property({ type: Boolean, reflect: true }) required = false;

  /**
   * A function that customizes the tags to be rendered when multiple=true. The first argument is the option, the second
   * is the current tag's index.  The function should return either a Lit TemplateResult or a string containing trusted
   * HTML of the symbol to render at the specified value.
   */
  @property() getTag: (option: WaOption, index: number) => TemplateResult | string | HTMLElement = option => {
    return html`
      <wa-tag
        part="tag"
        exportparts="
              base:tag__base,
              content:tag__content,
              remove-button:tag__remove-button,
              remove-button__base:tag__remove-button__base
            "
        ?pill=${this.pill}
        size=${this.size}
        removable
        @wa-remove=${(event: WaRemoveEvent) => this.handleTagRemove(event, option)}
      >
        ${option.getTextLabel()}
      </wa-tag>
    `;
  };

  connectedCallback() {
    super.connectedCallback();

    this.handleDefaultSlotChange();

    // Because this is a form control, it shouldn't be opened initially
    this.open = false;
  }

  private addOpenListeners() {
    //
    // Listen on the root node instead of the document in case the elements are inside a shadow root
    //
    // https://github.com/shoelace-style/shoelace/issues/1763
    //
    document.addEventListener('focusin', this.handleDocumentFocusIn);
    document.addEventListener('keydown', this.handleDocumentKeyDown);
    document.addEventListener('mousedown', this.handleDocumentMouseDown);

    // If the component is rendered in a shadow root, we need to attach the focusin listener there too
    if (this.getRootNode() !== document) {
      this.getRootNode().addEventListener('focusin', this.handleDocumentFocusIn);
    }

    if ('CloseWatcher' in window) {
      this.closeWatcher?.destroy();
      this.closeWatcher = new CloseWatcher();
      this.closeWatcher.onclose = () => {
        if (this.open) {
          this.hide();
          this.displayInput.focus({ preventScroll: true });
        }
      };
    }
  }

  private removeOpenListeners() {
    document.removeEventListener('focusin', this.handleDocumentFocusIn);
    document.removeEventListener('keydown', this.handleDocumentKeyDown);
    document.removeEventListener('mousedown', this.handleDocumentMouseDown);

    if (this.getRootNode() !== document) {
      this.getRootNode().removeEventListener('focusin', this.handleDocumentFocusIn);
    }

    this.closeWatcher?.destroy();
  }

  private handleFocus() {
    this.hasFocus = true;
    this.displayInput.setSelectionRange(0, 0);
    this.dispatchEvent(new WaFocusEvent());
  }

  private handleBlur() {
    this.hasFocus = false;
    this.dispatchEvent(new WaBlurEvent());
  }

  private handleDocumentFocusIn = (event: KeyboardEvent) => {
    // Close when focusing out of the select
    const path = event.composedPath();
    if (this && !path.includes(this)) {
      this.hide();
    }
  };

  private handleDocumentKeyDown = (event: KeyboardEvent) => {
    const target = event.target as HTMLElement;
    const isClearButton = target.closest('.select__clear') !== null;
    const isIconButton = target.closest('wa-icon-button') !== null;

    // Ignore presses when the target is an icon button (e.g. the remove button in `<wa-tag>`)
    if (isClearButton || isIconButton) {
      return;
    }

    // Close when pressing escape
    if (event.key === 'Escape' && this.open) {
      event.preventDefault();
      event.stopPropagation();
      this.hide();
      this.displayInput.focus({ preventScroll: true });
    }

    // Handle enter and space. When pressing space, we allow for type to select behaviors so if there's anything in the
    // buffer we _don't_ close it.
    if (event.key === 'Enter' || (event.key === ' ' && this.typeToSelectString === '')) {
      event.preventDefault();
      event.stopImmediatePropagation();

      // If it's not open, open it
      if (!this.open) {
        this.show();
        return;
      }

      // If it is open, update the value based on the current selection and close it
      if (this.currentOption && !this.currentOption.disabled) {
        this.valueHasChanged = true;
        if (this.multiple) {
          this.toggleOptionSelection(this.currentOption);
        } else {
          this.setSelectedOptions(this.currentOption);
        }

        // Emit after updating
        this.updateComplete.then(() => {
          this.dispatchEvent(new WaInputEvent());
          this.dispatchEvent(new WaChangeEvent());
        });

        if (!this.multiple) {
          this.hide();
          this.displayInput.focus({ preventScroll: true });
        }
      }

      return;
    }

    // Navigate options
    if (['ArrowUp', 'ArrowDown', 'Home', 'End'].includes(event.key)) {
      const allOptions = this.getAllOptions();
      const currentIndex = allOptions.indexOf(this.currentOption);
      let newIndex = Math.max(0, currentIndex);

      // Prevent scrolling
      event.preventDefault();

      // Open it
      if (!this.open) {
        this.show();

        // If an option is already selected, stop here because we want that one to remain highlighted when the listbox
        // opens for the first time
        if (this.currentOption) {
          return;
        }
      }

      if (event.key === 'ArrowDown') {
        newIndex = currentIndex + 1;
        if (newIndex > allOptions.length - 1) newIndex = 0;
      } else if (event.key === 'ArrowUp') {
        newIndex = currentIndex - 1;
        if (newIndex < 0) newIndex = allOptions.length - 1;
      } else if (event.key === 'Home') {
        newIndex = 0;
      } else if (event.key === 'End') {
        newIndex = allOptions.length - 1;
      }

      this.setCurrentOption(allOptions[newIndex]);
    }

    // All other "printable" keys trigger type to select
    if (event.key?.length === 1 || event.key === 'Backspace') {
      const allOptions = this.getAllOptions();

      // Don't block important key combos like CMD+R
      if (event.metaKey || event.ctrlKey || event.altKey) {
        return;
      }

      // Open, unless the key that triggered is backspace
      if (!this.open) {
        if (event.key === 'Backspace') {
          return;
        }

        this.show();
      }

      event.stopPropagation();
      event.preventDefault();

      clearTimeout(this.typeToSelectTimeout);
      this.typeToSelectTimeout = window.setTimeout(() => (this.typeToSelectString = ''), 1000);

      if (event.key === 'Backspace') {
        this.typeToSelectString = this.typeToSelectString.slice(0, -1);
      } else {
        this.typeToSelectString += event.key.toLowerCase();
      }

      for (const option of allOptions) {
        const label = option.getTextLabel().toLowerCase();

        if (label.startsWith(this.typeToSelectString)) {
          this.setCurrentOption(option);
          break;
        }
      }
    }
  };

  private handleDocumentMouseDown = (event: MouseEvent) => {
    // Close when clicking outside of the select
    const path = event.composedPath();
    if (this && !path.includes(this)) {
      this.hide();
    }
  };

  private handleLabelClick() {
    this.displayInput.focus();
  }

  private handleComboboxMouseDown(event: MouseEvent) {
    const path = event.composedPath();
    const isIconButton = path.some(el => el instanceof Element && el.tagName.toLowerCase() === 'wa-icon-button');

    // Ignore disabled controls and clicks on tags (remove buttons)
    if (this.disabled || isIconButton) {
      return;
    }

    event.preventDefault();
    this.displayInput.focus({ preventScroll: true });
    this.open = !this.open;
  }

  private handleComboboxKeyDown(event: KeyboardEvent) {
    event.stopPropagation();
    this.handleDocumentKeyDown(event);
  }

  private handleClearClick(event: MouseEvent) {
    event.stopPropagation();

    if (this.value !== '') {
      this.setSelectedOptions([]);
      this.displayInput.focus({ preventScroll: true });

      // Emit after update
      this.updateComplete.then(() => {
        this.dispatchEvent(new WaClearEvent());
        this.dispatchEvent(new WaInputEvent());
        this.dispatchEvent(new WaChangeEvent());
      });
    }
  }

  private handleClearMouseDown(event: MouseEvent) {
    // Don't lose focus or propagate events when clicking the clear button
    event.stopPropagation();
    event.preventDefault();
  }

  private handleOptionClick(event: MouseEvent) {
    const target = event.target as HTMLElement;
    const option = target.closest('wa-option');
    const oldValue = this.value;

    if (option && !option.disabled) {
      this.valueHasChanged = true;
      if (this.multiple) {
        this.toggleOptionSelection(option);
      } else {
        this.setSelectedOptions(option);
      }

      // Set focus after updating so the value is announced by screen readers
      this.updateComplete.then(() => this.displayInput.focus({ preventScroll: true }));

      if (this.value !== oldValue) {
        // Emit after updating
        this.updateComplete.then(() => {
          this.dispatchEvent(new WaInputEvent());
          this.dispatchEvent(new WaChangeEvent());
        });
      }

      if (!this.multiple) {
        this.hide();
        this.displayInput.focus({ preventScroll: true });
      }
    }
  }

  /* @internal - used by options to update labels */
  public handleDefaultSlotChange() {
    if (!customElements.get('wa-option')) {
      customElements.whenDefined('wa-option').then(() => this.handleDefaultSlotChange());
    }

    const allOptions = this.getAllOptions();
    const val = this.valueHasChanged ? this.value : this.defaultValue;
    const value = Array.isArray(val) ? val : [val];
    const values: string[] = [];

    // Check for duplicate values in menu items
    allOptions.forEach(option => values.push(option.value));

    // Select only the options that match the new value
    this.setSelectedOptions(allOptions.filter(el => value.includes(el.value)));
  }

  private handleTagRemove(event: WaRemoveEvent, option: WaOption) {
    event.stopPropagation();

    if (!this.disabled) {
      this.toggleOptionSelection(option, false);

      // Emit after updating
      this.updateComplete.then(() => {
        this.dispatchEvent(new WaInputEvent());
        this.dispatchEvent(new WaChangeEvent());
      });
    }
  }

  // Gets an array of all `<wa-option>` elements
  private getAllOptions() {
    return [...this.querySelectorAll<WaOption>('wa-option')];
  }

  // Gets the first `<wa-option>` element
  private getFirstOption() {
    return this.querySelector<WaOption>('wa-option');
  }

  // Sets the current option, which is the option the user is currently interacting with (e.g. via keyboard). Only one
  // option may be "current" at a time.
  private setCurrentOption(option: WaOption | null) {
    const allOptions = this.getAllOptions();

    // Clear selection
    allOptions.forEach(el => {
      el.current = false;
      el.tabIndex = -1;
    });

    // Select the target option
    if (option) {
      this.currentOption = option;
      option.current = true;
      option.tabIndex = 0;
      option.focus();
    }
  }

  // Sets the selected option(s)
  private setSelectedOptions(option: WaOption | WaOption[]) {
    const allOptions = this.getAllOptions();
    const newSelectedOptions = Array.isArray(option) ? option : [option];

    // Clear existing selection
    allOptions.forEach(el => (el.selected = false));

    // Set the new selection
    if (newSelectedOptions.length) {
      newSelectedOptions.forEach(el => (el.selected = true));
    }

    // Update selection, value, and display label
    this.selectionChanged();
  }

  // Toggles an option's selected state
  private toggleOptionSelection(option: WaOption, force?: boolean) {
    if (force === true || force === false) {
      option.selected = force;
    } else {
      option.selected = !option.selected;
    }

    this.selectionChanged();
  }

  // This method must be called whenever the selection changes. It will update the selected options cache, the current
  // value, and the display value
  private selectionChanged() {
    const options = this.getAllOptions();

    // Update selected options cache
    this.selectedOptions = options.filter(el => el.selected);

    // Update the value and display label
    if (this.multiple) {
      this.value = this.selectedOptions.map(el => el.value);

      if (this.placeholder && this.value.length === 0) {
        // When no items are selected, keep the value empty so the placeholder shows
        this.displayLabel = '';
      } else {
        this.displayLabel = this.localize.term('numOptionsSelected', this.selectedOptions.length);
      }
    } else {
      const selectedOption = this.selectedOptions[0];
      this.value = selectedOption?.value ?? '';
      this.displayLabel = selectedOption?.getTextLabel?.() ?? '';
    }

    // Update validity
    this.updateComplete.then(() => {
      this.updateValidity();
    });
  }
  protected get tags() {
    return this.selectedOptions.map((option, index) => {
      if (index < this.maxOptionsVisible || this.maxOptionsVisible <= 0) {
        const tag = this.getTag(option, index);
        // Wrap so we can handle the remove
        return html`<div @wa-remove=${(e: WaRemoveEvent) => this.handleTagRemove(e, option)}>
          ${typeof tag === 'string' ? unsafeHTML(tag) : tag}
        </div>`;
      } else if (index === this.maxOptionsVisible) {
        // Hit tag limit
        return html`<wa-tag>+${this.selectedOptions.length - index}</wa-tag>`;
      }
      return html``;
    });
  }

  @watch('disabled', { waitUntilFirstUpdate: true })
  handleDisabledChange() {
    // Close the listbox when the control is disabled
    if (this.disabled) {
      this.open = false;
      this.handleOpenChange();
    }
  }

  @watch('value', { waitUntilFirstUpdate: true })
  handleValueChange() {
    const allOptions = this.getAllOptions();
    const value = Array.isArray(this.value) ? this.value : [this.value];

    // Select only the options that match the new value
    this.setSelectedOptions(allOptions.filter(el => value.includes(el.value)));
    this.updateValidity();
  }

  @watch('open', { waitUntilFirstUpdate: true })
  async handleOpenChange() {
    if (this.open && !this.disabled) {
      // Reset the current option
      this.setCurrentOption(this.selectedOptions[0] || this.getFirstOption());

      // Show
      const waShowEvent = new WaShowEvent();
      this.dispatchEvent(waShowEvent);
      if (waShowEvent.defaultPrevented) {
        this.open = false;
        return;
      }

      this.addOpenListeners();
      this.listbox.hidden = false;
      this.popup.active = true;

      // Select the appropriate option based on value after the listbox opens
      requestAnimationFrame(() => {
        this.setCurrentOption(this.currentOption);
      });

      await animateWithClass(this.popup.popup, 'show');

      // Make sure the current option is scrolled into view (required for Safari)
      if (this.currentOption) {
        scrollIntoView(this.currentOption, this.listbox, 'vertical', 'auto');
      }

      this.dispatchEvent(new WaAfterShowEvent());
    } else {
      // Hide
      const waHideEvent = new WaHideEvent();
      this.dispatchEvent(waHideEvent);
      if (waHideEvent.defaultPrevented) {
        this.open = false;
        return;
      }

      this.removeOpenListeners();
      await animateWithClass(this.popup.popup, 'hide');
      this.listbox.hidden = true;
      this.popup.active = false;

      this.dispatchEvent(new WaAfterHideEvent());
    }
  }

  /** Shows the listbox. */
  async show() {
    if (this.open || this.disabled) {
      this.open = false;
      return undefined;
    }

    this.open = true;
    return waitForEvent(this, 'wa-after-show');
  }

  /** Hides the listbox. */
  async hide() {
    if (!this.open || this.disabled) {
      this.open = false;
      return undefined;
    }

    this.open = false;
    return waitForEvent(this, 'wa-after-hide');
  }

  /** Sets focus on the control. */
  focus(options?: FocusOptions) {
    this.displayInput.focus(options);
  }

  /** Removes focus from the control. */
  blur() {
    this.displayInput.blur();
  }

  formResetCallback() {
    this.value = this.defaultValue;
    super.formResetCallback();
    this.handleValueChange();
  }

  render() {
    const hasLabelSlot = this.hasUpdated ? this.hasSlotController.test('label') : this.withLabel;
    const hasHintSlot = this.hasUpdated ? this.hasSlotController.test('hint') : this.withHint;
    const hasLabel = this.label ? true : !!hasLabelSlot;
    const hasHint = this.hint ? true : !!hasHintSlot;
    const hasClearIcon =
      (this.hasUpdated || isServer) && this.clearable && !this.disabled && this.value && this.value.length > 0;
    const isPlaceholderVisible = Boolean(this.placeholder && (!this.value || this.value.length === 0));

    return html`
      <div
        part="form-control"
        class=${classMap({
          'form-control': true,
          'form-control--small': this.size === 'small',
          'form-control--medium': this.size === 'medium',
          'form-control--large': this.size === 'large',
          'form-control--has-label': hasLabel,
          'form-control--has-hint': hasHint
        })}
      >
        <label
          id="label"
          part="form-control-label"
          class="form-control__label"
          aria-hidden=${hasLabel ? 'false' : 'true'}
          @click=${this.handleLabelClick}
        >
          <slot name="label">${this.label}</slot>
        </label>

        <div part="form-control-input" class="form-control-input">
          <wa-popup
            class=${classMap({
              select: true,
              'select--standard': true,
              'select--filled': this.filled,
              'select--pill': this.pill,
              'select--open': this.open,
              'select--disabled': this.disabled,
              'select--multiple': this.multiple,
              'select--focused': this.hasFocus,
              'select--placeholder-visible': isPlaceholderVisible,
              'select--top': this.placement === 'top',
              'select--bottom': this.placement === 'bottom',
              'select--small': this.size === 'small',
              'select--medium': this.size === 'medium',
              'select--large': this.size === 'large'
            })}
            placement=${this.placement}
            strategy=${this.hoist ? 'fixed' : 'absolute'}
            flip
            shift
            sync="width"
            auto-size="vertical"
            auto-size-padding="10"
          >
            <div
              part="combobox"
              class="select__combobox"
              slot="anchor"
              @keydown=${this.handleComboboxKeyDown}
              @mousedown=${this.handleComboboxMouseDown}
            >
              <slot part="prefix" name="prefix" class="select__prefix"></slot>

              <input
                part="display-input"
                class="select__display-input"
                type="text"
                placeholder=${this.placeholder}
                .disabled=${this.disabled}
                .value=${this.displayLabel}
                ?required=${this.required}
                autocomplete="off"
                spellcheck="false"
                autocapitalize="off"
                readonly
                aria-invalid=${
                  !this.validity.valid
                  /** aria-invalid is required because readonly inputs are technically always valid so it never reads 'invalid data' for screen readers. */
                }
                aria-controls="listbox"
                aria-expanded=${this.open ? 'true' : 'false'}
                aria-haspopup="listbox"
                aria-labelledby="label"
                aria-disabled=${this.disabled ? 'true' : 'false'}
                aria-describedby="hint"
                role="combobox"
                tabindex="0"
                @focus=${this.handleFocus}
                @blur=${this.handleBlur}
              />

              <!-- Tags need to wait for first hydration before populating otherwise it will create a hydration mismatch. -->
              ${this.multiple && this.hasUpdated ? html`<div part="tags" class="select__tags">${this.tags}</div>` : ''}

              <input
                class="select__value-input"
                type="text"
                ?disabled=${this.disabled}
                ?required=${this.required}
                .value=${Array.isArray(this.value) ? this.value.join(', ') : this.value}
                tabindex="-1"
                aria-hidden="true"
                @focus=${() => this.focus()}
              />

              ${hasClearIcon
                ? html`
                    <button
                      part="clear-button"
                      class="select__clear"
                      type="button"
                      aria-label=${this.localize.term('clearEntry')}
                      @mousedown=${this.handleClearMouseDown}
                      @click=${this.handleClearClick}
                      tabindex="-1"
                    >
                      <slot name="clear-icon">
                        <wa-icon name="circle-xmark" library="system" variant="regular"></wa-icon>
                      </slot>
                    </button>
                  `
                : ''}

              <slot name="suffix" part="suffix" class="select__suffix"></slot>

              <slot name="expand-icon" part="expand-icon" class="select__expand-icon">
                <wa-icon library="system" name="chevron-down" variant="solid"></wa-icon>
              </slot>
            </div>

            <div
              id="listbox"
              role="listbox"
              aria-expanded=${this.open ? 'true' : 'false'}
              aria-multiselectable=${this.multiple ? 'true' : 'false'}
              aria-labelledby="label"
              part="listbox"
              class="select__listbox"
              tabindex="-1"
              @mouseup=${this.handleOptionClick}
              @slotchange=${this.handleDefaultSlotChange}
            >
              <slot></slot>
            </div>
          </wa-popup>
        </div>

        <slot
          name="hint"
          part="hint"
          class=${classMap({
            'has-slotted': hasHint
          })}
          aria-hidden=${hasHint ? 'false' : 'true'}
          >${this.hint}</slot
        >
      </div>
    `;
  }
}

declare global {
  interface HTMLElementTagNameMap {
    'wa-select': WaSelect;
  }
}