/**
 * @license
 * Copyright (c) 2019 - 2026 Vaadin Ltd.
 * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
 */
import { html, LitElement } from 'lit';
import { defineCustomElement } from '@vaadin/component-base/src/define.js';
import { ElementMixin } from '@vaadin/component-base/src/element-mixin.js';
import { PolylitMixin } from '@vaadin/component-base/src/polylit-mixin.js';
import { field } from '@vaadin/field-base/src/styles/field-base-styles.js';
import { LumoInjectionMixin } from '@vaadin/vaadin-themable-mixin/lumo-injection-mixin.js';
import { ThemableMixin } from '@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js';
import { CustomFieldMixin } from './vaadin-custom-field-mixin.js';

/**
 * `<vaadin-custom-field>` is a web component for wrapping multiple components as a single field.
 *
 * ```html
 * <vaadin-custom-field label="Appointment time">
 *   <vaadin-date-picker></vaadin-date-picker>
 *   <vaadin-time-picker></vaadin-time-picker>
 * </vaadin-custom-field>
 * ```
 *
 * ### Styling
 *
 * The following shadow DOM parts are available for styling:
 *
 * Part name            | Description
 * ---------------------|----------------
 * `label`              | The slotted label element wrapper
 * `helper-text`        | The slotted helper text element wrapper
 * `error-message`      | The slotted error message element wrapper
 * `required-indicator` | The `required` state indicator element
 * `input-fields`       | The slotted input elements wrapper
 *
 * The following state attributes are available for styling:
 *
 * Attribute           | Description
 * --------------------|--------------------------------
 * `invalid`           | Set when the element is invalid
 * `focused`           | Set when the element is focused
 * `has-label`         | Set when the element has a label
 * `has-value`         | Set when the element has a value
 * `has-helper`        | Set when the element has helper text
 * `has-error-message` | Set when the element has an error message
 * `has-tooltip`       | Set when the element has a slotted tooltip
 *
 * You may also manually set `disabled` or `readonly` attribute on this component to make the label
 * part look visually the same as on a `<vaadin-text-field>` when it is disabled or readonly.
 *
 * The following custom CSS properties are available for styling:
 *
 * Custom CSS property                                |
 * :--------------------------------------------------|
 * | `--vaadin-input-field-error-color`               |
 * | `--vaadin-input-field-error-font-size`           |
 * | `--vaadin-input-field-error-font-weight`         |
 * | `--vaadin-input-field-error-line-height`         |
 * | `--vaadin-input-field-label-color`               |
 * | `--vaadin-input-field-label-font-size`           |
 * | `--vaadin-input-field-label-font-weight`         |
 * | `--vaadin-input-field-label-line-height`         |
 * | `--vaadin-input-field-helper-color`              |
 * | `--vaadin-input-field-helper-font-size`          |
 * | `--vaadin-input-field-helper-font-weight`        |
 * | `--vaadin-input-field-helper-line-height`        |
 * | `--vaadin-input-field-required-indicator-color`  |
 * | `--vaadin-input-field-required-indicator`        |
 *
 * See [Styling Components](https://vaadin.com/docs/latest/styling/styling-components) documentation.
 *
 * @fires {Event} change - Fired when the user commits a value change for any of the internal inputs.
 * @fires {CustomEvent} invalid-changed - Fired when the `invalid` property changes.
 * @fires {CustomEvent} value-changed - Fired when the `value` property changes.
 * @fires {CustomEvent} validated - Fired whenever the field is validated.
 *
 * @customElement vaadin-custom-field
 * @extends HTMLElement
 * @mixes CustomFieldMixin
 * @mixes ElementMixin
 * @mixes ThemableMixin
 */
class CustomField extends CustomFieldMixin(ThemableMixin(ElementMixin(PolylitMixin(LumoInjectionMixin(LitElement))))) {
  static get is() {
    return 'vaadin-custom-field';
  }

  static get styles() {
    return field;
  }

  /** @protected */
  render() {
    return html`
      <div class="vaadin-custom-field-container">
        <div part="label" @click="${this.focus}">
          <slot name="label"></slot>
          <span part="required-indicator" aria-hidden="true"></span>
        </div>

        <div class="inputs-wrapper" part="input-fields" @change="${this._onInputChange}">
          <slot id="slot"></slot>
        </div>

        <div part="helper-text">
          <slot name="helper"></slot>
        </div>

        <div part="error-message">
          <slot name="error-message"></slot>
        </div>
      </div>

      <slot name="tooltip"></slot>
    `;
  }

  /**
   * Fired when the user commits a value change for any of the internal inputs.
   *
   * @event change
   */
}

defineCustomElement(CustomField);

export { CustomField };
