/**
 * @license
 * Copyright (c) 2021 - 2026 Vaadin Ltd.
 * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
 */
import { ElementMixin } from '@vaadin/component-base/src/element-mixin.js';
import { ThemableMixin } from '@vaadin/vaadin-themable-mixin/vaadin-themable-mixin.js';
import { NumberFieldMixin } from './vaadin-number-field-mixin.js';

/**
 * Fired when the user commits a value change.
 */
export type NumberFieldChangeEvent = Event & {
  target: NumberField;
};

/**
 * Fired when the user commits an unparsable value change and there is no change event.
 */
export type NumberFieldUnparsableChangeEvent = CustomEvent;

/**
 * Fired when the `invalid` property changes.
 */
export type NumberFieldInvalidChangedEvent = CustomEvent<{ value: boolean }>;

/**
 * Fired when the `value` property changes.
 */
export type NumberFieldValueChangedEvent = CustomEvent<{ value: string }>;

/**
 * Fired whenever the field is validated.
 */
export type NumberFieldValidatedEvent = CustomEvent<{ valid: boolean }>;

export interface NumberFieldCustomEventMap {
  'unparsable-change': NumberFieldUnparsableChangeEvent;

  'invalid-changed': NumberFieldInvalidChangedEvent;

  'value-changed': NumberFieldValueChangedEvent;

  validated: NumberFieldValidatedEvent;
}

export interface NumberFieldEventMap extends HTMLElementEventMap, NumberFieldCustomEventMap {
  change: NumberFieldChangeEvent;
}

/**
 * `<vaadin-number-field>` is an input field web component that only accepts numeric input.
 *
 * ```html
 * <vaadin-number-field label="Balance"></vaadin-number-field>
 * ```
 *
 * ### Styling
 *
 * The following shadow DOM parts are available for styling:
 *
 * Part name            | Description
 * ---------------------|----------------
 * `label`              | The label element
 * `input-field`        | The element that wraps prefix, value and suffix
 * `field-button`       | Set on clear, decrease and increase buttons
 * `clear-button`       | The clear button
 * `error-message`      | The error message element
 * `helper-text`        | The helper text element wrapper
 * `required-indicator` | The `required` state indicator element
 * `increase-button`    | Increase ("plus") button
 * `decrease-button`    | Decrease ("minus") button
 *
 * The following state attributes are available for styling:
 *
 * Attribute            | Description
 * ---------------------|---------------------------------
 * `disabled`           | Set when the element is disabled
 * `has-value`          | Set when the element has a value
 * `has-label`          | Set when the element has a label
 * `has-helper`         | Set when the element has helper text or slot
 * `has-error-message`  | Set when the element has an error message
 * `has-tooltip`        | Set when the element has a slotted tooltip
 * `invalid`            | Set when the element is invalid
 * `input-prevented`    | Temporarily set when invalid input is prevented
 * `focused`            | Set when the element is focused
 * `focus-ring`         | Set when the element is keyboard focused
 * `readonly`           | Set when the element is readonly
 *
 * Note, the `input-prevented` state attribute is only supported when `allowedCharPattern` is set.
 *
 * See [Styling Components](https://vaadin.com/docs/latest/styling/styling-components) documentation.
 *
 * ### Change events
 *
 * Depending on the nature of the value change that the user attempts to commit e.g. by pressing Enter,
 * the component can fire either a `change` event or an `unparsable-change` event:
 *
 * Value change             | Event
 * :------------------------|:------------------
 * empty => parsable        | change
 * empty => unparsable      | unparsable-change
 * parsable => empty        | change
 * parsable => parsable     | change
 * parsable => unparsable   | change
 * unparsable => empty      | unparsable-change
 * unparsable => parsable   | change
 * unparsable => unparsable | -
 *
 * Note, there is currently no way to detect unparsable => unparsable changes because the browser
 * doesn't provide access to unparsable values of native [type=number] inputs.
 *
 * @fires {Event} input - Fired when the value is changed by the user: on every typing keystroke, and the value is cleared using the clear button.
 * @fires {Event} change - Fired when the user commits a value change.
 * @fires {Event} unparsable-change - Fired when the user commits an unparsable value change and there is no change event.
 * @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.
 */
declare class NumberField extends NumberFieldMixin(ThemableMixin(ElementMixin(HTMLElement))) {
  addEventListener<K extends keyof NumberFieldEventMap>(
    type: K,
    listener: (this: NumberField, ev: NumberFieldEventMap[K]) => void,
    options?: AddEventListenerOptions | boolean,
  ): void;

  removeEventListener<K extends keyof NumberFieldEventMap>(
    type: K,
    listener: (this: NumberField, ev: NumberFieldEventMap[K]) => void,
    options?: EventListenerOptions | boolean,
  ): void;
}

declare global {
  interface HTMLElementTagNameMap {
    'vaadin-number-field': NumberField;
  }
}

export { NumberField };