/**
 *
 * CommandMenu is a searchable command palette built on top of Menu. It provides an input
 * for filtering, keyboard navigation via forwarding to the underlying Menu, grouping support,
 * custom scoring, and slots for header/footer/item/submenulabel/empty content.
 *
 * [Live Demo](https://www.primevue.dev/commandmenu/)
 *
 * @module commandmenu
 *
 */
import type { DefineComponent, DesignToken, EmitFn, PassThrough } from '@primevue/core';
import type { ComponentHooks } from '@primevue/core/basecomponent';
import type { MenuItem } from 'primevue/menuitem';
import type { PassThroughOptions } from 'primevue/passthrough';
import type { Component, VNode } from 'vue';

export declare type CommandMenuPassThroughOptionType = CommandMenuPassThroughAttributes | ((options: CommandMenuPassThroughMethodOptions) => CommandMenuPassThroughAttributes | string) | string | null | undefined;

/**
 * Custom passthrough(pt) option method.
 */
export interface CommandMenuPassThroughMethodOptions {
    /**
     * Defines instance.
     */
    instance: any;
    /**
     * Defines valid properties.
     */
    props: CommandMenuProps;
    /**
     * Defines current inline state.
     */
    state: CommandMenuState;
    /**
     * Defines valid attributes.
     */
    attrs: any;
    /**
     * Defines parent options.
     */
    parent: any;
    /**
     * Defines passthrough(pt) options in global config.
     */
    global: object | undefined;
}

/**
 * Custom passthrough(pt) options.
 * @see {@link CommandMenuProps.pt}
 */
export interface CommandMenuPassThroughOptions {
    /**
     * Used to pass attributes to the root's DOM element.
     */
    root?: CommandMenuPassThroughOptionType;
    /**
     * Used to pass attributes to the header's DOM element.
     */
    header?: CommandMenuPassThroughOptionType;
    /**
     * Used to pass attributes to the search input's DOM element.
     */
    input?: CommandMenuPassThroughOptionType;
    /**
     * Used to pass attributes to the underlying Menu.
     */
    pcMenu?: CommandMenuPassThroughOptionType;
    /**
     * Used to pass attributes to the empty message's DOM element.
     */
    emptyMessage?: CommandMenuPassThroughOptionType;
    /**
     * Used to pass attributes to the footer's DOM element.
     */
    footer?: CommandMenuPassThroughOptionType;
    /**
     * Used to manage all lifecycle hooks.
     * @see {@link BaseComponent.ComponentHooks}
     */
    hooks?: ComponentHooks;
}

/**
 * Custom passthrough attributes for each DOM elements.
 */
export interface CommandMenuPassThroughAttributes {
    [key: string]: any;
}

/**
 * Defines current inline state in CommandMenu component.
 */
export interface CommandMenuState {
    /**
     * Current search string, two-way bound via `v-model:search`.
     */
    d_search: string;
    /**
     * ID of the currently focused item inside the underlying Menu, mirrored for aria-activedescendant.
     */
    focusedOptionId: string | null;
}

/**
 * A CommandMenu item is a Menu item plus an optional `keywords` field used by the default scorer.
 */
export interface CommandMenuItem extends MenuItem {
    /**
     * Extra terms fed to the default scorer alongside the label.
     */
    keywords?: string | string[];
    [key: string]: any;
}

/**
 * Custom filter/scoring function.
 * @param item - The raw item being scored.
 * @param search - Current search string.
 * @returns A positive number if the item matches (higher = better rank), or `0` / falsy to filter it out.
 */
export type CommandMenuFilterFunction = (item: CommandMenuItem, search: string) => number;

/**
 * Select event payload fired when an item is activated via Enter or click.
 */
export interface CommandMenuSelectEvent {
    /**
     * Originating browser event.
     */
    originalEvent: Event;
    /**
     * The activated item.
     */
    item: CommandMenuItem;
}

/**
 * Defines valid properties in CommandMenu component.
 */
export interface CommandMenuProps {
    /**
     * Menu items to display. Leaf items support `command`, `disabled`, `keywords` and any custom fields.
     * Groups are expressed as items with nested `items`.
     */
    model?: CommandMenuItem[] | null | undefined;
    /**
     * Current search string. Use with `v-model:search` for two-way binding.
     */
    search?: string | null | undefined;
    /**
     * Custom scoring function. Replaces the default substring scorer.
     */
    filter?: CommandMenuFilterFunction | null | undefined;
    /**
     * Placeholder for the search input.
     */
    placeholder?: string | undefined;
    /**
     * Text shown when `model` is empty. Defaults to the locale `emptyMessage`.
     */
    emptyMessage?: string;
    /**
     * Text shown when no items match the current search. Defaults to the locale `emptySearchMessage`.
     */
    emptyFilterMessage?: string;
    /**
     * Class applied to the underlying Menu, merged with the internal list class.
     */
    menuClass?: string | object | Array<string | object> | null | undefined;
    /**
     * Inline style applied to the underlying Menu.
     */
    menuStyle?: string | object | Array<string | object> | null | undefined;
    /**
     * Accessible label for the underlying Menu. Forwarded as `aria-label`.
     */
    ariaLabel?: string;
    /**
     * Id of an external element that labels the underlying Menu. Forwarded as `aria-labelledby`.
     */
    ariaLabelledby?: string;
    /**
     * Use to change the HTML tag of root element.
     * @defaultValue DIV
     */
    as?: string | Component | undefined;
    /**
     * When enabled, it changes the default rendered element for the one passed as a child element.
     * @defaultValue false
     */
    asChild?: boolean | undefined;
    /**
     * It generates scoped CSS variables using design tokens for the component.
     */
    dt?: DesignToken<any>;
    /**
     * Used to pass attributes to DOM elements inside the component.
     * @type {CommandMenuPassThroughOptions}
     */
    pt?: PassThrough<CommandMenuPassThroughOptions>;
    /**
     * Used to configure passthrough(pt) options of the component.
     * @type {PassThroughOptions}
     */
    ptOptions?: PassThroughOptions;
    /**
     * When enabled, it removes component related styles in the core.
     * @defaultValue false
     */
    unstyled?: boolean;
}

/**
 * Defines valid slots in CommandMenu component.
 */
export interface CommandMenuSlots {
    /**
     * Default slot is only used when `asChild` is enabled — receives `class`.
     * @param {Object} scope - default slot's params.
     */
    default(scope: {
        /**
         * Computed class name for the root.
         */
        class: string | object | Array<string | object>;
    }): VNode[];
    /**
     * Custom header content. Replaces the default search input; use the exposed
     * `inputProps` to keep the keyboard bridge and ARIA wiring intact.
     * @param {Object} scope - header slot's params.
     */
    header(scope: {
        /**
         * Current search value.
         */
        value: string;
        /**
         * Bindings to spread on the custom input element — `role`, `aria-*`,
         * `placeholder`, `onKeydown` and `onInput` handlers.
         */
        inputProps: Record<string, any>;
    }): VNode[];
    /**
     * Custom content rendered below the item list.
     * @param {Object} scope - footer slot's params.
     */
    footer(scope: {
        /**
         * Currently filtered items.
         */
        items: CommandMenuItem[];
    }): VNode[];
    /**
     * Custom item rendering (forwarded to Menu's `#item` slot).
     */
    item(scope: {
        /**
         * The item being rendered.
         */
        item: CommandMenuItem;
        /**
         * Action props provided by Menu for the item's anchor element.
         */
        props: Record<string, any>;
        /**
         * Resolved item label.
         */
        label: string;
    }): VNode[];
    /**
     * Custom submenu label rendering (forwarded to Menu's `#submenulabel` slot).
     */
    submenulabel(scope: {
        /**
         * The group item being rendered.
         */
        item: CommandMenuItem;
    }): VNode[];
    /**
     * Content shown when `model` is empty.
     */
    empty(): VNode[];
    /**
     * Content shown when the filtered result is empty.
     */
    emptyfilter(): VNode[];
}

/**
 * Defines valid emits in CommandMenu component.
 */
export interface CommandMenuEmitsOptions {
    /**
     * Emitted when the search string changes.
     * @param value - New search string.
     */
    'update:search'(value: string): void;
    /**
     * Emitted when an item is activated via Enter or click.
     * @param event - Select event payload.
     */
    select(event: CommandMenuSelectEvent): void;
}

export declare type CommandMenuEmits = EmitFn<CommandMenuEmitsOptions>;

/**
 * **PrimeVue - CommandMenu**
 *
 * _A searchable command palette built on top of Menu._
 *
 * [Live Demo](https://www.primevue.dev/commandmenu/)
 * --- ---
 * ![PrimeVue](https://primefaces.org/cdn/primevue/images/logo-100.png)
 *
 * @group Component
 *
 */
declare const CommandMenu: DefineComponent<CommandMenuProps, CommandMenuSlots, CommandMenuEmits>;

declare module 'vue' {
    export interface GlobalComponents {
        CommandMenu: DefineComponent<CommandMenuProps, CommandMenuSlots, CommandMenuEmits>;
    }
}

export default CommandMenu;