import type { JSX, ValidComponent } from "@solidjs/web";
/**
 * `<Autocomplete.InputGroup>` — a wrapper for the input and its associated
 * controls.
 */

import { dynamic } from "@solidjs/web";
import { createMemo, omit } from "solid-js";
import type { ComboboxSide } from "../../combobox/positioner/positioner-context";
import { useComboboxRootContext } from "../../combobox/root/combobox-root-context";
import { composeRefs, userRef } from "../../internals/compose-refs";
import { mergeRootProps } from "../../internals/merge-root-props";
import { resolveClassStyle } from "../../internals/resolve-class-style";
import type { BaseUIComponentProps } from "../../internals/types";

export interface AutocompleteInputGroupState {
	open: boolean;
	disabled: boolean;
	readOnly: boolean;
	popupSide: ComboboxSide | null;
	listEmpty: boolean;
}

export interface AutocompleteInputGroupProps
	extends BaseUIComponentProps<"div", AutocompleteInputGroupState> {
	as?: ValidComponent;
}

/**
 * A wrapper for the input and its associated controls.
 * Renders a `<div>` element.
 */
export function AutocompleteInputGroup(
	props: AutocompleteInputGroupProps,
): JSX.Element {
	const root = useComboboxRootContext();

	const listEmpty = createMemo<boolean>(
		() => root.flatFilteredItems().length === 0,
	);

	const state = createMemo<AutocompleteInputGroupState>(() => ({
		open: root.open(),
		disabled: root.disabled(),
		readOnly: root.readOnly(),
		popupSide: root.popupSide(),
		listEmpty: listEmpty(),
	}));

	function onMouseDown(event: MouseEvent): void {
		const target = event.target as HTMLElement | null;
		if (target && target !== root.inputRef.current) {
			root.inputRef.current?.focus();
		}
	}

	const internal = {
		role: "group" as const,
		onMouseDown,
		// inputGroupStateAttributesMapping projection.
		get "data-popup-open"() {
			return state().open ? "" : undefined;
		},
		get "data-disabled"() {
			return state().disabled ? "" : undefined;
		},
		get "data-readonly"() {
			return state().readOnly ? "" : undefined;
		},
		get "data-list-empty"() {
			return state().listEmpty ? "" : undefined;
		},
		get "data-popup-side"() {
			return state().popupSide ?? undefined;
		},
	};

	const userClassStyle = resolveClassStyle(props, () => state());
	const userProps = omit(props, "as", "class", "style", "attrs");

	let merged: Record<string, unknown> = mergeRootProps(
		internal,
		userClassStyle,
	);
	merged = mergeRootProps(merged, userProps);

	const Tag = dynamic(() => props.as ?? "div");
	return <Tag {...merged} ref={composeRefs(userRef(props))} />;
}