import type { JSX, ValidComponent } from "@solidjs/web";
import { dynamic } from "@solidjs/web";
import { createMemo, omit } from "solid-js";
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";
import type { TransitionStatus } from "../../internals/use-transition-status/use-transition-status";
import { useComboboxRootContext } from "../root/combobox-root-context";

export interface ComboboxBackdropState {
	open: boolean;
	transitionStatus: TransitionStatus;
}

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

/**
 * An overlay displayed beneath the popup. Renders a `<div>` element.
 */
export function ComboboxBackdrop(props: ComboboxBackdropProps): JSX.Element {
	const root = useComboboxRootContext();

	const state = createMemo<ComboboxBackdropState>(() => ({
		open: root.open(),
		transitionStatus: root.transitionStatus(),
	}));

	const internal = {
		role: "presentation" as const,
		get hidden() {
			return !root.mounted();
		},
		style: {
			"user-select": "none",
			"-webkit-user-select": "none",
		} as JSX.CSSProperties,
		get "data-open"() {
			return state().open ? "" : undefined;
		},
		get "data-closed"() {
			return state().open ? undefined : "";
		},
		get "data-starting-style"() {
			return state().transitionStatus === "starting" ? "" : undefined;
		},
		get "data-ending-style"() {
			return state().transitionStatus === "ending" ? "" : 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))} />;
}