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 { usePopoverRootContext } from "../popover-root-context";
import {
	type PopoverAlign,
	type PopoverSide,
	usePopoverPositionerContext,
} from "../positioner/popover-positioner-context";

export interface PopoverArrowState {
	open: boolean;
	side: PopoverSide;
	align: PopoverAlign;
	uncentered: boolean;
}

export interface PopoverArrowProps
	extends BaseUIComponentProps<"div", PopoverArrowState> {
	/**
	 * Tag/component to render. Defaults to `"div"`. Replaces the
	 * pre-spike `render` prop (axis G).
	 */
	as?: ValidComponent;
}

/**
 * Displays an arrow positioned against the popover anchor. Renders a `<div>`.
 */
export function PopoverArrow(props: PopoverArrowProps): JSX.Element {
	const root = usePopoverRootContext();
	const positioner = usePopoverPositionerContext();

	const state = createMemo<PopoverArrowState>(() => ({
		open: root.open(),
		side: positioner.side(),
		align: positioner.align(),
		uncentered: positioner.arrowUncentered(),
	}));

	const setArrowRef = (el: HTMLElement | null): void => {
		positioner.arrowRef.current = el;
	};

	const internal = {
		"aria-hidden": "true",
		get style() {
			return positioner.arrowStyles();
		},
		get "data-open"() {
			return state().open ? "" : undefined;
		},
		get "data-closed"() {
			return state().open ? undefined : "";
		},
		get "data-side"() {
			return state().side;
		},
		get "data-align"() {
			return state().align;
		},
		get "data-uncentered"() {
			return state().uncentered ? "" : 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(setArrowRef, userRef(props))} />;
}