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 PreviewCardAlign,
	type PreviewCardSide,
	usePreviewCardPositionerContext,
} from "../preview-card-positioner-context";
import { usePreviewCardRootContext } from "../preview-card-root-context";

export interface PreviewCardArrowState {
	open: boolean;
	side: PreviewCardSide;
	align: PreviewCardAlign;
	uncentered: boolean;
	anchorHidden: boolean;
}

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

/**
 * Displays an element positioned against the preview card anchor. Renders a
 * `<div>` element. Mirrors Base UI React's `<PreviewCard.Arrow>`.
 *
 * Solid 2.0-native rewire (§1 wave 2): replaces `renderElement` with
 * `dynamic(() => props.as ?? "div")` and inlines state-attr
 * getters via `mergeRootProps`.
 */
export function PreviewCardArrow(props: PreviewCardArrowProps): JSX.Element {
	const root = usePreviewCardRootContext();
	const positioner = usePreviewCardPositionerContext();

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

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

	const internal = {
		"aria-hidden": true,
		get style() {
			return positioner.arrowStyles() as JSX.CSSProperties;
		},
		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;
		},
		get "data-anchor-hidden"() {
			return state().anchorHidden ? "" : 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(arrowRefCallback, userRef(props))} />
	);
}