import type { JSX, ValidComponent } from "@solidjs/web";
/**
 * `<Drawer.Indent>` — wrapper for the app's main UI that applies
 * `data-active` when any drawer within the nearest `<Drawer.Provider>` is
 * open.
 */

import { dynamic } from "@solidjs/web";
import { createMemo, omit, onCleanup } 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 { useIsoLayoutEffect } from "../../internals/use-iso-layout-effect";
import { DrawerBackdropCssVars } from "../backdrop/drawer-backdrop-css-vars";
import { DrawerPopupCssVars } from "../popup/drawer-popup-css-vars";
import { useDrawerProviderContext } from "../provider/drawer-provider-context";

export interface DrawerIndentState {
	active: boolean;
}

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

/**
 * App-shell wrapper that keys off drawer activity. Renders a `<div>`.
 */
export function DrawerIndent(props: DrawerIndentProps): JSX.Element {
	const providerContext = useDrawerProviderContext(true);

	const state = createMemo<DrawerIndentState>(() => ({
		active: providerContext?.active() ?? false,
	}));

	let indentEl: HTMLDivElement | null = null;
	const setIndentRef = (el: HTMLDivElement | null): void => {
		indentEl = el;
	};

	useIsoLayoutEffect(
		() => providerContext?.visualStateStore,
		(visualStateStore) => {
			const el = indentEl;
			if (!el || !visualStateStore) return undefined;

			const syncVisualState = (): void => {
				const { swipeProgress, frontmostHeight } =
					visualStateStore.getSnapshot();
				if (swipeProgress <= 0) {
					el.style.setProperty(DrawerBackdropCssVars.swipeProgress, "0");
				} else {
					el.style.setProperty(
						DrawerBackdropCssVars.swipeProgress,
						`${swipeProgress}`,
					);
				}
				if (frontmostHeight <= 0) {
					el.style.removeProperty(DrawerPopupCssVars.height);
				} else {
					el.style.setProperty(
						DrawerPopupCssVars.height,
						`${frontmostHeight}px`,
					);
				}
			};

			syncVisualState();
			const unsubscribe = visualStateStore.subscribe(syncVisualState);
			return () => {
				unsubscribe();
				el.style.setProperty(DrawerBackdropCssVars.swipeProgress, "0");
				el.style.removeProperty(DrawerPopupCssVars.height);
			};
		},
	);

	onCleanup(() => {
		indentEl = null;
	});

	const internal = {
		get style(): JSX.CSSProperties {
			return {
				[DrawerBackdropCssVars.swipeProgress]: "0",
			} as JSX.CSSProperties;
		},
		get "data-active"() {
			return state().active ? "" : undefined;
		},
		get "data-inactive"() {
			return state().active ? 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(setIndentRef, userRef(props))} />;
}