import type { JSX, ValidComponent } from "@solidjs/web";
import { dynamic } from "@solidjs/web";
import { omit } from "solid-js";
import { mergeRootProps } from "../../internals/merge-root-props";
import { resolveClassStyle } from "../../internals/resolve-class-style";
import type { BaseUIComponentProps } from "../../internals/types";
import { valueToPercent } from "../../internals/value-to-percent";
import { useMeterRootContext } from "../meter-root-context.ts";
import type { MeterRootState } from "../root/meter-root.tsx";

export interface MeterIndicatorState extends MeterRootState {}

export interface MeterIndicatorProps
	extends BaseUIComponentProps<"div", MeterIndicatorState> {
	/** Tag/component to render. Defaults to `"div"`. */
	as?: ValidComponent;
}

/**
 * Visualizes the position of the value along the range. Renders a `<div>`
 * (or `as` override).
 *
 * §1 wave 2: replaces `renderElement` with a `dynamic()` element. Sizing style is a
 * reactive getter on the internal slot bag.
 */
export function MeterIndicator(props: MeterIndicatorProps): JSX.Element {
	const context = useMeterRootContext();

	const style = (): JSX.CSSProperties => {
		const pct = valueToPercent(context.value(), context.min(), context.max());
		return {
			"inset-inline-start": 0,
			height: "inherit",
			width: `${pct}%`,
		};
	};

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

	const internalSlot = {
		get style(): JSX.CSSProperties {
			return style();
		},
	};

	let merged = mergeRootProps(internalSlot, userClassStyle);
	merged = mergeRootProps(merged, userProps);

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