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 {
	type ProgressRootState,
	useProgressRootContext,
} from "../progress-root-context.ts";

export interface ProgressValueState extends ProgressRootState {}

export type ProgressValueChildren =
	| JSX.Element
	| ((formattedValue: string | null, value: number | null) => JSX.Element);

export interface ProgressValueProps
	extends Omit<BaseUIComponentProps<"span", ProgressValueState>, "children"> {
	/**
	 * Tag/component to render. Defaults to `"span"`. Replaces the
	 * pre-spike `render` prop (axis G).
	 */
	as?: ValidComponent;
	children?: ProgressValueChildren | undefined;
}

/**
 * A text label displaying the current value. Renders a `<span>` (or `as`
 * override).
 */
export function ProgressValue(props: ProgressValueProps): JSX.Element {
	const context = useProgressRootContext();

	const content = (): JSX.Element => {
		const value = context.value();
		const formattedValue = context.formattedValue();
		const child = props.children;
		if (typeof child === "function") {
			const arg = value == null ? "indeterminate" : formattedValue;
			return child(arg, value);
		}
		if (child !== undefined) return child;
		return value == null ? null : formattedValue;
	};

	// Resolve `class`/`style` so function values (stateful styling) are invoked
	// with the progress state instead of being spread to the DOM raw.
	const userClassStyle = resolveClassStyle(props, () => ({
		status: context.status(),
	}));
	const userProps = omit(props, "as", "children", "class", "style", "attrs");

	const internalSlot = {
		"aria-hidden": true,
		get children(): JSX.Element {
			return content();
		},
		get "data-indeterminate"(): "" | undefined {
			return context.status() === "indeterminate" ? "" : undefined;
		},
		get "data-progressing"(): "" | undefined {
			return context.status() === "progressing" ? "" : undefined;
		},
		get "data-complete"(): "" | undefined {
			return context.status() === "complete" ? "" : undefined;
		},
	};

	let merged: Record<string, unknown> = mergeRootProps(
		internalSlot,
		userClassStyle,
	);
	merged = mergeRootProps(merged, userProps);

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