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

export interface ProgressIndicatorState extends ProgressRootState {}

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

/**
 * Visualizes the completion status of the task. Renders a `<div>` (or `as`
 * override).
 */
export function ProgressIndicator(props: ProgressIndicatorProps): JSX.Element {
	const context = useProgressRootContext();

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

	// Resolve `class`/`style` so function values (stateful styling) are invoked
	// with the progress state instead of being spread to the DOM raw. The
	// internal `style` (the indicator width) is merged first below, so a
	// user-supplied style composes with it rather than replacing the width.
	const userClassStyle = resolveClassStyle(props, () => ({
		status: context.status(),
	}));
	const userProps = omit(props, "as", "class", "style", "attrs");

	const internalSlot = {
		get style(): JSX.CSSProperties | undefined {
			return style();
		},
		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 ?? "div");
	return <Tag {...merged} />;
}