/** @file Serialize json module. */
import { normalizeWhitespace } from "./text.ts";

export function stableJson(value: unknown): string {
	return JSON.stringify(sortValue(value), null, 2);
}

export function toLlmText(input: {
	title?: string;
	description?: string;
	text?: string;
	markdown?: string;
	metadata?: Record<string, unknown>;
}): string {
	const parts = [
		input.title ? `# ${input.title}` : undefined,
		input.description,
		input.markdown ?? input.text,
		input.metadata && Object.keys(input.metadata).length > 0
			? `Metadata:\n${stableJson(input.metadata)}`
			: undefined,
	];
	return normalizeWhitespace(parts.filter(Boolean).join("\n\n"));
}

function sortValue(value: unknown): unknown {
	if (Array.isArray(value)) return value.map((v) => sortValue(v));
	if (!value || typeof value !== "object") return value;
	return Object.fromEntries(
		Object.entries(value as Record<string, unknown>)
			.toSorted(([left], [right]) => left.localeCompare(right))
			.map(([key, entry]) => [key, sortValue(entry)]),
	);
}