import { resolveImagerBase } from "@/lib/imager";

/** Build a Habbo avatar-imager URL for a figure string. */
export function avatarImageUrl(
	base: string,
	look: string,
	opts: { size?: "s" | "m" | "l"; headOnly?: boolean; direction?: number; headDirection?: number } = {},
): string {
	const resolved = resolveImagerBase(base);
	const params = new URLSearchParams({ figure: look, img_format: "png" });
	if (opts.size) params.set("size", opts.size);
	if (opts.headOnly) params.set("headonly", "1");
	if (opts.direction !== undefined)
		params.set("direction", String(opts.direction));
	if (opts.headDirection !== undefined)
		params.set("head_direction", String(opts.headDirection));
	const sep = resolved.includes("?") ? "&" : "?";
	return `${resolved}${sep}${params.toString()}`;
}

/** URL-safe slug from a title (lowercase, ascii, hyphenated). */
export function slugify(input: string): string {
	// NFKD splits accented letters into base + combining mark; the combining
	// marks (and any other non-alphanumerics) are then collapsed to hyphens.
	const slug = input
		.toLowerCase()
		.normalize("NFKD")
		.replace(/[^a-z0-9]+/g, "-")
		.replace(/^-+|-+$/g, "")
		.slice(0, 255);
	return slug || "article";
}

/** Trim text to `max` chars on a word boundary, adding an ellipsis. */
export function excerpt(text: string, max = 160): string {
	if (text.length <= max) return text;
	const cut = text.slice(0, max);
	const lastSpace = cut.lastIndexOf(" ");
	return `${(lastSpace > 0 ? cut.slice(0, lastSpace) : cut).trimEnd()}…`;
}