/**
 * Avatar imager helpers.
 *
 * The public-facing imager URL resolves to the site's own `/imaging` endpoint
 * by default. That endpoint proxies the image from the configured upstream
 * (defaults to Habbo's public imager).
 */

export type { AvatarOptions } from "@/types/admin";

import type { AvatarOptions } from "@/types/admin";

/** Build an absolute default imager URL from public env vars. */
function defaultImagerUrl(): string {
	const pub = process.env.NEXT_PUBLIC_IMAGER_URL?.trim();
	if (pub && !pub.includes("/api/imaging/avatar")) return pub.replace(/\/+$/, "");
	const app = process.env.NEXT_PUBLIC_APP_URL?.trim();
	if (app) return `${app.replace(/\/+$/, "")}/imaging`;
	return "/imaging";
}

/**
 * Resolve the public-facing imager base URL.
 * Rejects the broken self-hosted proxy route if stored in settings.
 */
export function resolveImagerBase(configured?: string | null): string {
	const fromEnv = process.env.NEXT_PUBLIC_IMAGER_URL?.trim();
	if (fromEnv && !fromEnv.includes("/api/imaging/avatar")) {
		return fromEnv.replace(/\/+$/, "");
	}

	const v = (configured ?? "").trim();
	if (!v || v.includes("/api/imaging/avatar")) {
		return defaultImagerUrl();
	}
	return v.replace(/\/+$/, "");
}

/**
 * Resolve the upstream URL used by the proxy endpoint.
 * Falls back to Habbo's public imager when nothing else is configured.
 */
export function resolveUpstreamBase(): string {
	const fromEnv = process.env.IMAGING_UPSTREAM_URL?.trim();
	if (fromEnv) return fromEnv.replace(/\/+$/, "");
	return "https://www.habbo.com/habbo-imaging/avatarimage";
}

/**
 * Build an avatar image URL (site's own `/imaging` endpoint by default).
 *
 * @example
 * getAvatarUrl('hr-893-45.hd-180-1.ch-210-66.lg-270-82')
 * getAvatarUrl(look, { size: 'l', headOnly: true })
 * getAvatarUrl(look, { size: 'm', gesture: 'sml', direction: 2 })
 */
export function getAvatarUrl(
	figure: string,
	options: AvatarOptions = {},
): string {
	const {
		size = "m",
		direction = 2,
		headDirection = 3,
		headOnly = false,
		gesture,
		action,
	} = options;

	const params = new URLSearchParams({
		figure,
		direction: String(direction),
		head_direction: String(headDirection),
		size,
		img_format: "png",
	});

	if (headOnly) params.set("headonly", "1");
	if (gesture) params.set("gesture", gesture);
	if (action) params.set("action", action);

	const base = resolveImagerBase();
	return `${base}?${params.toString()}`;
}