/**
 * Avatar imager helpers.
 *
 * The public-facing imager URL is configured via NEXT_PUBLIC_IMAGER_URL env var.
 * Defaults to epicnabbo.nl imager with effect=14 and img_format=apng.
 */

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

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

const DEFAULT_IMAGER_URL = "https://epicnabbo.nl/imaging/avatarimage";

/**
 * Resolve the public-facing imager base URL from env.
 * Falls back to epicnabbo.nl if not configured.
 */
export function resolveImagerBase(): string {
	const fromEnv = process.env.NEXT_PUBLIC_IMAGER_URL?.trim();
	if (!fromEnv) {
		return DEFAULT_IMAGER_URL;
	}
	return fromEnv.replace(/\/+$/, "");
}

/**
 * Build an avatar image URL using the configured imager.
 * Uses effect=14 and img_format=apng by default for epicnabbo.nl compatibility.
 * Preserves the user's stored figure so the rendered avatar matches the account.
 * Omits default parameters (direction=2, head_direction=3, size=m) for cleaner URLs.
 */
export function getAvatarUrl(
	figure: string,
	options: AvatarOptions = {},
): string {
	const {
		size = "m",
		direction = 2,
		headDirection = 3,
		headOnly = false,
		gesture,
		action,
		effect = 14,
		img_format = "apng",
	} = options;

	const params = new URLSearchParams({
		figure,
		img_format,
		effect: String(effect),
	});

	// Only add non-default params
	if (direction !== 2) params.set("direction", String(direction));
	if (headDirection !== 3) params.set("head_direction", String(headDirection));
	if (size !== "m") params.set("size", size);

	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()}`;
}