import { createRequire } from "node:module";

const packageJson = parsePackageJson(createRequire(import.meta.url)("../package.json"));

export const PROVIDER_ID = "explabs";
export const PROVIDER_NAME = "Experiential Labs";
export const DEFAULT_API_BASE_URL = "https://api.experientiallabs.ai/v1";
export const API_KEY_ENV = "EXPLABS_API_KEY";
export const BASE_URL_ENV = "EXPLABS_BASE_URL";
export const API = "openai-responses" as const;
export const USER_AGENT = `${packageJson.name.split("/").at(-1) ?? packageJson.name}/${packageJson.version}`;

export const CATALOG_PAGE_SIZE = 200;
export const CATALOG_MAX_PAGES = 50;
export const MODEL_FETCH_TIMEOUT_MS = 30_000;

export const DEFAULT_CONTEXT_WINDOW = 128_000;
export const DEFAULT_MAX_TOKENS = 16_384;

function parsePackageJson(payload: unknown): { name: string; version: string } {
	if (!payload || typeof payload !== "object" || Array.isArray(payload)) {
		throw new Error("package.json must contain a JSON object");
	}
	const record = payload as Record<string, unknown>;
	const name = record.name;
	const version = record.version;
	if (typeof name !== "string" || !name.trim()) {
		throw new Error("package.json must contain a name");
	}
	if (typeof version !== "string" || !version.trim()) {
		throw new Error("package.json must contain a version");
	}
	return { name, version };
}