import { env as cloudflareEnv } from "cloudflare:workers";
import type { Bindings } from "hono/types";

type EnvVariable = keyof Cloudflare.Env;
const defaultValues: Record<EnvVariable, any> = {
  ENABLE_ANIFY: true,
};

export function readEnvVariable<T>(
  envVariable: EnvVariable,
  env: Bindings | undefined = cloudflareEnv,
): T {
  try {
    return JSON.parse(env?.[envVariable] ?? null) ?? defaultValues[envVariable];
  } catch (error) {
    if (error instanceof SyntaxError) {
      return env![envVariable];
    }

    throw error;
  }
}