import OpenAI from "openai";

let client: OpenAI | null = null;

/** Lazily-constructed OpenAI client (used for GPT-4 scripts and DALL·E art). */
export function openai(): OpenAI {
  if (!client) {
    const apiKey = process.env.OPENAI_API_KEY;
    if (!apiKey) throw new Error("OPENAI_API_KEY is not set");
    client = new OpenAI({ apiKey });
  }
  return client;
}

export const SCRIPT_MODEL = process.env.OPENAI_SCRIPT_MODEL ?? "gpt-4o";
export const ART_MODEL = process.env.OPENAI_ART_MODEL ?? "dall-e-3";