export type LlmProviderKind = "mock" | "openai";

export type LlmConfig = {
  provider: LlmProviderKind;
  baseUrl: string | null;
  apiKey: string | null;
  model: string;
};

export function getLlmConfig(): LlmConfig {
  const providerEnv = process.env.LLM_PROVIDER?.trim().toLowerCase();
  const baseUrl = process.env.LLM_BASE_URL?.trim() || null;
  const apiKey = process.env.LLM_API_KEY?.trim() || null;
  const model = process.env.LLM_MODEL?.trim() || "llama3.2";

  if (providerEnv === "mock") {
    return { provider: "mock", baseUrl: null, apiKey: null, model };
  }

  if (!baseUrl) {
    return { provider: "mock", baseUrl: null, apiKey: null, model };
  }

  return { provider: "openai", baseUrl, apiKey, model };
}

export function isLlmConfigured(): boolean {
  const config = getLlmConfig();
  return config.provider === "openai" && Boolean(config.baseUrl);
}