const parseInteger = (value: string | undefined, fallback: number) => {
  if (!value) return fallback;
  const parsed = Number.parseInt(value, 10);
  return Number.isFinite(parsed) ? parsed : fallback;
};

const parseBoolean = (value: string | undefined, fallback: boolean) => {
  if (value == null || value === "") return fallback;
  return value === "1" || value.toLowerCase() === "true";
};

export const ENV = {
  appId: process.env.VITE_APP_ID ?? "",
  cookieSecret: process.env.JWT_SECRET ?? "",
  databaseUrl: process.env.DATABASE_URL ?? "",
  oAuthServerUrl: process.env.OAUTH_SERVER_URL ?? "",
  ownerOpenId: process.env.OWNER_OPEN_ID ?? "",
  isProduction: process.env.NODE_ENV === "production",
  forgeApiUrl: process.env.BUILT_IN_FORGE_API_URL ?? "",
  forgeApiKey: process.env.BUILT_IN_FORGE_API_KEY ?? "",
  llmApiUrl:
    process.env.LLM_API_URL ??
    (process.env.BUILT_IN_FORGE_API_URL
      ? `${process.env.BUILT_IN_FORGE_API_URL.replace(/\/$/, "")}/v1/chat/completions`
      : ""),
  llmApiKey:
    process.env.LLM_API_KEY ?? process.env.BUILT_IN_FORGE_API_KEY ?? "",
  llmModel: process.env.LLM_MODEL ?? "gemini-2.5-flash",
  llmMaxTokens: parseInteger(process.env.LLM_MAX_TOKENS, 32768),
  llmEnableThinking: parseBoolean(process.env.LLM_ENABLE_THINKING, false),
  llmThinkingBudget: parseInteger(process.env.LLM_THINKING_BUDGET, 128),
};