/**
 * Centralised environment configuration.
 * Preserves existing env variable names and default values.
 */
export const env = {
  get nodeEnv(): string {
    return process.env.NODE_ENV ?? "development";
  },

  get isProduction(): boolean {
    return env.nodeEnv === "production";
  },

  get sessionSecret(): string {
    return process.env.SESSION_SECRET ?? "complex_password_at_least_32_characters_long";
  },

  get authPassword(): string {
    return process.env.AUTH_PASSWORD ?? "adventure";
  },

  get cronSecret(): string {
    return process.env.CRON_SECRET ?? "change-me-cron-secret";
  },

  get ollamaUrl(): string {
    return process.env.OLLAMA_URL ?? "http://localhost:11434";
  },

  get ollamaModelFast(): string {
    return process.env.OLLAMA_MODEL_FAST ?? "llama3.2:3b";
  },

  get ollamaModelProse(): string {
    return process.env.OLLAMA_MODEL_PROSE ?? process.env.OLLAMA_MODEL_FAST ?? "llama3.2:3b";
  },

  get hyperOllamaUrl(): string {
    return process.env.HYPER_OLLAMA_URL ?? "http://192.168.1.50:11434";
  },

  get hyperOllamaModelFast(): string {
    return process.env.HYPER_OLLAMA_MODEL_FAST ?? "llama3.1:8b";
  },

  get hyperOllamaModelProse(): string {
    return (
      process.env.HYPER_OLLAMA_MODEL_PROSE ??
      process.env.HYPER_OLLAMA_MODEL_FAST ??
      "llama3.1:8b"
    );
  },

  get openAiApiKey(): string | undefined {
    return process.env.OPENAI_API_KEY;
  },

  get llamaCppApiKey(): string | undefined {
    return process.env.LLAMACPP_API_KEY;
  },

  get calibreLibraryPath(): string | undefined {
    return process.env.CALIBRE_LIBRARY_PATH;
  },

  get calibreMetadataDbPath(): string | undefined {
    return process.env.CALIBRE_METADATA_DB_PATH;
  },

  get calibreReadOnly(): boolean {
    return process.env.CALIBRE_READ_ONLY !== "false";
  },
} as const;

export function getOpenAiCompatibleApiKey(): string | undefined {
  return env.openAiApiKey ?? env.llamaCppApiKey;
}