Method DownloadModel

apps/mnncli/src/model_manager.cpp:136–313

}

int ModelManager::DownloadModel(const std::string &model_name, bool verbose,
                                const std::string &cache_dir_override) {
  if (model_name.empty()) {
    mnncli::UserInterface::ShowError("Model name is required",
                                     "Usage: mnncli model download <name>");
    return 1;
  }

  LOG_INFO("Downloading model: " + model_name);

  // Get current configuration
  auto &config_mgr = ConfigManager::GetInstance();
  auto config = config_mgr.LoadConfig();

  // Show which download provider will be used
  LOG_INFO("Using download provider: " + config.download_provider);

  // Early validation for obviously invalid model names
  if (!IsValidModelName(model_name)) {
    mnncli::UserInterface::ShowError("Invalid model name format: '" +
                                     model_name + "'");
    std::cout << "\n💡 Valid model name formats:\n";
    std::cout
        << "  • Simple name (e.g., 'qwen-7b') - will search in repository\n";
    std::cout << "  • Full ID (e.g., 'Qwen/Qwen-7B-Chat') - direct download\n";
    std::cout << "  • Prefixed ID (e.g., 'hf:Qwen/Qwen-7B-Chat') - specify "
                 "provider\n";
    std::cout << "\n💡 Try:\n";
    std::cout << "  • Use 'mnncli search " << model_name
              << "' to find available models\n";
    std::cout << "  • Use 'mnncli list' to see downloaded models\n";
    return 1;
  }

  try {
    // Get cache directory from override, config, or use default
    std::string cache_dir;
    if (!cache_dir_override.empty()) {
      cache_dir = cache_dir_override;
    } else {
      cache_dir = config.cache_dir;
      if (cache_dir.empty()) {
        cache_dir = config_mgr.GetBaseCacheDir();
      }
    }

    // Create download manager instance
    auto &download_manager =
        mnncli::ModelDownloadManager::GetInstance(cache_dir);

    // Create CLI download listener for user feedback
    CLIDownloadListener cli_listener;
    download_manager.AddListener(&cli_listener);

    // Use ModelRepository to get the correct model ID for download
    std::string model_id;
    std::string source = config.download_provider;