// config_manager.cc (修改后)
#include "config_manager.h"
#include <fstream>

ConfigManager &ConfigManager::getInstance() {
  static ConfigManager instance;
  return instance;
}

json ConfigManager::createDefaultConfig() {
  // --- 修改: 添加新的 video_service 和 video_streams 默认值 ---
  return json{
      {"device_id", "default-edge-proxy-01"},
      {"config_base_path", "/app/config/"},
      {"mqtt_broker", "tcp://localhost:1883"},
      {"mqtt_client_id_prefix", "edge-proxy-"},
      {"data_storage_db_path", "edge_proxy_data.db"},
      {"data_cache_db_path", "edge_data_cache.db"},
      {"tcp_server_ports", {12345}},
      {"web_server_port", 8080},
      {"log_level", "debug"},
      {"alarm_rules_path", "alarms.json"},
      {"piper_executable_path", "/usr/bin/piper"},
      {"piper_model_path", "/app/models/model.onnx"},

      // --- 新增: 视频服务配置 ---
      {"video_config_path", "/app/config/video_config.json"},
  };
}

bool ConfigManager::save_unlocked() {
  std::ofstream ofs(m_configFilePath);
  if (!ofs.is_open()) {
    spdlog::error("Failed to open config file '{}' for writing.",
                  m_configFilePath);
    return false;
  }
  try {
    ofs << m_config_json.dump(4);
    return true;
  } catch (const json::exception &e) {
    spdlog::error("Failed to serialize config. Error: {}", e.what());
    return false;
  }
}

bool ConfigManager::load(const std::string &configFilePath) {
  std::unique_lock<std::shared_mutex> lock(m_mutex);
  m_configFilePath = configFilePath;

  std::ifstream ifs(m_configFilePath);
  if (!ifs.is_open()) {
    spdlog::warn("Config file '{}' not found. Creating with default values.",
                 m_configFilePath);
    m_config_json = createDefaultConfig();
    if (save_unlocked()) {
      spdlog::info("Default config file created at '{}'.", m_configFilePath);
      return true;
    } else {
      spdlog::error("Failed to create default config file.");
      return false;
    }
  }

  try {
    ifs >> m_config_json;
    // **重要**：合并默认值。
    json defaults = createDefaultConfig();
    defaults.merge_patch(
        m_config_json);       // <-- 关键: m_config_json 会覆盖 defaults
    m_config_json = defaults; // 将合并后的结果存回

    spdlog::info("Successfully loaded config from '{}'. Device ID: {}",
                 m_configFilePath, m_config_json.value("device_id", "N/A"));

    if (save_unlocked()) {
      spdlog::debug("Config file updated with new default keys if any.");
    }
    return true;
  } catch (const json::exception &e) {
    spdlog::error(
        "Failed to parse config file '{}'. Error: {}. Using default values.",
        m_configFilePath, e.what());
    m_config_json = createDefaultConfig();
    return false;
  }
}

// ... (save, getDeviceID, ... getPiperModelPath 保持不变) ...
bool ConfigManager::save() {
  std::unique_lock<std::shared_mutex> lock(m_mutex);
  return save_unlocked();
}
std::string ConfigManager::getDeviceID() {
  return get<std::string>("device_id", "default-edge-proxy-01");
}
std::string ConfigManager::getConfigBasePath() {
  return get<std::string>("config_base_path", "/app/config/");
}
std::string ConfigManager::getMqttBroker() {
  return get<std::string>("mqtt_broker", "tcp://localhost:1883");
}
std::string ConfigManager::getMqttClientID() {
  return get<std::string>("mqtt_client_id_prefix", "edge-proxy-") +
         getDeviceID();
}
std::string ConfigManager::getDataStorageDbPath() {
  return getConfigBasePath() +
         get<std::string>("data_storage_db_path", "edge_proxy_data.db");
}
std::string ConfigManager::getDataCacheDbPath() {
  return getConfigBasePath() +
         get<std::string>("data_cache_db_path", "edge_data_cache.db");
}
std::string ConfigManager::getDevicesConfigPath() {
  return getConfigBasePath() + "devices.json";
}
int ConfigManager::getWebServerPort() {
  return get<int>("web_server_port", 8080);
}
std::vector<uint16_t> ConfigManager::getTcpServerPorts() {
  return get<std::vector<uint16_t>>("tcp_server_ports", {12345});
}
std::string ConfigManager::getLogLevel() {
  return get<std::string>("log_level", "debug");
}
std::string ConfigManager::getAlarmRulesPath() {
  return getConfigBasePath() +
         get<std::string>("alarm_rules_path", "alarms.json");
}
std::string ConfigManager::getPiperExecutablePath() {
  return get<std::string>("piper_executable_path", "/usr/bin/piper");
}
std::string ConfigManager::getPiperModelPath() {
  return get<std::string>("piper_model_path", "/app/models/model.onnx");
}

std::string ConfigManager::getVideoConfigPath() {
  return getConfigBasePath() +
         get<std::string>("video_config_path", "video_config.json");
}

std::string ConfigManager::getConfigFilePath() const {
  std::shared_lock<std::shared_mutex> lock(m_mutex);
  return m_configFilePath;
}