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#pragma once
#include <Poco/Util/AbstractConfiguration.h>
#include <queue>
#include <set>
namespace DB
{
using ConfigurationPtr = Poco::AutoPtr<Poco::Util::AbstractConfiguration>;
class SettingsChanges;
namespace NamedCollectionConfiguration
{
ConfigurationPtr createEmptyConfiguration(const std::string & root_name);
bool hasConfigValue(
const Poco::Util::AbstractConfiguration & config,
const std::string & path);
template <typename T> T getConfigValue(
const Poco::Util::AbstractConfiguration & config,
const std::string & path);
template <typename T> T getConfigValueOrDefault(
const Poco::Util::AbstractConfiguration & config,
const std::string & path,
const T * default_value = nullptr);
template<typename T> void setConfigValue(
Poco::Util::AbstractConfiguration & config,
const std::string & path,
const T & value,
bool update = false);
template <typename T> void copyConfigValue(
const Poco::Util::AbstractConfiguration & from_config,
const std::string & from_path,
Poco::Util::AbstractConfiguration & to_config,
const std::string & to_path);
void removeConfigValue(
Poco::Util::AbstractConfiguration & config,
const std::string & path);
ConfigurationPtr createConfiguration(const std::string & root_name, const SettingsChanges & settings);
/// Enumerate keys paths of the config recursively.
/// E.g. if `enumerate_paths` = {"root.key1"} and config like
/// <root>
/// <key0></key0>
/// <key1>
/// <key2></key2>
/// <key3>
/// <key4></key4>
/// </key3>
/// </key1>
/// </root>
/// the `result` will contain: "root.key0", "root.key1.key2" and "root.key1.key3.key4"
///
/// depth == -1 means to return all keys with full path: "root.key0", "root.key1.key2", "root.key1.key3.key4".
/// depth == 0 means: "root.key0" and "root.key1"
/// depth == 1 means: "root.key0", "root.key1.key2" and "root.key1.key3"
/// and so on.
void listKeys(
const Poco::Util::AbstractConfiguration & config,
std::queue<std::string> enumerate_paths,
std::set<std::string, std::less<>> & result,
ssize_t depth);
}
}
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