#ifndef HELPERS_H_
#define HELPERS_H_

#include <iostream>
#include <string>

#include <stdint.h>

#include "json.hpp"


// Reads configuration json from supplied filename
// cfg - output json
// filename - filepath from which to read json
// log - ostream to log human readable errors to - can be nullptr
// Returns - true if read and parse is successful
bool read_config_json(nlohmann::json& cfg, const std::string& filename, std::ostream* log);

// Reads configuration json from supplied istream
// cfg - output json
// in - istream from which to read json
// log - ostream to log human readable errors to - can be nullptr
// Returns - true if read and parse is successful
bool read_config_json(nlohmann::json& cfg, std::istream& in, std::ostream* log);

// JSON Extraction Helpers
// out value is modified only if an extraction happened
// Returns - whether an extraction happened
bool json_extract(const nlohmann::json& j, const std::string& key, std::string& out);
bool json_extract(const nlohmann::json& j, const std::string& key, int& out);
bool json_extract(const nlohmann::json& j, const std::string& key, bool& out);
bool json_extract(const nlohmann::json& j, const std::string& key, uint16_t& out);

#endif // HELPERS_H_