#pragma once

#include <string>
#include <unordered_map>
#include <vector>
#include <optional>
#include <chrono>

class Utils {
public:
    // Safe conversions with fallback
    static int optionalStoiOrDefault(const std::unordered_map<std::string, std::string>& row,
                                     const std::string& key, int def = -1);
    static double optionalStodOrDefault(const std::unordered_map<std::string, std::string>& row,
                                        const std::string& key, double def = 0.0);

    static bool isNullOrEmpty(const std::string& s);

    // Parse timestamp from common ISO / SQL formats into time_point
    static std::optional<std::chrono::system_clock::time_point> parseTimestamp(const std::string& iso);

    // Compute full years age from birthdate string; returns nullopt on parse failure.
    static std::optional<int> computeAgeYears(const std::string& birthdate_iso);

    // Build Postgres integer array literal "{1,2,3}"
    static std::string buildPgIntArrayLiteral(const std::vector<int>& elems);

    // Safely parse a nullable integer-like string
    static std::optional<int> optionalUid(const std::string& val);
};