#pragma once

#include <string>
#include <chrono>

namespace scar {

class JWT {
public:
    // Generate JWT token for username with expiration
    static std::string generate(const std::string& username, 
                                const std::string& secret,
                                std::chrono::seconds expiration = std::chrono::hours(24));
    
    // Verify and decode JWT token
    static bool verify(const std::string& token, const std::string& secret);
    
    // Extract username from token (without verification)
    static std::string extractUsername(const std::string& token);
    
    // Check if token is expired
    static bool isExpired(const std::string& token);
    
private:
    static constexpr const char* ISSUER = "scarchat-server";
};

} // namespace scar