#ifndef slic3r_UserAccountCommunication_hpp_
#define slic3r_UserAccountCommunication_hpp_

#include "UserAccountSession.hpp"
#include "Event.hpp"
#include "libslic3r/AppConfig.hpp"

#include <queue>
#include <condition_variable>
#include <map>
#include <thread>
#include <mutex>
#include <memory>

namespace Slic3r {
namespace GUI {
class CodeChalengeGenerator
{
public:
    CodeChalengeGenerator() {}
    ~CodeChalengeGenerator() {}
    std::string generate_chalenge(const std::string& verifier);
    std::string generate_verifier();
private:
    std::string generate_code_verifier(size_t length);
    std::string base64_encode(const std::string& input);
    std::string sha256(const std::string& input);
};

class UserAccountCommunication {
public:
    UserAccountCommunication(wxEvtHandler* evt_handler, AppConfig* app_config);
    ~UserAccountCommunication();

    // UI Session thread Interface 
    //
    bool is_logged();
    void do_login();
    void do_logout();
    void do_clear();
    // Trigger function starts various remote operations
    void enqueue_connect_status_action();
    void enqueue_connect_printer_models_action();
    void enqueue_avatar_action(const std::string& url);
    void enqueue_test_connection();

    // Callbacks - called from UI after receiving Event from Session thread. Some might use Session thread.
    // 
    // Called when browser returns code via prusaslicer:// custom url.
    // Exchanges code for tokens and shared_session_key
    void on_login_code_recieved(const std::string& url_message);


    void set_username(const std::string& username);
    void set_remember_session(bool b);
    bool get_remember_session() const {return m_remember_session; }

    std::string get_username() const { return m_username; }
    std::string get_access_token();
    std::string get_shared_session_key();

    void set_polling_enabled(bool enabled);

private:
    std::unique_ptr<UserAccountSession>     m_session;
    std::thread                             m_thread;
    std::mutex                              m_session_mutex;
    std::mutex                              m_thread_stop_mutex;
    std::condition_variable                 m_thread_stop_condition;
    bool                                    m_thread_stop { false };
    bool                                    m_thread_wakeup{ false };
    std::string                             m_code_verifier;
    wxEvtHandler*                           m_evt_handler;
    AppConfig*                              m_app_config;
    // if not empty - user is logged in
    std::string                             m_username;
    bool                                    m_remember_session { true }; // if default is true, on every login Remember me will be checked.

    void wakeup_session_thread();
    void init_session_thread();
    void login_redirect();
    std::string client_id() const { return "oamhmhZez7opFosnwzElIgE2oGgI2iJORSkw587O"; }
    
    
    
};
}
}
#endif