#pragma once

class Bus;

#include <cstdint>
#include <memory>
#include <atomic>
#include <vector>

#include "CPU.h"

enum class SystemStatus {
  STOPPED,
  RUNNING,
  EXCEPTION
};

class Userspace {
 public:
  Userspace();
  ~Userspace() = default;

  void Upload2Memory(uint8_t bytes[], size_t len);
  uint8_t* RetrieveMemory();
  
  void Run();
  void Start();
  void Stop();
  void Step();
  void Reset();
  void Exit();

  SystemStatus GetSystemStatus();
  CPUStatus GetCPUStatus();
  std::vector<std::string>& GetException();
    
 private:
  std::shared_ptr<RAM> m_RAM;
  std::shared_ptr<Bus> m_Bus;
  CPU m_CPU;
  std::atomic<SystemStatus> m_Status = SystemStatus::STOPPED;
  std::atomic<bool> m_ApplicationRunning = false;

  std::vector<std::string> m_ExceptionMessages;
  
  std::shared_ptr<RAM> m_ProgramMemory;
  size_t m_ProgramMemoryLen;

 private:
  void StepCPU();
  void EmulatorLoop();
};