/*
	Copyright (c)  2013 IOnU Security Inc. All rights reserved
	Created August 2013 by Kendrick Webster
	
	K2Daemon/global.h - global data and functions and also a catchall for
	globably-useful definitions.
*/
#pragma once

// Compile-time options for debugging/testing
//#define TEST_CHRONO
//#define TEST_MONGODB
#define DEBUG_MONGO_NQUEUE

#ifdef DEBUG_MONGO_NQUEUE
#define dbg_mongo_nqueue(...) logprintf(__VA_ARGS__)
#else
#define dbg_mongo_nqueue(...)
#endif

// global constants
constexpr unsigned int ONE_THOUSAND = 1000;
constexpr unsigned int ONE_MILLION = ONE_THOUSAND * ONE_THOUSAND;
constexpr unsigned int TIMER_TICKS_PER_SECOND = 10;
constexpr unsigned int TIMER_MILLISECONDS = ONE_THOUSAND / TIMER_TICKS_PER_SECOND;
constexpr unsigned int TIMER_MICROSECONDS = ONE_MILLION / TIMER_TICKS_PER_SECOND;
constexpr unsigned int MONGODB_FLUSH_TIME_LIMIT_MILLISECONDS = TIMER_MILLISECONDS / 5; // flush max time per try, 1/5 of a timer tick
constexpr unsigned int MONGODB_RECONNECT_DELAY_MILLISECONDS = 250;

// Common headers
#include <chrono>
//#include "../libionu/libionu.h"
#include "../K2Client/K2IPC.h"
#include "LogTrace.h"
#include "LogMemstats.h"
#include "Hash.h"


// Simple, human-readable return status ...
//
// Instead of passing detailed error codes and information to a caller,
// error details are reported directly to a global log facility, and the
// caller is only told whether an operation succeeded or failed.
//
// The enum below is equivalent to a bool return type, but doesn't burden
// a human reader with needing to know which state (true of false) represents
// a failure or success condition.
enum tag_eSuccessFailureType
{
	SUCCESS,
	FAILURE
};
typedef enum tag_eSuccessFailureType success_t;


// Common function pointer types
typedef void (* vv_callback_t)(void);


// -------------------------- Data and functions --------------------------

// random number source, incrementally seeded by main module
extern sc_hash_state_t rng_hash;

// the UDP socket
extern int sockfd;

// the UDP packet buffer for send
extern uint8_t tx_buf[K2IPC_MAX_PACKET_SIZE];

// the UDP packet buffer for receive
extern uint8_t rx_buf[K2IPC_MAX_PACKET_SIZE];

// the source address of the last received UDP packet
extern struct sockaddr_in recvaddr;

namespace Main
{
	void PollDatabase(void);
}


// -------------------------- Utility classes --------------------------

class CStopWatch
{
protected:
    std::chrono::steady_clock::time_point m_t0;

public:
    CStopWatch()
    : m_t0(std::chrono::steady_clock::now())
    {
    }
    
    ~CStopWatch()
    {
    }
    
    void Reset(void)
    {
        m_t0 = std::chrono::steady_clock::now();
    }

    uint64_t u64_Microseconds(void)
    {
        return std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::steady_clock::now() - m_t0).count();
    }

    unsigned int Microseconds(void)
    {
        return static_cast<unsigned int>(u64_Microseconds());
    }
    
    uint64_t u64_Milliseconds(void)
    {
        return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - m_t0).count();
    }
    
    unsigned int Milliseconds(void)
    {
        return static_cast<unsigned int>(u64_Milliseconds());
    }
    
    void DecreaseMilliseconds(unsigned int n)
    {
        m_t0 += std::chrono::milliseconds(n);
    }
    
    void DecreaseMicroseconds(unsigned int n)
    {
        m_t0 += std::chrono::microseconds(n);
    }
};