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#include <stdio.h>

#include <unistd.h>

#include <time.h>

#include <errno.h>

#include <pthread.h>

#include <sched.h>

//#include <tefses_stats.h>

#include "fsf.h"

#include "timespec_operations.h"

#include "fsf_os_compatibility.h"

/*

 * This is part of the common tests:

 ** Test for the calculus of the jitter

  -  Create a BOUNDED workload server, with 40ms minimum budget and 50ms

     as maximum and minimum period and also 50ms maximum budget,

     preemption level 4 and deadline equal to period. The server is

     bound to the main thread with fsf_negotiate_contract_for_myself.

  -  The test consist of a periodic activation at absolutes points in time,

     the first instruction after each activation is the measurement of the

     absolute real-time of activation. Minimum, maximum and average

     differences are stored. The test runs 500 times.

*/

#define LOCAL_ERROR(nn,ss) {if(errno==0) errno=(nn); perror(ss); return (nn);}

//#define ERROR(nn,ss) {if(errno==0) errno=(nn); perror(ss); exit (nn);}

struct timespec            instant_zero = {0,0};

int                        main_priority = 4;

struct timespec            last_time = {0,0};

fsf_server_id_t            server_A = 0;

extern int cal_cycles;

extern int calibrate_cycle(void);

extern void eat(TIME wait);

int

fsf_priority_map (unsigned long plevel)

{

  return plevel;

}

int main()

{

   struct sched_param   param;

   //struct timespec      half_second={0,500000000};

   struct timespec      tmp = {0,0};

   int                  terror = 0;

  fsf_contract_parameters_t  contract;

  struct timespec    budget_min = {0,30000000};

  struct timespec    period_max = {0,50000000};

  struct timespec    budget_max = {0,50000000};

  struct timespec    period_min = {0,50000000};

  fsf_workload_t     workload = FSF_BOUNDED;

  bool               d_equals_t = true;

  struct timespec    deadline = {0,50000000};

  int                budget_overrun_sig_notify = FSF_NULL_SIGNAL;   // 0

  union sigval       budget_overrun_sig_value = {0};

  int                deadline_miss_sig_notify = FSF_NULL_SIGNAL;    // 0

  union sigval       deadline_miss_sig_value = {0};

  fsf_granularity_t      granularity = FSF_DEFAULT_GRANULARITY;       // CONTINUOUS

  fsf_utilization_set_t *utilization_set = FSF_NULL_UTILIZATION_SET;  // NULL

  int                    quality = 1;

  int                    importance = FSF_DEFAULT_IMPORTANCE;         // 1

  fsf_preemption_level_t   preemption_level = (fsf_preemption_level_t) main_priority;

  fsf_critical_sections_t *critical_sections = NULL;

  struct timespec  max_jitter={0,0};

  struct timespec  min_jitter={100000000,0};

  struct timespec  avg_jitter={0,0};

  int              my_counter = 0;

/*

  struct timespec  next_budget;

  struct timespec  next_period;

  bool             was_deadline_missed = 0;

  bool             was_budget_overran = 0;

*/

  //pthread_t                task_in_b;

  calibrate_cycle();

  fsf_init();

  SERIAL_CONSOLE_INIT; //marte1.26i+

   param.sched_priority = main_priority;

   if ((terror=pthread_setschedparam (pthread_self (), SCHED_FIFO, &param)))

     LOCAL_ERROR(terror,"pthread_setschedparam");

   instant_zero.tv_sec = 10000000;

   instant_zero.tv_nsec = 10000000;

   clock_settime(CLOCK_REALTIME,&instant_zero);

   clock_gettime(CLOCK_REALTIME,&instant_zero);

   last_time = instant_zero;

//   put_time(&instant_zero, "instant_zero");

//   put_time(NULL, "printing point 1");

//   put_time(NULL, "printing point 2");

   // Adjust the time eater (in load.c)

   //adjust ();

  if ((terror=fsf_initialize_contract(&contract)))

  {

     printf(" Initialize fail for server A\n");

     LOCAL_ERROR(terror,"fsf_initialize_contract failed");

  }

  if ((terror=fsf_set_contract_basic_parameters (&contract,

                                    &budget_min,

                                    &period_max,

                                    workload)))

  {

     printf("Set_Basic_Parameters failed for server A\n");

     LOCAL_ERROR(terror,"set_contract_basic_parameters failed");

  }

  if ((terror=fsf_set_contract_timing_requirements (&contract,

                                                    d_equals_t,

                                                    (d_equals_t?NULL:&deadline),

                                                    budget_overrun_sig_notify,

                                                    budget_overrun_sig_value,

                                                    deadline_miss_sig_notify,

                                                    deadline_miss_sig_value)))

  {

     printf("Set_Timing_Requirements failed for server A\n");

     LOCAL_ERROR(terror,"fsf_set_contract_timing_requirements failed");

  }

  if ((terror=fsf_set_contract_reclamation_parameters (&contract,

                                                       &budget_max,

                                                       &period_min,

                                                       granularity,

                                                       utilization_set,

                                                       quality,

                                                       importance)))

  {

     printf("Set_Reclamation_Parameters failed for server A\n");

     LOCAL_ERROR(terror,"fsf_set_contract_reclamation_parameters failed");

  }

  //preemption_level = (fsf_preemption_level_t) param.sched_priority;

  if ((terror=fsf_set_contract_synchronization_parameters (&contract,                                          

                                                           critical_sections)))

  {

     printf("Set_Synchronization_Parameters failed for server A\n");

     LOCAL_ERROR(terror,"fsf_set_contract_synchronization_parameters failed");

  }

  terror = fsf_negotiate_contract_for_myself(&contract, &server_A);

  if (terror)

  {

    printf("Negotiate_Contract failed for server A\n");

    ERROR(terror,"fsf_negotiate_contract_for_myself failed");

  }

  { /* Bounded workload task block  */

    struct timespec  next_budget;

    struct timespec  next_period;

    bool             was_deadline_missed = 0;

    bool             was_budget_overran = 0;

    struct timespec  at_absolute_time;

    struct timespec  my_period = {0,53000000}; // 53 miliseconds

    struct timespec  ahora;

    int              i;

    if ((terror=clock_gettime(CLOCK_REALTIME,&at_absolute_time)))

      LOCAL_ERROR(terror,"clock_gettime failed");

    for (i=0;i<500;i++) {

      incr_timespec(&at_absolute_time, &my_period);

      if ((terror=fsf_schedule_timed_job (

                                       &at_absolute_time,

                                       &next_budget,

                                       &next_period,

                                       &was_deadline_missed,

                                       &was_budget_overran)))

      {

         ERROR(terror,"fsf_bounded_server: a call to fsf_schedule_next_timed_job failed");

      }

      //printf("\ndebug: now es-> (%d,%d)\n", now.tv_sec, now.tv_nsec);

      if ((terror=clock_gettime(CLOCK_REALTIME,&ahora)))

        LOCAL_ERROR(terror,"ahora clock_gettime failed");

      //printf("\ndebug: y ahora es-> (%d,%d)\n", ahora.tv_sec, ahora.tv_nsec);

      decr_timespec(&ahora, &at_absolute_time);

      if ( smaller_timespec(&ahora, &min_jitter) )

        min_jitter = ahora;

      if ( smaller_timespec(&max_jitter, &ahora) )

        max_jitter = ahora;

      incr_timespec(&avg_jitter, &ahora);

      my_counter++;

    }  

    printf("\n\n        minimum jitter is: %8d\n", min_jitter.tv_nsec+ min_jitter.tv_sec*1000000000);

    printf("        maximum jitter is: %8d\n", max_jitter.tv_nsec+ max_jitter.tv_sec*1000000000);

    printf("        average jitter is: %8d\n\n", (avg_jitter.tv_nsec+ avg_jitter.tv_sec*1000000000)/my_counter);

  } /* End of bounded workload task block  */

  STANDARD_CONSOLE_INIT; //marte1.26i+

  printf("\n\n        minimum jitter is: %8d\n", min_jitter.tv_nsec+ min_jitter.tv_sec*1000000000);

  printf("        maximum jitter is: %8d\n", max_jitter.tv_nsec+ max_jitter.tv_sec*1000000000);

  printf("        average jitter is: %8d\n\n", (avg_jitter.tv_nsec+ avg_jitter.tv_sec*1000000000)/my_counter);

  //printf("\nThe end.\n");

  //stop_scheduler = 1;

  exit(0);

  return 0;

} /* End of main */