#include <CAEN_FELib.h>

#include <cstdlib>
#include <cstdio>
#include <unistd.h>
#include <cmath>
#include <time.h> // time in nano-sec

void RawDecorder(uint8_t * data, size_t size, int verbose = 0){
  uint64_t haha ; 
  unsigned short dataType;
        
  int word = 0; 
  int traceWord = -2;
  for( int i =0 ; i < ((int)size / 8) ; i++){
    
    ///the data is array of 1 byte. 
    /// by get the point of the data[8*i] 
    /// cast it into uint64_t pointer, that will get 8 bytes all togteher
    /// get this point value, and bit swap it. 
    haha =  __builtin_bswap64(*(uint64_t *)&(data[8*i])); 
    if (verbose > 0 ) printf("%7d | %3d | %3d | 0x%016lX \n", i, word, traceWord, haha);

    if ( word == 0 ){ /// aggregation header, or start header, or end header
      dataType = ( haha >> 56 ) & 0xFF ;
      if ( verbose> 0 & dataType == 0x30 ) printf("====== start Run data\n");
      if ( verbose> 0 & dataType == 0x32 ) printf("====== Stop Run data\n");
      if ( verbose> 0 & (dataType >> 4) == 0x2 ) printf("====== data aggregation start\n");
    }else{


      if( dataType == 0x30 ){
        if( word == 1){
          if( (haha & 0xFFFFFFFF) != 0x2000000) printf("*** something wrong.\n");
        }
        uint64_t channelMask;
        if( word == 2){
          channelMask = ( haha & 0xFFFFFFFF );
        }
        if( word == 3){
          channelMask += (( haha & 0xFFFFFFFF ) << 32);
          if (verbose > 0 ) printf("Channel mask : 0x%016lX\n", channelMask);
        }
        
      }

      if( (dataType >> 4 ) == 0x2 ) {
        unsigned short chID ;
        uint64_t timestamp ;
        bool hasTrace;
        unsigned short fl ; // flag low
        unsigned short fh ; // flog hight
        unsigned short energy ;
        unsigned short fTime ;

        unsigned short traceLength;

        unsigned short anaProb0[512];
        unsigned short anaProb1[512];
        bool digProb0[512];
        bool digProb1[512];
        bool digProb2[512];
        bool digProb3[512];

        if( word == 1){
          chID = ((haha >> 56) & 0x7F);
          timestamp = (haha & 0xFFFFFFFFFFFF);
        }else if( word == 2){
          hasTrace = ((haha >> 62) & 0x1);
          fl = (( haha >> 50) & 0x1FFF);
          fh = (( haha >> 41) & 0xFF);
          energy = (haha & 0xFFFF);
          fTime = ((haha >> 15) & 0x7FF);
        }else{
          if( ((haha >> 63) & 0x1 ) == 1 && traceWord == -2) {
            //printf("=====last word of header\n");
            traceWord = 0;

            if (verbose > 0 ) printf("ch %2d, energy %5u, time %10lu, fTime %5u %10.2f ms 0x%X, 0x%X, %u\n", 
                    chID, energy, timestamp, fTime, (timestamp*8 + fTime*0.0078125) / 1e+6 , fl, fh, hasTrace); 
            
            word ++;
            continue;
          }

          if( hasTrace) {
            if( traceWord == 0) {
              traceLength = (haha & 0xFFF );              
              word ++;
              traceWord ++;
              continue;
            }

            if( traceWord > 0 ){
              anaProb0[traceWord-1] = (haha & 0x3FFF);
              anaProb1[traceWord-1] = ((haha >> 16) & 0x3FFF);
              digProb0[traceWord-1] = ((haha >> 14) & 0x1);
              digProb1[traceWord-1] = ((haha >> 15) & 0x1);
              digProb2[traceWord-1] = ((haha >> 30) & 0x1);
              digProb3[traceWord-1] = ((haha >> 31) & 0x1);

              traceWord ++;

              if( traceWord - 1 == traceLength ){  
                //printf("============= end of one data, traceLength = %d\n", traceLength);
                word = 0;
                traceWord = -2;
              }
            }
          }
        }

      }

    }
    word++;
  }
}

int main(){

  int ret;
  timespec t0, t1, t2;
  
  //#################################### Open digitizer
  uint64_t dev_handle;
  ret = CAEN_FELib_Open("dig2://192.168.0.100", &dev_handle);

  //#################################### Get some values
  char value[256];
  ret = CAEN_FELib_GetValue(dev_handle, "/par/ModelName", value);
  printf("Model name:\t%s\n", value);
  ret = CAEN_FELib_GetValue(dev_handle, "/par/NumCh", value);
  short NChannel = atoi(value);
  printf("Channels:\t%u\n", NChannel);

  //#################################### Reset
  ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/reset");

  //#################################### Program digitizer 

  /// Channel enable
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/ChEnable", "true");

  /// Global trigger configuration
  ret = CAEN_FELib_SetValue(dev_handle, "/par/GlobalTriggerSource", "SwTrg | TestPulse"); // use test Pulse
  ret = CAEN_FELib_SetValue(dev_handle, "/par/TestPulsePeriod", "1000000"); /// ns, 1 msec
  ret = CAEN_FELib_SetValue(dev_handle, "/par/TestPulseWidth", "16");  ///ns

  /// Wave configuration
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/ChRecordLengthS", "512"); // when setting sample, the ChRecordLengthT will not set. vice versa
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveTriggerSource", "GlobalTriggerSource");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveResolution", "RES8"); // 8 ns
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveAnalogProbe0", "ADCInput");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveAnalogProbe1", "TimeFilter");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveDigitalProbe0", "Trigger");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveDigitalProbe1", "TimeFilterArmed");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveDigitalProbe2", "EnergyFilterBaselineFreeze");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/WaveDigitalProbe3", "EnergyFilterPeakReady");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/ChPreTriggerS", "100");

  /// Event configuration
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EventTriggerSource", "GlobalTriggerSource");

  /// Filter parameters
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/TimeFilterRiseTimeS", "10");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterRiseTimeS", "100");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterFlatTopS", "100");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/TriggerThr", "3");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterPeakingPosition", "80");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterPoleZeroS", "1000");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/TimeFilterRetriggerGuardS", "10");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterPileupGuardT", "10");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterBaselineGuardS", "100");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/PulsePolarity", "Positive");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterLFLimitation", "Off");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterBaselineAvg", "Medium");
  ret = CAEN_FELib_SetValue(dev_handle, "/ch/0..63/par/EnergyFilterFineGain", "1.0");


  if( ret != CAEN_FELib_Success) printf("errro in set value\n");

  //#################################### setting readout
  ret = CAEN_FELib_GetValue(dev_handle, "/ch/10/par/ChRecordLengthS", value);
  if( ret != CAEN_FELib_Success) printf("errro in get value\n");
  

  printf("trace length : %s sample\n", value);

  //#################################### Set the end point for data 
  /*
  {//----------------------- RAW
    uint64_t ep_handle;
    ret = CAEN_FELib_GetHandle(dev_handle, "/endpoint/raw", &ep_handle);

    //---------- configure endpoint
    uint64_t ep_folder_handle;
    ret = CAEN_FELib_GetParentHandle(ep_handle, NULL, &ep_folder_handle);
    ret = CAEN_FELib_SetValue(ep_folder_handle, "/par/activeendpoint", "raw");
    
    ret = CAEN_FELib_SetReadDataFormat(ep_handle, 
      " [ \
           { \"name\": \"DATA\",     \"type\": \"U8\", \"dim\": 1 }, \
           { \"name\": \"SIZE\",     \"type\": \"SIZE_T\" }, \
           { \"name\": \"N_EVENTS\", \"type\": \"U32\" }, \
        ]"
    );
    
    uint8_t* data = new uint8_t[200000];
    size_t  size;  /// number of byte of the data, size/8 = word [64 bits]
    uint32_t n_events;
    
    printf("Starting ACQ\n");
    ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/armacquisition");
    ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/swstartacquisition");

    int count  = 0;

    for( int i = 0; i < 10; i++){
    
      //usleep(1000000);
      clock_gettime(CLOCK_REALTIME, &t0);

      ret = CAEN_FELib_ReadData(ep_handle, 100, data, &size, &n_events );
      count ++;
      clock_gettime(CLOCK_REALTIME, &t1);

      if( ret == CAEN_FELib_Success ) {
        printf("================= %u, %ld byte, %d \n", n_events, size, count);

        RawDecorder(data, size); 
        clock_gettime(CLOCK_REALTIME, &t2);
        printf("t2-t1 : %ld\n", t2.tv_nsec-t1.tv_nsec);
        
      }
      printf("t1-t0 : %ld\n", t1.tv_nsec-t0.tv_nsec);
      
    }

    printf("Stop ACQ\n");
    ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/disarmacquisition");
    
  }
  /**/
  
  {//------------------------ DPPPHA
    uint64_t ep_handle;
    ret = CAEN_FELib_GetHandle(dev_handle, "/endpoint/dpppha", &ep_handle);

    //---------- configure endpoint
    uint64_t ep_folder_handle;
    ret = CAEN_FELib_GetParentHandle(ep_handle, NULL, &ep_folder_handle);
    ret = CAEN_FELib_SetValue(ep_folder_handle, "/par/activeendpoint", "dpppha");
    
    ret = CAEN_FELib_SetReadDataFormat(ep_handle,
      " [ \
          { \"name\" : \"CHANNEL\",              \"type\" : \"U8\"  }, \
          { \"name\" : \"TIMESTAMP\",            \"type\" : \"U64\" }, \
          { \"name\" : \"FINE_TIMESTAMP\",       \"type\" : \"U16\" }, \
          { \"name\" : \"ENERGY\",               \"type\" : \"U16\" }, \
          { \"name\" : \"ANALOG_PROBE_1\",       \"type\" : \"I32\", \"dim\" : 1 }, \
          { \"name\" : \"ANALOG_PROBE_2\",       \"type\" : \"I32\", \"dim\" : 1 }, \
          { \"name\" : \"DIGITAL_PROBE_1\",      \"type\" : \"U8\",  \"dim\" : 1 }, \
          { \"name\" : \"DIGITAL_PROBE_2\",      \"type\" : \"U8\",  \"dim\" : 1 }, \
          { \"name\" : \"DIGITAL_PROBE_3\",      \"type\" : \"U8\",  \"dim\" : 1 }, \
          { \"name\" : \"DIGITAL_PROBE_4\",      \"type\" : \"U8\",  \"dim\" : 1 }, \
          { \"name\" : \"ANALOG_PROBE_1_TYPE\",  \"type\" : \"U8\" }, \
          { \"name\" : \"ANALOG_PROBE_2_TYPE\",  \"type\" : \"U8\" }, \
          { \"name\" : \"DIGITAL_PROBE_1_TYPE\", \"type\" : \"U8\" }, \
          { \"name\" : \"DIGITAL_PROBE_2_TYPE\", \"type\" : \"U8\" }, \
          { \"name\" : \"DIGITAL_PROBE_3_TYPE\", \"type\" : \"U8\" }, \
          { \"name\" : \"DIGITAL_PROBE_4_TYPE\", \"type\" : \"U8\" }, \
          { \"name\" : \"WAVEFORM_SIZE\",        \"type\" : \"SIZE_T\" }, \
          { \"name\" : \"FLAGS_LOW_PRIORITY\",   \"type\" : \"U16\"}, \
          { \"name\" : \"FLAGS_HIGH_PRIORITY\",  \"type\" : \"U16\" }, \
          { \"name\" : \"EVENT_SIZE\",           \"type\" : \"SIZE_T\" } \
        ] \
      "
    );

    uint8_t  channel;
    uint64_t timestamp;
    uint16_t fine_timestamp;
    uint16_t energy;

    int32_t*  analog_probes[2];
    uint8_t*  digital_probes[4];

    analog_probes[0] = new int32_t[512];
    analog_probes[1] = new int32_t[512];

    digital_probes[0] = new uint8_t[512];
    digital_probes[1] = new uint8_t[512];
    digital_probes[2] = new uint8_t[512];
    digital_probes[3] = new uint8_t[512];

    uint8_t  analog_probes_type[2];
    uint8_t  digital_probes_type[4];

    size_t   n_samples;
    uint16_t flags_low_priority;
    uint16_t flags_high_priority;
    size_t   event_size;

    //#################################### Read data loop

    printf("Starting ACQ\n");
    ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/armacquisition");
    ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/swstartacquisition");

    timespec tsum;

    int count  = 0;
    for( int i = 0; i < 64*5; i++){
    
      //usleep(10000);
      
      clock_gettime(CLOCK_REALTIME, &t0);
      ret = CAEN_FELib_ReadData(ep_handle, 100,
        &channel,
        &timestamp,
        &fine_timestamp,
        &energy,
        analog_probes[0],
        analog_probes[1],
        digital_probes[0],
        digital_probes[1],
        digital_probes[2],
        digital_probes[3],
        &analog_probes_type[0],
        &analog_probes_type[1],
        &digital_probes_type[0],
        &digital_probes_type[1],
        &digital_probes_type[2],
        &digital_probes_type[3],
        &n_samples,
        &flags_low_priority,
        &flags_high_priority,
        &event_size
      );
      count ++;

      clock_gettime(CLOCK_REALTIME, &t1);
      printf("%3d | t1-t0 : %ld\n", i, t1.tv_nsec-t0.tv_nsec);
      
      tsum.tv_nsec += t1.tv_nsec-t0.tv_nsec;

      if( channel == 63) {
        printf("================###################=== tsum : %ld\n", tsum.tv_nsec);
        tsum.tv_nsec = 0;
      }
      
      
      if( ret == CAEN_FELib_Success ) {
        printf("================= %ld, %d \n", event_size, count);
        printf("ch : %u, energy : %u, time : %lu, fTime : %u \n", channel, energy, timestamp, fine_timestamp);
        printf("nSample: %ld, Flag low: %u, Flag high : %u\n", n_samples, flags_low_priority, flags_high_priority);
        
        printf("Ana prob type: %u, %u, Digi : %u %u %u %u\n", analog_probes_type[0],
                                                              analog_probes_type[1],
                                                              digital_probes_type[0],
                                                              digital_probes_type[1],
                                                              digital_probes_type[2],
                                                              digital_probes_type[3] );
        
        for( int i = 0; i < n_samples; i++){
          if( i % 100 == 0 ) printf("%3d | %d, %d, %u, %u, %u, %u \n", i, analog_probes[0][i],
                                                                 analog_probes[1][i],
                                                                 digital_probes[0][i],
                                                                 digital_probes[1][i],
                                                                 digital_probes[2][i],
                                                                 digital_probes[3][i]);
        }

      }
      
    }

    printf("Stop ACQ\n");
    ret = CAEN_FELib_SendCommand(dev_handle, "/cmd/disarmacquisition");
  }/**/
  
  
  //#################################### Close digitizer
  ret = CAEN_FELib_Close(dev_handle);

}