#----------------------------------------------------------

cliPID=0 # previous client process ID

for idx in $(seq 0 $((${#SCANS[@]} / 5 - 1)))
do

  # -- get the data from the array
  idx1=$(($idx * 5))
  idx2=$(($idx1 + 1))
  idx3=$(($idx1 + 2))
  idx4=$(($idx1 + 3))
  idx5=$(($idx1 + 4))
  scanName=${SCANS[$idx1]}
  scanYear=${SCANS[$idx2]}
  scanDay=${SCANS[$idx3]}
  scanStart=${SCANS[$idx4]}
  scanDuration=${SCANS[$idx5]}


  # -- wait until start of next scan
  #    using HEADROOM startup safety margin

  # sysSecs2start=`date --utc --date "01/01/$scanYear $scanStart + $((scanDay - 1)) days" +%s`
  sysSecs2start=`date --utc --date "01/01/$scanYear + $((scanDay - 1)) days $scanStart " +%s`
  sysSecsNow=`date --utc +%s`
  waitTime=$((sysSecs2start - sysSecsNow - HEADROOM))
  if ((waitTime>0)); then
     echo "$0: waiting $waitTime s from now `date --utc +%Y-%m-%dT%H:%M:%S` to start the next scan ${scanName} (len ${scanDuration}s)"
     sleep $waitTime;
  else 
     # -- a past scan, decide what to do
     if ((SKIPOLDSCANS>0)); then
        echo "$0 ERROR: start time in the past (now `date --utc +%Y-%m-%dT%H:%M:%S`), skipping scan ${scanName}"
        continue
     else 
        echo "$0 WARNING: start time in the past (now `date --utc +%Y-%m-%dT%H:%M:%S`), beginning scan ${scanName} anyway"
     fi
  fi


  # -- check and kill old client if still running (it shouldn't be running, unless the transfer went somehow wrong
  #    or the HEADROOM setting is larger than the scheduled idle time between scans)

  if ((cliPID>0)); then
    	if ((`ps -p $cliPID | wc -l` > 1)); then
           echo "$0 WARNING: old ./recpass-tsunami still running, now killing it before next scan"
           kill -HUP $cliPID
        fi
  fi


  # -- start scan download script in the background, and
  #    go to sleep for the expected duration of the scan

  echo "$0 : time is `date --utc +%Y-%m-%dT%H:%M:%S`"   # for debug/check...
  echo "$0: invoking ./recpass-tsunami '$EXPT$USC$SID$USC${scanName}' $scanDuration & into background"
  # tmStart=`date --utc +%s`

  ./recpass-tsunami "$EXPT$USC$SID$USC${scanName}" $scanDuration &
  cliPID=$!

  echo "$0: sleeping..."
  sleep $scanDuration

done

fg