#!/bin/bash
#
# PatchControl
#
# This script helps the shifter to easily operate both the line and
# the DAQ processes until the ControlUnit will be finalised.
#
# Author: Carmelo Pellegrino <carmelo.pellegrino@bo.infn.it>
#

function put_lock() {
  touch /tmp/pc.lock
}

function rm_lock() {
  unlink /tmp/pc.lock
}

function test_lock() {
  if [ -e /tmp/pc.lock ]; then
    return 1
  else
    return 0
  fi
}

function on_exit() {
  if [ "${LOCK_OWNER}" == "True" ]; then
    rm_lock
  fi

  local pid

  for pid in ${PROCS[*]}; do
    kill -9 ${pid}
  done
  unset pid
}

function createList() {
  local LIST
  local file

  for file in *.detectorfile; do
    LIST=(${LIST[*]} "FALSE" ${file})
  done
  unset file

  echo ${LIST[*]}
}

function dm_driver() {
  echo "set session target = run"

  sleep $1

  echo exit
  echo y
}

function log() {
  [ ! -d ~/.km3_private ] && mkdir -p ~/.km3_private
  local logfile="~/.km3_private/pc.log"
  date      >>${logfile}
  echo ${*} >>${logfile}
}

function nowUTC() {
  # print the number of seconds elapsed since Jan 1 1970 00:00 in UTC
  date -u +%s
}

function get_run_number() {
  [ ! -d ~/.km3_private ] && mkdir -p ~/.km3_private
  [ ! -e ~/.km3_private/last_run_number ] && echo 0 >~/.km3_private/last_run_number
  local last_run_number=`cat ~/.km3_private/last_run_number`
  local run_number

  let "run_number = ${last_run_number} + 1"

  echo ${run_number} > ~/.km3_private/last_run_number
  echo ${run_number}
}

# Script begins here

test_lock || { zenity --error --text="There is another instance running of this program."; exit 1;}

put_lock
LOCK_OWNER="True"

trap on_exit EXIT

while [ 1 ]; do

  # Ask for the run setup

  rs_file=`zenity --title "Run Setup Selector" \
                   --list \
                   --text "Select one of the following Run Setups:" \
                   --radiolist \
                   --column="Selection" \
                   --column="Run Setup file" \
                   $(createList ${folder})`

  if [ -z "${rs_file}" ]; then
    zenity --error --text="No Run Setup file selected, aborting"
    exit -1
  fi

  # Ask for run duration

  run_duration=`zenity --title "Run duration" \
                       --list \
                       --text "Select one of the following duration [minutes]:" \
                       --radiolist \
                       --column="Selection" \
                       --column="Minutes" \
                       FALSE Cancel FALSE 5 TRUE 10 FALSE 20`

  if [ "${run_duration}" != "Cancel" ]; then
    break
  fi

done

# Wait 10 seconds
i=0;
while [ $i -lt 100 ]; do
  let "i = $i + 10"
  echo $i
  sleep 1
done | zenity --progress \
              --auto-close \
              --text="You have 10 seconds to cancel the current operation:\nrunsetup: ${rs_file}\nduration: ${run_duration} minutes" \
              --auto-kill

# Peak the run number

run_number=`get_run_number`
let "run_duration_seconds = ${run_duration} * 60"

log "Run ${run_number} ready to start. \
Run start time = ${run_start_time}, \
run duration = ${run_duration} minutes, \
run setup file = ${rs_file}."

daq_log_file=~/.km3_private/daq_${run_number}.log
JGetMessage -H localhost -T MSG -d 3 >${daq_log_file} &
PROCS=(${PROCS[*]} $!)

# Copy selected run setup file, changing the run number
cat ${rs_file} | sed -e 's/RUNNUMBER/${run_number}/' >dm.detectorfile

run_start_time=`nowUTC`

# Launch the DM
dm_driver ${run_duration_seconds} | mono DetectorControl.exe --control --reset &
PROCS=(${PROCS[*]} $!)

# Launch the DAQ
log "Launching the DAQ with the following command line: daq.sh ${run_number} ${run_start_time} ${run_duration_seconds}"
daq.sh ${run_number} ${run_start_time} ${run_duration_seconds}

# Point the browser to the correct address, if required
zenity --question \
       --text="Would you like to open the DetectorManager GUI?" \
       --cancel-label="No, thanks" && firefox http://localhost:1301/ &

# Wait the end of the run
sleep ${run_duration_seconds}

log "Run ${run_number} finished."
zenity --info --text="Run ${run_number} finished! The DAQ log file is located in ${daq_log_file}."

exit 0