#!/bin/bash

DIRECTORY="$(readlink -f "$(dirname "$(dirname "$0")")")"

function error {
  echo -e "\e[91m$1\e[39m"
  exit 1
}

#remove week-old logfiles
find "$DIRECTORY/logs" -type f -mtime +6 -exec rm -f {} \;

#list of all files within "$DIRECTORY/logs", newest first
logfiles="$(ls "$DIRECTORY/logs"/* -t)"

if [ ! -z "$(date +%p)" ];then
  #system locale uses AM and PM in time/dates
  ampm=1
else
  #date command didn't output anything - system locale uses 24-hour clock
  ampm=0
fi 

#determine which day of the week it is. (used for text replacement)
today="$(date +%A)"
#determine which day of the week yesterday was. (used for text replacement)
yesterday=$(date +%A --date='yesterday')

#create a named pipe to send list to yad on-the-fly
pipe="$(mktemp -u)" #get a random filename to work with
mkfifo $pipe #make the named pipe
trap "rm $pipe" EXIT #remove this named pipe on exit
echo pipe is $pipe

#generate the yad list in a subprocess and send the output to the pipe as it's being generated
(
IFS=$'\n'
for file in $logfiles ;do
  #Parse various tidbits based on the filename
  #$app: the name of the app for this logfile
  app="$(echo "$(basename "$file")" | sed 's/^install-//g' | sed 's/^uninstall-//g' | sed 's/^incomplete-//g' | sed 's/^fail-//g' | sed 's/^success-//g' | sed 's/.log.*$//g')"
  #$action: will be 'install' or 'uninstall'
  action="$(echo "$(basename "$file")" | sed 's/-fail-//g' | sed 's/-success-//g' | sed 's/-incomplete-//g' | sed 's/'"$app"'.*$//g')"
  #$result: will be 'success' or 'fail'
  result="$(echo "$(basename "$file")" | sed 's/^install-//g' | sed 's/^uninstall-//g' | sed 's/-'"$app"'.*$//g')"
  #$date: human-readable timestamp.
  if [ $ampm == 1 ];then
    #AM/PM timestamp: 'Friday 6:21 PM'
    date="$(date -r "$file" '+%A %l:%M %p' | sed 's/  / /g' | sed "s/$today/Today/g" | sed "s/$yesterday/Yesterday/g")"
  else
    #24h timestamp: 'Friday 18:21'
    date="$(date -r "$file" '+%A %k:%M' | sed 's/  / /g' | sed "s/$today/Today/g" | sed "s/$yesterday/Yesterday/g")"
  fi
  
  #echo "$app\n  $action\n  $result\n"
  
  #determine app icon
  if [ -f "${DIRECTORY}/apps/${app}/icon-24.png" ];then
    app_icon="${DIRECTORY}/apps/${app}/icon-24.png"
  else
    app_icon="${DIRECTORY}/icons/none-24.png"
  fi
  
  #determine action icon
  if [ "$action" == uninstall ];then
    action_icon="${DIRECTORY}/icons/uninstall.png"
  elif [ "$action" == install ];then
    action_icon="${DIRECTORY}/icons/install.png"
  else
    action_icon="${DIRECTORY}/icons/none-24.png"
  fi
  
  #determine result icon
  if [ "$result" == success ];then
    result_icon="${DIRECTORY}/icons/success.png"
  elif [ "$result" == fail ];then
    result_icon="${DIRECTORY}/icons/failure.png"
  else #incomplete
    result_icon="${DIRECTORY}/icons/interrupted.png"
  fi
  
  #determine caption - "Installing Zoom succeeded."
  if [ "$action" == uninstall ];then
    caption="Uninstalling $app"
  elif [ "$action" == install ];then
    caption="Installing $app"
  fi
  if [ "$result" == success ];then
    caption+=" succeeded."
  elif [ "$result" == fail ];then
    caption+=" failed."
  else #incomplete
    caption+=" was interrupted."
  fi
  
  #add lines to the yad list
  echo "$date
$action_icon
$app_icon
$result_icon
$caption
$file" > "$pipe"
  
done
) &

echo
echo ready

yad --center --title='Log file viewer' --width=500 --height=400 --on-top \
  --text="Review the errors from installing or uninstalling apps."$'\n'"Week-old log files will be deleted." \
  --list --separator='\n' --window-icon="${DIRECTORY}/icons/settings.png" \
  --column=Day --column=I:IMG --column=A:IMG --column=R:IMG --column=Description --column=tooltip:HD \
  --print-column=6 --tooltip-column=6 --select-action="$(dirname "$0")/viewlog" --dclick-action='true' \
  --button='Delete all'!"${DIRECTORY}/icons/trash.png"!"Delete all log files from $DIRECTORY/logs":2 \
  --button=Close!"${DIRECTORY}/icons/exit.png":1 < <(tail -f --retry "$pipe")

button=$? #get exit code of yad

#delete all logfiles if user requested
if [ $button == 2 ];then
  rm -rf "$DIRECTORY/logs"
  mkdir "$DIRECTORY/logs"
  echo "Deleted everything inside of $DIRECTORY/logs"
fi