#!/bin/bash
DIRECTORY="$(readlink -f "$(dirname "$0")")"

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

#ensure settings dir exists
if [ ! -d "${DIRECTORY}/data/settings" ];then
  echo "creating settings directory"
  mkdir -p "${DIRECTORY}/data/settings"
  #create default files inside
  echo '' > "${DIRECTORY}/data/settings/reinstall-after-update"
fi

#$1 is usually left blank. If it equals 'refresh', then empty settings will be created and then the script will exit.
if [ "$1" == 'refresh' ];then
  #set default settings, if they don't exist
  settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"
  PREIFS="$IFS"
  IFS='|'
  for name in $settings
  do
    if [ ! -f "${DIRECTORY}/data/settings/${name}" ] || [ -z "$(cat "${DIRECTORY}/data/settings/${name}")" ];then
      cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
    fi
  done
  IFS="$PREIFS"
  exit 0
  
elif [ "$1" == 'revert' ];then #If $1 equals 'revert', then overwrite all settings with the defaults and then the script will exit.
  
  #overwrite all settings with the defaults
  settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"
  PREIFS="$IFS"
  IFS='|'
  for name in $settings
  do
    cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
  done
  IFS="$PREIFS"
  exit 0
fi

if [ ! -f ~/.local/share/applications/pi-apps-settings.desktop ];then
  echo "Creating Settings menu button"
  echo "[Desktop Entry]
Name=Pi Apps Settings
Comment=Configure Pi-Apps or create an App
Exec=${DIRECTORY}/settings
Icon=${DIRECTORY}/icons/logo.png
Terminal=false
Type=Application
Categories=Settings;" > ~/.local/share/applications/pi-apps-settings.desktop
  
fi

exitloop=''
while [ -z $exitloop ];do
  
  settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"
  yadparams=()
  tooltips=()
  PREIFS="$IFS"
  IFS='|'
  for name in $settings
  do
    params="$(cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#')"
    
    #create file if necessary
    if [ ! -f "${DIRECTORY}/data/settings/${name}" ] || [ -z "$(cat "${DIRECTORY}/data/settings/${name}")" ];then
      cat "${DIRECTORY}/etc/setting-params/${name}" | grep -v '#' | head -n1 > "${DIRECTORY}/data/settings/${name}"
    fi
    #get current setting
    curval="$(cat "${DIRECTORY}/data/settings/${name}")"
    
    #order params, with selected option first
    params="$(echo "$params" | grep -x "$curval")
$(echo "$params" | grep -vx "$curval")"
    
    params="$(echo "$params" | tr '\n' '!')"
    params="${params::-1}"
    
    tooltip="$(cat "${DIRECTORY}/etc/setting-params/${name}" | grep '^#' | tr -d '#' | tr '\n' '\r')"
    tooltip="${tooltip::-1}"
    #echo "Params of ${name}: ${params}"
    #echo "Tooltip of ${name}: ${tooltip}"
    
    yadparams+=(--field=:CB "${params}")
    tooltips+=(--field="${name}":!!"${tooltip}":BTN '')
  done
  IFS="$PREIFS"
  
  output="$(yad --center --title='Pi-Apps Settings' --width=310 --height=300 \
    --form --separator='\n' --window-icon="${DIRECTORY}/icons/logo.png" --columns=2 \
    "${tooltips[@]}" \
    --field='Categories...'!"${DIRECTORY}/icons/categories.png":FBTN "bash -c '${DIRECTORY}/etc/categoryedit &>/dev/null'" \
    --field='Log files...'!"${DIRECTORY}/icons/log-file.png":FBTN "bash -c '${DIRECTORY}/etc/logviewer &>/dev/null'" \
    "${yadparams[@]}" \
    --field='New App...'!"${DIRECTORY}/icons/create.png":FBTN "bash -c '${DIRECTORY}/createapp &>/dev/null'" \
    --button='Reset'!"${DIRECTORY}/icons/backup.png"!'Reset all settings to their defaults':2 \
    --button=Cancel!"${DIRECTORY}/icons/exit.png":1 \
    --button=Save!"${DIRECTORY}/icons/check.png":0 \
  )"
  
  button=$? #get exit code to determine which button was pressed
  #exit if save was not clicked
  [ $button -ne 0 ] && [ $button -ne 2 ] && exit 0

  if [ $button -eq 2 ];then
    output=''
    "${0}" revert
  else
    exitloop=yes
  fi
done

#remove empty lines from $output
output="$(echo "$output" | grep .)"

echo "Output: ${output}EOO"

settings="$(ls "${DIRECTORY}/etc/setting-params" | tr '\n' '|')"

settingnumber=1

PREIFS="$IFS"
IFS='|'
for name in $settings
do
  curval="$(echo "$output" | sed -n "${settingnumber}p")"
  
  echo "Setting '$name' to '$curval'"
  echo "$curval" > "${DIRECTORY}/data/settings/${name}"
  
  settingnumber=$((settingnumber + 1))
done
IFS="$PREIFS"