#!/bin/bash
function main {

  # Snippet from SO user Dave Dopson http://stackoverflow.com/questions/59895/can-a-bash-script-tell-what-directory-its-stored-in
  SOURCE="${BASH_SOURCE[0]}"
  # resolve $SOURCE until the file is no longer a symlink
  while [ -h "$SOURCE" ]; do
    DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
    SOURCE="$(readlink "$SOURCE")"
    # if $SOURCE was a relative symlink, we need to resolve it
    # relative to the path where the symlink file was located
    [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"
  done
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  K_MEANS=16
  WALLPAPER_DIR=${WALLPAPER_DIR:-~/.wallpapers/}

  while test $# -gt 0; do
      case "$1" in
          usage | -h | --help)
              shift
              usage
              ;;
          n | -n)
              shift
              K_MEANS=$1
              shift
              ;;
          add | -a | --add)
              shift
              add $*
              ;;
          rm | remove | -rm | --remove)
              shift
              remove $*
              ;;
          change)
              shift
              change $*
              ;;
          current)
              shift
              current $*
              ;;
          ls | list | -l | --list)
              shift
              list $*
              ;;
          colors)
              shift
              colors
              ;;
          slideshow)
              shift
              slideshow $*
              ;;
          *)
              shift
              indent "$1 is not a recognised directive"
              ;;
      esac
  done
}

#:: Prety print function
function indent {
  echo ":: $*"
}

#:: Confirm user input
function confirm {
  indent $1
  read -sn 1 ans
  case "$ans" in
    y|Y|yes|YES|Yes) return 0 ;;
    *)  return 1 ;;
  esac
}

#:: Directives

function add {
  if [ 0 = $# ]; then
    indent "No file argument provided"
    exit 1
  fi

  files=$*

  for file in $files; do
    if [ ! -f $file ]; then
      indent "File '$file' doesn't exist"
      exit 1
    fi
  done

  cp $files $WALLPAPER_DIR
  cd $WALLPAPER_DIR

  for file in $*; do
    echo ":: Generating .$file.colors and .$file.Xres in $PWD"
    python2 $DIR/py/color_detect.py $file $K_MEANS
  done
}

function remove {
  if [ 0 = $# ]; then
    if confirm "Delete current background? [Y/n]"; then
      remove $(basename $(get_current))
    else
      echo "exiting"
      exit 1
    fi
  fi

  for file in $*; do
    indent "Removing $file"
    rm ${WALLPAPER_DIR}/${file}
    rm ${WALLPAPER_DIR}/.${file}.{colors,Xres}
  done
}

function change {
  #:: Select a random background from WALLPAPER_DIR, or use the passed background
  if [ -z $1 ]; then
    background=$(find $WALLPAPER_DIR -type f \( ! -iname ".*" \) | shuf -n1)
  else
    background=$WALLPAPER_DIR/$1

    if [ ! -f $background ]; then
      indent "$1 does not exist in $WALLPAPER_DIR"
      exit 1
    fi
  fi

  if [ -f ${background}.Xres ] || [ -f ${background}.colors ]; then
    indent "Could not find ${background}.Xres or ${background}.colors"
    exit 1
  fi

  filename=$(basename $background)
  dirname=$(dirname $background)

  #:: Set the background
  feh --bg-fill $background

  #:: Record the current background
  set_current $background

  if [ $? -ne 0 ]; then
    indent "Failed to set $background as background"
  else
    indent "Set $background as background"

    #:: Set the colorscheme
    ln -f ${dirname}/.${filename}.colors ~/.colors
    xrdb -merge ${dirname}/.${filename}.Xres
  fi
}

function slideshow {
  if [ -z $2 ]; then
    PAPERS=$(list)
  elif [ -e $2 ]; then
    PAPERS=$(cat $2)
  else
    PAPERS=$2
  fi

  for img in $PAPERS; do
    change $img
    if [ ! -z "$1" ]; then
        /bin/bash -c "$1"
    fi
    sleep 7
  done
}

function current {
  indent $(get_current)
}

function get_current {
  readlink -f $WALLPAPER_DIR/.current
}

function set_current {
  ln -sf $1  $WALLPAPER_DIR/.current
}

function list {
  ls $* $WALLPAPER_DIR
}

function colors {
  # Original: http://frexx.de/xterm-256-notes/
  #           http://frexx.de/xterm-256-notes/data/colortable16.sh
  # Modified by Aaron Griffin
  # and further by Kazuo Teramoto
  FGNAMES=(' black ' '  red  ' ' green ' ' yellow' '  blue ' 'magenta' '  cyan ' ' white ')
  BGNAMES=('DFT' 'BLK' 'RED' 'GRN' 'YEL' 'BLU' 'MAG' 'CYN' 'WHT')

  echo "     ┌──────────────────────────────────────────────────────────────────────────┐"
  for b in {0..8}; do
    ((b>0)) && bg=$((b+39))

    echo -en "\033[0m ${BGNAMES[b]} │ "

    for f in {0..7}; do
      echo -en "\033[${bg}m\033[$((f+30))m ${FGNAMES[f]} "
    done

    echo -en "\033[0m │"
    echo -en "\033[0m\n\033[0m     │ "

    for f in {0..7}; do
      echo -en "\033[${bg}m\033[1;$((f+30))m ${FGNAMES[f]} "
    done

    echo -en "\033[0m │"
    echo -e "\033[0m"

    ((b<8)) &&
    echo "     ├──────────────────────────────────────────────────────────────────────────┤"
  done
  echo "     └──────────────────────────────────────────────────────────────────────────┘"
}

function usage {
  printf "%b" "  $0 [action] [options]

Actions
- usage:                Print this help message.
- n [number]   :        Number of colors to gather.
- add [file]...:        Add file, or files, to the wallpaper database.
- rm  [file]...:        Remove file, or files, from the wallpaper database.
- change [file]:        Set the wallpaper to file, or a random wallpaper
                        from the wallpaper database.
- slideshow [cmd file]: Rotate through wallpapers, optionally
                        running cmd each time and using only
                        wallpapers listed in the file.
- current:              List the current background
- ls:                   List all wallpapers in the database.
- colors:               Display the current set of colors.
"
}

#:: End function declaration, begin executing
main $*
~/.config/bspwm/colors
pkill panel
~/bin/panel & disown 
source ~/.colors
#convert -font DejaVuSansB -pointsize 30 -stroke $COLOR0 -strokewidth 1 -fill $COLOR11 -draw 'text 70,60 "Vasil Zlatanov -> +46 723537981 vasil.zlatanov@gmail.com" ' $background ~/.wallpaper.png &
convert $background ~/.wallpaper.png &
chmod +x ~/.colors
~/.config/vimb/color-gen
~/.config/ratpoison/ratcolor