#!/bin/bash

# averageColorFromImage

# not implemented: 
# - fails with svg files at the moment
# - fails with files where alpha has more info than rgb (full black front for example)
# - will not work with urxvt, plays fine with terminator
# - shellcheck complains

hasImage() {
file "$1" | grep image >/dev/null 2>&1
}

# checks critical
command -v convert >/dev/null 2>&1 || { >&2 echo "I need ImageMagick convert installed." ; exit 1; }

while [ $# -gt 0 ]; do

    hasImage "$1" || { >&2 shift; continue; } # if not an image, skip it
    
    colors=$(convert "$1" -resize 1x1 -format '%[fx:int(255*r)],%[fx:int(255*g)],%[fx:int(255*b)]' info:-)

    # Only draw color block if term is not urxvt
    if [ "$TERM" != "rxvt-unicode" ]; then
    display=${colors//","/";"} # replace , with ;
    foo="\x1b[38;2;"
    bar="m██████████\n██████████\n██████████\n██████████\n██████████\x1b[0m\n"
    printf "$foo$display$bar"
    fi
    
    echo "$colors"
    echo "$1"
    
shift
done