#!/usr/bin/env fish

for filename in $argv
    switch $filename
        case '*.webp'
            set -l basename (basename $filename)
            set -l dirname (dirname $filename)
            set -l rootname (echo $basename | string split -f 1 -m 1 -r .)
            set targetname "$dirname/$rootname.png"
    
            set attempt 0
            while test $attempt -le 200
                if test -f $targetname
                    set attempt (math $attempt + 1)
                    set targetname "$dirname/$rootname-$attempt.png"
                    continue
                end
                convert "$filename" "$targetname"
                break
            end
        case '*.webm'
            set -l basename (basename $filename)
            set -l dirname (dirname $filename)
            set -l rootname (echo $basename | string split -f 1 -m 1 -r .)
            set -l targetname "$dirname/$rootname.mp4"
    
            ffmpeg -i $filename -c:v libx264 -crf 24 $targetname
        case '*'
            echo "Neither webp nor webm, skipping."
    end
end