#!/bin/sh
# Symlink is a small script to basically make `ln -s` less of a pain in the ass.
# This script automagically figures out which direction you mean, and allows you to
# pass in two actual paths (which works with tab completion) and specify if you mean
# to make a relative or absolute link (relative is assumed by default).
#
#     Usage: symlink [-a|--absolute] path1 path2
#
absolute="n"
if [ "$1" = "-a" ] || [ "$1" = "--absolute" ]; then
    absolute="y"
    shift
fi

if [ $# -ne 2 ]; then
    echo "Usage: symlink [-a|--absolute] <target or link> <target or link>"
    exit 1
fi

if [ -e "$1" ] && [ -e "$2" ]; then
    printf "Both \x1b[1m%s\x1b[0m and \x1b[1m%s\x1b[0m already exist. Please delete one of them before proceeding.\n" "$@"
    exit 1
elif ! [ -e "$1" ] && ! [ -e "$2" ]; then
    printf "\x1b[31mWarning: Neither \x1b[1m%s\x1b[22m nor \x1b[1m%s\x1b[22m exist!\x1b[0m\n" "$@"
    choice=$(printf "%s\n" "1. $1 -> $2" "2. $2 -> $1" "3. Whoops that was a mistake" | fzy -p "Which do you mean? " | awk -F. '{print $1}' || exit 1)
    case $choice in
        1) linkname="$1"; target="$2";;
        2) linkname="$2"; target="$1";;
        *) exit 1;;
    esac
elif [ -e "$1" ]; then
    linkname="$2"; target="$1"
else
    linkname="$1"; target="$2"
fi

if [ $absolute = "y" ]; then
    target="$(realpath "$target")"
else
    target="$(realpath --relative-to="$(dirname "$linkname")" "$target")"
fi

printf "Linking \x1b[1m%s\x1b[0m -> \x1b[1m%s\x1b[0m Is this okay?" "$linkname" "$target"
ask -y || exit 1
echo
ln -sv -T "$target" "$linkname"