#!/bin/sh

die() {
    echo "$1" >&2
    exit 1
}

in_list() {
    for i in $1
    do
	[ "$i" == "$2" ] && return 0
    done
    return 1
}

cd $(dirname "$0")

[ -n "${DESTDIR}" ] || DESTDIR=~

if [ "$1" == "install" ] || [ "$1" == "link" ] || [ "$1" == "links" ]
then
    REMOVE=1
    BIN="ln -s"
elif [ "$1" == "update" ] || [ "$1" == "pull" ]
then
    git stash &&
    git pull --recurse-submodules=yes --rebase `git remote | head -n 1` &&
    git stash pop
    exit $?
elif [ "$1" == "remove" ] || [ "$1" == "uninstall" ]
then
    REMOVE=0
    BIN="rm"
elif [ "$1" == "copy" ]
then
    REMOVE=1
    BIN="cp -r"
else
    echo -e "\e[32;01mNemunaire's configuration \e[0;33m("`git branch --no-color | grep '*' | cut -d " " -f 2-`")\e[0m"
    echo -e "    \e[01mAuthor:\e[0m\t\t"`git log -1 --format="%aN <%aE>"`
    echo -e "    \e[01mOriginal source:\e[0m\thttps://git.nemunai.re/?p=conf.git"
    echo
    echo -e "\e[01mUsage:\e[0m"
    echo -e "    $0 \e[36;01minstall\e[0m"
    echo -e "        Create symbolic links from this directory to your home"
    echo -e "    $0 \e[36;01mremove\e[0m"
    echo -e "        Remove symbolic links from your home"
    echo -e "    $0 \e[36;01mupdate\e[0m"
    echo -e "        Pull latest commits from the server at" `git remote -v | head -n 1 | cut -f 2`
    echo -e "    $0 \e[36;01mcopy\e[0m"
    echo -e "        Copy configuration files instead of making links"
    exit 0
fi

git submodule update --init --recursive || die "Unable to update submodules"

IGNORE_FILES=".
              ..
              .git
              .gitmodules
              install.sh"

TMPERR=`mktemp`
install_dir() {
    for f in `ls -a "$1"`
    do
	if ! in_list "$IGNORE_FILES" "$f"
	then
            if [ "$REMOVE" -eq 0 ]; then
		echo -ne "Removing $1/$f ...\t"
		if [ -L "${DESTDIR}/$1/$f" ]; then
                    $BIN "${DESTDIR}/$1/$f" >&2 2> "$TMPERR"
	            if [ $? == 0 ]; then echo -e "\e[32mdone\e[0m"; else echo -e "\e[31;01mfail\e[0m"; fi
	            cat "$TMPERR"
		else
                    echo -e "Not installed"
		fi
            else
		echo -ne "Installing $1/$f ...\t"

		# Alignment
		[ $((${#f} + ${#1})) -lt 8 ] && echo -en "\t"; [ $((${#f} + ${#1})) -lt 16 ] && echo -en "\t"

		if [ -L "${DESTDIR}/$1/$f" ]
		then
	            echo -e "\e[36mAlready installed\e[0m"
		elif [ -d "${DESTDIR}/$1/$f" ] && [ -d "$1/$f" ]
		then
	            echo -e "\e[33mExistant directory\e[0m"
		    install_dir "$1/$f"
		elif [ -e "${DESTDIR}/$1/$f" ]
		then
	            echo -e "\e[35mAlready exists\e[0m"
		else
	            if $BIN "$(pwd)/$1/$f" "${DESTDIR}/$1/$f" >&2 2> "$TMPERR"
	            then
			echo -e "\e[32mdone\e[0m"
		    else
			echo -e "\e[31;01mfail\e[0m"
		    fi
	            cat "$TMPERR"
		fi
            fi
	fi
    done
}
install_dir .
rm "${TMPERR}"