#!/bin/bash

. <(ffoom init)
FFOO_INIPATH="__FFOO_INIPATH__"

ffoo import core
ffoo import ini

DEFAULT_TARGET=$HOME
TRY_RELPATH=true
FORCE=false

PY_SCRIPT="
import os.path
import sys
src, dst = sys.argv[1:]
r = os.path.relpath(src, dst)
a = os.path.abspath(src)
if len(a) < len (r):
    print a
else:
    print r
"

usage() {
    local u
    u="[-d|--debug] [-f|--force] [-v|--verbose]"
    u="$u [-i|--intermediate] [-t|--target TARGET] SOURCE [NAME]"
    usage_is "$u"
}

link() {
    local src=$1
    local dst=$2

    debug -v src dst

    if $TRY_RELPATH;
    then
        src=$(python <(echo "$PY_SCRIPT") "$src" "$(dirname $dst)")
    fi

    think "linking $src to $dst"

    rm -f $dst
    ln -s $src $dst
}

load() {
    iniread -p ln.dir.$1 ln.ini | expand_tilde | debug_pipe out
}

while true;
do
    case $1 in
        -d|--debug)
            FFOO_DEBUG=true
            shift
            ;;
        -f|--force)
            FORCE=true
            shift
            ;;
        -i|--intermediate)
            intermediate=$2
            shift 2
            ;;
        -v|--verbose)
            FFOO_VERBOSE=true
            shift
            ;;
        -t|--target)
            target=$2
            shift 2
            ;;
        "")
            usage
            ;;
        *)
            src=$1
            name=$2
            break
            ;;
    esac
done

test -z "$target"               && target=$(load target)
test -z "$intermediate"         && intermediate=$(load intermediate)
test -z "$prefix"               && prefix=$(load prefix)
test -z "$target"               && target=$DEFAULT_TARGET

case $prefix.$name in
    .)          die "provide at least name or set prefix in ln.ini";;
    $prefix.)   name=$prefix;;
    .$name)     :;;
    *)          name=$prefix.$name;;
esac

debug -v name intermediate target

mkdir -p $target

if test -n "$intermediate";
then
    mkdir -p $intermediate
    link $src $intermediate/$name
    link $intermediate/$name $target/$name
else
    link $src $target/$name
fi